fix(ci): point pnpm at the runner image's baked store instead of the Actions cache - #1400
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…Actions cache Console UI installs (ui_quality, ui_e2e, ui_artifact) were paying for an exact-key Actions-cache restore on every PR run and getting nothing for it: `Cache hit for: ...`, ~456 MB restored successfully, then `Progress: resolved 688, reused 0, downloaded 688` on install. Every run did a fully cold install anyway. Root cause: these jobs run in a container, and GitHub fixes $HOME to /github/home inside containerized jobs (not the image's baked /home/runner). pnpm's default store-dir resolution, and a plain `HOME=/home/runner` override, both fail to find the store from in there. Separately, restoring ~/.pnpm-store from the Actions cache reports a hit but the files don't land where pnpm looks for them either -- the cache path is broken independent of the store-dir issue. The runner image already bakes a full, warm pnpm store at /home/runner/.local/share/pnpm/store (mesh-llm-runner-images scripts/warm-dependencies.sh), confirmed present and readable on disk in-container. Pointing `store-dir` at that literal path directly (no HOME indirection, no Actions cache) gives a fully warm install: resolved 688, reused 688, downloaded 0. Wall clock for the affected steps drops from ~25s (8s restore + 17s cold install) to ~11s (1s config + 10s warm install) per pnpm job, and there's no cache to publish, restore, or race, so this also removes the ui_artifact restore-with-no-publisher race (three lanes restored a key only ui_quality ever saved). Also removes the now-dead CACHE_NAMESPACE env block from both files (no remaining consumer) and updates the manage-ci inventory, ci/ci.md, and the contract test that pinned the old cache-publisher shape.
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Included review availability: Your plan provides up to 8 included reviews per hour; 7 remain after this review. 📝 WalkthroughWalkthroughContainerized UI jobs now use the runner image’s baked pnpm store at ChangesContainerized UI dependency storage
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: ⚪ Minimal · up to The PR switches the affected CI jobs to the runner image’s baked pnpm store and removes the ineffective Actions-cache path, improving install reuse and eliminating the cache race; no actionable merge-blocking risk remains after normal checks and review. Suggested reviewers: 🚥 Pre-merge checks | ✅ 3 | ❌ 2❌ Failed checks (2 warnings)
✅ Passed checks (3 passed)
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Inline comments:
In `@scripts/tests/test_pr_workflow_artifacts.py`:
- Around line 253-262: Extend the assertions in the relevant test method to
verify the baked pnpm store configuration: assert one occurrence in
ci-ui-artifact-slice.yml and two occurrences in ci-web-slice.yml, each setting
store-dir to /home/runner/.local/share/pnpm/store for ui_artifact, ui_quality,
and ui_e2e. Keep the existing cache-removal assertions unchanged.
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.agents/skills/manage-ci/references/current-inventory.md.github/workflows/ci-ui-artifact-slice.yml.github/workflows/ci-web-slice.ymlci/ci.mdscripts/tests/test_pr_workflow_artifacts.py
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… contracts Nick's review on PR #1400 asked for test_pr_workflow_artifacts.py to assert the store-dir config's occurrence counts, which it didn't cover before. While validating that, full `unittest discover` (the command CI's contracts job actually runs, not the single-module command the PR description checked) turned up two other contract tests this branch had broken: test_ci_artifact_actions.py's central native-cache-policy audit and test_ci_workflow_artifacts.py's UI-cache assertion both still expected actions/cache/restore@ and actions/cache/save@ markers that this fix deleted. Updated both to match the current baked-store mechanism instead of the old Actions-cache one. python3 -m unittest discover -s scripts/tests -p 'test_*.py': 516 tests, OK (skipped=7).
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Inline comments:
In `@scripts/tests/test_ci_workflow_artifacts.py`:
- Around line 178-184: Add negative assertions in the relevant UI and web
workflow checks alongside the existing actions/cache assertions to reject
setup-node cache markers “cache: pnpm”, “cache: npm”, and the stale
CACHE_NAMESPACE configuration. Keep the pnpm store-dir assertions and direct
actions/cache checks unchanged.
