CI det-policy hardening

[flyingrobots]

Migrated from Method backlog

This issue was created from a legacy filesystem backlog card. GitHub Issues are now the live work tracker; repository docs remain Method evidence.

Source backlog: docs/method/backlog/asap/PLATFORM_ci-det-policy-hardening.md
Original lane: asap
Original legend: PLATFORM

Original backlog card

CI det-policy hardening

Harden the determinism classification CI pipeline.

Status: active and partially implemented.

• Unit tests for classify_changes.cjs and matches() (CI: Add unit tests for classify_changes.cjs and matches() #286, open)
• Auto-generate DETERMINISM_PATHS from det-policy.yaml DET_CRITICAL
  entries (CI: Auto-generate DETERMINISM_PATHS from det-policy.yaml DET_CRITICAL entries #285, completed in .github/workflows/det-gates.yml)
• Per-crate gate overrides in det-policy classification system (CI: Per-crate gate overrides in det-policy classification system #284, open)

The remaining open pieces are still tightly coupled: script tests make the
classifier safe to change, and per-crate overrides are the next precision step
after the broad scripts/** fail-safe.

[coderabbitai]

🔗 Related PRs

#95 - PR-04: ci matrix (glibc+musl) + macOS manual workflow [merged]
#209 - docs: math validation plan refresh + docs audit memo (#208) [merged]
#283 - feat: TTD Hardening Sprint S1 — Gates and Evidence Integrity [merged]
#309 - feat: add Doghouse PR flight recorder [merged]
#388 - docs(method): add backlog cards and hook failure note [merged]

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