ci: narrow pushes on main and next to the areas they changed - #675
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…osed planCi now treats a branch push the same way it treats a pull request: it narrows to the areas selectAreas derives from the event's changed files, provided that list resolved to at least one file. An empty list - an unresolved before..after diff (new branch, force-push with no shared history) or a diff that genuinely touched nothing - keeps the existing full-validation fallback, so the push stays fail closed rather than skipping lanes it cannot account for. ci.yml gains a push counterpart to the pull request's changed-file step: it resolves before via a shallow fetch and diffs it against the pushed commit, leaving the file list empty (and the plan job falling back to full validation) whenever that fetch or diff fails. Tag pushes and workflow_dispatch are untouched - they never reach the selective branch. Claude-Session: https://claude.ai/code/session_01NSrXpH1WyqP7udpWWhHz1i
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enabled auto-merge (squash)
September 4, 2026 22:41
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A push validated every area; only a pull request narrowed to what it changed. Pushes now get the same treatment:
ci.ymldiffsbefore..sha(shallow fetch ofbefore) and hands the file list toplanCi, which keeps the single source of truth inscripts/ci/lanes.ts.Fail closed: a new branch (
beforeall zeros), a failed fetch or diff (force-push without a common base), or an empty diff all fall back to the full matrix. Tags andworkflow_dispatchnever take the push path and stay full. Coverage and the release lane are unchanged. Twenty planner tests cover narrowing, the pull-request-only lane, the empty-diff fallback and dispatch.