What problem does it solve? Understanding an unfamiliar codebase requires reading every file manually, and keeping that documentation current as code changes is even harder. This Skill automates repository mapping by tracking file hashes and generating per-folder codemap documentation. ## Core Features & Use Cases - Hierarchical Codemap Generation: Creates empty codemap.md templates in every relevant folder, then delegates to fixer agents to document responsibility, design patterns, data flow, and integration points. - Change Detection: Tracks file and folder hashes in .slim/codemap.json so subsequent runs only update codemaps for folders whose files were added, removed, or modified. - Legacy Migration & AGENTS.md Registration: Automatically migrates .slim/cartography.json state and registers the codemap in AGENTS.md so agents discover it on every session. - Use Case: When joining a new project, run the codemap workflow once to produce a root Repository Atlas plus per-directory maps that any agent or developer can read before making changes. ## Quick Start Ask the agent to generate a codemap for this repository so it initializes state, scaffolds per-folder codemap.md files, and builds a root repository atlas.