Reclaims finished bash task scratch directories only after their process groups exit, removed on a dedicated bounded worker, and drains vanished-checkout views in consecutive bounded passes with a visible backlog count.
Terminal task records keep their scratch until the process group disappears, including failed launches whose PTY group identity survives setup failure, and while any read-only schema probe reusing the launch sandbox is still running.
Scratch removal runs on a single process-wide worker with a capped queue, so deletion never blocks task locks, terminal completion notices, or watchdog timeouts.
Task records retain ownership of pending scratch until removal confirms, so persisted GC in another project cannot delete them even after the owning registry unloads.
The bounded scratch sweep ages terminal records as well as scratch, reclaiming older terminal task scratch while live bundles and just-finished sandboxes stay protected.
Vanished-checkout views are prioritized over other cache planes, with a remaining backlog count surfaced in sweep and health output; passes continue while progress lasts and stop when stalled or cancelled.
Confidence Score: 5/5
The PR appears safe to merge; no new actionable issue was established.
Summary
Finished bash tasks now release scratch after their process groups exit. Removal runs on a bounded worker while task records retain the information needed for retry.
Finished bash tasks release scratch after their processes and follow-up work end.
Vanished-checkout views drain first in consecutive bounded sweeps.
The earlier unnumbered watchdog finding is addressed: recursive scratch deletion now runs on the worker rather than under the task lock.
Diagram
%%{init: {'theme': 'neutral'}}%%
flowchart TD
A[Task becomes terminal] --> B{Process group gone and hint finished?}
B -->|No| C[Keep scratch and retry]
B -->|Yes| D{Cleanup queue has room?}
D -->|No| C
D -->|Yes| E[Worker removes scratch]
E --> F{Removal succeeded?}
F -->|No| C
F -->|Yes| G[Clear persisted scratch path]
G --> H[Allow task retirement]
