Answering a CI-posture question from vastblue-dev meant measuring three
things rather than recalling them. Two came back the opposite of the way
the config reads:
- `container.valid_volumes: []` does NOT keep the docker daemon out of
jobs. act_runner mounts /var/run/docker.sock on its own, so every job
on the shared runner is uid 0 with `docker ps` over all 49 containers
on ana-docker — gitea, synapse, phasefinal-web, adguardhome included.
It is also load-bearing: four repos drive buildx through it, so the
fix is isolation onto a dedicated runner, not tightening this one.
- A full-URL `uses: https://gitea.phasefinal.com/actions/checkout@v4`
resolves from the local mirrors today. That is github-independence per
workflow without the DEFAULT_ACTIONS_URL flip that has been parked on
act_runner's action-fetch auth since 2026-08-05.
Also recorded: `services:` containers work (Postgres 16 on the service
name), job images need a node binary for JS actions, and `/actions/runs`
lists runs that `/actions/tasks` reports as empty on gitea 1.26.1.
Measured on a throwaway repo under the claude-bot account, since deleted.
config.yaml change is comment-only and deliberately not deployed — it
would bounce the runner for no runtime effect.
vh
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