[TheGreatAxios]

Summary

• On a pull request, typecheck and each test suite run only when the change touches what they cover: unit for the hub, web or shared code, Postgres for the hub or shared code, dom for the web app. Shared code is packages, vendor, tooling, tests, the lockfile and CI itself, and runs everything. A change of only Markdown runs lint alone.
• Each job still reports, as chain's do, so the required checks pass; only its steps are skipped. Merge queue runs keep running everything.

Verification

• Docs-only demo PR demo: docs-only change (do not merge) #835 (one line in docs/DEV.md, based on this branch): lint 15s; typecheck, every test shard and every chain shard finish in 5–13s with their steps skipped.
• Hub-only demo PR demo: hub-only change (do not merge) #836 (apps/hub/package.json): dom finishes in 6s with its steps skipped; typecheck, unit, Postgres and chain run.
• actionlint passes.

Refs CL-12132

[linear-code]

CL-12132

[corbits-triage]

Triage: Pass

No changes needed from you. A maintainer will review this pull request.

Notes:

• changes sensitive paths: ci: .github/workflows/ci.yml
• Risk: medium (ci paths)

Approve held: code review has 1 finding at P2 or above open on this head.

[corbits-triage]

P2 · Unit tests read skills/ Markdown, but no filter covers skills/

packages/triage-contracts/src/setup-skill.test.ts is part of the unit suite. It reads skills/corbits-triage-setup/reference.md and checks its yaml blocks against the starter policy. skills/** is not in the shared, hub or web filters. The new code filter also ignores *.md files. So on a PR, a change under skills/ never triggers the unit suite, and a broken reference.md can pass PR CI without the test that guards it.

A PR that edits only skills/corbits-triage-setup/reference.md and breaks a yaml example: unit is skipped and the PR shows green.

Resolve this comment. Triage will not finish while it is open.