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PaperClipAI/scripts
DottaandClaude Opus 5.5 6ed6b0754b perf(recovery): probe recovery source runs and stale-continuation runs by key (#20584)
## Thinking Path

> - Paperclip is the open source app people use to manage AI agents for
work
> - The workspace recovery worker saves the files of failed runs. After
each pass, it reads the time of its next deadline
(`nextWorkspaceRecoveryAt`)
> - That read finds the source run, its finalizer and its leases with
`id::text = evidence->>'runId'`. A text comparison cannot use a key.
Each exhausted hold read every run, finalizer and lease of its company
> - On a hosted staging database this statement used about 4 s per call
(21 calls in the sample window). The cost grows with exhausted holds
multiplied by the company's run count
> - The ownership reconciler's stale-continuation check
(`checkStaleDroppedComments`) has the run lookup shape that #20412 fixed
in the lost-wake check: one OR across the legacy context and the native
column
> - This pull request compares the run id as a canonical uuid, and it
gives the stale-continuation check the per-binding run probes from
#20412
> - The benefit is the same recovery decisions with index-driven work:
11 s to 93 ms for the deadline read on a representative local fixture

## Linked Issues or Issue Description

Refs #20412

**What happened?**

The workspace recovery deadline read was one of the most expensive
statements that remained on a hosted staging database after the fixes in
#20393, #20405, #20386, #20412, #20391 and #20400. Query statistics
showed about 4 s per call. The statement text starts with `select case
when (issue_recovery_actions.…`.

The statement evaluates the retained-source fallback and stop-proof
conditions for each recovery action. These conditions read the source
run (`heartbeat_runs`), its finalizer (`native_run_finalizations`) and
its leases (`environment_leases`) with `x.id::text =
evidence->>'runId'`. The cast prevents the use of the primary key.
PostgreSQL reads all rows of the company for each exhausted hold. The
worker's discovery (`retainedWorkspaceCandidates`) uses the same
conditions.

The stale-continuation check matched a task's runs with
`(context_snapshot->>'issueId' = issue OR native_issue_id = issue)`.
With the OR, PostgreSQL can join runs only by company. It also hashed
every wake request of the company for the stale-wake test.

**Expected behavior**

Each condition uses a key lookup. The worker and the reconciler make the
same decisions for the same saved state.

**Steps to reproduce**

1. Seed a company with a deep run history and a few thousand workspace
recovery actions. Let a few hundred be exhausted holds that stay active.
2. Call `nextWorkspaceRecoveryAt`.
3. The call takes seconds, and its time grows with holds multiplied by
runs. The benchmark below shows this.

**Paperclip version or commit**

Baseline: `8d2bf78323`.

**Deployment mode**

Server with PostgreSQL. The local proof uses disposable PostgreSQL 18.1.
Staging uses hosted PostgreSQL.

## What Changed

- `workspace-recovery-fallback-discovery.ts`: the source run, finalizer
and lease probes compare `id =
canonicalExecutionUuid(evidence->>'runId')`. The helper returns null
unless the text is the canonical lowercase uuid form. Thus the probe
matches exactly the rows that `id::text = evidence->>'runId'` matched.
The helper already exists in `execution-identity.ts`.
- `nextWorkspaceRecoveryAt` and worker discovery use these conditions.
Their SQL changes only in these probes.
- `checkStaleDroppedComments` reads in two stages. The first stage keeps
comments that a stale-continuation cancellation dropped and that no open
wake carries. The second stage applies the run probes. The run probes
use the `taskRuns` helper from #20412, which is now shared by both
checks. The stale-wake lookup ends with `offset 0`, so it stays a
per-comment index probe.
- The final `order by c.created_at limit N`, the projection and the
delivery check after the query do not change.
- Add `scripts/benchmark-recovery-status-checks.ts`. It loads the
changed files from an explicit baseline commit and from the working
tree. Before it records time, it compares every changed condition for
every recovery action, the complete service results and the positional
SQL rows.
- Add tests: each run binding in the stale-continuation check (native,
legacy, live run on either binding, wrong agent, wrong company, failed
run, run outside the comment time, closed by a person, open wake). Also
a test that a hold with a non-canonical saved run id is not discovered,
as before.
- Document both checks and the benchmark in `doc/DATABASE.md`.
- No schema change, index, migration, or new startup work.

