diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__aggregations_and_comments@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__aggregations_and_comments@datalog_program.snap
index 970f27ea57a..7d127e17bf2 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__aggregations_and_comments@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__aggregations_and_comments@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
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mut (Option < _ > ,) , val : (_ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some ({ let prev : (dfir_rs :: rustc_hash :: FxHashSet < _ > , _) = prev ; let mut set : dfir_rs :: rustc_hash :: FxHashSet < _ > = prev . 0 ; if set . insert (val . 0) { (set , prev . 1 + 1) } else { (set , prev . 1) } }) } else { Some ({ let mut set = dfir_rs :: rustc_hash :: FxHashSet :: < _ > :: default () ; set . insert (val . 0) ; (set , 1) }) } ; })\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (a . 0 . unwrap () . 1 , g . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 1 ,) , (row . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"fold_keyed :: < 'tick , (_ ,) , (Option < _ > ,) > (| | (None ,) , | old : & mut (Option < _ > ,) , val : (_ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some (prev + val . 0) } else { Some (val . 0) } ; })\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (a . 0 . unwrap () , g . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"defer_tick ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 1 ,) , (row . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"fold_keyed :: < 'tick , (_ ,) , (Option < _ > ,) > (| | (None ,) , | old : & mut (Option < _ > ,) , val : (_ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some (prev) } else { Some (val . 0) } ; })\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (a . 0 . unwrap () , g . 0 ,))\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":1},{\"value\":{\"Operator\":\"identity 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\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":21,\"version\":1},{\"idx\":22,\"version\":1},{\"idx\":8,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":17,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":18,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":3,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":16,\"version\":1},{\"idx\":20,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":24,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":1,\"version\":1},{\"value\":1,\"version\":1},{\"value\":1,\"version\":1},{\"value\":1,\"version\":1},{\"value\":0,\"version\":1},{\"value\":2,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints_insert\",\"version\":1},{\"value\":\"ints\",\"version\":1},{\"value\":\"result_insert\",\"version\":1},{\"value\":\"result_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result2_insert\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":false,\"version\":1}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"tee ()\"},\"version\":1},{\"value\":{\"Operator\":\"union ()\"},\"version\":1},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"source_stream (ints)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result2 . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 1 ,) , ((row . 0) ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"fold_keyed :: < 'tick , (_ ,) , (Option < _ > ,) > (| | (None ,) , | old : & mut (Option < _ > ,) , val : (_ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some ({ let prev : (dfir_rs :: rustc_hash :: FxHashSet < _ > , _) = prev ; let mut set : dfir_rs :: rustc_hash :: FxHashSet < _ > = prev . 0 ; if set . insert (val . 0) { (set , prev . 1 + 1) } else { (set , prev . 1) } }) } else { Some ({ let mut set = dfir_rs :: rustc_hash :: FxHashSet :: < _ > :: default () ; set . insert (val . 0) ; (set , 1) }) } ; })\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (a . 0 . unwrap () . 1 , g . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 1 ,) , (row . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"fold_keyed :: < 'tick , (_ ,) , (Option < _ > ,) > (| | (None ,) , | old : & mut (Option < _ > ,) , val : (_ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some (prev + val . 0) } else { Some (val . 0) } ; })\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (a . 0 . unwrap () , g . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"defer_tick ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 1 ,) , (row . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"fold_keyed :: < 'tick , (_ ,) , (Option < _ > ,) > (| | (None ,) , | old : & mut (Option < _ > ,) , val : (_ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some (prev) } else { Some (val . 0) } ; })\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (a . 0 . unwrap () , g . 0 ,))\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":1},{\"value\":{\"Operator\":\"identity 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             );
             df.__assign_diagnostics("[]");
             let (hoff_1v3_send, hoff_1v3_recv) = df
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__aggregations_fold_keyed_expr@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__aggregations_fold_keyed_expr@datalog_program.snap
index 115f312fb08..71f2ee13bd4 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__aggregations_fold_keyed_expr@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__aggregations_fold_keyed_expr@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"source_stream (ints)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 % 2 ,) , (row . 1 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"fold_keyed :: < 'tick , (_ ,) , (Option < _ > ,) > (| | (None ,) , | old : & mut (Option < _ > ,) , val : (_ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some (prev + val . 0) } else { Some (val . 0) } ; })\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 , a . 0 . unwrap () ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":6,\"version\":3},{\"idx\":10,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":6,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":1,\"version\":1},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"source_stream (ints)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 % 2 ,) , (row . 1 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"fold_keyed :: < 'tick , (_ ,) , (Option < _ > ,) > (| | (None ,) , | old : & mut (Option < _ > ,) , val : (_ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some (prev + val . 0) } else { Some (val . 0) } ; })\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 , a . 0 . unwrap () ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":6,\"version\":3},{\"idx\":10,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":6,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":1,\"version\":1},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let (hoff_6v3_send, hoff_6v3_recv) = df
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__anti_join@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__anti_join@datalog_program.snap
index e7d451dc5db..9ae28201dda 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__anti_join@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__anti_join@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"source_stream (ints_1)\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (ints_2)\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (ints_3)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"join :: < 'tick , 'tick , dfir_rs :: compiled :: pull :: HalfMultisetJoinState > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ ,) , ((_ ,) , (_ ,))) | (kv . 0 . 0 , kv . 1 . 0 . 0 , kv . 1 . 1 . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 1 ,) , (_v . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 0 ,) , (_v . 1 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"anti_join ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ ,) , (_ , _ ,)) | (kv . 0 . 0 , kv . 1 . 0 , kv . 1 . 1 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ , _ ,) | ((_v . 0 ,) , (_v . 1 , _v . 2 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ ,) | (_v . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ , _ ,) | ((row . 1 , row . 2 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":9,\"version\":3}],\"version\":5},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":6,\"version\":3}],\"version\":5},{\"value\":[{\"idx\":6,\"version\":3},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":9,\"version\":3},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":26,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":12,\"version\":3},{\"idx\":21,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":19,\"version\":1},{\"idx\":17,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":19,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":20,\"version\":1},{\"idx\":17,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":20,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":21,\"version\":1},{\"idx\":22,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":23,\"version\":1},{\"idx\":21,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":18,\"version\":1},{\"idx\":23,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":24,\"version\":1},{\"idx\":12,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":8,\"version\":1},{\"idx\":24,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":25,\"version\":1},{\"idx\":26,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":22,\"version\":1},{\"idx\":25,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":5},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":5},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Path\":\"neg\"}],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Path\":\"pos\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":3,\"version\":1},\"version\":1},{\"value\":{\"idx\":4,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":19,\"version\":1},{\"idx\":20,\"version\":1},{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1},{\"idx\":23,\"version\":1},{\"idx\":21,\"version\":1},{\"idx\":22,\"version\":1},{\"idx\":25,\"version\":1},{\"idx\":26,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":8,\"version\":1},{\"idx\":24,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":13,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":14,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":1,\"version\":1},{\"value\":0,\"version\":1},{\"value\":0,\"version\":1},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints_1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints_2_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints_3_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_2\",\"version\":1},{\"value\":\"join_2\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_4\",\"version\":1},{\"value\":\"join_4\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"source_stream (ints_1)\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (ints_2)\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (ints_3)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"join :: < 'tick , 'tick , dfir_rs :: compiled :: pull :: HalfMultisetJoinState > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ ,) , ((_ ,) , (_ ,))) | (kv . 0 . 0 , kv . 1 . 0 . 0 , kv . 1 . 1 . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 1 ,) , (_v . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 0 ,) , (_v . 1 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"anti_join ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ ,) , (_ , _ ,)) | (kv . 0 . 0 , kv . 1 . 0 , kv . 1 . 1 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ , _ ,) | ((_v . 0 ,) , (_v . 1 , _v . 2 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ ,) | (_v . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ , _ ,) | ((row . 1 , row . 2 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":9,\"version\":3}],\"version\":5},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":6,\"version\":3}],\"version\":5},{\"value\":[{\"idx\":6,\"version\":3},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":9,\"version\":3},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":26,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":12,\"version\":3},{\"idx\":21,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":19,\"version\":1},{\"idx\":17,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":19,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":20,\"version\":1},{\"idx\":17,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":20,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":21,\"version\":1},{\"idx\":22,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":23,\"version\":1},{\"idx\":21,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":18,\"version\":1},{\"idx\":23,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":24,\"version\":1},{\"idx\":12,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":8,\"version\":1},{\"idx\":24,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":25,\"version\":1},{\"idx\":26,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":22,\"version\":1},{\"idx\":25,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":5},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":5},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Path\":\"neg\"}],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Path\":\"pos\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":3,\"version\":1},\"version\":1},{\"value\":{\"idx\":4,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":19,\"version\":1},{\"idx\":20,\"version\":1},{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1},{\"idx\":23,\"version\":1},{\"idx\":21,\"version\":1},{\"idx\":22,\"version\":1},{\"idx\":25,\"version\":1},{\"idx\":26,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":8,\"version\":1},{\"idx\":24,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":13,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":14,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":1,\"version\":1},{\"value\":0,\"version\":1},{\"value\":0,\"version\":1},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints_1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints_2_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints_3_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_2\",\"version\":1},{\"value\":\"join_2\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_4\",\"version\":1},{\"value\":\"join_4\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let (hoff_6v3_send, hoff_6v3_recv) = df
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__collect_vec@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__collect_vec@datalog_program.snap
index 2746532b102..f732b5c42ef 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__collect_vec@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__collect_vec@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
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,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ ,) | (() , (_v . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | (() , ((row . 0 , row . 1) ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"fold_keyed :: < 'tick , () , (Option < _ > ,) > (| | (None ,) , | old : & mut (Option < _ > ,) , val : (_ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some ({ let mut set : dfir_rs :: rustc_hash :: FxHashSet < _ > = prev ; set . insert (val . 0) ; set }) } else { Some ({ let mut set = dfir_rs :: rustc_hash :: FxHashSet :: < _ > :: default () ; set . insert (val . 0) ; set }) } ; })\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : (() , _) | (a . 0 . unwrap () . into_iter () . collect :: < Vec < _ > > () ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":19,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":9,\"version\":3},{\"idx\":18,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":8,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":15,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":16,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":18,\"version\":1},{\"idx\":19,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":17,\"version\":1},{\"idx\":9,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":17,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":18,\"version\":1},{\"idx\":19,\"version\":1},{\"idx\":8,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":15,\"version\":1},{\"idx\":16,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":17,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":1,\"version\":1},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints2_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_2\",\"version\":1},{\"value\":\"join_2\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"source_stream (ints1)\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (ints2)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"join :: < 'tick , 'tick , dfir_rs :: compiled :: pull :: HalfMultisetJoinState > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : (() , ((_ ,) , (_ ,))) | (kv . 1 . 0 . 0 , kv . 1 . 1 . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ ,) | (() , (_v . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ ,) | (() , (_v . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | (() , ((row . 0 , row . 1) ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"fold_keyed :: < 'tick , () , (Option < _ > ,) > (| | (None ,) , | old : & mut (Option < _ > ,) , val : (_ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some ({ let mut set : dfir_rs :: rustc_hash :: FxHashSet < _ > = prev ; set . insert (val . 0) ; set }) } else { Some ({ let mut set = dfir_rs :: rustc_hash :: FxHashSet :: < _ > :: default () ; set . insert (val . 0) ; set }) } ; })\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : (() , _) | (a . 0 . unwrap () . into_iter () . collect :: < Vec < _ > > () ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":19,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":9,\"version\":3},{\"idx\":18,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":8,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":15,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":16,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":18,\"version\":1},{\"idx\":19,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":17,\"version\":1},{\"idx\":9,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":17,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":18,\"version\":1},{\"idx\":19,\"version\":1},{\"idx\":8,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":15,\"version\":1},{\"idx\":16,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":17,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":1,\"version\":1},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints2_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_2\",\"version\":1},{\"value\":\"join_2\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let (hoff_9v3_send, hoff_9v3_recv) = df
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__detuple@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__detuple@datalog_program.snap
index 0559b25104f..bf44d1c7af8 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__detuple@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__detuple@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (ints1)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row_untuple : (_ ,) | (row_untuple . 0 . 0 , row_untuple . 0 . 1 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"source_reader_0\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (ints1)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row_untuple : (_ ,) | (row_untuple . 0 . 0 , row_untuple . 0 . 1 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"source_reader_0\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let mut sg_1v1_node_7v1_stream = {
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__detuple_then_flat@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__detuple_then_flat@datalog_program.snap
index 77652992c93..40f29209ed8 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__detuple_then_flat@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__detuple_then_flat@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (ints1)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row_untuple : (_ ,) | (row_untuple . 0 . 0 , row_untuple . 0 . 1 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"flat_map (| row : (_ , _ ,) | row . 0 . into_iter () . map (move | __flattened_element | (__flattened_element , :: std :: clone :: Clone :: clone (& row . 1) ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"flat_map (| row : (_ , _ ,) | row . 1 . into_iter () . map (move | __flattened_element | (:: std :: clone :: Clone :: clone (& row . 0) , __flattened_element ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":12,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":12,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"source_reader_0\",\"version\":1},{\"value\":\"source_reader_0\",\"version\":1},{\"value\":\"source_reader_0\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (ints1)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row_untuple : (_ ,) | (row_untuple . 0 . 0 , row_untuple . 0 . 1 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"flat_map (| row : (_ , _ ,) | row . 0 . into_iter () . map (move | __flattened_element | (__flattened_element , :: std :: clone :: Clone :: clone (& row . 1) ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"flat_map (| row : (_ , _ ,) | row . 1 . into_iter () . map (move | __flattened_element | (:: std :: clone :: Clone :: clone (& row . 0) , __flattened_element ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":12,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":12,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"source_reader_0\",\"version\":1},{\"value\":\"source_reader_0\",\"version\":1},{\"value\":\"source_reader_0\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let mut sg_1v1_node_7v1_stream = {
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__expr_lhs@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__expr_lhs@datalog_program.snap
