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ci: the lanes App installation token runs out under many concurrent PRs #15497
Description
Problem
On 2026-11-11/12 the CI installation token hit its hourly limit four times (per the hub session's count), failing every in-flight PR check with API rate limit exceeded for installation. Example: run 43143452524 (mark-lanes could not mark ci-lanes pending) and the CodeQL jobs in run 43143445098 on #15468. Recovery today is a manual gh pr update-branch per PR after the reset, and the kill switch CLAUDE_LANES_REPO_DISABLED stays on until then.
Expected
A burst of ~15 open PRs (the stamp-sweep batches plus their splits) completes CI without exhausting the token, or a run that hits the limit re-runs itself after the reset instead of failing ci-status.
Evidence to gather first
Calls per PR run by workflow (the lanes already log rate-limit headers, #8062), and which jobs spend most.
Related
Found during the Fable 5.2 adoption effort (Q11 stamp sweep, #15468).
Activity
kyle-sexton commentedon Nov 12, 2026
Recurred 2026-11-12 03:32-03:34 UTC (fifth exhaustion this night): the installation core pool hit used=5000 remaining=0 (reset 03:53 UTC) and failed review-status on #15469 (run 43148031786, run 43148031744) and ci-status's file read (run 43148031104). Load at the time: about 12 open PRs from one effort, four flipped ready within a few minutes.