diff --git a/AGENTS.md b/AGENTS.md
index 600e064..3cc4078 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -187,6 +187,6 @@ KDE integration is part of this repository under `kde/`. Build and install it th
 
 12. **Environment variables don't always propagate.** Tools run through toolsrv, which sets specific env vars. If a tool calls another binary that expects `$USER` or `$OLLIE_UNAME`, verify those are actually set in the execution context. Provide explicit fallbacks.
 
-13. **Go build cache is aggressive.** When source changes don't appear in the binary, the cache may be stale. Use `go clean -cache` or verify with `go version -m <binary>` to check the embedded module version. Touch files if needed.
+13. **Don't blame the build system.** When a "fixed" bug keeps appearing, the code is probably fine. Check if you're reading stale data, hitting a different code path, or misunderstanding the actual error source. The build cache, the compiler, and the linker are rarely at fault.
 
 14. **Separate index files for separate concerns.** Don't cram session and agent data into one line. `session/idx` lists sessions; `session/{s}/agent/idx` lists agents per session. Simpler parsing, fewer race conditions, cleaner code.