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U13. Turns the U1 instrument into a regression gate: `--check` asserts the
measured projection against a committed baseline, `--update-baseline` rewrites
it, and the benchmarks job runs the check.
Gated exactly, not budgeted. Two consecutive runs are byte-identical, so a
tolerance band would only hide real movement. Adding fixtures moves these
numbers and forces a rebaseline; that treadmill is the accepted cost of the
guard and the same trade `bench/scope-capture` already makes.
Both arms are gated, because they fail differently:
countArm call-only drop totals, split by site kind and by extension. The
per-extension split makes a single-language regression legible
instead of arriving as a moved total.
shapeArm the state of each receiver spelling by edge presence. This is the
only arm that can see `?.`, explicit type arguments and
`repos[0].save()` — they emit no edge AND no drop, so a count-only
gate is blind to them by construction.
Verified in both directions. At baseline, `--check` passes. With a real drop
injected into the corpus — `f!.make().persist()`, not a hand-edited baseline —
it fails and localizes:
countArm.callDrops: 99 -> 100
countArm.bySiteKind.call: 99 -> 100
countArm.callDropsByExtension..ts: 7 -> 8
Unlike its neighbours in that job this bench is NOT build-free: it runs the real
pipeline, so it needs dist/, which the setup action already builds. One run is
~2m15s against a 25-minute job budget that already carries eight steps — worth
watching on the first CI run rather than pre-emptively raising the timeout on a
guess.
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| .. | ||
| build-tree-sitter-prebuilds.yml | ||
| ci-devcontainer.yml | ||
| ci-e2e.yml | ||
| ci-quality.yml | ||
| ci-report.yml | ||
| ci-tests.yml | ||
| ci.yml | ||
| claude.yml | ||
| codeql.yml | ||
| commit-fork-prebuilds.yml | ||
| dependency-review.yml | ||
| docker.yml | ||
| gitleaks.yml | ||
| gitnexus-review-agent.yml | ||
| gitnexus-skill-evolution.yml | ||
| grammar-update-monitor.yml | ||
| impact-pdg-mutation-report.yml | ||
| pr-autofix-apply.yml | ||
| pr-autofix-publish.yml | ||
| pr-autofix.yml | ||
| pr-description-check.yml | ||
| pr-labeler.yml | ||
| publish.yml | ||
| scorecard.yml | ||
| skill-sync.yml | ||
| tree-sitter-upgrade-readiness.yml | ||
| triage-sweep.yml | ||
| trivy.yml | ||
| workflow-lint.yml | ||