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Both architectures were claimed to work and only one was ever exercised. The deploy matrix now carries an architecture the way it carries mode, tor, distro and filesystem, so every run proves both. A job cannot ask for an architecture the way it asks for a distro, because the architecture is the machine rather than something the job installs on it. The matrix therefore carries a runner label and `runs-on` reads it, and an architecture without a label in RUNNERS is a build error rather than a row that lands on the wrong hardware and still reports green. assert_architecture.sh checks the runner it actually got, because a label that stops resolving to arm64 would otherwise go unnoticed forever. Assignment is rotation, not chance: two architectures against five distros and fifteen distro/filesystem positions are coprime enough that every combination comes round. A role narrows the pool through `architectures` in its meta/services.yml; without one it takes whatever the rotation hands it. An empty intersection aborts instead of silently removing the role from the run. Images are built per architecture and pushed under an architecture-suffixed tag, then merged into the plain tag by manifest_all.sh; pushing the plain tag from both builds would let the last one win and send half the rows to the wrong platform. cleanup.sh now protects the `ci-<sha>-<architecture>` children of a protected tag, because the plain tag is an index over them and deleting a child leaves it unpullable on that platform. label.py is split out of axes.py, which the 500-line limit no longer fits. Writing a job title and reading one back belong together: a retrigger that recovers an axis wrongly replays a different deploy than the one that failed, and a drifting artifact name makes the failure reporter download nothing. The leading `.*` in LABEL_RE is greedy on purpose so it anchors on the last mode glyph; a reusable-workflow caller path carries a glyph of its own, and test_selection.py guards the case. Verified: 313 unit tests and 48 subtests across utils/github/variant, utils/roles and cli/meta/ci. Locally, a deploy pinned to arm64 reaches ok=1444 and its image builds log aarch64-linux-gnu paths. Not verified here: actionlint over the seven changed workflows, and a full `make test`. The matrix doubles the row count, so runtime and runner availability change for every CI run from here. Co-Authored-By: Claude Opus 5 (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.