M16-GAP-00173 Status

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

scope:

The minimal fixture exposes one scripted driver on drive_target; the reader exports its path, expression, type, flags, and variables for WASM/Main.

evidence:

Blender desktop and WASM/Main expose the same driver (["drive_target"], expression frame * 2.0 + 1.0, type SCRIPTED), with value 3.0.
The desktop checker invokes ANIM_OT_copy_driver_button in the mandated -b context and records CANCELLED: the operator requires an active UI RNA button, so the cancellation leaves Main unchanged while the driver-read parity evidence remains exact.
Save/reopen preserves the driver exactly; malformed Blend input is rejected without Main mutation.
Fixture generation, desktop checker, npm comparator, direct comparator, and artifact hashing passed.

nextTask: M16-GAP-00174