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PaperClipAI/doc
DottaandPaperclip 8ec4b84e1c fix(chat): resume messages after failed runs without duplicate delivery (#14857)
## Thinking Path

> - Paperclip is the open source app people use to manage AI agents for
work.
> - A user can send a new message after a native run fails.
> - The server checks that the old execution has stopped before it
starts a fresh turn.
> - A failed run can retain a result accepted before checkpoint or
cleanup failed.
> - The continuation gate treated that saved result as active recovery
and held the new message forever.
> - This pull request removes that false liveness signal while retaining
controller, process, environment, and authorization checks.
> - Live staging then exposed a second defect: chat admission created a
successor without consuming the original deferred receipt, so completion
delivered the message again.
> - Consume that exact receipt atomically with admission, while
preserving separate turns for later chat messages.

## Linked Issues or Issue Description

**What happened?**

A new user message stayed in the queue with `controller_settling` after
the previous run had reached `terminal_failure`. The old coordinator had
no lease owner but still had a `resultId`. Its remote environment had a
verified stop receipt.

**Expected behavior**

Start one fresh turn after execution has stopped and normal admission
checks pass. Preserve the failed run and its accepted result as history.

**Steps to reproduce**

1. Accept a native result, then fail checkpoint or cleanup and exhaust
recovery.
2. Retain the result ID on the terminal failure record and stop the
execution environment.
3. Send a new user message. Before this fix, it waits forever for the
finished controller.

**Paperclip version or commit**

Reproduced in a database-backed regression test on `26900655b`.

**Deployment mode**

Server with a native runner and remote sandbox. Local process stop
checks also apply.

Related: https://github.com/paperclipai/paperclip/pull/14775. Searched
existing PRs for retained-result continuation fixes; no duplicate found.

## What Changed

- Remove the retained-result veto for terminal failures.
- Keep controller ownership, successor, process, environment cleanup,
pending decision, and ordinary admission checks.
- Add regressions for retained results, active execution, missing stop
evidence, and delayed remote cleanup.
- Atomically consume the resumed receipt in agent chat, even though chat
does not coalesce other queued messages.
- Reproduce completion-time duplicate promotion, race cleanup against
periodic recovery, and prove a subsequent chat message keeps its own
turn.
- Document that a saved result does not make a terminal failure active.
- Keep exhausted workspace export on its separate repair path, tested
through the production finalizer.

## Verification

- Red: retained-result admission failed with `controller_settling`
before the original fix. The new chat-specific regression then
reproduced duplicate promotion when the first reply finished.
- Green: 406 tests across native continuation, workspace-export
recovery, and the wake-queue module passed on `cbc531cc0`.
- The chat regressions exercise real Postgres transactions, simultaneous
recovery callbacks, successful completion, the production queue-drain
use case, and repeated drain attempts. A distinct follow-up remains a
separate turn.
- `pnpm -r typecheck` and `pnpm build` passed on `cbc531cc0`.
- The earlier full local test run encountered a timeout and follow-on
failure in unchanged AI connection-adoption tests; all 50 tests passed
on isolated rerun. That local run was stopped after the full CI test
matrix passed on the earlier head.
- All 54 CI checks passed on `cbc531cc0` (2 skipped), including the full
test matrix and browser shards. One unchanged interaction-route test
returned HTTP 500 on its first CI attempt; its full 84-test file passed
locally, and the failed shard passed on one targeted rerun.
- Greptile reviewed `cbc531cc0`: 5/5, no unresolved findings.
- Live staging first verified that the original saved message resumes
and receives a successful response; that test exposed the duplicate now
covered above.
- Deployed exact commit `cbc531cc0410e1ef6e8811c6c5c014c3528351ed` to
the affected staging workspace; deployment verification, health,
authentication, and startup recovery passed.
- Submitted a fresh message through the browser. The agent replied in 39
seconds; server records show exactly one successful run, native phase
`committed`, no error, and an empty queue. A later check more than a
minute after completion found no duplicate run.

## Risks

The change affects admission after native execution failure and
consumption of a resumed deferred receipt. A fresh turn must never
overlap the prior execution, and consuming one chat receipt must not
absorb later messages. Tests retain the controller, process, and
remote-stop guards. This change does not migrate data, apply an old
result, or reset the old retry budget.

## Model Used

OpenAI Codex (GPT-6). The exact runtime model identifier and context
window are not exposed in this session. Used reasoning, repository
inspection, code execution, database-backed tests, and browser
inspection.

## 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

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Co-authored-by: Paperclip <noreply@paperclip.ing>
2026-10-01 14:43:02 -05:00
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