Working on version tracking for AI agent skills. When skill files move between Claude, Codex, Copilot, and local storage, they lose their version identity. Skill-Provenance embeds version headers, a changelog, and a manifest inside the skill bundle so any session can verify what it received. https://github.com/snapsynapse/skill-provenance It came out of building a larger AI adoption measurement framework where I kept losing track of which version of which skill was running where. Turned out to be a gap nobody had addressed, even with six competing agent skill package managers launching in the same month.