Adds a workflow_dispatch-triggered job on the self-hosted axiom runner
that captures fresh `tests/visual/__screenshots__/*.png` against a
caller-provided URL and opens a `chore(visual): refresh baselines from
<url>` PR via peter-evans/create-pull-request@v6.
This is brief 1 of 2 of the harden-visual-diff-gate convoy. The
workflow exists but is not invoked by this PR — operator dispatches via
the GitHub UI or `gh workflow run seed-visual-baselines.yml` once they
want a fresh baseline against post-glass-redesign main.
Brief 2 (flip continue-on-error: true off visual-diff.yml, add 9th
forbidden-patterns check) is unblocked once a fresh baseline lands via
this workflow's auto-PR.
Convoy decision D1 ratified: Option B (workflow_dispatch + auto-PR)
chosen over Option A (ad-hoc SSH-into-CT-111 + manual commit). The
workflow gives the baseline regeneration a reviewable Git-native shape;
the auto-PR carries a checklist for visual sanity-check before merge.
Workflow shape:
- Inputs: base_url (required, no default to avoid wrong-target
accidents), reason (optional, used in PR body).
- Permissions: contents: write + pull-requests: write — sufficient for
default GITHUB_TOKEN; no PAT needed.
- Caches: shares the node_modules + Playwright browser caches with
visual-diff.yml so the byte-equivalence guarantee holds without
cache miss overhead.
- Idempotent: peter-evans/create-pull-request short-circuits to a
::notice:: annotation if the captures match the existing committed
baselines (no PR opened).
Metrics: logged role-conductor + role-architect + role-implementer
events for this convoy in .convoys/.metrics.jsonl. Satisfies the
convoy-metrics-gate (PR #134, 9eef8d9) that fires on convoy:-titled
PRs requiring at least one new metrics row.
Co-authored-by: Cursor <cursoragent@cursor.com>
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