## Summary
Moving an active task back to Todo could update the board before its
agent and subprocesses had stopped, leaving a Todo card that was still
processing. User-initiated in-progress-to-Todo moves now wait for every
executor cancellation surface before the new column is persisted or
returned to the dashboard. Cancellation is fail-closed and bounded: a
wedged shutdown leaves the task in Progress, releases its lock for
recovery, and fences late cleanup from replacement execution
generations. Engine-driven recovery moves and other transitions retain
their existing behavior.
## Validation
- Confirmed with PostgreSQL-backed symptom tests that the durable row
stays in Progress while cancellation is pending and that a timeout
releases the task lock without publishing Todo.
- Verified multi-executor ownership and replacement-generation fencing
across focused core and engine tests: 18 tests passed.
- Core build, engine typecheck, targeted lint, and strict changeset
validation passed.
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[](https://github.com/EveryInc/compound-engineering-plugin)
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