index ac8f39e24ca..489b4715358 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__expr_lhs@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__expr_lhs@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"tee ()\"},\"version\":1},{\"value\":{\"Operator\":\"union ()\"},\"version\":1},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"source_stream (ints)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | ((123 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | ((row . 0 + 123 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | ((row . 0 . clone () + row . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | ((123 - row . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | ((123 % (row . 0 + 5) ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | ((row . 0 * 5 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 ,))\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":3,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":4,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":6,\"version\":3},{\"idx\":9,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":1,\"version\":3},{\"idx\":11,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":4,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":6,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":12,\"version\":1},{\"idx\":4,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":1,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":4,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":21,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":16,\"version\":1},{\"idx\":4,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":22,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":18,\"version\":1},{\"idx\":4,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":23,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":20,\"version\":1},{\"idx\":4,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":19,\"version\":1},{\"idx\":20,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":24,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":21,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":22,\"version\":1},{\"idx\":15,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":23,\"version\":1},{\"idx\":17,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":24,\"version\":1},{\"idx\":19,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[{\"Int\":\"0\"},\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[{\"Int\":\"1\"},\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"2\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[{\"Int\":\"2\"},\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"3\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[{\"Int\":\"3\"},\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"4\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[{\"Int\":\"4\"},\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"5\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[{\"Int\":\"5\"},\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":3,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":12,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":15,\"version\":1},{\"idx\":16,\"version\":1},{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1},{\"idx\":19,\"version\":1},{\"idx\":20,\"version\":1},{\"idx\":4,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints_insert\",\"version\":1},{\"value\":\"ints\",\"version\":1},{\"value\":\"result_insert\",\"version\":1},{\"value\":\"result_insert\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"tee ()\"},\"version\":1},{\"value\":{\"Operator\":\"union ()\"},\"version\":1},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"source_stream (ints)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | ((123 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | ((row . 0 + 123 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | ((row . 0 . clone () + row . 0 ,) , 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             );
             df.__assign_diagnostics("[]");
             let (hoff_1v3_send, hoff_1v3_recv) = df
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__expr_predicate@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__expr_predicate@datalog_program.snap
index 332537cff23..727e37d835a 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__expr_predicate@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__expr_predicate@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
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+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"tee ()\"},\"version\":1},{\"value\":{\"Operator\":\"union ()\"},\"version\":1},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"source_stream (ints)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"filter (| row : & (_ ,) | row . 0 == 0)\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | ((1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"filter (| row : & (_ ,) | row . 0 != 0)\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | ((2 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g 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,))\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":3,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":4,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":6,\"version\":3},{\"idx\":10,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":1,\"version\":3},{\"idx\":13,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":4,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":6,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":4,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":12,\"version\":1},{\"idx\":1,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":15,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":17,\"version\":1},{\"idx\":4,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":16,\"version\":1},{\"idx\":17,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":21,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":18,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":20,\"version\":1},{\"idx\":4,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":19,\"version\":1},{\"idx\":20,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":18,\"version\":1},{\"idx\":22,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":21,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":22,\"version\":1},{\"idx\":19,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[{\"Int\":\"0\"},\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[{\"Int\":\"1\"},\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[{\"Int\":\"2\"},\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"2\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[{\"Int\":\"3\"},\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"3\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":16,\"version\":1},{\"idx\":17,\"version\":1},{\"idx\":19,\"version\":1},{\"idx\":20,\"version\":1},{\"idx\":4,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":3,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":12,\"version\":1},{\"idx\":15,\"version\":1},{\"idx\":18,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints_insert\",\"version\":1},{\"value\":\"ints\",\"version\":1},{\"value\":\"result_insert\",\"version\":1},{\"value\":\"result_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"predicate_1_filter\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"predicate_3_filter\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"predicate_5_filter\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"predicate_7_filter\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let (hoff_1v3_send, hoff_1v3_recv) = df
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__flat_then_detuple@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__flat_then_detuple@datalog_program.snap
index 24271d1ac77..365bc739364 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__flat_then_detuple@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__flat_then_detuple@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (ints1)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"flat_map (| row : (_ ,) | row . 0 . into_iter () . map (move | __flattened_element | (__flattened_element ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row_untuple : (_ ,) | (row_untuple . 0 . 0 , row_untuple . 0 . 1 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":12,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":12,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"source_reader_0\",\"version\":1},{\"value\":\"source_reader_0\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (ints1)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"flat_map (| row : (_ ,) | row . 0 . into_iter () . map (move | __flattened_element | (__flattened_element ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row_untuple : (_ ,) | (row_untuple . 0 . 0 , row_untuple . 0 . 1 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":12,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":12,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"source_reader_0\",\"version\":1},{\"value\":\"source_reader_0\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let mut sg_1v1_node_7v1_stream = {
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__flatten@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__flatten@datalog_program.snap
index bdff7ff96c9..2311470ada9 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__flatten@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__flatten@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (ints1)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"flat_map (| row : (_ , _ ,) | row . 1 . into_iter () . map (move | __flattened_element | (:: std :: clone :: Clone :: clone (& row . 0) , __flattened_element ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"source_reader_0\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (ints1)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"flat_map (| row : (_ , _ ,) | row . 1 . into_iter () . map (move | __flattened_element | (:: std :: clone :: Clone :: clone (& row . 0) , __flattened_element ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"source_reader_0\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let mut sg_1v1_node_7v1_stream = {
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__index@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__index@datalog_program.snap
index e08e994e7fc..6b205a468ee 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__index@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__index@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"tee ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"difference :: < 'tick , 'static > ()\"},\"version\":1},{\"value\":{\"Operator\":\"tee ()\"},\"version\":1},{\"value\":{\"Operator\":\"defer_tick ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"difference :: < 'tick , 'static > ()\"},\"version\":1},{\"value\":{\"Operator\":\"tee ()\"},\"version\":1},{\"value\":{\"Operator\":\"defer_tick ()\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (ints)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result2 . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result3 . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result4 . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"persist :: < 'static > ()\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result5 . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"enumerate :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (__enumerate_index , (g , a)) : (_ , ((_ , _ ,) , _)) | (g . 0 , g . 1 , __enumerate_index ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 ,) , ((row . 1) ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"fold_keyed :: < 'tick , (_ ,) , (Option < _ > ,) > (| | (None ,) , | old : & mut (Option < _ > ,) , val : (_ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some ({ let prev : (dfir_rs :: rustc_hash :: FxHashSet < _ > , _) = prev ; let mut set : dfir_rs :: rustc_hash :: FxHashSet < _ > = prev . 0 ; if set . insert (val . 0) { (set , prev . 1 + 1) } else { (set , prev . 1) } }) } else { Some ({ let mut set = dfir_rs :: rustc_hash :: FxHashSet :: < _ > :: default () ; set . insert (val . 0) ; (set , 1) }) } ; })\"},\"version\":1},{\"value\":{\"Operator\":\"enumerate :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (__enumerate_index , (g , a)) : (_ , ((_ ,) , _)) | (g . 0 , a . 0 . unwrap () . 1 , __enumerate_index ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"enumerate :: < 'static > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (__enumerate_index , (g , a)) : (_ , ((_ , _ ,) , _)) | (g . 0 , g . 1 , __enumerate_index ,))\"},\"version\":1},{\"value\":{\"Operator\":\"persist :: < 'static > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 ,) , ((row . 1) ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"fold_keyed :: < 'static , (_ ,) , (Option < _ > ,) > (| | (None ,) , | old : & mut (Option < _ > ,) , val : (_ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some ({ let prev : (dfir_rs :: rustc_hash :: FxHashSet < _ > , _) = prev ; let mut set : dfir_rs :: rustc_hash :: FxHashSet < _ > = prev . 0 ; if set . insert (val . 0) { (set , prev . 1 + 1) } else { (set , prev . 1) } }) } else { Some ({ let mut set = dfir_rs :: rustc_hash :: FxHashSet :: < _ > :: default () ; set . insert (val . 0) ; (set , 1) }) } ; })\"},\"version\":1},{\"value\":{\"Operator\":\"enumerate :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (__enumerate_index , (g , a)) : (_ , ((_ ,) , _)) | (g . 0 , a . 0 . unwrap () . 1 , __enumerate_index ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"enumerate :: < 'static > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (__enumerate_index , (g , a)) : 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,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":26,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":3,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":35,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":6,\"version\":3},{\"idx\":25,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":39,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":9,\"version\":3},{\"idx\":23,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":45,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":12,\"version\":3},{\"idx\":20,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":49,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":15,\"version\":3},{\"idx\":18,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":52,\"version\":1},{\"idx\":17,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":18,\"version\":1},{\"idx\":19,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":20,\"version\":1},{\"idx\":15,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":19,\"version\":1},{\"idx\":12,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":41,\"version\":1},{\"idx\":22,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":23,\"version\":1},{\"idx\":24,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":22,\"version\":1},{\"idx\":23,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":25,\"version\":1},{\"idx\":9,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":24,\"version\":1},{\"idx\":6,\"version\":3}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":27,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":8,\"version\":1},{\"idx\":28,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":29,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":30,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":31,\"version\":1},{\"idx\":32,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":19,\"version\":1},{\"idx\":31,\"version\":1}],\"version\":1},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":34,\"version\":1},{\"idx\":35,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":33,\"version\":1},{\"idx\":34,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":33,\"version\":1}],\"version\":1},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":38,\"version\":1},{\"idx\":39,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":37,\"version\":1},{\"idx\":38,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":36,\"version\":1},{\"idx\":21,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":36,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":21,\"version\":3},{\"idx\":37,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":40,\"version\":1},{\"idx\":16,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":40,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":10,\"version\":3},{\"idx\":51,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":44,\"version\":1},{\"idx\":45,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":43,\"version\":1},{\"idx\":44,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":42,\"version\":1},{\"idx\":43,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":24,\"version\":1},{\"idx\":42,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":13,\"version\":3},{\"idx\":47,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":48,\"version\":1},{\"idx\":49,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":47,\"version\":1},{\"idx\":48,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":46,\"version\":1},{\"idx\":13,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":24,\"version\":1},{\"idx\":46,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":16,\"version\":3},{\"idx\":41,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":51,\"version\":1},{\"idx\":52,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":50,\"version\":1},{\"idx\":10,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":24,\"version\":1},{\"idx\":50,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Path\":\"neg\"}],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Path\":\"neg\"}],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Path\":\"pos\"}],\"ve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             );
             df.__assign_diagnostics("[]");
             let (hoff_6v3_send, hoff_6v3_recv) = df
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__join_with_other@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__join_with_other@datalog_program.snap
index 07146036595..a9934040bfe 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__join_with_other@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__join_with_other@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
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()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 1 , _v . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":18,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":8,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":15,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":16,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":17,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":15,\"version\":1},{\"idx\":16,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1},{\"idx\":8,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"in1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"in2_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_2\",\"version\":1},{\"value\":\"join_2\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (in1)\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (in2)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | out . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"join :: < 'tick , 'tick , dfir_rs :: compiled :: pull :: HalfMultisetJoinState > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ , _ ,) , (() , ())) | (kv . 0 . 0 , kv . 0 . 1 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 0 , _v . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 1 , _v . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":18,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":8,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":15,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":16,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":17,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":15,\"version\":1},{\"idx\":16,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1},{\"idx\":8,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"in1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"in2_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_2\",\"version\":1},{\"value\":\"join_2\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let mut sg_1v1_node_10v1_stream = {
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__join_with_self@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__join_with_self@datalog_program.snap
index 5c117735069..f7e29207f2b 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__join_with_self@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__join_with_self@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"tee ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"source_stream (input)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | out . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"join :: < 'tick , 'tick , dfir_rs :: compiled :: pull :: HalfMultisetJoinState > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ , _ ,) , (() , ())) | (kv . 0 . 0 , kv . 0 . 1 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 0 , _v . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 1 , _v . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":3,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":6,\"version\":3},{\"idx\":11,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":6,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":12,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":4,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":4,\"version\":3},{\"idx\":12,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[{\"Int\":\"0\"},\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[{\"Int\":\"1\"},\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":3,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":12,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"input_insert\",\"version\":1},{\"value\":\"input\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_2\",\"version\":1},{\"value\":\"join_2\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"tee ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"source_stream (input)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | out . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"join :: < 'tick , 'tick , dfir_rs :: compiled :: pull :: HalfMultisetJoinState > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ , _ ,) , (() , ())) | (kv . 0 . 0 , kv . 0 . 1 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 0 , _v . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 1 , _v . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":3,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":6,\"version\":3},{\"idx\":11,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":6,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":12,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":4,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":4,\"version\":3},{\"idx\":12,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[{\"Int\":\"0\"},\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[{\"Int\":\"1\"},\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":3,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":12,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"input_insert\",\"version\":1},{\"value\":\"input\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_2\",\"version\":1},{\"value\":\"join_2\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let (hoff_4v3_send, hoff_4v3_recv) = df
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__local_constraints@datalog_program-2.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__local_constraints@datalog_program-2.snap
index c83997d98b2..3645cca4485 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__local_constraints@datalog_program-2.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__local_constraints@datalog_program-2.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (input)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | out . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"filter (| row : & (_ , _ , _ , _ ,) | row . 0 == row . 1 && row . 2 == row . 3)\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ , _ , _ ,) | ((row . 0 . clone () , row . 0 , row . 2 . clone () , row . 2 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ , _ , _ ,) , _) | (g . 0 , g . 1 , g . 2 , g . 3 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"input_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"source_reader_0\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (input)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | out . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"filter (| row : & (_ , _ , _ , _ ,) | row . 0 == row . 1 && row . 2 == row . 3)\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ , _ , _ ,) | ((row . 0 . clone () , row . 0 , row . 2 . clone () , row . 2 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ , _ , _ ,) , _) | (g . 0 , g . 1 , g . 2 , g . 3 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"input_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"source_reader_0\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let mut sg_1v1_node_7v1_stream = {
