Files
PaperClipAI/server
Devin FoleyandPaperclip 0f84df91da fix(native): accept a completed child's file in the parent's completion report (#20325)
## Thinking Path

> - Paperclip is the open source app people use to manage AI agents for
work
> - In onboarding, the agent plans the user's first task, creates one
child task for the work, and waits for it
> - The `first-task` skill tells the agent to publish a requested file
on the child task. When the parent wakes, the agent links the child's
file and does not publish a copy
> - Native `register_deliverable` is bound to its current task, so the
parent cannot register the child's file again
> - The native completion check required each cited attachment to be on
the task being completed
> - So when the parent cited the child's download link,
`paperclip_finish` failed, and the agent reported the finished
onboarding task as blocked
> - This pull request lets a completion report cite an attachment on a
direct child task that is done
> - The benefit is that onboarding closes after its child task delivers
a file, and the user does not see a false "blocked" status

## Linked Issues or Issue Description

Related: #18258 (onboarding artifact completion instructions).

**What happened?**
An onboarding run created a child task to build and publish a project.
The child task registered `project.zip` with `register_deliverable` and
was marked done. The parent woke with reason `issue_children_completed`.
The agent called `paperclip_finish` with `reportedWorkDisposition:
"done"` and cited the child's `/api/attachments/<id>/content` link. The
call failed two times with:

```
Completion cites no registered attachment on this task. Use register_deliverable for the requested file and cite deliverable:<attachmentId> from its receipt.
```

The skill does not let the agent register the file on the parent, so the
agent called `paperclip_block` with "Paperclip completion validation" as
the owner. The parent task stayed `blocked`. Nothing wakes it again.

**Expected behavior**
The parent completes and links the child's file.

**Steps to reproduce**
1. Create a task with a child task.
2. In a native run on the child, register a file with
`register_deliverable`, and mark the child done.
3. In a native run on the parent, call `paperclip_finish` with
`reportedWorkDisposition: "done"` and the child's
`deliverable:<attachmentId>` or
`/api/attachments/<attachmentId>/content` as evidence.
4. The call fails with "Completion cites no registered attachment on
this task".

## What Changed

- `server/src/services/native-runtime/native-deliverable-feedback.ts`:
when a cited attachment is not on the task,
`validateNativeDeliverableEvidence` also looks for it on a direct child
task with status `done`. If it is there, the citation is accepted.
- The child's file is context, the same as an attachment from an earlier
run on the same task. It does not count as this run's publication of a
file that the parent's own request names.
- With `lockSources`, the finalization path locks the attachment and
child task rows with `FOR SHARE NOWAIT`, as it does for other sources.
  - The error text now says "on this task or its completed child tasks".
- This applies to the `paperclip_finish` check and to the two
finalization checks, because they use the same function.
- `doc/AGENT-ARTIFACTS.md`: the native runner section states that a
completion report can cite a file on a completed direct child task.

## Verification

- Extended "prepares one verified same-run attachment and replays
without duplicates" in
`server/src/services/native-runtime/native-runner-file-handoff.test.ts`:
  - An attachment on an unrelated task is still rejected.
  - An attachment on a child task that is not done is still rejected.
- An attachment on a done child task is accepted, through
`paperclip_finish` and through the locked finalization path.
- When the parent's own request names a file, the child's file alone
does not satisfy it.
- Without the source change, the test fails with the same error as the
run above.
- `npx vitest run` on `chat-attachment-reuse`,
`native-completion-feedback`, `native-completion-format-feedback`,
`native-deliverable-feedback`, and `native-runner-file-handoff` tests in
`server/src/services/native-runtime`: 281 passed.
- `npx vitest run src/__tests__/native-result-commit-work.test.ts
src/__tests__/native-status-arbiter-corpus.test.ts` in `server`: 167
passed.
- `npx tsc --noEmit -p server/tsconfig.json` passes.

## Risks

- Only direct children with status `done` are accepted. A grandchild's
file, or a file on a child that is not done, is still rejected.
- A parent that names a requested file in its own request still needs
its own delivery evidence. This keeps the current rule for earlier
outputs.
- A task that is already blocked by this error does not change. The user
can mark it done, or comment so the agent runs again.

## Model Used

- Claude Opus 5.5 (`claude-opus-5-5`), Anthropic, used through Claude
Code with tool use (code reading, database queries, shell commands, and
test runs).

## 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

Co-authored-by: Paperclip <noreply@paperclip.ing>
2026-11-09 09:44:17 -08:00
..