Ψ-W1-T3 review remediation: soften the double-fire claim to unspecified-by-SDK, mark the unload mirror [verify — DAW], fix stale comment, drop redundant assertions, dedupe hook-partitioning comments, drop what-comment; file the action_registry test-seam deferral.

src/app/main.cpp

@@ -230,8 +230,8 @@ static bool OnHookCommand(int command, int /*flag*/)
 }
 
 // "hookcommand" covers the main section only, so actions we published into another
-// section arrive here instead. Claim ONLY those — every main-section id stays with
-// OnHookCommand, so no command can be claimed by both hooks.
+// section arrive here instead. Partitioning contract: root `CLAUDE.md` §"REAPER
+// extension contract".
 static bool OnHookCommand2(KbdSectionInfo* /*sec*/, int command, int /*val*/, int /*val2*/,
                            int /*relmode*/, HWND /*hwnd*/)
 {