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__local_constraints@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__local_constraints@datalog_program.snap
index f4074971246..41c8093c53b 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__local_constraints@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__local_constraints@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (input)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | out . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"filter (| row : & (_ , _ ,) | row . 0 == row . 1)\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 . clone () , row . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"input_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"source_reader_0\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (input)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | out . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"filter (| row : & (_ , _ ,) | row . 0 == row . 1)\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 . clone () , row . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"input_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"source_reader_0\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let mut sg_1v1_node_7v1_stream = {
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__max@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__max@datalog_program.snap
index 94e324f4db2..67af74127ed 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__max@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__max@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"source_stream (ints)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 1 ,) , (row . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"fold_keyed :: < 'tick , (_ ,) , (Option < _ > ,) > (| | (None ,) , | old : & mut (Option < _ > ,) , val : (_ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some (std :: cmp :: max (prev , val . 0)) } else { Some (val . 0) } ; })\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (a . 0 . unwrap () , g . 0 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":6,\"version\":3},{\"idx\":10,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":6,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":1,\"version\":1},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"source_stream (ints)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 1 ,) , (row . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"fold_keyed :: < 'tick , (_ ,) , (Option < _ > ,) > (| | (None ,) , | old : & mut (Option < _ > ,) , val : (_ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some (std :: cmp :: max (prev , val . 0)) } else { Some (val . 0) } ; })\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (a . 0 . unwrap () , g . 0 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":6,\"version\":3},{\"idx\":10,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":6,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":1,\"version\":1},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let (hoff_6v3_send, hoff_6v3_recv) = df
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__max_all@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__max_all@datalog_program.snap
index 291d1b48c3a..aefb3f7a561 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__max_all@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__max_all@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"source_stream (ints)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | (() , (row . 0 , row . 1 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"fold_keyed :: < 'tick , () , (Option < _ > , Option < _ > ,) > (| | (None , None ,) , | old : & mut (Option < _ > , Option < _ > ,) , val : (_ , _ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some (std :: cmp :: max (prev , val . 0)) } else { Some (val . 0) } ; old . 1 = if let Some (prev) = old . 1 . take () { Some (std :: cmp :: max (prev , val . 1)) } else { Some (val . 1) } ; })\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : (() , _) | (a . 0 . unwrap () , a . 1 . unwrap () ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":6,\"version\":3},{\"idx\":10,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":6,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":1,\"version\":1},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"source_stream (ints)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | (() , (row . 0 , row . 1 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"fold_keyed :: < 'tick , () , (Option < _ > , Option < _ > ,) > (| | (None , None ,) , | old : & mut (Option < _ > , Option < _ > ,) , val : (_ , _ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some (std :: cmp :: max (prev , val . 0)) } else { Some (val . 0) } ; old . 1 = if let Some (prev) = old . 1 . take () { Some (std :: cmp :: max (prev , val . 1)) } else { Some (val . 1) } ; })\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : (() , _) | (a . 0 . unwrap () , a . 1 . unwrap () ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":6,\"version\":3},{\"idx\":10,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":6,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":1,\"version\":1},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let (hoff_6v3_send, hoff_6v3_recv) = df
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__minimal_program@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__minimal_program@datalog_program.snap
index 5c00c8626c5..1c2823f04d3 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__minimal_program@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__minimal_program@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (input)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | out . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 1 , row . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"input_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (input)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | out . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 1 , row . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"input_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let mut sg_1v1_node_7v1_stream = {
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__multi_detuple@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__multi_detuple@datalog_program.snap
index 6d91a3b8570..84df859acda 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__multi_detuple@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__multi_detuple@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (ints1)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row_untuple : (_ , _ ,) | (row_untuple . 0 . 0 , row_untuple . 0 . 1 , row_untuple . 1 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row_untuple : (_ , _ , _ ,) | (row_untuple . 0 , row_untuple . 1 , row_untuple . 2 . 0 , row_untuple . 2 . 1 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ , _ , _ ,) | ((row . 0 , row . 1 , row . 2 , row . 3 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ , _ , _ ,) , _) | (g . 0 , g . 1 , g . 2 , g . 3 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":12,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":12,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"source_reader_0\",\"version\":1},{\"value\":\"source_reader_0\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (ints1)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row_untuple : (_ , _ ,) | (row_untuple . 0 . 0 , row_untuple . 0 . 1 , row_untuple . 1 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row_untuple : (_ , _ , _ ,) | (row_untuple . 0 , row_untuple . 1 , row_untuple . 2 . 0 , row_untuple . 2 . 1 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ , _ , _ ,) | ((row . 0 , row . 1 , row . 2 , row . 3 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ , _ , _ ,) , _) | (g . 0 , g . 1 , g . 2 , g . 3 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":12,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":12,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"source_reader_0\",\"version\":1},{\"value\":\"source_reader_0\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let mut sg_1v1_node_7v1_stream = {
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__multiple_contributors@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__multiple_contributors@datalog_program.snap
index 91a476436ba..00f8040ffcb 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__multiple_contributors@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__multiple_contributors@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"union ()\"},\"version\":1},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (in1)\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (in2)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | out . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 1 , row . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":8,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":7,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":16,\"version\":1},{\"idx\":7,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":15,\"version\":1}],\"version\":3}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":15,\"version\":1},{\"idx\":16,\"version\":1},{\"idx\":7,\"version\":1},{\"idx\":8,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"in1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"in2_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1},{\"value\":\"out_insert\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"union ()\"},\"version\":1},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (in1)\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (in2)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | out . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 1 , row . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":8,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":7,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":16,\"version\":1},{\"idx\":7,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":15,\"version\":1}],\"version\":3}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":15,\"version\":1},{\"idx\":16,\"version\":1},{\"idx\":7,\"version\":1},{\"idx\":8,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"in1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"in2_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1},{\"value\":\"out_insert\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let mut sg_1v1_node_10v1_stream = {
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__non_copy_but_clone@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__non_copy_but_clone@datalog_program.snap
index d2cb16f0aab..c41b29bdb80 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__non_copy_but_clone@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__non_copy_but_clone@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (strings)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | ((row . 0 . clone () , row . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"strings_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (strings)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | ((row . 0 . clone () , row . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"strings_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let mut sg_1v1_node_7v1_stream = {
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__persist@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__persist@datalog_program.snap
index 5dbfaafe8bc..7ea137127d6 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__persist@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__persist@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"difference :: < 'tick , 'static > ()\"},\"version\":1},{\"value\":{\"Operator\":\"tee ()\"},\"version\":1},{\"value\":{\"Operator\":\"defer_tick ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"difference :: < 'tick , 'static > ()\"},\"version\":1},{\"value\":{\"Operator\":\"tee ()\"},\"version\":1},{\"value\":{\"Operator\":\"defer_tick ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"difference :: < 'tick , 'static > ()\"},\"version\":1},{\"value\":{\"Operator\":\"tee ()\"},\"version\":1},{\"value\":{\"Operator\":\"defer_tick ()\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (ints1)\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (ints2)\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (ints3)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result2 . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result3 . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result4 . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"join :: < 'static , 'static , dfir_rs :: compiled :: pull :: HalfMultisetJoinState > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : (() , ((_ ,) , (_ ,))) | (kv . 1 . 0 . 0 , kv . 1 . 1 . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ ,) | (() , (_v . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ ,) | (() , (_v . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"join :: < 'static , 'tick , dfir_rs :: compiled :: pull :: HalfMultisetJoinState > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : (() , ((_ , _ ,) , (_ ,))) | (kv . 1 . 0 . 0 , kv . 1 . 0 . 1 , kv . 1 . 1 . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | (() , (_v . 0 , _v . 1 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ ,) | (() , (_v . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ , _ ,) | ((row . 0 , row . 1 , row . 2 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ , _ ,) , _) | (g . 0 , g . 1 , g . 2 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"anti_join ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ ,) , ()) | (kv . 0 . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"persist :: < 'static > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ ,) | ((_v . 0 ,) , 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             );
             df.__assign_diagnostics("[]");
             let (hoff_6v3_send, hoff_6v3_recv) = df
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__persist_uniqueness@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__persist_uniqueness@datalog_program.snap
index d8f3ed23268..c9364a78bbd 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__persist_uniqueness@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__persist_uniqueness@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
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,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | (() , ((row . 0) ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"fold_keyed :: < 'static , () , (Option < _ > ,) > (| | (None ,) , | old : & mut (Option < _ > ,) , val : (_ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some ({ let prev : (dfir_rs :: rustc_hash :: FxHashSet < _ > , _) = prev ; let mut set : dfir_rs :: rustc_hash :: FxHashSet < _ > = prev . 0 ; if set . insert (val . 0) { (set , prev . 1 + 1) } else { (set , prev . 1) } }) } else { Some ({ let mut set = dfir_rs :: rustc_hash :: FxHashSet :: < _ > :: default () ; set . insert (val . 0) ; (set , 1) }) } ; })\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : (() , _) | (a . 0 . unwrap () . 1 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":4,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":3,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":11,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":4,\"version\":1},{\"idx\":8,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":12,\"version\":1},{\"idx\":6,\"version\":3}],\"version\":5},{\"value\":[{\"idx\":8,\"version\":3},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":18,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":11,\"version\":3},{\"idx\":3,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":6,\"version\":3},{\"idx\":7,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":15,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":9,\"version\":3},{\"idx\":17,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":16,\"version\":1},{\"idx\":9,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":4,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Path\":\"pos\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":5},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Path\":\"neg\"}],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[{\"Int\":\"0\"},\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":3,\"version\":1},\"version\":1},{\"value\":{\"idx\":3,\"version\":1},\"version\":1},{\"value\":{\"idx\":3,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":3,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":4,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":3,\"version\":1},\"version\":1},{\"value\":{\"idx\":3,\"version\":1},\"version\":1},{\"value\":{\"idx\":3,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":5,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":15,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":3,\"version\":1},{\"idx\":4,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":12,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1},{\"value\":2,\"version\":1},{\"value\":1,\"version\":1},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints1_insert\",\"version\":1},{\"value\":\"ints1\",\"version\":1},{\"value\":\"ints1\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,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+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"difference :: < 'tick , 'static > ()\"},\"version\":1},{\"value\":{\"Operator\":\"tee ()\"},\"version\":1},{\"value\":{\"Operator\":\"defer_tick ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"source_stream (ints2)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | ((row . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | (() , ((row . 0) ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"fold_keyed :: < 'static , () , (Option < _ > ,) > (| | (None ,) , | old : & mut (Option < _ > ,) , val : (_ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some ({ let prev : (dfir_rs :: rustc_hash :: FxHashSet < _ > , _) = prev ; let mut set : dfir_rs :: rustc_hash :: FxHashSet < _ > = prev . 0 ; if set . insert (val . 0) { (set , prev . 1 + 1) } else { (set , prev . 1) } }) } else { Some ({ let mut set = dfir_rs :: rustc_hash :: FxHashSet :: < _ > :: default () ; set . insert (val . 0) ; (set , 1) }) } ; })\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : (() , _) | (a . 0 . unwrap () . 1 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":4,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":3,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":11,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":4,\"version\":1},{\"idx\":8,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":12,\"version\":1},{\"idx\":6,\"version\":3}],\"version\":5},{\"value\":[{\"idx\":8,\"version\":3},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":18,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":11,\"version\":3},{\"idx\":3,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":6,\"version\":3},{\"idx\":7,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":15,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":9,\"version\":3},{\"idx\":17,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":16,\"version\":1},{\"idx\":9,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":4,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Path\":\"pos\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":5},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Path\":\"neg\"}],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[{\"Int\":\"0\"},\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":3,\"version\":1},\"version\":1},{\"value\":{\"idx\":3,\"version\":1},\"version\":1},{\"value\":{\"idx\":3,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":3,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":4,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":3,\"version\":1},\"version\":1},{\"value\":{\"idx\":3,\"version\":1},\"version\":1},{\"value\":{\"idx\":3,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":5,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":15,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":3,\"version\":1},{\"idx\":4,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":12,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1},{\"value\":2,\"version\":1},{\"value\":1,\"version\":1},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints1_insert\",\"version\":1},{\"value\":\"ints1\",\"version\":1},{\"value\":\"ints1\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints2_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let (hoff_6v3_send, hoff_6v3_recv) = df
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__send_to_node@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__send_to_node@datalog_program.snap
index bc5d98cf1a2..fb12a943cbf 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__send_to_node@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__send_to_node@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
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+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (ints)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| (node , data) | async_send_result (node , data))\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (async_receive_result)\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| v : (_ , _ ,) | (v . 1 , (v . 0 ,)))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":12,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":15,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":3}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":12,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":15,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"ints_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"result_async_send\",\"version\":1},{\"value\":\"result_async_send\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let mut sg_1v1_node_12v1_stream = {
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__simple_filter@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__simple_filter@datalog_program.snap
index 2a3e9b6c7df..0c0ba681723 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__simple_filter@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__simple_filter@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (input)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | out . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"filter (| row : & (_ , _ ,) | row . 0 > row . 1 && row . 1 == row . 0)\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"input_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"predicate_1_filter\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (input)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | out . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"filter (| row : & (_ , _ ,) | row . 0 > row . 1 && row . 1 == row . 0)\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 0 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ ,) , _) | (g . 0 , g . 1 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"input_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"predicate_1_filter\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let mut sg_1v1_node_7v1_stream = {
