GitHub exposes the hidden agentic CLI layer
GitHub added agentic CLI customization fields to the Copilot usage metrics API, covering skills, custom agents, MCP servers, slash commands, and plugins. This is a useful shift rather than a platform reset: the agent work that matters is no longer just who used Copilot, but which custom work surfaces are being used. For teams shipping with GitHub, MCP, and coding agents, this creates a practical control loop: keep the useful customizations, retire dead ones, and spot where agent work is trapped inside one person’s terminal setup. Use it as a measurement layer before adding more agent tooling.