In `@scripts/tests/test_pr_workflow_artifacts.py`:
- Around line 263-268: Update the test around store_dir_config so it extracts
the ui_quality and ui_e2e job blocks from website before asserting counts.
Require exactly one baked-store configuration in each job, rather than counting
both occurrences across the complete YAML file.
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scripts/tests/test_ci_artifact_actions.pyscripts/tests/test_ci_workflow_artifacts.pyscripts/tests/test_pr_workflow_artifacts.py
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- assert no cache: pnpm/npm or CACHE_NAMESPACE regressions in the UI and web slices, not just uses: actions/cache absence - scope the baked-store publisher count to the ui_quality/ui_e2e job blocks instead of counting across the whole website workflow file, so a miscount between the two jobs can no longer pass
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Inline comments:
In `@scripts/tests/test_ci_workflow_artifacts.py`:
- Around line 183-190: Update the cache assertions in the test covering the ui
and web workflow contents so they reject pnpm and npm cache values whether
quoted or unquoted. Use YAML-aware parsing or matching that accepts both single-
and double-quoted forms while preserving the existing checks for actions/cache
and CACHE_NAMESPACE.
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scripts/tests/test_ci_workflow_artifacts.pyscripts/tests/test_pr_workflow_artifacts.py
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CodeRabbit review on #1400: the plain substring checks only caught unquoted `cache: pnpm`/`cache: npm` and would let `cache: "pnpm"` or `cache: 'npm'` slip through, silently re-enabling setup-node's dependency cache. Switch to a regex that matches quoted and unquoted forms.
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Original problem
Closes #1392.
The three Console UI pnpm jobs (
ui_quality,ui_e2einci-web-slice.yml,ui_artifactinci-ui-artifact-slice.yml) restored an exact-key Actions cache on every PR run and got nothing for it — a 456 MB cache hit, then a fully cold install right after:Separately,
ui_artifactrestored that same cache key with no publisher of its own — it andui_quality/ui_e2eonly share aneeds: runner_policydependency, so on any lockfile-hash change it racedui_quality's save in a different top-level workflow run.Diagnostics
Root-caused with a throwaway
on: push+workflow_dispatchharness against this branch (mirroring the pattern from #1380), since these slice files are pinned@mainby the lane workflows and a PR editing them isn't exercised by its own required checks.$HOMEto/github/home, andfind "$(pnpm store path)"right after a "successful" restore came backNo such file or directory.HOME=/home/runneroverride to point at the image's baked store didn't work either — pnpm's config resolution doesn't follow that override the way it does on a bare runner (pnpm config get store-dirprinted the literal string"undefined")./home/runner/.local/share/pnpm/store/v10, 917 MB, frommesh-llm-runner-imagesscripts/warm-dependencies.sh. So the HOME-override failure was pnpm's own resolution, not missing content.Fix
Point
store-dirat that literal baked path directly — noHOMEindirection, nopnpm store pathrecomputation, no Actions cache:pnpm config set store-dir /home/runner/.local/share/pnpm/storeApplied to all three pnpm jobs; the
Configure isolated pnpm store/Restore pnpm store/Save pnpm storesteps and the now-deadCACHE_NAMESPACEenv are removed from both files. With no cache to publish or restore, this also removes theui_artifactrace described above — there's nothing left for it to race against.Also updates the
manage-ciinventory,ci/ci.md's cache table, and the contract test (test_pr_cache_publishers_are_exact_and_bounded) that pinned the old cache-publisher shape.Before → after, same job (
ui_quality), from the validation harness:reused 0, downloaded 688reused 688, downloaded 0Confirmed
reused 688, downloaded 0across all three affected jobs (ui_quality,ui_e2e,ui_artifact) on the final commit, via a second throwaway harness job callingci-ui-artifact-slice.ymldirectly (it's only otherwise reachable through the full Linux/macOS/Windows native lanes).No cross-repo change needed — this uses the already-pinned image digest as-is.
Validation
python3 -m unittest scripts.tests.test_pr_workflow_artifacts— 15/15 pass, including the updated cache-publisher contract test.ui_quality,ui_e2e, andui_artifactall showreused 688, downloaded 0on the head commit.Summary by CodeRabbit
CI Improvements
Documentation
Tests