---
model: claude-fable-5
service: claude
timestamp: 2026-07-02T16:58:06Z
git_ref: a34aaf98
diff_cmd: git diff a34aaf98..wkt/to_actor_subpkg
---

# Raw AI output (diff-ref mode)

Step-A code is committed on `wkt/to_actor_subpkg`
directly after `a34aaf98`; per diff-ref mode the verbatim
content is reachable via the pointers below.

## Generated files

> `git diff a34aaf98..wkt/to_actor_subpkg -- tractor/runtime/_supervise.py`

New `_reap_ria_portals(an, errors, ria_children=None)`
helper (one `_spawn.cancel_on_completion()` task per ria
child under `collapse_eg()` + a local nursery);
`run_in_actor()` drops `nursery=self._ria_nursery`; happy
path awaits the reap right after `._join_procs.set()`;
inner error handler snapshots ria pairs, runs
`await an.cancel()` then a `move_on_after(0.5)`-bounded
reap over the snapshot.

> `git diff a34aaf98..wkt/to_actor_subpkg -- tractor/spawn/_trio.py`
> `git diff a34aaf98..wkt/to_actor_subpkg -- tractor/spawn/_mp.py`

Both backends: the post-`_join_procs` block collapses to
a bare `soft_kill()` (membership branch, per-child reaper
nursery, reaper-cancel logging and the now-unused
`cancel_on_completion` imports all removed).

> `git diff a34aaf98..wkt/to_actor_subpkg -- ai/conc-anal/ria_nursery_removal_plan.md`

Agent-verified machinery map, 3-step design (A/B/C),
probe history (deadlock -> sequencing fix -> bound
tightening) and risk register.

## Test runs (verbatim)

```
tests/test_cancellation.py: 20 passed, 1 xfailed in 77.28s
tests/test_to_actor.py + tests/test_spawning.py: 20 passed
full-suite (SIGINT at 540s bound, ~30s short):
303 passed, 9 skipped, 1 xfailed, 2 xpassed in 539.42s
```

Failed intermediates (not in final diff): concurrent
reap+`an.cancel()` deadlocked `test_multierror`; a 3s
reap bound blew
`test_cancel_while_childs_child_in_sync_sleep`'s
`fail_after` deadline.