act_runner v0.2.11 bundles an `act` that supports up to node20, but
DeterminateSystems/nix-installer-action@main moved to the node24 runtime,
so the job died with "runs.using ... got node24". Replace the JS action
with a plain single-user Nix install (--no-daemon, no systemd needed in
the catthehacker container) and set NIX_CONFIG at the job level so the
bare `nix flake check` still gets flakes. A run step has no node-runtime
coupling, so this won't break again when an action bumps its runtime.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Gitea only scans .gitea/workflows and .github/workflows; it does not scan
.forgejo/workflows (that path is Forgejo-only). The CI was therefore
dormant on a Gitea instance regardless of whether Actions was enabled.
git mv to .gitea/workflows/ (scanned by both Gitea and Forgejo). Updated
the live references in STRUCTURE.md (Gitea + act_runner), AGENT.md, and
today's ROADMAP entry; left the dated historical Shipped entries as the
changelog they are.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
