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The maintainer-only manual CI dispatch (workflow_dispatch) cannot be triggered by fork contributors. The 🧩 Subset label closes that gap: when present on a PR, the detect-affected-roles job resolves the deploy whitelist from an explicit roles: YAML block in the PR body instead of the diff, giving fork PRs the same narrowed matrix a maintainer would dispatch manually. Without the label, behavior is unchanged (the dispatcher falls through to the diff resolver, output byte-identical). - subset_roles.py: parse and strictly validate the PR-body roles block (invalid YAML / empty / unknown id / path-traversal all hard-fail) - pr_affected_roles.sh: single dispatcher selecting subset vs diff resolver - entry-pull-request-change.yml: wire the label and PR body into the job - PR templates, pipeline/workflows docs and READMEs, integration tests Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
GitHub Workflow Helpers 🔧
This directory holds the shell helpers that GitHub Actions workflows under .github/workflows/ call. Helpers are grouped by responsibility into subfolders so each workflow file pulls only from the clusters it actually needs.
Subfolders 🗂️
| Subfolder | Responsibility |
|---|---|
| runner/ | Host-runner hygiene around image builds and deploys (disk, swap, Docker daemon, diagnostics). |
| cancel/ | Cancellation of in-progress workflow runs on PR-close and branch-delete events. |
| cleanup/ | Scheduled repository maintenance that prunes stale GitHub resources. |
| resolve/ | Derivation of structured workflow inputs and outputs from repository state. |
| sync/ | Ref synchronization before workflow jobs derive CI scope from git history. |
| update/ | The scheduled Update: Versions pipeline (version bumps and PR open/refresh). |
| release/ | Release-time gates that decide whether a tagged commit may be released. |
A new helper MUST live in the subfolder that matches its responsibility. New responsibilities MAY motivate a new subfolder, but MUST NOT flatten back into the top level.
For the workflow catalog see workflows.md. For the repository Make target index see make.md.