From 2e95b7199ffbf6036d3d027e00e7e8c7ad088e63 Mon Sep 17 00:00:00 2001
From: v4hn <me@v4hn.de>
Date: Sat, 12 Oct 2024 14:51:49 +0200
Subject: [PATCH] add todo for rebuild on changes

---
 README.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/README.md b/README.md
index a958cab09a..87db5d6043 100644
--- a/README.md
+++ b/README.md
@@ -69,6 +69,9 @@ The packages built here rely on Debian packages of ROS core infrastructure [[0](
 
 ### Internals
 
+- optionally only build packages and downstream when they have changed upstream since the last build
+  Debian sid needs to be rebuild in full every time, but stable distributions keep API/ABI compatibility.
+
 - record build times 
   - use them in task-to-worker assignment