Tom Boucher 571d7b5a1c feat(#764): skip cross-platform test matrix for docs-only and inert-CI PRs (#798) ...

test.yml had no paths filter and the ci-test-scope classifier treated docs/
and every .github/workflows/* as code_changed, so documentation edits and
product-irrelevant automation tweaks still spun up the full Linux/Windows/macOS
matrix. Narrow the heavy matrix to changes that can actually affect the product
or the test pipeline.

- ci-test-scope.cjs: drop docs/ from code_changed (docs-only -> full skip; the
  required-tests fan-in still reports green). Add src/ to code_changed (it was
  missing -> a source-only PR previously skipped all tests). Add INERT_WORKFLOWS
  allowlist + isInertCi() + an "inert CI" rule, and a product_changed output that
  gates the heavy test/coverage jobs. Fail-safe: any workflow not on the inert
  allowlist defaults to the full matrix. A module-load assertion throws if a
  PROTECTED_WORKFLOWS entry (test/install-smoke/mutation/security-scan/release)
  is ever added to the inert set, so a weakening edit fails CI loudly.
- test.yml: keep the static 3-lane matrix (so the H1 shell-policy linter can
  still statically verify the Windows lane), gate test/coverage on
  product_changed, add a lightweight ubuntu-only test-inert job, and branch the
  required-tests fan-in on product_changed.
- docs-required.yml: run docs-parity-live-registry (gated on docs/ changes) so
  pure-docs PRs still catch live-registry drift without the matrix.
- tests: cover docs-only, inert-only, src/, pipeline, unknown-workflow fail-safe,
  mixed escalation, the code_changed=false -> no-lanes invariant, and protected-
  workflow tamper-evidence.

Closes #764

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

2026-06-07 11:46:48 -04:00

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