The 'CI timing report' job is pure observability — it collects per-job/step
durations from the GitHub API after the run and publishes an HTML gantt
report + PR-vs-main timing diff. It gates nothing (all-checks-pass does not
include it), yet it could redden a PR: the script makes dozens of paginated
API calls with the shared repo GITHUB_TOKEN and had zero retry handling, so
a single 403 (rate-limit burst when several PRs run CI concurrently) failed
the job. Observed twice in a row on PR #59805.
- api_get(): retry 403/429/5xx and connection errors with exponential
backoff, honoring Retry-After / X-RateLimit-Reset (max 5 attempts, 120s
cap). Non-transient statuses (404 etc.) still fail fast.
- main(): exhausted retries raise TimingsUnavailable, caught to emit a
degraded summary line + placeholder HTML artifact and exit 0 — a metrics
collector must never fail the PR's checks. No timings JSON is written on
the degraded path so an empty baseline can never be cached.
- ci.yml: baseline-save steps on main skip gracefully when no JSON exists.
Verified with a mocked urlopen harness: retry-then-success (3 attempts),
exhausted-retries -> TimingsUnavailable, 404 fails fast without retry,
degraded main() exits 0 with summary + placeholder and no JSON, and the
--from-json happy path is unchanged.
fixes stacked PRs no-checks bug where
main < a < b
a merges into main
b is retargeted to main
but b doesn't run checks since it's not considered a new pr to main
now b will simply already have passing ci :)
ci: centralize path-gating behind single orchestrator + all-checks-pass
gate
Replace the scattered per-workflow detect-changes pattern with a single
ci.yml orchestrator that runs the classifier once, then conditionally
calls sub-workflows via workflow_call based on lane outputs. A final
all-checks-pass job (if: always()) aggregates all results so branch
protection only needs to require one check.
Changes:
- New .github/workflows/ci.yml orchestrator (detect + conditional calls
+ all-checks-pass gate)
- Extend classify_changes.py with scan/deps/mcp_catalog lanes, absorbing
supply-chain-audit's internal changes job
- Update detect-changes/action.yml to expose the new lane outputs
- Convert all 10 PR-gated sub-workflows to workflow_call-only triggers,
removing their push/pull_request triggers and per-step detect-changes
guards (gating now happens at the orchestrator level)
- lint.yml + supply-chain-audit.yml receive event_name as a
workflow_call
input to replace github.event_name (which is "workflow_call" inside
called workflows)
- supply-chain-audit.yml: remove internal changes job + *-gate jobs
(orchestrator handles gating, booleans arrive as inputs)
- contributor-check.yml: remove internal filter step
- Update test_classify_changes.py for 6-lane output + new supply-chain
test cases
