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ci_tier_check: accepted limits (matrix include/exclude, run-script expressions, aggregator || true, schedule) — fix only if seen in practice

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Active
Tech stack
c, shell
Domain
ci-cd, tooling

Research direction

The issue describes edge cases in the CI tier checker script at tools/ci_tier_check.sh. Start by understanding the script's logic and the specific GitHub Actions constructs it validates (matrix includes/excludes, run-script expressions, aggregators, schedules). Review the linked PR #1273 and issue #1275 for context. 'Done' means adding detection for one of these patterns only if it appears in a real workflow, not preemptively.

Written by the indexing model from the issue text.

Description

area:ci found-by:critic kind:gate-defect

Accepted limits of tools/ci_tier_check.sh after #1273, filed per the out-of-scope and one-layer rules (#1275). Each is a constructed mutant of the checker, and none has an instance in the real workflows today. Fix one only if it ever occurs in practice; until then, code review covers it.

  1. Matrix include/exclude: an include: [{os: macos-15-intel}] adds a leg that is not required and is not flagged (the original #1264 macOS shape); an exclude of a required leg means that check never reports. Repro: /tmp/astra-1264A-r2/ round-2 evidence (see #1273).
  2. The stale-waiver check (step-output waivers pinned by hash) has no selftest plant.
  3. ${{ }} expressions inside run: scripts, runs-on and container are not judged.
  4. An aggregator whose script ignores a failed worker (|| true), and a schedule: trigger on ci.yml: code-review concerns by design (#1273 round-2 scope cut).
Dominant language
C
Stars
3
Forks
7
Avg merge
3h 56m
Merged PRs (30d)
102

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