v0.16.1

Added

• Added supported remote optional-skill discovery through millrace skills refresh-remote-index, which caches the public tim-osterhus/millrace-skills index into millrace-agents/skills/remote_skills_index.md.
• Extended millrace skills install <skill_ref> so listed remote skill ids can be installed into a workspace as normal local skills, including nested references/ and scripts/ files plus remote_source.json audit metadata.

Changed

• Analyst now refreshes and uses the supported remote skills index during Learning when downloadable optional skills may improve the request.
• Stage entrypoints may select up to three relevant installed optional skills instead of two.
• Updated runtime docs, CLI reference, packaged skills guidance, roadmap, changelog, and the shipped Millrace ops skill for the remote optional-skills workflow.