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__single_column_program@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__single_column_program@datalog_program.snap
index fd468dae3c7..dc5d9964958 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__single_column_program@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__single_column_program@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (in1)\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (in2)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | out . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"join :: < 'tick , 'tick , dfir_rs :: compiled :: pull :: HalfMultisetJoinState > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ ,) , (() , ())) | (kv . 0 . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ ,) | ((_v . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ ,) | ((_v . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | ((row . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":18,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":8,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":15,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":16,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":17,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":15,\"version\":1},{\"idx\":16,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1},{\"idx\":8,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"in1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"in2_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_2\",\"version\":1},{\"value\":\"join_2\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (in1)\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (in2)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | out . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"join :: < 'tick , 'tick , dfir_rs :: compiled :: pull :: HalfMultisetJoinState > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ ,) , (() , ())) | (kv . 0 . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ ,) | ((_v . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ ,) | ((_v . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | ((row . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":18,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":8,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":15,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":16,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":17,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":15,\"version\":1},{\"idx\":16,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1},{\"idx\":8,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"in1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"in2_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_2\",\"version\":1},{\"value\":\"join_2\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let mut sg_1v1_node_10v1_stream = {
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__transitive_closure@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__transitive_closure@datalog_program.snap
index 865c463c36f..cb8c161fa4d 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__transitive_closure@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__transitive_closure@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"union ()\"},\"version\":1},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"tee ()\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (edges)\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (seed_reachable)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | reachable . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | ((row . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"join :: < 'tick , 'tick , dfir_rs :: compiled :: pull :: HalfMultisetJoinState > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ ,) , (() , (_ ,))) | (kv . 0 . 0 , kv . 1 . 1 . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ ,) | ((_v . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 0 ,) , (_v . 1 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":6,\"version\":3},{\"idx\":17,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":8,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":7,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":17,\"version\":1},{\"idx\":15,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":6,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":18,\"version\":1},{\"idx\":15,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":18,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":20,\"version\":1},{\"idx\":7,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":19,\"version\":1},{\"idx\":20,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":16,\"version\":1},{\"idx\":19,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[{\"Int\":\"0\"},\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[{\"Int\":\"1\"},\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1},{\"idx\":15,\"version\":1},{\"idx\":16,\"version\":1},{\"idx\":19,\"version\":1},{\"idx\":20,\"version\":1},{\"idx\":7,\"version\":1},{\"idx\":8,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"edges_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"seed_reachable_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":\"reachable_insert\",\"version\":1},{\"value\":\"reachable_insert\",\"version\":1},{\"value\":\"reachable\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_3\",\"version\":1},{\"value\":\"join_3\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"union ()\"},\"version\":1},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"tee ()\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (edges)\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (seed_reachable)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | reachable . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ ,) | ((row . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"join :: < 'tick , 'tick , dfir_rs :: compiled :: pull :: HalfMultisetJoinState > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ ,) , (() , (_ ,))) | (kv . 0 . 0 , kv . 1 . 1 . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ ,) | ((_v . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 0 ,) , (_v . 1 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | ((row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":6,\"version\":3},{\"idx\":17,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":8,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":7,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":17,\"version\":1},{\"idx\":15,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":6,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":18,\"version\":1},{\"idx\":15,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":18,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":20,\"version\":1},{\"idx\":7,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":19,\"version\":1},{\"idx\":20,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":16,\"version\":1},{\"idx\":19,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[{\"Int\":\"0\"},\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[{\"Int\":\"1\"},\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1},{\"idx\":15,\"version\":1},{\"idx\":16,\"version\":1},{\"idx\":19,\"version\":1},{\"idx\":20,\"version\":1},{\"idx\":7,\"version\":1},{\"idx\":8,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":12,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"edges_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"seed_reachable_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":\"reachable_insert\",\"version\":1},{\"value\":\"reachable_insert\",\"version\":1},{\"value\":\"reachable\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_3\",\"version\":1},{\"value\":\"join_3\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let (hoff_6v3_send, hoff_6v3_recv) = df
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__triple_relation_join@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__triple_relation_join@datalog_program.snap
index 2c940efb462..42c2fd1d4d5 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__triple_relation_join@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__triple_relation_join@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
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()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ ,) , ((_ ,) , (_ ,))) | (kv . 0 . 0 , kv . 1 . 0 . 0 , kv . 1 . 1 . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 1 ,) , (_v . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 0 ,) , (_v . 1 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"join :: < 'tick , 'tick , dfir_rs :: compiled :: pull :: HalfMultisetJoinState > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ ,) , ((_ , _ ,) , (_ ,))) | (kv . 0 . 0 , kv . 1 . 0 . 0 , kv . 1 . 0 . 1 , kv . 1 . 1 . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ , _ ,) | ((_v . 2 ,) , (_v . 1 , _v . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 0 ,) , (_v . 1 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ , _ , _ ,) | ((row . 3 , row . 0 , row . 2 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ , _ , _ ,) , _) | (g . 0 , g . 1 , g . 2 , g . 3 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":26,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":19,\"version\":1},{\"idx\":17,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":19,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":20,\"version\":1},{\"idx\":17,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":20,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":21,\"version\":1},{\"idx\":22,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":23,\"version\":1},{\"idx\":21,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":18,\"version\":1},{\"idx\":23,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":24,\"version\":1},{\"idx\":21,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":8,\"version\":1},{\"idx\":24,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":25,\"version\":1},{\"idx\":26,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":22,\"version\":1},{\"idx\":25,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":15,\"version\":1},{\"idx\":8,\"version\":1},{\"idx\":19,\"version\":1},{\"idx\":20,\"version\":1},{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1},{\"idx\":23,\"version\":1},{\"idx\":24,\"version\":1},{\"idx\":21,\"version\":1},{\"idx\":22,\"version\":1},{\"idx\":25,\"version\":1},{\"idx\":26,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"in1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"in2_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"in3_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_2\",\"version\":1},{\"value\":\"join_2\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_4\",\"version\":1},{\"value\":\"join_4\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"source_stream (in1)\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (in2)\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (in3)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | out . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"join :: < 'tick , 'tick , dfir_rs :: compiled :: pull :: HalfMultisetJoinState > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ ,) , ((_ ,) , (_ ,))) | (kv . 0 . 0 , kv . 1 . 0 . 0 , kv . 1 . 1 . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 1 ,) , (_v . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 0 ,) , (_v . 1 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"join :: < 'tick , 'tick , dfir_rs :: compiled :: pull :: HalfMultisetJoinState > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ ,) , ((_ , _ ,) , (_ ,))) | (kv . 0 . 0 , kv . 1 . 0 . 0 , kv . 1 . 0 . 1 , kv . 1 . 1 . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ , _ ,) | ((_v . 2 ,) , (_v . 1 , _v . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 0 ,) , (_v . 1 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ , _ , _ ,) | ((row . 3 , row . 0 , row . 2 , row . 1 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ , _ , _ , _ ,) , _) | (g . 0 , g . 1 , g . 2 , g . 3 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":15,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":26,\"version\":1},{\"idx\":11,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":19,\"version\":1},{\"idx\":17,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":19,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":20,\"version\":1},{\"idx\":17,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":20,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":21,\"version\":1},{\"idx\":22,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":23,\"version\":1},{\"idx\":21,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":18,\"version\":1},{\"idx\":23,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":24,\"version\":1},{\"idx\":21,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":8,\"version\":1},{\"idx\":24,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":25,\"version\":1},{\"idx\":26,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":22,\"version\":1},{\"idx\":25,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":15,\"version\":1},{\"idx\":8,\"version\":1},{\"idx\":19,\"version\":1},{\"idx\":20,\"version\":1},{\"idx\":17,\"version\":1},{\"idx\":18,\"version\":1},{\"idx\":23,\"version\":1},{\"idx\":24,\"version\":1},{\"idx\":21,\"version\":1},{\"idx\":22,\"version\":1},{\"idx\":25,\"version\":1},{\"idx\":26,\"version\":1},{\"idx\":11,\"version\":1},{\"idx\":16,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"in1_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"in2_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"in3_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_2\",\"version\":1},{\"value\":\"join_2\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_4\",\"version\":1},{\"value\":\"join_4\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let mut sg_1v1_node_13v1_stream = {
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__wildcard_fields@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__wildcard_fields@datalog_program.snap
index 52e622554c2..cb28fa81503 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__wildcard_fields@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__wildcard_fields@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
-                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"tee ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"source_stream (input)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | out . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"join :: < 'tick , 'tick , dfir_rs :: compiled :: pull :: HalfMultisetJoinState > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ ,) , ((_ ,) , (_ ,))) | (kv . 0 . 0 , kv . 1 . 0 . 0 , kv . 1 . 1 . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 0 ,) , (_v . 1 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 1 ,) , (_v . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ , _ ,) | ((row . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 ,))\"},\"version\":1}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":3,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":6,\"version\":3},{\"idx\":11,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":6,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":12,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":4,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":4,\"version\":3},{\"idx\":12,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[{\"Int\":\"0\"},\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[{\"Int\":\"1\"},\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":3,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":12,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"input_insert\",\"version\":1},{\"value\":\"input\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_2\",\"version\":1},{\"value\":\"join_2\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":2},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"tee ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"source_stream (input)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | out . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"join :: < 'tick , 'tick , dfir_rs :: compiled :: pull :: HalfMultisetJoinState > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ ,) , ((_ ,) , (_ ,))) | (kv . 0 . 0 , kv . 1 . 0 . 0 , kv . 1 . 1 . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 0 ,) , (_v . 1 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 1 ,) , (_v . 0 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ , _ ,) | ((row . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : ((_ ,) , _) | (g . 0 ,))\"},\"version\":1}],\"operator_tag\":[{\"value\":null,\"version\":0}],\"graph\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":2,\"version\":1},{\"idx\":3,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":14,\"version\":1},{\"idx\":5,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":6,\"version\":3},{\"idx\":11,\"version\":1}],\"version\":3},{\"value\":null,\"version\":2},{\"value\":[{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":6,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":12,\"version\":1},{\"idx\":9,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":3,\"version\":1},{\"idx\":4,\"version\":3}],\"version\":3},{\"value\":[{\"idx\":4,\"version\":3},{\"idx\":12,\"version\":1}],\"version\":3},{\"value\":[{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":10,\"version\":1},{\"idx\":13,\"version\":1}],\"version\":1}],\"ports\":[{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":null,\"version\":0},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",{\"Int\":\"0\"}],\"version\":1},{\"value\":[{\"Int\":\"0\"},\"Elided\"],\"version\":3},{\"value\":[\"Elided\",{\"Int\":\"1\"}],\"version\":1},{\"value\":[{\"Int\":\"1\"},\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":3},{\"value\":[\"Elided\",\"Elided\"],\"version\":1},{\"value\":[\"Elided\",\"Elided\"],\"version\":1}],\"node_loops\":[{\"value\":null,\"version\":0}],\"loop_nodes\":[{\"value\":null,\"version\":0}],\"loop_parent\":[{\"value\":null,\"version\":0}],\"loop_children\":[{\"value\":null,\"version\":0}],\"node_subgraph\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":null,\"version\":0},{\"value\":{\"idx\":1,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1},{\"value\":{\"idx\":2,\"version\":1},\"version\":1}],\"subgraph_nodes\":[{\"value\":null,\"version\":0},{\"value\":[{\"idx\":7,\"version\":1},{\"idx\":2,\"version\":1},{\"idx\":3,\"version\":1}],\"version\":1},{\"value\":[{\"idx\":11,\"version\":1},{\"idx\":12,\"version\":1},{\"idx\":9,\"version\":1},{\"idx\":10,\"version\":1},{\"idx\":13,\"version\":1},{\"idx\":14,\"version\":1},{\"idx\":5,\"version\":1},{\"idx\":8,\"version\":1}],\"version\":1}],\"subgraph_stratum\":[{\"value\":null,\"version\":0},{\"value\":0,\"version\":1},{\"value\":0,\"version\":1}],\"node_singleton_references\":[{\"value\":null,\"version\":0},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1},{\"value\":[],\"version\":1}],\"node_varnames\":[{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"input_insert\",\"version\":1},{\"value\":\"input\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":\"out_insert\",\"version\":1},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":null,\"version\":0},{\"value\":\"join_2\",\"version\":1},{\"value\":\"join_2\",\"version\":1}],\"subgraph_laziness\":[{\"value\":null,\"version\":0}]}",
             );
             df.__assign_diagnostics("[]");
             let (hoff_4v3_send, hoff_4v3_recv) = df
diff --git a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__wildcard_join_count@datalog_program.snap b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__wildcard_join_count@datalog_program.snap
index 59672f4d953..b6d60175f85 100644
--- a/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__wildcard_join_count@datalog_program.snap
+++ b/dfir_datalog_core/src/snapshots/dfir_datalog_core__tests__wildcard_join_count@datalog_program.snap
@@ -9,7 +9,7 @@ fn main() {
             use hydroflow::{var_expr, var_args};
             let mut df = hydroflow::scheduled::graph::Dfir::new();
             df.__assign_meta_graph(
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())\"},\"version\":1},{\"value\":{\"Operator\":\"join :: < 'tick , 'tick , dfir_rs :: compiled :: pull :: HalfMultisetJoinState > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ ,) , ((_ ,) , ())) | (kv . 0 . 0 , kv . 1 . 0 . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 0 ,) , (_v . 1 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ ,) | ((_v . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | (() , (() ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"fold_keyed :: < 'tick , () , (Option < _ > ,) > (| | (None ,) , | old : & mut (Option < _ > ,) , val : (_ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some (prev + 1) } else { Some (1) } ; })\"},\"version\":1},{\"value\":{\"Operator\":\"map (| (g , a) : (() , _) | (a . 0 . unwrap () ,))\"},\"version\":1},{\"value\":{\"Operator\":\"join :: < 'tick , 'tick , dfir_rs :: compiled :: pull :: HalfMultisetJoinState > ()\"},\"version\":1},{\"value\":{\"Operator\":\"map (| kv : ((_ ,) , ((_ ,) , ())) | (kv . 0 . 0 , kv . 1 . 0 . 0 ,))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ , _ ,) | ((_v . 0 ,) , (_v . 1 ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| _v : (_ ,) | ((_v . 0 ,) , ()))\"},\"version\":1},{\"value\":{\"Operator\":\"map (| row : (_ , _ ,) | (() , ((row . 0) ,)))\"},\"version\":1},{\"value\":{\"Operator\":\"fold_keyed :: < 'tick , () , (Option < _ > ,) > (| | (None ,) , | old : & mut (Option < _ > ,) , val : (_ ,) | { old . 0 = if let Some (prev) = old . 0 . take () { Some ({ let prev : (dfir_rs :: rustc_hash :: FxHashSet < _ > , _) = prev ; let mut set : dfir_rs :: rustc_hash :: FxHashSet < _ > = prev . 0 ; if set . insert (val . 0) { (set , prev . 1 + 1) } else { (set , prev . 1) } }) } else { Some ({ let mut set = dfir_rs :: rustc_hash :: FxHashSet :: < _ > :: default () ; set . insert (val . 0) ; (set , 1) }) } ; 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+                "{\"nodes\":[{\"value\":null,\"version\":0},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"tee ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Operator\":\"tee ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"unique :: < 'tick > ()\"},\"version\":1},{\"value\":{\"Handoff\":{}},\"version\":3},{\"value\":{\"Operator\":\"source_stream (ints1)\"},\"version\":1},{\"value\":{\"Operator\":\"source_stream (ints2)\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result . send (v) . unwrap ())\"},\"version\":1},{\"value\":{\"Operator\":\"for_each (| v | result2 . send (v) . unwrap 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             );
             df.__assign_diagnostics("[]");
             let (hoff_1v3_send, hoff_1v3_recv) = df
diff --git a/dfir_lang/src/graph/flat_graph_builder.rs b/dfir_lang/src/graph/flat_graph_builder.rs
index c08861b22b7..54e03d76817 100644
--- a/dfir_lang/src/graph/flat_graph_builder.rs
+++ b/dfir_lang/src/graph/flat_graph_builder.rs
@@ -60,7 +60,7 @@ pub struct FlatGraphBuilder {
     /// Spanned error/warning/etc diagnostics to emit.
     diagnostics: Vec<Diagnostic>,
 
