Agent Skills: discover-repo

Generate a comprehensive AGENTS.md index for a repository with a CLAUDE.md symlink. Dispatches parallel subagents to study directory structure, core code, docs, tests, and config, then synthesizes findings into a structured guide for future Claude sessions. Triggers on "/discover-repo", "discover this repo", "generate a CLAUDE.md", "index this codebase", or "study this repo". Use when onboarding to a new codebase or creating documentation for AI-assisted development.