# M16-GAP-00227 Status

status: done
task: armature.collection_remove_unused operator LOCAL_EXACT slice
updated: 2026-08-22 America/New_York

scope:

- The minimal fixture contains two bone collections retaining one distinct bone each and two empty collections, with an empty collection active at index 2.
- Desktop runs `ARMATURE_OT_collection_remove_unused` with `poll=true` and `FINISHED`, removing both unused collections, preserving the retained collections and bones, and keeping the result through save/reopen.
- The existing Main reader's collection indices and bone IDs provide the observable removal; no new data-block, editor, or browser behavior was added.

evidence:

- The generator, desktop checker, npm comparator, direct comparator, and task-context checks passed. Repeated checker runs recognize the already-removed collections and remain idempotent.
- WASM/Main observes the same remaining collection order, member IDs, and active index, preserves them across save/reopen, and rejects malformed Blend input without Main mutation.
- Chromium-only policy was preserved; no Firefox/WebKit run was made.

nextTask: `M16-GAP-00228`