-    /// HydroflowGraph being built.
+    /// [`DfirGraph`] being built.
     flat_graph: DfirGraph,
     /// Variable names, used as [`HfStatement::Named`] are added.
     varname_ends: BTreeMap<Ident, VarnameInfo>,
@@ -84,38 +84,53 @@ impl FlatGraphBuilder {
     /// Convert the Hydroflow code AST into a graph builder.
     pub fn from_hfcode(input: HfCode) -> Self {
         let mut builder = Self::default();
-        builder.process_statements(input.statements);
+        builder.add_dfir(input, None, None);
         builder
     }
 
-    fn process_statements(&mut self, statements: impl IntoIterator<Item = HfStatement>) {
-        for stmt in statements {
-            self.add_statement(stmt);
-        }
-    }
-
     /// Build into an unpartitioned [`DfirGraph`], returning a tuple of a `HydroflowGraph` and
     /// any diagnostics.
     ///
     /// Even if there are errors, the `HydroflowGraph` will be returned (potentially in a invalid
     /// state). Does not call `emit` on any diagnostics.
     pub fn build(mut self) -> (DfirGraph, Vec<ItemUse>, Vec<Diagnostic>) {
-        self.connect_operator_links();
+        self.finalize_connect_operator_links();
         self.process_operator_errors();
 
