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PaperClipAI/packages
Nicky LeachandPaperclip e25a6b797f fix(runner): close two timing windows in the capability-live suspend path (#13143)
## Thinking Path

> - Paperclip is the open source app people use to manage AI agents for
work.
> - The Paperclip Runner manages live agent sessions and their suspend
path.
> - A turn-timeout promise could reject before `reconcileActiveTurn()`
attached its handler.
> - A short provider-drain budget could reject a valid suspend on a
loaded continuous-integration host.
> - This pull request closes both timing windows and adds deterministic
regression tests.
> - The benefit is a fail-closed suspend path that does not report false
failures under load.

## Linked Issues or Issue Description

**What happened?**

Capability-live tests failed under load. A turn-timeout promise could
raise an unhandled rejection during a slow interrupt round trip. An idle
provider drain could also exceed its one-second proof budget during
suspend.

**Expected behavior**

The suspend path must observe turn-timeout rejections and allow enough
time for one provider command round trip. It must still fail closed when
the runner does not prove durable suspension.

**Steps to reproduce**

1. Run the capability-live tests on a loaded four-vCPU
continuous-integration host.
2. Delay a `turn/interrupt` reply beyond the turn timeout.
3. Close a live session and observe the suspend barrier.

**Paperclip version or commit**

`01b442b2926ac2010a2fcfbda6592802472ef07f`

**Deployment mode**

Built from source with the Paperclip Runner test suite.

## What Changed

- Attach the turn-timeout rejection handler inside `armTurnWaiter()` at
promise creation.
- Remove the redundant per-call-site guard in `sendMessage()`.
- Use a uniform five-second provider-drain proof budget, capped by the
outer preparation deadline.
- Remove the unused boolean return from the provider-turn-stop helper.
- Add deterministic tests for the delayed interrupt and the short close
grace period.

## Verification

- `npx vitest run
packages/paperclip-runner/src/live/live-session.test.ts` passed locally
with zero skipped tests.
- `npx vitest run
packages/paperclip-runner/src/live/runnerd-codex-transport.test.ts`
passed locally with zero skipped tests.
- The two new tests appeared in the local run output and were not
skipped.
- The package type-check passed locally.
- GitHub Actions must confirm the full continuous-integration suite,
including `Verify Paperclip Runner`.

## Risks

- The provider-drain wait now allows up to five seconds before the outer
deadline caps it.
- The fail-closed suspend barrier remains unchanged.
- The test suite still depends on the Rust runner binary for
capability-live tests.

## Model Used

OpenAI Codex, GPT-5. The runtime provided tool use and code execution.
The runtime did not provide a context-window value.

## 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>
2026-09-10 07:04:55 -07:00
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