The build steps now declare 'runs-on: self-hosted' (default label advertised by an act_runner registered with Docker mode). Previously they used 'ubuntu-22.04' which would not match any default runner and would leave every job in 'no runner available'. ci.yml matrix extended to ['3.10','3.11','3.12','3.13'] for forward coverage on Python 3.13 (current stable as of 2026). docs/development.md 'CI/CD - Gitea Actions' section also corrected: - the egress workaround now uses the actual Gitea 1.26 key [actions].DEFAULT_ACTIONS_URL (not ENABLE_GITHUB_ACTIONS_MIRROR) - the act_runner docker command uses --rm -it for the first run to surface registration errors in the terminal before daemonization - runner-scoping note clarifies global vs repo-scoped token URLs Verified by ruff_exit=0 and pytest 66/66 still green locally.