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Author	SHA1	Message	Date
Devin FoleyandClaude	ce7dedf33d	perf(ci): balance general-server test shards by recorded suite duration (#9516) ... ## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work > - Its PR CI runs the general-server vitest lane pinned to `maxWorkers=1` and sharded across 3 runners (introduced in #8360) > - Suites were assigned to shards round-robin by sorted file index, so shard test time was unbalanced: a recent PR run split 73s / 153s / 115s, and the heaviest shard made "General tests (server 2/3)" the slowest check in the whole workflow at 314s wall > - The slowest shard sets the lane's wall time, so unbalanced partitions waste the other two runners and stretch the PR critical path > - This pull request replaces the round-robin assignment with a deterministic longest-processing-time partition weighted by a checked-in per-suite duration manifest > - The benefit is near-even shard weights (projected 113s / 113s / 113s with the current manifest), taking roughly 40s off the PR critical path with no reduction in coverage ## Linked Issues or Issue Description - Refs #8360 (introduced the 3-way general-server sharding this PR rebalances) - No public issue exists. Problem: the general-server test lane's round-robin shard assignment ignores per-suite duration, so one shard can carry multiple 30s+ suites while another finishes in half the time; the slowest shard alone determines the check's wall time. ## What Changed - `scripts/general-server-shard.mjs` (new): manifest loader and deterministic LPT (longest-processing-time) partitioner; suites missing from the manifest get the median recorded weight, and a missing or malformed manifest degrades to uniform weights so the lane never fails on stale data - `scripts/general-server-shard-durations.json` (new): per-suite duration manifest sampled from a real PR run (240 suites); the `$comment` field documents how to regenerate it - `scripts/run-vitest-stable.mjs`: both shard-selection sites (run and `--dry-run`) now use the balanced partition instead of index round-robin - `scripts/__tests__/run-vitest-stable-shard.test.mjs`: 6 new tests covering skew-balance vs round-robin, determinism, median fallback for unlisted suites, malformed-manifest degradation, manifest coverage of the current suite set, and real-partition balance - `server/src/__tests__/heartbeat-issue-rewake-throttle.test.ts`: hardened the `afterEach` sweep — post-run bookkeeping (run-event records, follow-up wake scheduling) can still insert rows briefly after a run reaches a terminal status, and a late insert landing between the `agent_wakeup_requests` and `agents` deletes failed teardown with a foreign-key violation on the first CI attempt of this PR; the sweep now retries so a late background write cannot take down the shard - `release-verify.yml` shares the same runner script and inherits the balancing with no workflow change ## Verification - `node --test scripts/__tests__/run-vitest-stable-shard.test.mjs` — 9/9 pass (run against current master) - `npx vitest run src/__tests__/heartbeat-issue-rewake-throttle.test.ts` — 6/6 pass against embedded Postgres with the hardened teardown - `node --test scripts/__tests__/release-verify-workflow.test.mjs` — 2/2 pass - `node scripts/run-vitest-stable.mjs --dry-run` with each shard flag shows every suite assigned exactly once across the 3 shards, with projected weights ~113s each ## Risks - Low risk: partition changes which runner executes which suite, not what runs; a completeness test asserts every suite is assigned to exactly one shard - The duration manifest will drift as suites are added/changed; unlisted suites get the median weight and a coverage test flags when the manifest covers less than half the suite set, so drift degrades balance gracefully rather than breaking the lane > 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 - Claude Fable 5 (`claude-fable-5`, Anthropic), extended thinking enabled, agentic tool use (file edits, shell, test execution) via Claude Code ## 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 --------- Co-authored-by: Claude (Paperclip SWE) <noreply@paperclip.ing>	2026-07-13 12:25:54 -07:00
