1 files changed, 1 insertions, 0 deletions
diff --git a/GEMINI.md b/GEMINI.md
index c57c12d..dec6c71 100644
--- a/GEMINI.md
+++ b/GEMINI.md
@@ -67,6 +67,7 @@ IMPORTANT:
 - Work only on tasks explicitly requested by the user
 - Do NOT modify files outside the current scope
 - Do NOT perform refactors or cleanups unless explicitly asked
+- **Always use `-j4` for all `cmake --build` commands.**
 
 # Context Maintenance:
 - See @doc/CONTEXT_MAINTENANCE.md for keeping context clean