M16-GAP-00174 Status

status: done task: anim.driver_button_add operator LOCAL_EXACT slice updated: 2026-08-21 America/New_York

scope:

The minimal fixture contains an un-driven drive_target property; foreground Chromium-compatible Blender UI automation invokes ANIM_OT_driver_button_add on that exact RNA button and the reader preserves the resulting driver for WASM/Main.

evidence:

Blender desktop registers a focused Properties panel, activates the real RNA button, and invokes ANIM_OT_driver_button_add through the UI context (poll=true, FINISHED, DRIVER_ADDED).
Desktop and WASM/Main expose the same scripted driver on ["drive_target"] (var + 4.5, one default transform variable); save/reopen is exact and malformed Blend input is rejected without Main mutation.
Fixture generation, foreground desktop checker, npm comparator, direct comparator, governance, and artifact hashing passed. The checker is idempotent for the already-mutated exact fixture.

nextTask: M16-GAP-00175