PR #81's first images run failed in 6s: act_runner 0.2.11 forces docker_host '-' for a tcp:// DOCKER_HOST, and gitea/act drops every bind when valid_volumes is empty. Giving jobs the privileged DinD daemon is node-root for any workflow author, so it is left to the operator; options are in the handoff entry. The driver's failure now names the cause. Co-Authored-By: Claude Opus 5.5 <[email protected]>