         (self.flat_graph, self.uses, self.diagnostics)
     }
 
+    /// Adds all [`HfStatement`]s within the [`HfCode`] to this `HydroflowGraph`.
+    ///
+    /// Optional configuration:
+    /// * In the given loop context `current_loop`.
+    /// * With the given operator tag `operator_tag`.
+    pub fn add_dfir(
+        &mut self,
+        dfir: HfCode,
+        current_loop: Option<GraphLoopId>,
+        operator_tag: Option<&str>,
+    ) {
+        for stmt in dfir.statements {
+            self.add_statement_internal(stmt, current_loop, operator_tag);
+        }
+    }
+
     /// Add a single [`HfStatement`] line to this `HydroflowGraph` in the root context.
     pub fn add_statement(&mut self, stmt: HfStatement) {
-        self.add_statement_with_loop(stmt, None)
+        self.add_statement_internal(stmt, None, None);
     }
 
-    /// Add a single [`HfStatement`] line to this `HydroflowGraph` in the given loop context.
-    pub fn add_statement_with_loop(
+    /// Add a single [`HfStatement`] line to this `HydroflowGraph` with given configuration.
+    ///
+    /// Optional configuration:
+    /// * In the given loop context `current_loop`.
+    /// * With the given operator tag `operator_tag`.
+    fn add_statement_internal(
         &mut self,
         stmt: HfStatement,
         current_loop: Option<GraphLoopId>,
+        operator_tag: Option<&str>,
     ) {
         match stmt {
             HfStatement::Use(yuse) => {
@@ -123,61 +138,125 @@ impl FlatGraphBuilder {
             }
             HfStatement::Named(named) => {
                 let stmt_span = named.span();
-                let ends = self.add_pipeline(named.pipeline, Some(&named.name), current_loop);
-                match self.varname_ends.entry(named.name) {
-                    Entry::Vacant(vacant_entry) => {
-                        vacant_entry.insert(VarnameInfo::new(ends));
-                    }
-                    Entry::Occupied(occupied_entry) => {
-                        let prev_conflict = occupied_entry.key();
-                        self.diagnostics.push(Diagnostic::spanned(
-                            prev_conflict.span(),
-                            Level::Error,
-                            format!(
-                                "Existing assignment to `{}` conflicts with later assignment: {} (1/2)",
-                                prev_conflict,
-                                PrettySpan(stmt_span),
-                            ),
-                        ));
-                        self.diagnostics.push(Diagnostic::spanned(
-                            stmt_span,
-                            Level::Error,
-                            format!(
-                                "Name assignment to `{}` conflicts with existing assignment: {} (2/2)",
-                                prev_conflict,
-                                PrettySpan(prev_conflict.span())
-                            ),
-                        ));
-                    }
-                }
+                let ends = self.add_pipeline(
+                    named.pipeline,
+                    Some(&named.name),
+                    current_loop,
+                    operator_tag,
+                );
+                self.assign_varname_checked(named.name, stmt_span, ends);
             }
             HfStatement::Pipeline(pipeline_stmt) => {
-                let ends = self.add_pipeline(pipeline_stmt.pipeline, None, current_loop);
+                let ends =
+                    self.add_pipeline(pipeline_stmt.pipeline, None, current_loop, operator_tag);
                 Self::helper_check_unused_port(&mut self.diagnostics, &ends, true);
                 Self::helper_check_unused_port(&mut self.diagnostics, &ends, false);
             }
             HfStatement::Loop(loop_statement) => {
                 let inner_loop = self.flat_graph.insert_loop(current_loop);
                 for stmt in loop_statement.statements {
-                    self.add_statement_with_loop(stmt, Some(inner_loop));
+                    self.add_statement_internal(stmt, Some(inner_loop), operator_tag);
                 }
             }
         }
     }
 
-    /// Helper: Add a pipeline, i.e. `a -> b -> c`. Return the input and output ends for it.
+    /// Programatically add an pipeline, optionally adding `pred_name` as a single predecessor and
+    /// assigning it all to `asgn_name`.
+    ///
+    /// In DFIR syntax, equivalent to [`Self::add_statement`] of (if all names are supplied):
+    /// ```text
+    /// #asgn_name = #pred_name -> #pipeline;
+    /// ```
+    ///
+    /// But with, optionally:
+    /// * A `current_loop` to put the operator in.
+    /// * An `operator_tag` to tag the operator with, for debugging/tracing.
+    pub fn append_assign_pipeline(
+        &mut self,
+        asgn_name: Option<&Ident>,
+        pred_name: Option<&Ident>,
+        pipeline: Pipeline,
+        current_loop: Option<GraphLoopId>,
+        operator_tag: Option<&str>,
+    ) {
+        let span = pipeline.span();
+        let mut ends = self.add_pipeline(pipeline, asgn_name, current_loop, operator_tag);
+
+        // Connect `pred_name` if supplied.
+        if let Some(pred_name) = pred_name {
+            if let Some(pred_varname_info) = self.varname_ends.get(pred_name) {
+                // Update ends for `asgn_name`.
+                ends = self.connect_ends(pred_varname_info.ends.clone(), ends);
+            } else {
+                self.diagnostics.push(Diagnostic::spanned(
+                    pred_name.span(),
+                    Level::Error,
+                    format!(
+                        "Cannot find referenced name `{}`; name was never assigned.",
+                        pred_name
+                    ),
+                ));
+            }
+        }
+
+        // Assign `asgn_name` if supplied.
+        if let Some(asgn_name) = asgn_name {
+            self.assign_varname_checked(asgn_name.clone(), span, ends);
+        }
+    }
+}
+
+/// Internal methods.
+impl FlatGraphBuilder {
+    /// Assign a variable name to a pipeline, checking for conflicts.
+    fn assign_varname_checked(&mut self, name: Ident, stmt_span: Span, ends: Ends) {
+        match self.varname_ends.entry(name) {
+            Entry::Vacant(vacant_entry) => {
+                vacant_entry.insert(VarnameInfo::new(ends));
+            }
+            Entry::Occupied(occupied_entry) => {
+                let prev_conflict = occupied_entry.key();
+                self.diagnostics.push(Diagnostic::spanned(
+                    prev_conflict.span(),
+                    Level::Error,
+                    format!(
+                        "Existing assignment to `{}` conflicts with later assignment: {} (1/2)",
+                        prev_conflict,
+                        PrettySpan(stmt_span),
+                    ),
+                ));
+                self.diagnostics.push(Diagnostic::spanned(
+                    stmt_span,
+                    Level::Error,
+                    format!(
+                        "Name assignment to `{}` conflicts with existing assignment: {} (2/2)",
+                        prev_conflict,
+                        PrettySpan(prev_conflict.span())
+                    ),
+                ));
+            }
+        }
+    }
+
+    /// Helper: Add a pipeline, i.e. `a -> b -> c`. Return the input and output [`Ends`] for it.
     fn add_pipeline(
         &mut self,
         pipeline: Pipeline,
         current_varname: Option<&Ident>,
         current_loop: Option<GraphLoopId>,
+        operator_tag: Option<&str>,
     ) -> Ends {
         match pipeline {
             Pipeline::Paren(ported_pipeline_paren) => {
                 let (inn_port, pipeline_paren, out_port) =
                     PortIndexValue::from_ported(ported_pipeline_paren);
-                let og_ends =
-                    self.add_pipeline(*pipeline_paren.pipeline, current_varname, current_loop);
+                let og_ends = self.add_pipeline(
+                    *pipeline_paren.pipeline,
+                    current_varname,
+                    current_loop,
+                    operator_tag,
+                );
                 Self::helper_combine_ends(&mut self.diagnostics, og_ends, inn_port, out_port)
             }
             Pipeline::Name(pipeline_name) => {
@@ -215,47 +294,88 @@ impl FlatGraphBuilder {
             }
             Pipeline::Link(pipeline_link) => {
                 // Add the nested LHS and RHS of this link.
-                let lhs_ends = self.add_pipeline(*pipeline_link.lhs, current_varname, current_loop);
-                let rhs_ends = self.add_pipeline(*pipeline_link.rhs, current_varname, current_loop);
+                let lhs_ends = self.add_pipeline(
+                    *pipeline_link.lhs,
+                    current_varname,
+                    current_loop,
+                    operator_tag,
+                );
+                let rhs_ends = self.add_pipeline(
+                    *pipeline_link.rhs,
+                    current_varname,
+                    current_loop,
+                    operator_tag,
+                );
 
-                // Outer (first and last) ends.
-                let outer_ends = Ends {
-                    inn: lhs_ends.inn,
-                    out: rhs_ends.out,
-                };
-                // Inner (link) ends.
-                let link_ends = Ends {
-                    out: lhs_ends.out,
-                    inn: rhs_ends.inn,
-                };
-                self.links.push(link_ends);
-                outer_ends
+                self.connect_ends(lhs_ends, rhs_ends)
             }
             Pipeline::Operator(operator) => {
                 let op_span = Some(operator.span());
-                let nid = self.flat_graph.insert_node(
-                    GraphNode::Operator(operator),
-                    current_varname.cloned(),
-                    current_loop,
-                );
-                Ends {
-                    inn: Some((PortIndexValue::Elided(op_span), GraphDet::Determined(nid))),
-                    out: Some((PortIndexValue::Elided(op_span), GraphDet::Determined(nid))),
+                let (node_id, ends) =
+                    self.add_operator(current_varname, current_loop, operator, op_span);
+                if let Some(operator_tag) = operator_tag {
+                    self.flat_graph
+                        .set_operator_tag(node_id, operator_tag.to_owned());
                 }
+                ends
             }
         }
     }
 
