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DottaandClaude Opus 5.5
8c761abae3
## Thinking Path
> - Paperclip is the open source app people use to manage AI agents for
work
> - After a controller restart, a run whose remote Runner kept running
reattaches. First it resumes its exact sandbox lease through the sandbox
provider plugin (`resumeRunLease`).
> - #20982 made a plugin whose worker `initialize` timed out retry its
activation, so the plugin comes back seconds later instead of staying
`error`.
> - Chaos cell CR6 (#20983) shows the gap that remains. The reattaching
run asks for its lease during those seconds and gets
`PluginWorkerUnavailableError`. The setup retry covers that error only
for legacy runs, so the native restart-recovery run fails and needs
Retry.
> - This pull request makes the exact-lease resume wait, for a bounded
time, for the worker of a plugin that is `ready` (re-activating) or
recovering from activation timeouts.
> - The benefit is that a restarted run rides through a short plugin
re-activation instead of failing into Retry.
## Linked Issues or Issue Description
Refs #20982, #20983
**What happened?**
CR6 after #20982 (`w-20261112T041333-s9531`) passed in part. The plugin
re-activated 5 s after its `initialize` timeout, but both tasks finished
with `R3:retry_needed`. Run `a6b3f0f6` resumed its lease at 22:15:35,
inside that window. It failed with `setup_failed` /
`plugin_worker_unavailable` and then `agent_stop_unconfirmed`, because
`run-completion.ts` retries `PluginWorkerUnavailableError` only for
legacy runs (`runtimeMode === "legacy" && nativeSessionId === null &&
runnerInstanceId === null`).
**Expected behavior**
The resume waits for the plugin's worker while the plugin re-activates.
It resumes the same lease when the worker comes back. It still refuses,
as `PluginWorkerUnavailableError`, after the bound.
**Steps to reproduce**
1. Run chaos cell CR6: a K1 restart, then a stall of the replacement's
plugin worker during activation.
2. The reattaching run fails and needs Retry, although the plugin
recovers within seconds.
**Paperclip version or commit**
master at f1aef0cb58.
## What Changed
- `environment-runtime.ts`, `resumeRunLease`: the worker is not running,
but the plugin is `ready` or its activation-timeout recovery is in
flight. In that case the resume polls `isRunning`, every
`pluginWorkerReadyPollMs`, for up to `pluginWorkerResumeWaitMs` (default
60 s). That bound covers the first two activation retries (5 s, then 15
s). When the worker runs, the normal exact resume goes on. After the
bound it refuses with `PluginWorkerUnavailableError`, as before.
- Nothing changes when the worker is running: no wait, no added latency
on the normal path. A plugin that is `disabled`, `uninstalled`, or
`error` for a reason other than a timeout is not waited on.
- `doc/plugins/PLUGIN_SPEC.md` §12 describes the wait.
## Verification
- Red on master: `npx vitest run
src/__tests__/environment-runtime.test.ts -t "re-activating plugin's
worker comes back"` (in `server/`) fails with
`PluginWorkerUnavailableError`.
- Green: the test passes. The worker comes up on the fourth `isRunning`
check, and the lease is resumed with one `environmentResumeLease` call.
- The existing refusal test, now with a 50 ms bound, still refuses with
no provider call.
- `environment-runtime.test.ts` passes (205 tests), and `tsc --noEmit`
passes for `server`.
## Risks
- A restart-recovery run whose provider plugin never comes back now
waits up to 60 s more before it fails. It fails the same way as before.
> For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and
discuss it in `#dev` before opening the PR. Feature PRs that overlap
with planned core work may need to be redirected — check the roadmap
first. See `CONTRIBUTING.md`.
## Model Used
- Claude Opus 5.5 (`claude-opus-5-5`), Anthropic, through Claude Code
with tool use (shell, file edit, code search). Extended reasoning was
on.
## 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
- [ ] All Paperclip CI gates are green
- [ ] Greptile is 5/5 with no open P2s, recommendations, or follow-ups
- [x] I will address all Greptile and reviewer comments before
requesting merge
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>