diff --git a/tasks/lessons.md b/tasks/lessons.md
index 11ad834..d447d02 100644
--- a/tasks/lessons.md
+++ b/tasks/lessons.md
@@ -28,3 +28,5 @@ publication"; calibration debates -> "the honest statement"; positioning battles
 surface as defensive or self-referential prose. Rule: before finalising any reader-facing passage,
 ask "does understanding this sentence require knowing how we worked?" If yes, rewrite it as a plain
 statement about the literature or the result. Confident papers situate; they do not litigate.
+(Promoted to a general rule in the global ~/.claude/CLAUDE.md, 2026-08-11 — it applies to all
+reader-facing prose in every project.)