Devin FoleyandPaperclip	2853a9ae69	perf(ci): shard the general-server test lane across 3 runners (#8360) ... ## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work > - Every PR runs the `PR` GitHub Actions workflow, whose `verify` gate fans out into parallel test lanes (general tests, serialized server route suites, build, typecheck) > - The `General tests (server)` lane had grown into the run's critical path: it executed all ~213 non-route server suites serially in a single job (~7.2m of test time), more than 2x any other job > - It runs serially because `server/vitest.config.ts` pins `maxWorkers: 1`, so server suites cannot parallelize within a single runner — the only lever is spreading them across runners > - This pull request shards that lane into 3 even partitions that run on separate runners, mirroring the 4-way sharding already used for the serialized route suites > - The benefit is the lane drops from ~7.7m to ~2.4m/shard, cutting overall PR wall time roughly in half (~8.5m → ~4.2m) ## Linked Issues or Issue Description No public GitHub issue exists for this work, so the underlying issue is described inline following the feature-request template. ### Problem or motivation PR CI wall time had crept back up to ~8.5m. On a recent fully-green run, the `General tests (server)` job took 7.72m — more than double any other job and the clear critical path. Of that, 7.23m was pure test execution (dependency install was a cached 0.27m). The job ran all server suites that are not route/authz tests (213 files) one after another, because the server vitest project pins `maxWorkers: 1`, making these suites inherently serial within a single runner. ### Proposed solution Shard the general-server lane across 3 parallel runners — the same technique the route/authz suites already use — so the suite set is split into even, deterministic partitions that run concurrently. Add a regression test that proves the shards always cover the full suite set with no gaps or overlap. ### Alternatives considered - **Raise `maxWorkers` for the server project** to parallelize within one runner — rejected: the server suites share process-level state (DB/port), which is exactly why `maxWorkers: 1` is pinned. - **Two shards instead of three** — would leave the lane at ~3.6m, still above the next bottleneck (Canary Dry Run, ~4.1m wouldn't be the gate). Three lands the lane comfortably below it. - **Do nothing / accept the slow lane** — rejected: it gates every PR. ### Roadmap alignment Developer-experience / CI tooling. Not core product roadmap work; does not overlap with planned features in `ROADMAP.md`. ## What Changed - `scripts/run-vitest-stable.mjs`: the `general-server` general-test group now accepts `--shard-index` / `--shard-count`. It enumerates the full server test set (the whole `server/src` tree, minus the route/authz suites that already run in their own serialized shards) and splits it deterministically by modulo. The non-sharded local invocation (`pnpm test:run:general --group general-server`) is unchanged. - `.github/workflows/pr.yml`: the `general_tests` matrix runs `general-server` as 3 parallel shards (1/3, 2/3, 3/3). Workspace groups are unchanged. The `verify` gate already aggregates the whole matrix result, so the required check name is unaffected. - `scripts/__tests__/run-vitest-stable-shard.test.mjs`: a `node:test` suite asserting the 3 shards form a complete, non-overlapping partition of the general-server set, that no route/authz suite leaks into it, and that shard flags are rejected for the parallel workspace groups. Wired into the `policy` job. ## Verification - New partition test passes locally: `node --test ./scripts/__tests__/run-vitest-stable-shard.test.mjs` (3/3). - Confirmed the 3 shards form a complete, non-overlapping partition of all 213 files (71/71/71). - Ran a live thin shard (3 real server suites, including one outside `__tests__`) — 23 tests passed, confirming positional-include execution works end to end. - This PR's own CI is the authoritative check: all three `General tests (server (n/3))` jobs went green on the prior run, collectively covering every suite the old single job ran. ## Risks - Low risk. No product code changes — only test orchestration and CI matrix. Shard partitioning is deterministic and is now covered by an automated test that fails if the partition ever develops a gap or overlap. Modulo-on-sorted-filenames balances duration reasonably, matching the approach already proven by the serialized route shards. ## Model Used - Claude (Anthropic), `claude-opus-4-8`, extended thinking + tool use (agentic coding via Paperclip). ## 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 - [ ] If this change affects the UI, I have included before/after screenshots (N/A — no UI change) - [x] I have updated relevant documentation to reflect my changes (inline comments explain the sharding rationale) - [x] I have considered and documented any risks above - [ ] All Paperclip CI gates are green (pending this PR's run) - [ ] Greptile is 5/5 with no open P2s, recommendations, or follow-ups (pending review) - [x] I will address all Greptile and reviewer comments before requesting merge Co-authored-by: Paperclip <noreply@paperclip.ing>	2026-06-19 19:22:17 -07:00