docs: add human mention override requirement

TASKLIST.md

@@ -41,3 +41,9 @@
 
 ## Open Items / Notes
 - User requested the previous README commit should have been pushed to `main` directly (was pushed to a branch). Address separately if needed.
+- **New feature: Human @ list override**
+  - When a message is from a user in `humanList` and contains `<@USER_ID>` mentions:
+    - Detect which agents are @-mentioned (e.g., a, b, c).
+    - Determine their order in the current speaking order list (e.g., a → b → c).
+    - Temporarily replace the speaking order with `[a, b, c]` and cycle a → b → c.
+    - After the cycle returns to **a** again, restore the original speaking order list.