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PaperClipAI/server
DottaandClaude Opus 5.5 e3bc4ca798 fix(native): settle warm follow-ups that a restart left behind (#20631)
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## Thinking Path

> - Paperclip is the open source app people use to manage AI agents for
work
> - Native warm runs on a remote sandbox continue the saved session of
the previous run. Admission first proves what happened to the previous
Runner.
> - A deploy restarted the staging server while warm Runners were idle.
Three follow-up runs then failed before provider work, each with a
different refusal, and their tasks stayed blocked.
> - The refusals asked for proof that a restart had made impossible. A
restart is a product failure, so recovery must settle it automatically
and keep the strict checks for real uncertainty.
> - This pull request accepts the proof that the restart leaves behind,
in three places: the warm owner on a replaced sandbox, the suspended
Runner with an undelivered suspend receipt, and the restore hold of a
run that saved nothing new.
> - The benefit is that these follow-up runs start, and state saved by
older releases carries forward without a migration.

## Linked Issues or Issue Description

Refs #20567, #20346

**What happened?**
On staging, a deploy replaced the webserver process at about 18:04 UTC
on 2026-11-10 (lease controller boot `348ec0bb` on one deployment, then
boot `3e84c195` on a new deployment that started at 18:04:16). Three
runs of one Codex agent on Daytona failed between 18:08 and 18:15:

1. A warm follow-up got a newly created sandbox. The previous warm
Runner stayed `ready` in its own retained sandbox. Live adoption denied
it with `runner_state_identity_mismatch:
prior_owner_terminal_state_indeterminate`
(`remote-warm-session-recovery.ts:127`), because only a resumed sandbox
may be adopted. The per-turn retirement path refused warm owners
(`lifecycle_not_per_turn`).
2. A warm follow-up resumed the same sandbox and directory. The previous
Runner had been suspended by the shutdown, but the controller stopped
before it acknowledged the suspend result. The Runner kept its terminal
fence (`pendingTerminalDelivery` for `runner.suspend`). The read refused
it with `native_controller_recovery_missing_evidence:runner_not_settled`
(`native-session-executor.ts:7032`).
3. A continuation into a fresh workspace failed with
`remote_workspace_recovery_receipt_invalid`
(`remote-workspace-recovery-attachments.ts:60`). Its predecessor had
restored the committed save, failed before provider work, and kept a
restore hold with no recovery receipt. Its saved reference named the
snapshot it restored.

**Expected behavior**
After a restart, the next run continues. It retires a finished owner
that nobody can adopt, reads a finished suspension, and skips a source
that left no unsaved files. Real uncertainty still refuses with a named
reason.

**Steps to reproduce**
1. Run a warm native Codex turn on a reusable Daytona sandbox and let it
commit.
2. Restart the server (deploy) while the Runner is idle.
3. Start the next turn. Get a new sandbox (case 1), or resume the same
sandbox after the shutdown suspended the Runner (case 2).
4. For case 3, continue a task whose previous run restored the last save
and failed before provider work, into a fresh workspace.

**Paperclip version or commit**
Staging before `2e3cbe57` (the runs predate that deploy). The gaps
remain on `master` at `9b21dcbd`.

## What Changed

- `inspectRemoteWarmSessionRecovery` returns `null` when this run's
sandbox is `created` or `replacement`. Such a sandbox holds no Runner to
adopt. The caller then uses ordinary admission.
- `inspectFinishedPerTurnRunnerdOwner` also retires a **warm** owner on
a remote sandbox runner when this run's sandbox is `created` or
`replacement`. It uses all the existing proofs: terminal run, committed
result, released coordinator lease, stopped or fenced controller,
settled journal, and quarantine copies. Local warm Runners and resumed
sandboxes keep the live path.
- `restoreRemoteSuspendedRunnerCheckpoint` accepts a suspended Runner
whose only open fence is its own undelivered `runner.suspend` receipt.
The fence must name `runner.suspend` with lifecycle `suspended`, it must
be the last controller command, and the restored journal must not name
that command differently. A provider cleanup, unsent events, a turn's
terminal fence or a warm transition still refuse with
`runner_not_settled`. A later authorized Runner process reconciles the
receipt, as the Runner already does.
- `attachPreservedRemoteWorkspaceSnapshots` skips a source with a
receipt-less restore hold when its saved reference names the exact
committed snapshot that its own succeeded `remote_workspace_restore`
loaded at the same epoch. Any other saved snapshot still needs the
canonical receipt.
- `doc/execution-semantics.md` describes the three rules.

