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DottaandClaude Opus 5.5
99edcd28a7
## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work > - The attention retention worker archives old "Needs you" items, such as open decisions, pending questions, failed runs and items in review > - To find its work, the worker reads a page of retention candidates. It reads one page per changed scope, and one single-source read for each check of a due item > - On a hosted stack this candidate read ran 2,835 times at about 1 s per call, 4,201 s of database time in one afternoon window > - The read built every candidate of every kind before it applied the keyset limit. Its company and source filters used the `param is null or column = param` form. Under a generic prepared plan these filters cannot use an index. The failed-run branch also matched retry receipts with a bound LIKE parameter, so it could not use the partial index `heartbeat_run_events_retry_exhausted_idx` > - This pull request reads each kind in its own branch, puts every filter into that branch, and limits each branch to one page > - The benefit is a bounded read for each page, and a primary-key read for each single-source check, with the same rows, order and cursors ## Linked Issues or Issue Description **What existing behavior does this improve?** The attention retention candidate scan in `server/src/services/attention-retention.ts`. **Subsystem affected** Server: attention retention background work (database reads only). **Current behavior** Each page reads all candidates of all selected kinds, then sorts them and keeps 100. Optional filters use `($n is null or column = $n)`. A generic prepared plan cannot use an index for these filters. The single-source check compares `id::text`, so it cannot use the primary key. The retry receipt LIKE pattern is a parameter, so the plan cannot use the partial receipt index. **Proposed behavior** Each kind is one branch with its company, source, issue and keyset filters inside it and `limit 100`. Kinds before the cursor are not read. A source id filter uses the uuid primary key. The receipt pattern is a SQL literal that matches the partial index predicate. The page result does not change. Refs #20386 (adds the partial receipt index that this branch now uses). ## What Changed - `server/src/services/attention-retention.ts`: replace the single union scan with `candidateQuery`. Each source kind is a branch that has its own filters, retention join and one-page limit. The outer query still orders by `(source_kind, source_id)` and keeps 100 rows. - Only add a filter when the scope sets it. There is no `param is null or ...` form now. - A single-source read compares `id = $uuid`. It returns no rows for text that is not the canonical lowercase uuid form. The former `id::text = $text` comparison also never matched such text. - Skip the kinds that come before the keyset cursor kind. `ATTENTION_RETENTION_KIND_ORDER` holds the kind order, and a test checks it against the database collation. - The failed-run branch matches `'Bounded retry exhausted%'` as a literal, so it reads `heartbeat_run_events_retry_exhausted_idx`. - Export `listAttentionRetentionCandidates` for the test and the benchmark. The service uses it without a change in behavior. - New test `server/src/__tests__/attention-retention-candidates.test.ts`. It runs on real PostgreSQL and compares every page, row and cursor with the former scan (kept in the test as an oracle). It covers: one company, all companies, one kind, the blocker kind (which ignores retention), an unknown kind, issue scopes (including uppercase and malformed ids), exact source ids (uppercase, braces, no dashes, empty and malformed text return nothing), a `null` source id from a decoded scope, other-company isolation, inactive companies, kept and archived retention, and failed runs without a lifecycle receipt. - New benchmark `scripts/benchmark-attention-retention-candidates.ts`. It loads the baseline service from git, captures the SQL that each version sends for the same scopes, and times both under custom and generic plans. Each round alternates the order. It fails if the rows