## Verification

- `pnpm exec vitest run
src/__tests__/ownership-reconciliation-report.test.ts
src/services/workspace-recovery-fallback.test.ts
src/services/workspace-recovery-stop-proof.test.ts
src/__tests__/heartbeat-held-comment-wake.test.ts --maxWorkers=1` (from
`server/`).
- `pnpm --filter @paperclipai/server typecheck`.
- `pnpm --filter @paperclipai/server exec tsx
../scripts/benchmark-recovery-status-checks.ts --baseline-ref=8d2bf78323
--samples=7`

Benchmark setup: PostgreSQL 18.1 (embedded, local), `shared_buffers` 128
MB, `work_mem` 4 MB. All data is synthetic, with md5-hex filler. Each
fixture has two companies (full size and a quarter). Two warmup rounds,
then 7 timed samples for each arm, in alternating order. Each sample
runs the real service function and asserts the same result. These are
local SQL measurements on a shared machine, so the spread is wide.

Workspace recovery deadline (`nextWorkspaceRecoveryAt`). About 8% of
actions are exhausted holds that stay active. Some actions save a
non-canonical (uppercase) run id. Before timing, the benchmark compares
six conditions (fallback pending, due time, due; re-arm pending, due
time, due) for every action of the fixture.

| Fixture | Runs / actions / pending holds | Baseline median (min–max) |
Treatment median (min–max) | Shared buffers |
| --- | --- | --- | --- | --- |
| small | 6,500 / 255 / 36 | 50.9 ms (47–76) | 6.8 ms (6–8) | 19,133 →
1,075 |
| representative | 78,750 / 3,813 / 588 | 11,098 ms (8,277–12,790) | 93
ms (35–145) | 3,493,417 → 24,902 |
| deep history | 191,250 / 3,813 / 588 | 40,146 ms (31,190–52,521) | 40
ms (36–230) | 13,491,792 → 26,911 |

Stale-continuation check (`checkStaleDroppedComments`). The fixture is
pessimistic: more than half of recent comments on done tasks have a
stale cancelled wake. The table shows statement time from `EXPLAIN
ANALYZE` with default settings, and one statement run with
`enable_nestloop = off` (the company-only hash plan). The result is
checked as equal in both modes.

| Fixture | Runs / recent comments / reported | Statement, baseline →
treatment | Hash plan, baseline → treatment |
| --- | --- | --- | --- |
| small | 3,792 / 76 / 24 | 3.2 → 1.5 ms | 5.5 → 3.8 ms |
| representative | 75,406 / 1,125 / 200 (limit) | 34 → 26 ms | 66 → 25
ms |
| busy hour | 152,031 / 5,625 / 200 (limit) | 328 → 153 ms | 2,302 → 165
ms |

- Neutral path: the complete stale-continuation service call stays about
the same (busy hour 750 → 655 ms median). The per-comment delivery check
after the query (`deliveredQueuedCommentIds`) is most of that time. This
change does not touch it.

## Risks

- Low risk. Every predicate keeps the same logic. Only the probe shape
and the evaluation order change. The benchmark compares each changed
condition for every recovery action, including non-canonical saved run
ids, and the complete results of both checks.
- Previous-release story: no saved state, schema or identity changes.
Holds saved by older releases are read with the same rules, so they
carry forward unchanged.
- Rows with the same comment `created_at` have no defined order, as
before.

## Model Used

- Claude Opus 5.5 (`claude-opus-5-5`), Anthropic, used through Claude
Code with tool use (shell, file edits, local PostgreSQL).

## 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 11:12:41 -06:00
..
2026-04-09 06:14:12 -05:00