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PaperClipAI/packages/paperclip-runner/docs
Nicky LeachandPaperclip 09412e652a fix(runner): allow warm release to drain after provider restart (#20290)
## Thinking Path

> - Paperclip is the open source app people use to manage AI agents for
work.
> - Warm Runner sessions park after a turn so follow-up tasks can claim
the same process.
> - Claude restarts its ACPX provider after the controller receives the
terminal result.
> - That restart can delay the drain receipt beyond the release path's
one-second limit.
> - A failed drain prevents parking, so the idle timer later closes the
retained Runner.
> - This pull request uses the existing warm admission budget for
release drain.
> - The benefit is retained Runner reuse without moving provider restart
onto task dispatch.

## Linked Issues or Issue Description

Fixes: #20225. Refs #20190 and #20145. Related performance follow-up:
#20224.

## What Changed

- Align the release drain timeout with the existing 30-second warm
admission budget for every provider. Close paths keep their explicit
remaining deadlines.
- Keep the existing immediate completion when the drain receipt proves
settlement. Add no sleep, retry, provider branch or dispatch work.
- Add a real Runner regression with a fake ACPX sidecar whose
replacement start takes 1.5 seconds. One release call must park the
Runner, then a follow-up must claim the same Runner process.
- Document the release drain budget.

## Verification

- Targeted command in `packages/paperclip-runner`: `vitest run
src/live/runnerd-codex-transport-release-resume.test.ts
src/live/runnerd-codex-transport-settlement.test.ts
src/live/runnerd-codex-transport-deadlines.test.ts`: **46 passed**
across 3 files, 157.78 seconds.
- Independent parent verification reran the slow-restart and ordinary
cached cases: **2 passed**. Source review confirmed that release is the
only caller using the changed default; close callers supply explicit
deadlines.
- Negative control: with the original one-second timeout, the new test
fails because the single release call returns `false`. The fixed code
passes the new case.
- Built only the current-source Runner and two fixture binaries required
by these tests. The first sandboxed invocation could not bind its
loopback listener (`EPERM`); the test ran with loopback access
afterward.
- Full GitHub PR workflow
[42644210993](https://github.com/paperclipai/paperclip/actions/runs/42644210993)
passed on head `9cfda0927b514d8d40443b612afa92525b35b700`. Standard
Greptile scored this same head 5/5 with no review threads. Full
repository checks ran in GitHub CI, per the requested local test scope.
No live Claude session or hosted deployment was tested.

## Risks

- An unresponsive Runner can now hold release drain for up to the
existing 30-second warm admission limit. A healthy Runner returns as
soon as its receipt arrives. The provider restart stays at turn end;
task dispatch gets no fixed delay.
- Saved state, protocol and provider identity formats do not change.
Previous-release state carries forward under the existing validation.
- The controlled fake-sidecar test proves the restart timing race and
process reuse. It does not qualify live provider latency or a hosted
rollout.

## Model Used

- OpenAI GPT-6 through Codex, with repository tools, code editing and
targeted test execution. The exact serving revision and context window
are not exposed in this session.

## Checklist

- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have searched GitHub for duplicate or related PRs and linked
them above
- [x] I have either (a) linked existing issues with `Fixes: #` / `Closes
#` / `Refs #` OR (b) described the issue in-PR following the relevant
issue template
- [x] I have not referenced internal/instance-local Paperclip issues or
links (only public GitHub `#NNN` / `github.com/paperclipai/paperclip`
URLs)
- [x] My branch name describes the change (e.g. `docs/...`, `fix/...`)
and contains no internal Paperclip ticket id or instance-derived details
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] All Paperclip CI gates are green
- [x] Greptile is 5/5 with no open P2s, recommendations, or follow-ups
- [x] I will address all Greptile and reviewer comments before
requesting merge

Co-authored-by: Paperclip <noreply@paperclip.ing>
2026-11-09 07:43:27 -08:00
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