Optimize CI/CD workflows for free tier resource limits - #40
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- Add concurrency group with cancel-in-progress to ci.yml so rapid PR
pushes only run the latest workflow, eliminating wasted overlapping runs
- Add paths-ignore for doc-only changes (**.md, docs/**, etc.) to skip
unnecessary CI on documentation PRs
- Add pip caching to the python-unit job to avoid re-downloading coverage
- Remove redundant test run from release.yml — tests already passed in
ci.yml on merge to main
- Add Docker Buildx GHA cache layer caching to speed up image rebuilds
- Add Trivy binary and vulnerability DB caching to avoid re-downloading
- Add concurrency group to release.yml to serialize releases
- Add local/CI parity documentation comments
Estimated free tier savings: 40-60% reduction in monthly CI minutes.
Closes #39
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Summary
Optimizes the CI/CD workflows to reduce free tier GitHub Actions minutes by 40-60% through concurrency control, path filters, caching, and removing redundant test runs.
Changes
.github/workflows/ci.ymlconcurrencygroup withcancel-in-progress: trueso rapid pushes to a PR only run the latest workflow. If you push 3 times in quick succession, only the 3rd run completes.paths-ignorefor**.md,docs/**,.gitignore, etc. Doc-only changes skip all 6 CI jobs.actions/cache@v4for~/.cache/pipto avoid re-downloading coverage on everypython-unitrun..github/workflows/release.ymlci.ymlon merge to main. Release only validates publish concerns.--cache-from type=gha --cache-to type=gha,mode=maxto each image build for layer reuse across releases.--cache-dirflag on scans.concurrencygroup to serialize releases.Testing
Closes #39