differ. - No migration. The existing indexes cover each branch: company and status indexes on each source table, the issues company/status index, and the partial receipt index from #20386. ## Verification - `cd server && npx vitest run src/__tests__/attention-retention-candidates.test.ts`: 10 passed. - `cd server && npx vitest run src/__tests__/attention-retention-work.test.ts`: see the note under Risks. - `cd server && npx tsc --noEmit`: pass. - Benchmark (local SQL measurement only): `pnpm --filter @paperclipai/server exec tsx ../scripts/benchmark-attention-retention-candidates.ts --baseline-ref=8d2bf78323` Embedded PostgreSQL 18.1. Fixture: 12 companies (1 large and 11 at 1/5 size), 38,400 issues, 64,000 runs, 1.29 M run events, 6,400 decisions, 9,600 interactions, 4,800 recovery actions, 7,534 retention rows. Seven samples for each scope, after two warmups, with `plan_cache_mode` forced to custom and then to generic. Rows were equal in every sample. | Plan | Scope | Rows | Before median (min–max) | After median (min–max) | Speedup | EXPLAIN shared blocks before → after | | --- | --- | --- | --- | --- | --- | --- | | generic | single source (check path) | 1 | 4.82 ms (3.81–5.88) | 0.19 ms (0.12–0.66) | 25× | 3,491 → 10 | | generic | company failed runs | 81 | 45.0 ms (40.5–51.7) | 2.9 ms (2.3–4.6) | 15× | 3,752 → 3,752 | | generic | company page 1 | 100 | 39.4 ms (30.1–63.7) | 7.6 ms (5.8–14.3) | 5.2× | 4,396 → 4,719 | | generic | company page 2 | 100 | 33.3 ms (31.2–38.1) | 6.9 ms (5.2–10.3) | 4.8× | 4,237 → 4,712 | | generic | company issue scope | 4 | 11.8 ms (9.8–24.0) | 4.1 ms (3.4–6.4) | 2.9× | 4,243 → 4,225 | | generic | all companies page 1 | 100 | 107.2 ms (100.2–116.0) | 29.3 ms (18.8–64.4) | 3.7× | 13,657 → 14,672 | | custom | single source (check path) | 1 | 2.68 ms (2.01–5.33) | 0.81 ms (0.65–1.50) | 3.3× | 3,491 → 10 | | custom | company failed runs | 81 | 5.7 ms (3.9–15.8) | 4.6 ms (3.2–7.1) | 1.2× | 3,752 → 3,752 | | custom | company page 1 | 100 | 11.7 ms (9.2–13.3) | 10.7 ms (9.4–19.5) | 1.1× (neutral) | 4,396 → 4,719 | | custom | company page 2 | 100 | 11.2 ms (7.6–14.2) | 10.1 ms (8.5–12.0) | 1.1× (neutral) | 4,237 → 4,712 | | custom | company issue scope | 4 | 10.9 ms (9.1–13.3) | 8.4 ms (6.4–10.4) | 1.3× | 4,243 → 4,225 | | custom | all companies page 1 | 100 | 21.3 ms (17.4–25.9) | 24.4 ms (20.3–72.0) | 0.9× (neutral) | 13,688 → 14,672 | - The timing connection uses named prepared statements, as the server does by default. The benchmark checks `pg_prepared_statements` before it collects samples, so the samples reuse the parsed statement. - The driver uses named prepared statements by default, so after five runs PostgreSQL can switch a statement to a generic plan. The generic rows are the relevant case for a busy server. Custom plans were already good for most scopes, and the change is neutral there. - Plan after the change (company page, generic): the failed-run branch reads the partial receipt index (13 blocks), then probes `heartbeat_runs` by primary key. The single-source check reads each primary key and the retention unique index (10 blocks in all). ## Risks - Low behavior risk. The test compares the new pages with the former query on the same data, including cursors in the middle of a kind and at kind boundaries. - Kind skipping depends on the order of kind names. Every kind name is different from the others before its first underscore, so C and linguistic collations give the same order. A test checks the order against the database. - The benchmark fixture is smaller than the hosted database. The hosted cost (about 1 s per call) is larger than the local baseline. I did not measure the hosted improvement. It needs a fresh query-statistics window after deploy. - On this loaded local machine, one full run of `attention-retention-work.test.ts` had 3 tests time out at 30 s (no-run issue finalization, no-run workspace finalization, and interaction create/withdraw). The same 3 tests pass when run alone. CI is the authority for this suite. ## Model Used - Claude Opus 5.5 (`claude-opus-5-5`), Anthropic. Agentic coding 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>