diff --git a/SKILL.md b/SKILL.md
index ceae7f2..91dae7b 100644
--- a/SKILL.md
+++ b/SKILL.md
@@ -636,6 +636,9 @@ Scripts that know a project's layout stay in that project.
 - **Before a merge, verify every test project that consumes the changed package, not only the package's
   own.** CultMath Phacelle merged on CultMath's green suite (2026-09-30); Caching checks every public
   CultMath value type for a converter, formatter and dictionary key, and main went red.
+- **A merge of a long-lived branch can break semantically with no textual
+  conflict** (the LookDirection to Aim rename, 2026-10-07). Dispatch a merge Hands
+  that verifies and fixes mechanical adaptations only.
 - **Pin sibling checkouts with a guard that checks revision and cleanliness.**
   Scope the guard to projects that actually reference the sibling.