## Verification

- Red (unfixed code), each in the exact staging shape:
- `native-recovered-owner-followup.test.ts` "retires a finished warm
owner left behind by a restart when this run's sandbox is
created/replacement" failed with `runner_state_identity_mismatch:
prior_owner_terminal_state_indeterminate`.
- `native-controller-recovery.integration.test.ts` "defers a remote warm
continuation…" failed: live adoption rejected a created/replacement
sandbox with the same error.
- `native-controller-recovery.integration.test.ts` "reads a resumed
sandbox's suspended Runner with an undelivered suspend receipt" failed
with `native_controller_recovery_missing_evidence:runner_not_settled`.
It reads through a sandbox runner that refuses paths outside the
workspace base.
- `workspace-recovery-preparation.test.ts` "decides a receipt-less
restore hold of a source that restored_unchanged" failed with
`remote_workspace_recovery_receipt_invalid`.
- Green: the same tests pass. Focused files pass:
`native-recovered-owner-followup.test.ts` and
`native-controller-recovery.integration.test.ts` (104 tests),
`workspace-recovery-preparation.test.ts` (85 tests).
- Safety cases (strict checks stay strict):
  - A warm owner on a resumed sandbox is not retired.
- A warm owner with an unsettled journal (pending command, unanswered
tool input) stays held and names `retirement_refused=journal_…`.
  - A warm owner whose finalization lease is still held stays held.
- A turn terminal fence, a provider cleanup, unsent events, a fence
behind a later command, or a journal that names the command differently
still fail with `runner_not_settled` and cache nothing.
- A restore-hold source that saved another snapshot, whose restore did
not succeed, or whose restore was at another epoch still fails with
`remote_workspace_recovery_receipt_invalid`.
- Neighbouring suites pass: `native-session-executor.test.ts`,
`plugin-runner-release-resume.integration.test.ts`,
`explicit-native-continuation.test.ts` and
`native-harness-filesystem-independence-continuation.integration.test.ts`
(1786 tests). The last one asserted the old warm refusal on a created
sandbox. It now shows that the warm follow-up resumes the same provider
session for the new run.
- `npx tsc --noEmit -p server/tsconfig.json` passes.
- `pnpm verify` returns exit 2, because a global doc input changed
(`doc/execution-semantics.md`). Required CI supplies the broad coverage.

## Risks

- Previous-release state: all three rules read state that earlier
releases already save (lease outcome, coordinator rows, Runner state in
the sandbox, journal commands, run results and workspace operations).
Rows saved by older releases carry forward. No migration.
- Case 1 starts a new Runner for a warm session whose old Runner may
still exist, idle, in its retained sandbox. Its controller is gone and
its result is committed, so it can accept no new commands. The provider
session follows the existing resume-or-replace policy.
- Case 2 trusts a suspend fence only in the exact shape that the Runner
writes before it sends the result. Other fences still refuse.
- After case 1, a warm follow-up resumes from its own warm checkpoint.
That checkpoint carries no replacement policy, so a failed provider
resume is still reported as `native_session_recovery_failed` and is not
replaced. This is the existing warm behavior.
- Case 3 skips a source only when it provably saved nothing beyond a
committed snapshot. That snapshot stays in its own workspace.
- The three tasks that already failed stay blocked until their next wake
or a user message. This PR does not add an automatic continuation for a
completed no-replay hold. A follow-up can add that.
- `native-runner-restart-recovery.integration.test.ts` (runs only with a
runner container) no longer probes a replacement sandbox, because that
probe now retires the owner by design.
- Not verified live on Daytona.

> 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, via Claude Code with
tool use (shell, file edits, read-only browser access to staging).
Extended reasoning enabled.

## 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>
2026-11-10 14:38:30 -06:00
..