`prConflictWipColumns` builds the worktree-owner index behind
`ownedByOtherInProgressTask` — the guard that stops this sweep
**deleting a worktree another live task is executing in**. Keyed on the
id, that index is empty on a renamed board, so every worktree reads as
unowned.
## Two discarded attempts, and why they matter more than the fix
**1. Asserted `result.outcome !== "reclaimed"`.** It failed *with the
fix in place* — `reclaimed` is reachable through a second path this
guard does not gate. **An outcome assertion cannot isolate a guard in a
sweep with several routes to the same outcome.** That also explains my
earlier discard on `reclaimSelfOwnedBranchConflicts`, which has the same
shape.
**2. Asserted `removeWorktree` was not called — but overrode the task's
branch while leaving its id.** The reclaim path also requires
`branchOwnerTaskId === taskIdUpper`, so the branch was never reachable
and the case passed **blinded**: vacuous for a reason that had nothing
to do with lanes.
The shipped version asserts `removeWorktree`, which runs **only** on the
guarded branch and is the irreversible part, and keeps the default
id/branch pair so that branch is genuinely reachable.
## Measured
16 pass; blinding `prConflictWipColumns` fails exactly this case.
**20 of 26 pinned** across 19 merged PRs.
## Generalisation
For sweeps with multiple paths to one outcome, the discriminating
observable is a **path-specific side effect** — `removeWorktree`, a
`task:reconcile-*` audit type, a specific `reason` string — not the
return value. Every case I landed today that stuck used one; both
discards asserted a return value.
## Verification
`self-healing-pr-conflict` **16 passed** · `pnpm test:gate` 13 + 161 +
487 + 71 · lint — green.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **Bug Fixes**
* Improved protection for active worktrees during pull request conflict
recovery, including tasks in renamed workflow lanes.
* **Tests**
* Added regression coverage to verify that worktrees owned by other
tasks are not removed incorrectly.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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