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Reduce redundant CI runs, pnpm uploads, and fixture startups (#23145)

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* Reduce redundant CI runs, store uploads, and fixture processes

* Avoid repeating draft-independent mobile checks on readiness

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Co-authored-by: m4air <m4air@m4airs-Air.localdomain>
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OrcaWin
2026-09-26 01:17:51 -07:00
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co-authored by m4air
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# CI efficiency and runner capacity
## Four follow-up changes
- Keep the readiness event, but reuse required checks only after an Actions API
lookup proves that the same PR head, tested merge commit, and workflow commit
already completed successfully. A changed base, missing proof, failed lookup,
or still-running check falls back to the full checks. Advisory tests retain
their normal readiness routing. The mobile and line-count workflows have no
draft-dependent work, so they no longer run again when a draft becomes ready.
- Route the Bun matrix using the actual headless build and selected tests'
transitive imports, with conservative inclusion for dynamic workers, native
inputs, fixtures, and toolchain changes. A graph failure runs the full matrix;
manual dispatch still runs all ten platform jobs. The shared test selectors
retain the same 85 files. Unrelated shard timings and mobile-test tooling can
skip the matrix; shared shortcut definitions remain real runtime dependencies
and still run it. Building the graph does not execute the imported modules.
- Restore pnpm stores on PRs using setup-node's existing key and store path,
without publishing more PR-private copies. Non-PR setup-node caching and
native/TypeScript caches keep their existing behavior. A missing main store
still installs with the frozen lockfile. The mixed root/mobile store may miss
repeatedly because the existing main warmer only seeds the root lockfile.
- Batch only the PowerShell quota-fixture reservations within each test, using
the original generated scripts in fresh local scopes. Commands under test
retain separate processes, real file identities, and existing race assertions.
A traced local run confirms 44 PowerShell starts become 24, with all 21 cases
passing. Alternating after/before/after elapsed times were 50.00/59.28/37.00
seconds on a shared macOS arm64 host; that variance does not justify a precise
percentage or hosted runner-time claim. Test budgets and worker counts are
unchanged.
The reproducible pnpm-store comparison is
`ORCA_BACKGROUND_LAUNCH=1 node config/scripts/ci-pnpm-store-benchmark.mjs --samples=3`.
On macOS arm64 with BSD tar, three alternating fresh-store pairs eliminated a
median 332,746,995-byte archive per miss. Median install time was 17.33 seconds
before and 16.94 after; the removed archive step alone took 53.51 seconds.
Those local disk/CPU measurements exclude uploads and are not a prediction of
Linux or Windows hosted savings. Restore cost is common to both policies.
## September 26 verification
[PR #23053](https://github.com/stablyai/orca/pull/23053) was merged before its