+    /// Connects two [`Ends`] together. Returns the outer [`Ends`] for the connection.
+    ///
+    /// Links the inner ends together by adding it to `self.links`.
+    fn connect_ends(&mut self, lhs_ends: Ends, rhs_ends: Ends) -> Ends {
+        // Outer (first and last) ends.
+        let outer_ends = Ends {
+            inn: lhs_ends.inn,
+            out: rhs_ends.out,
+        };
+        // Inner (link) ends.
+        let link_ends = Ends {
+            out: lhs_ends.out,
+            inn: rhs_ends.inn,
+        };
+        self.links.push(link_ends);
+        outer_ends
+    }
+
+    /// Adds an operator to the graph, returning its [`GraphNodeId`] the input and output [`Ends`] for it.
+    fn add_operator(
+        &mut self,
+        current_varname: Option<&Ident>,
+        current_loop: Option<GraphLoopId>,
+        operator: Operator,
+        op_span: Option<Span>,
+    ) -> (GraphNodeId, Ends) {
+        let node_id = self.flat_graph.insert_node(
+            GraphNode::Operator(operator),
+            current_varname.cloned(),
+            current_loop,
+        );
+        let ends = Ends {
+            inn: Some((
+                PortIndexValue::Elided(op_span),
+                GraphDet::Determined(node_id),
+            )),
+            out: Some((
+                PortIndexValue::Elided(op_span),
+                GraphDet::Determined(node_id),
+            )),
+        };
+        (node_id, ends)
+    }
+
     /// Connects operator links as a final building step. Processes all the links stored in
     /// `self.links` and actually puts them into the graph.
-    fn connect_operator_links(&mut self) {
+    fn finalize_connect_operator_links(&mut self) {
         // `->` edges
         for Ends { out, inn } in std::mem::take(&mut self.links) {
             let out_opt = self.helper_resolve_name(out, false);
             let inn_opt = self.helper_resolve_name(inn, true);
             // `None` already have errors in `self.diagnostics`.
             if let (Some((out_port, out_node)), Some((inn_port, inn_node))) = (out_opt, inn_opt) {
-                let _ = self.connect_operators(out_port, out_node, inn_port, inn_node);
+                let _ = self.finalize_connect_operators(out_port, out_node, inn_port, inn_node);
             }
         }
 
@@ -379,7 +499,7 @@ impl FlatGraphBuilder {
     }
 
     /// Connect two operators on the given port indexes.
-    fn connect_operators(
+    fn finalize_connect_operators(
         &mut self,
         src_port: PortIndexValue,
         src: GraphNodeId,
diff --git a/dfir_lang/src/graph/hydroflow_graph.rs b/dfir_lang/src/graph/hydroflow_graph.rs
index c955f40e470..5a6d55ade4a 100644
--- a/dfir_lang/src/graph/hydroflow_graph.rs
+++ b/dfir_lang/src/graph/hydroflow_graph.rs
@@ -45,6 +45,8 @@ pub struct DfirGraph {
     /// This field will be empty after deserialization.
     #[serde(skip)]
     operator_instances: SecondaryMap<GraphNodeId, OperatorInstance>,
+    /// Debugging/tracing tag for each operator node.
+    operator_tag: SecondaryMap<GraphNodeId, String>,
     /// Graph data structure (two-way adjacency list).
     graph: DiMulGraph<GraphNodeId, GraphEdgeId>,
     /// Input and output port for each edge.
@@ -463,6 +465,11 @@ impl DfirGraph {
             (_many, _to_many) => Some(Color::Comp),
         }
     }
+
+    /// Set the operator tag (for debugging/tracing).
+    pub fn set_operator_tag(&mut self, node_id: GraphNodeId, tag: String) {
+        self.operator_tag.insert(node_id, tag.to_owned());
+    }
 }
 
 /// Singleton references.
@@ -1012,7 +1019,11 @@ impl DfirGraph {
                                     not(nightly),
                                     expect(unused_labels, reason = "conditional compilation")
                                 )]
-                                let source_info = 'a: {
+                                let source_tag = 'a: {
+                                    if let Some(tag) = self.operator_tag.get(node_id).cloned() {
+                                        break 'a tag;
+                                    }
+
                                     #[cfg(nightly)]
                                     if proc_macro::is_available() {
                                         let op_span = op_span.unwrap();
@@ -1044,7 +1055,7 @@ impl DfirGraph {
                                     "{}__{}__{}",
                                     ident,
                                     op_name,
-                                    source_info,
+                                    source_tag,
                                     span = op_span
                                 );
                                 let type_guard = if is_pull {
diff --git a/hydro_lang/src/ir.rs b/hydro_lang/src/ir.rs
index adada879126..b3d0cfc48af 100644
--- a/hydro_lang/src/ir.rs
+++ b/hydro_lang/src/ir.rs
@@ -13,6 +13,8 @@ use dfir_lang::graph::FlatGraphBuilder;
 #[cfg(feature = "build")]
 use proc_macro2::Span;
 use proc_macro2::TokenStream;
+#[cfg(feature = "build")]
+use quote::quote;
 use quote::ToTokens;
 #[cfg(feature = "build")]
 use syn::parse_quote;
@@ -196,9 +198,13 @@ impl HydroLeaf {
                 graph_builders
                     .entry(input_location_id)
                     .or_default()
-                    .add_statement(parse_quote! {
-                        #input_ident -> for_each(#f);
-                    });
+                    .add_dfir(
+                        parse_quote! {
+                            #input_ident -> for_each(#f);
+                        },
+                        None,
+                        None,
+                    );
             }
 
             HydroLeaf::DestSink { sink, input } => {
@@ -208,9 +214,13 @@ impl HydroLeaf {
                 graph_builders
                     .entry(input_location_id)
                     .or_default()
-                    .add_statement(parse_quote! {
-                        #input_ident -> dest_sink(#sink);
-                    });
+                    .add_dfir(
+                        parse_quote! {
+                            #input_ident -> dest_sink(#sink);
+                        },
+                        None,
+                        None,
+                    );
             }
 
             HydroLeaf::CycleSink {
@@ -233,12 +243,13 @@ impl HydroLeaf {
                     "cycle_sink location mismatch"
                 );
 
-                graph_builders
-                    .entry(*location_id)
-                    .or_default()
-                    .add_statement(parse_quote! {
+                graph_builders.entry(*location_id).or_default().add_dfir(
+                    parse_quote! {
                         #ident = #input_ident;
-                    });
+                    },
+                    None,
+                    None,
+                );
             }
         }
     }
@@ -667,9 +678,13 @@ impl<'a> HydroNode {
                     syn::Ident::new(&format!("stream_{}", persist_id), Span::call_site());
 
                 let builder = graph_builders.entry(location).or_default();
-                builder.add_statement(parse_quote! {
-                    #persist_ident = #inner_ident -> persist::<'static>();
-                });
+                builder.add_dfir(
+                    parse_quote! {
+                        #persist_ident = #inner_ident -> persist::<'static>();
+                    },
+                    None,
+                    None,
+                );
 
                 (persist_ident, location)
             }
@@ -688,9 +703,13 @@ impl<'a> HydroNode {
                     syn::Ident::new(&format!("stream_{}", delta_id), Span::call_site());
 
                 let builder = graph_builders.entry(location).or_default();
-                builder.add_statement(parse_quote! {
-                    #delta_ident = #inner_ident -> multiset_delta();
-                });
+                builder.add_dfir(
+                    parse_quote! {
+                        #delta_ident = #inner_ident -> multiset_delta();
+                    },
+                    None,
+                    None,
+                );
 
                 (delta_ident, location)
             }
@@ -740,10 +759,11 @@ impl<'a> HydroNode {
                         }
                     };
 
-                    graph_builders
-                        .entry(*location_id)
-                        .or_default()
-                        .add_statement(source_stmt);
+                    graph_builders.entry(*location_id).or_default().add_dfir(
+                        source_stmt,
+                        None,
+                        None,
+                    );
 
                     (source_ident, *location_id)
                 }
@@ -782,9 +802,13 @@ impl<'a> HydroNode {
                         syn::Ident::new(&format!("stream_{}", tee_id), Span::call_site());
 
                     let builder = graph_builders.entry(inner_location_id).or_default();
-                    builder.add_statement(parse_quote! {
-                        #tee_ident = #inner_ident -> tee();
-                    });
+                    builder.add_dfir(
+                        parse_quote! {
+                            #tee_ident = #inner_ident -> tee();
+                        },
+                        None,
+                        None,
+                    );
 
                     built_tees.insert(
                         inner.0.as_ref() as *const RefCell<HydroNode>,
@@ -813,17 +837,15 @@ impl<'a> HydroNode {
                     syn::Ident::new(&format!("stream_{}", union_id), Span::call_site());
 
                 let builder = graph_builders.entry(first_location_id).or_default();
-                builder.add_statement(parse_quote! {
-                    #chain_ident = chain();
-                });
-
-                builder.add_statement(parse_quote! {
-                    #first_ident -> [0]#chain_ident;
-                });
-
-                builder.add_statement(parse_quote! {
-                    #second_ident -> [1]#chain_ident;
-                });
+                builder.add_dfir(
+                    parse_quote! {
+                        #chain_ident = chain();
+                        #first_ident -> [0]#chain_ident;
+                        #second_ident -> [1]#chain_ident;
+                    },
+                    None,
+                    None,
+                );
 
                 (chain_ident, first_location_id)
             }
@@ -846,17 +868,15 @@ impl<'a> HydroNode {
                     syn::Ident::new(&format!("stream_{}", union_id), Span::call_site());
 
                 let builder = graph_builders.entry(left_location_id).or_default();
-                builder.add_statement(parse_quote! {
-                    #cross_ident = cross_singleton();
-                });
-
-                builder.add_statement(parse_quote! {
-                    #left_ident -> [input]#cross_ident;
-                });
-
-                builder.add_statement(parse_quote! {
-                    #right_ident -> [single]#cross_ident;
-                });
+                builder.add_dfir(
+                    parse_quote! {
+                        #cross_ident = cross_singleton();
+                        #left_ident -> [input]#cross_ident;
+                        #right_ident -> [single]#cross_ident;
+                    },
+                    None,
+                    None,
+                );
 
                 (cross_ident, left_location_id)
             }
@@ -874,18 +894,18 @@ impl<'a> HydroNode {
                     unreachable!()
                 };
 
-                let (left_inner, left_was_persist) =
+                let (left_inner, left_lifetime) =
                     if let HydroNode::Persist { inner: left, .. } = left.as_ref() {
-                        (left, true)
+                        (left, quote!('static))
                     } else {
-                        (left, false)
+                        (left, quote!('tick))
                     };
 
-                let (right_inner, right_was_persist) =
+                let (right_inner, right_lifetime) =
                     if let HydroNode::Persist { inner: right, .. } = right.as_ref() {
-                        (right, true)
+                        (right, quote!('static))
                     } else {
-                        (right, false)
+                        (right, quote!('tick))
                     };
 
                 let (left_ident, left_location_id) =
@@ -906,36 +926,15 @@ impl<'a> HydroNode {
 
                 let builder = graph_builders.entry(left_location_id).or_default();
 
-                match (left_was_persist, right_was_persist) {
-                    (true, true) => {
-                        builder.add_statement(parse_quote! {
-                            #stream_ident = #operator::<'static, 'static>();
-                        });
-                    }
-                    (true, false) => {
-                        builder.add_statement(parse_quote! {
-                            #stream_ident = #operator::<'static, 'tick>();
-                        });
-                    }
-                    (false, true) => {
-                        builder.add_statement(parse_quote! {
-                            #stream_ident = #operator::<'tick, 'static>();
-                        });
-                    }
-                    (false, false) => {
-                        builder.add_statement(parse_quote! {
-                            #stream_ident = #operator::<'tick, 'tick>();
-                        });
-                    }
-                };
-
-                builder.add_statement(parse_quote! {
-                    #left_ident -> [0]#stream_ident;
-                });
-
-                builder.add_statement(parse_quote! {
-                    #right_ident -> [1]#stream_ident;
-                });
+                builder.add_dfir(
+                    parse_quote! {
+                        #stream_ident = #operator::<#left_lifetime, #right_lifetime>();
+                        #left_ident -> [0]#stream_ident;
+                        #right_ident -> [1]#stream_ident;
+                    },
+                    None,
+                    None,
+                );
 
