diff --git a/docs/AUDIT_REDESIGN.md b/docs/AUDIT_REDESIGN.md
index 75fba45..a68537a 100644
--- a/docs/AUDIT_REDESIGN.md
+++ b/docs/AUDIT_REDESIGN.md
@@ -58,7 +58,7 @@ Status: ⬜ open · 🟦 in PR · ✅ fixed (commit hash on the right).
 | D3  | `TickerHeader` exchange is hard-coded "NASDAQ".                                                                                    | 🟢       | ✅     | 1e502b9    |
 | D4  | `ScreenerView` "More sectors…" `<select>` doesn't visually highlight the chosen sector pill once selected.                          | 🟡       | ✅     | 3bf1ca7    |
 | D5  | Layout is fixed-width (72 px sidebar + 308 px right panel). Breaks below ~1024 px viewport. No mobile-web responsive breakpoints.   | 🟠       | ✅     | a9c33b1    |
-| D6  | `VisualRuleBuilder` and `CodeStrategyEditor` use `setTimeout` without cleanup — leak warning if component unmounts mid-timer.        | 🟢       | ⬜     |            |
+| D6  | `VisualRuleBuilder` and `CodeStrategyEditor` use `setTimeout` without cleanup — leak warning if component unmounts mid-timer.        | 🟢       | ✅     | 2089b9a    |
 | D7  | No keyboard shortcuts (⌘K search, ⌘S save in code editor, ⌘Enter run backtest).                                                    | 🟢       | ⬜     |            |
 | D8  | `EmptyState` ticker chips are hard-coded equities. For a crypto-config bot the chips don't apply.                                  | 🟢       | ⬜     |            |
 | D9  | No `prefers-reduced-motion` handling on spinners / animations.                                                                      | 🟢       | ⬜     |            |
diff --git a/docs/COMPLETION_CHECKLIST.md b/docs/COMPLETION_CHECKLIST.md
index d83a6e2..4be5e88 100644
--- a/docs/COMPLETION_CHECKLIST.md
+++ b/docs/COMPLETION_CHECKLIST.md
@@ -419,7 +419,7 @@ Expected platform result:
   keyboard and screen-reader state remains clear, and sorting/filtering remains
   unchanged.
 
-- [ ] `D6` Clean up editor timers.
+- [x] `D6` Clean up editor timers. Implementation: `2089b9a`.
   Acceptance: `VisualRuleBuilder` and `CodeStrategyEditor` clear any save/status
   timers on unmount and do not set state after unmount.