Optimize GitHub Actions cost

[finedesignz]

Optimize GitHub Actions cost

May spend was $4.46 across 273 runs, driven by run volume on push (qc.yml = 102 runs/mo). These edits cut redundant runs without losing safety coverage.

Changes

qc.yml (the volume driver — biggest win)

• Added top-level concurrency with cancel-in-progress: true → superseded runs on rapid pushes/PR updates are auto-cancelled.
• Added paths-ignore: ['**.md','docs/**','.gitignore','LICENSE'] to both push and pull_request → docs-only changes no longer spin up the full PG-backed gate or the post-deploy smoke. Real code changes still fully covered.

docs-drift.yml

• Added concurrency cancel-in-progress. Triggers left untouched — it still watches hub/src/**, docs/openapi.json, docs/api.md (already doc/spec-scoped, never ran on every push).

mobile-shell-typecheck.yml

• Added concurrency cancel-in-progress. Already path-scoped to mobile/tauri/**; no paths-ignore added (would conflict with existing paths allowlist).

release-supervisor.yml

• Added concurrency with cancel-in-progress: **false** (don't cancel an in-flight signed release build). Tag-only trigger left intact.

Left unchanged (already cost-optimal)

• mobile-ios-build.yml — macOS 10×, but already gated by vars.ENABLE_IOS_BUILD == 'true' + workflow_dispatch/tags/pull_request scoped to mobile/tauri/**, and already has concurrency. Does not run on unrelated pushes.
• release-mobile.yml — tags (mobile-v*.*.*) + workflow_dispatch only, already has concurrency. No push-on-branch building.

Expected savings

• Eliminates superseded qc/docs/mobile runs on rapid iteration (cancel-in-progress).
• Skips full qc gate + prod smoke on doc-only pushes/PRs.
• No release pipelines altered functionally; no OS runners removed.

🤖 Generated with Claude Code