diff --git a/CLAUDE.md b/CLAUDE.md
index b7ad1a1a..933c55ec 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -60,6 +60,7 @@ The rest of the modernization plan: `devdocs/modernization/ROADMAP.md`.
 - Dependency changes: back-end packages only, and only with John's approval (the port that updated them all is done). No front-end dependency changes (Node is pinned at 12.22.9 because of `fibers`).
 - Do not add `[ApiController]` to controllers that lack it. It changes model binding and error responses on routes deployed clients call.
 - No new features.
+- Low-level server fixes (`util`, `generator`, `ControllerHelpers`, `DataList`, startup): check whether Sockeye needs the same fix with `..\sockeye\devdocs\compare-with-raven.sh` (names mapped in `NAME-MAP.md` there), and record the answer.
 - Git: keep it simple and explicit. Do not push, tag, merge or rewrite history unless asked. Tags are annotated and pushed by name.
 - Nothing is accepted blindly: show the diff and say why.
 - Secrets and customer data never go in a repo. Fixtures that contain customer data live outside the repo and are found through an environment variable.