                 (stream_ident, left_location_id)
             }
@@ -953,11 +952,11 @@ impl<'a> HydroNode {
                     unreachable!()
                 };
 
-                let (neg, neg_was_persist) =
+                let (neg, neg_lifetime) =
                     if let HydroNode::Persist { inner: neg, .. } = neg.as_ref() {
-                        (neg, true)
+                        (neg, quote!('static))
                     } else {
-                        (neg, false)
+                        (neg, quote!('tick))
                     };
 
                 let (pos_ident, pos_location_id) =
@@ -978,23 +977,15 @@ impl<'a> HydroNode {
 
                 let builder = graph_builders.entry(pos_location_id).or_default();
 
-                if neg_was_persist {
-                    builder.add_statement(parse_quote! {
-                        #stream_ident = #operator::<'tick, 'static>();
-                    });
-                } else {
-                    builder.add_statement(parse_quote! {
-                        #stream_ident = #operator::<'tick, 'tick>();
-                    });
-                }
-
-                builder.add_statement(parse_quote! {
-                    #pos_ident -> [pos]#stream_ident;
-                });
-
-                builder.add_statement(parse_quote! {
-                    #neg_ident -> [neg]#stream_ident;
-                });
+                builder.add_dfir(
+                    parse_quote! {
+                        #stream_ident = #operator::<'tick, #neg_lifetime>();
+                        #pos_ident -> [pos]#stream_ident;
+                        #neg_ident -> [neg]#stream_ident;
+                    },
+                    None,
+                    None,
+                );
 
                 (stream_ident, pos_location_id)
             }
@@ -1009,9 +1000,13 @@ impl<'a> HydroNode {
                 let map_ident = syn::Ident::new(&format!("stream_{}", map_id), Span::call_site());
 
                 let builder = graph_builders.entry(input_location_id).or_default();
-                builder.add_statement(parse_quote! {
-                    #map_ident = #input_ident -> map(#f);
-                });
+                builder.add_dfir(
+                    parse_quote! {
+                        #map_ident = #input_ident -> map(#f);
+                    },
+                    None,
+                    None,
+                );
 
                 (map_ident, input_location_id)
             }
@@ -1027,9 +1022,13 @@ impl<'a> HydroNode {
                     syn::Ident::new(&format!("stream_{}", flat_map_id), Span::call_site());
 
                 let builder = graph_builders.entry(input_location_id).or_default();
-                builder.add_statement(parse_quote! {
-                    #flat_map_ident = #input_ident -> flat_map(#f);
-                });
+                builder.add_dfir(
+                    parse_quote! {
+                        #flat_map_ident = #input_ident -> flat_map(#f);
+                    },
+                    None,
+                    None,
+                );
 
                 (flat_map_ident, input_location_id)
             }
@@ -1045,9 +1044,13 @@ impl<'a> HydroNode {
                     syn::Ident::new(&format!("stream_{}", filter_id), Span::call_site());
 
                 let builder = graph_builders.entry(input_location_id).or_default();
-                builder.add_statement(parse_quote! {
-                    #filter_ident = #input_ident -> filter(#f);
-                });
+                builder.add_dfir(
+                    parse_quote! {
+                        #filter_ident = #input_ident -> filter(#f);
+                    },
+                    None,
+                    None,
+                );
 
                 (filter_ident, input_location_id)
             }
@@ -1063,9 +1066,13 @@ impl<'a> HydroNode {
                     syn::Ident::new(&format!("stream_{}", filter_map_id), Span::call_site());
 
                 let builder = graph_builders.entry(input_location_id).or_default();
-                builder.add_statement(parse_quote! {
-                    #filter_map_ident = #input_ident -> filter_map(#f);
-                });
+                builder.add_dfir(
+                    parse_quote! {
+                        #filter_map_ident = #input_ident -> filter_map(#f);
+                    },
+                    None,
+                    None,
+                );
 
                 (filter_map_ident, input_location_id)
             }
@@ -1080,9 +1087,13 @@ impl<'a> HydroNode {
                 let sort_ident = syn::Ident::new(&format!("stream_{}", sort_id), Span::call_site());
 
                 let builder = graph_builders.entry(input_location_id).or_default();
-                builder.add_statement(parse_quote! {
-                    #sort_ident = #input_ident -> sort();
-                });
+                builder.add_dfir(
+                    parse_quote! {
+                        #sort_ident = #input_ident -> sort();
+                    },
+                    None,
+                    None,
+                );
 
                 (sort_ident, input_location_id)
             }
@@ -1098,9 +1109,13 @@ impl<'a> HydroNode {
                     syn::Ident::new(&format!("stream_{}", defer_tick_id), Span::call_site());
 
                 let builder = graph_builders.entry(input_location_id).or_default();
-                builder.add_statement(parse_quote! {
-                    #defer_tick_ident = #input_ident -> defer_tick_lazy();
-                });
+                builder.add_dfir(
+                    parse_quote! {
+                        #defer_tick_ident = #input_ident -> defer_tick_lazy();
+                    },
+                    None,
+                    None,
+                );
 
                 (defer_tick_ident, input_location_id)
             }
@@ -1119,15 +1134,18 @@ impl<'a> HydroNode {
 
                 let builder = graph_builders.entry(input_location_id).or_default();
 
-                if *is_static {
-                    builder.add_statement(parse_quote! {
-                        #enumerate_ident = #input_ident -> enumerate::<'static>();
-                    });
+                let lifetime = if *is_static {
+                    quote!('static)
                 } else {
-                    builder.add_statement(parse_quote! {
-                        #enumerate_ident = #input_ident -> enumerate::<'tick>();
-                    });
-                }
+                    quote!('tick)
+                };
+                builder.add_dfir(
+                    parse_quote! {
+                        #enumerate_ident = #input_ident -> enumerate::<#lifetime>();
+                    },
+                    None,
+                    None,
+                );
 
                 (enumerate_ident, input_location_id)
             }
@@ -1143,9 +1161,13 @@ impl<'a> HydroNode {
                     syn::Ident::new(&format!("stream_{}", inspect_id), Span::call_site());
 
                 let builder = graph_builders.entry(input_location_id).or_default();
-                builder.add_statement(parse_quote! {
-                    #inspect_ident = #input_ident -> inspect(#f);
-                });
+                builder.add_dfir(
+                    parse_quote! {
+                        #inspect_ident = #input_ident -> inspect(#f);
+                    },
+                    None,
+                    None,
+                );
 
                 (inspect_ident, input_location_id)
             }
@@ -1161,9 +1183,13 @@ impl<'a> HydroNode {
                     syn::Ident::new(&format!("stream_{}", unique_id), Span::call_site());
 
                 let builder = graph_builders.entry(input_location_id).or_default();
-                builder.add_statement(parse_quote! {
-                    #unique_ident = #input_ident -> unique::<'tick>();
-                });
+                builder.add_dfir(
+                    parse_quote! {
+                        #unique_ident = #input_ident -> unique::<'tick>();
+                    },
+                    None,
+                    None,
+                );
 
                 (unique_ident, input_location_id)
             }
@@ -1185,11 +1211,11 @@ impl<'a> HydroNode {
                     unreachable!()
                 };
 
-                let (input, input_was_persist) =
+                let (input, lifetime) =
                     if let HydroNode::Persist { inner: input, .. } = input.as_ref() {
-                        (input, true)
+                        (input, quote!('static))
                     } else {
-                        (input, false)
+                        (input, quote!('tick))
                     };
 
                 let (input_ident, input_location_id) =
@@ -1202,15 +1228,13 @@ impl<'a> HydroNode {
                     syn::Ident::new(&format!("stream_{}", reduce_id), Span::call_site());
 
                 let builder = graph_builders.entry(input_location_id).or_default();
-                if input_was_persist {
-                    builder.add_statement(parse_quote! {
-                        #fold_ident = #input_ident -> #operator::<'static>(#init, #acc);
-                    });
-                } else {
-                    builder.add_statement(parse_quote! {
-                        #fold_ident = #input_ident -> #operator::<'tick>(#init, #acc);
-                    });
-                }
+                builder.add_dfir(
+                    parse_quote! {
+                        #fold_ident = #input_ident -> #operator::<#lifetime>(#init, #acc);
+                    },
+                    None,
+                    None,
+                );
 
                 (fold_ident, input_location_id)
             }
@@ -1228,11 +1252,11 @@ impl<'a> HydroNode {
                     unreachable!()
                 };
 
-                let (input, input_was_persist) =
+                let (input, lifetime) =
                     if let HydroNode::Persist { inner: input, .. } = input.as_ref() {
-                        (input, true)
+                        (input, quote!('static))
                     } else {
-                        (input, false)
+                        (input, quote!('tick))
                     };
 
                 let (input_ident, input_location_id) =
@@ -1245,15 +1269,13 @@ impl<'a> HydroNode {
                     syn::Ident::new(&format!("stream_{}", reduce_id), Span::call_site());
 
                 let builder = graph_builders.entry(input_location_id).or_default();
-                if input_was_persist {
-                    builder.add_statement(parse_quote! {
-                        #reduce_ident = #input_ident -> #operator::<'static>(#f);
-                    });
-                } else {
-                    builder.add_statement(parse_quote! {
-                        #reduce_ident = #input_ident -> #operator::<'tick>(#f);
-                    });
-                }
+                builder.add_dfir(
+                    parse_quote! {
+                        #reduce_ident = #input_ident -> #operator::<#lifetime>(#f);
+                    },
+                    None,
+                    None,
+                );
 
                 (reduce_ident, input_location_id)
             }
@@ -1285,13 +1307,21 @@ impl<'a> HydroNode {
                 let sender_builder = graph_builders.entry(input_location_id).or_default();
 
                 if let Some(serialize_pipeline) = serialize_pipeline {
-                    sender_builder.add_statement(parse_quote! {
-                        #input_ident -> map(#serialize_pipeline) -> dest_sink(#sink_expr);
-                    });
+                    sender_builder.add_dfir(
+                        parse_quote! {
+                            #input_ident -> map(#serialize_pipeline) -> dest_sink(#sink_expr);
+                        },
+                        None,
+                        None,
+                    );
                 } else {
-                    sender_builder.add_statement(parse_quote! {
-                        #input_ident -> dest_sink(#sink_expr);
-                    });
+                    sender_builder.add_dfir(
+                        parse_quote! {
+                            #input_ident -> dest_sink(#sink_expr);
+                        },
+                        None,
+                        None,
+                    );
                 }
 
                 let to_id = match to_location {
@@ -1309,13 +1339,17 @@ impl<'a> HydroNode {
                     syn::Ident::new(&format!("stream_{}", receiver_stream_id), Span::call_site());
 
                 if let Some(deserialize_pipeline) = deserialize_pipeline {
-                    receiver_builder.add_statement(parse_quote! {
+                    receiver_builder.add_dfir(parse_quote! {
                         #receiver_stream_ident = source_stream(#source_expr) -> map(#deserialize_pipeline);
-                    });
+                    }, None, None);
                 } else {
-                    receiver_builder.add_statement(parse_quote! {
-                        #receiver_stream_ident = source_stream(#source_expr);
-                    });
+                    receiver_builder.add_dfir(
+                        parse_quote! {
+                            #receiver_stream_ident = source_stream(#source_expr);
+                        },
+                        None,
+                        None,
+                    );
                 }
 
                 (receiver_stream_ident, *to_id)