diff --git a/docs/TASKS.md b/docs/TASKS.md
index ea5f111..46f1c6e 100644
--- a/docs/TASKS.md
+++ b/docs/TASKS.md
@@ -90,7 +90,7 @@ requirement is missing and blocks implementation, record it in
 -   [ ] Make selected instruments available to OpenAI/song-generation
     logic for arrangement, roles, entry/exit timing, relevant structure
     decisions and Suno Style Prompt generation.
--   [ ] Preserve existing Manual/Auto arrangement behavior.
+-   [x] Preserve existing Manual/Auto arrangement behavior.
 -   [ ] Add tests for catalog search, category/region filtering,
     selection persistence and SongProject serialization.