## Thinking Path
> - Paperclip is the open source app people use to manage AI agents for
work
> - Task watchdogs review issue subtrees when no run or queued wake
keeps work live
> - Pending human interactions and approvals are valid stopped states
that still need one watchdog review
> - The existing fingerprint included volatile activity timestamps, so
unchanged stopped trees could wake repeatedly after comments, documents,
work products, or sibling completions
> - This pull request fingerprints only review-material leaf and wait
state, persists the reviewed snapshot, and suppresses shrink-only
repeats
> - The benefit is one review per materially new stopped state without
weakening liveness classification or hiding human waits
## Linked Issues or Issue Description
### What happened?
Task-watchdog stop fingerprints changed for metadata-only activity and
completed siblings, producing duplicate wakes after an unchanged stop
had already been reviewed.
### Expected behavior
Pending interactions and approvals remain classified as stopped, but a
reviewed stopped state only wakes again when waits, non-terminal leaves,
status, assignment, or blockers gain material changes.
### Steps to reproduce
1. Review a stopped watched subtree with a pending human wait or
multiple non-terminal stopped leaves.
2. Add only comment/document/work-product activity, or complete one
stopped sibling without changing the wait set.
3. Observe a duplicate wake from the timestamp-heavy fingerprint.
Related public work: Refs #9452 for overlapping task-watchdog service
edits and #10043 for related no-op fingerprint suppression.
## What Changed
- Added fingerprint v2 over non-terminal material leaves plus
subtree-wide pending wait ids, excluding volatile timestamps while
retaining them in wake context.
- Added nullable observed/reviewed JSONB stop snapshots and shrink-only
reviewed-state suppression with legacy exact-fingerprint fallback.
- Added pending interaction kinds and approval ids to watchdog wake
context, review comments, and comment metadata.
- Added classifier and scheduler coverage for waiting-leaf liveness,
metadata stability, sibling shrink suppression, material changes,
snapshot promotion, legacy rows, and unchanged idempotency keys.
## Verification
- `pnpm --filter @paperclipai/server exec vitest run
src/__tests__/task-watchdogs-classifier.test.ts
src/__tests__/task-watchdogs-scheduler.test.ts` — 2 files, 36 tests
passed.
- `pnpm --filter @paperclipai/server typecheck` — passed.
- `git diff --check origin/master...HEAD` — passed.
## Risks
- Fingerprint version 2 intentionally re-fingerprints every currently
stopped watched tree once after deployment, causing a one-time wake
burst before the new reviewed snapshots are established.
- Migration `0191_task_watchdog_stop_snapshots.sql` only adds two
nullable JSONB columns with no backfill; legacy rows continue
exact-fingerprint behavior until a post-deploy review promotes a
snapshot.
- PR #9452 edits the same service file; whichever lands second may need
a trivial rebase.
> 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
- OpenAI Codex, exact model ID `gpt-5.6-sol`, high reasoning mode, with
repository tool use and code execution. The runtime did not expose a
context-window size.
## 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
- [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>
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