codex-skills

Plan software tasks with `ergo` (local task dependency graph + epics) when the work spans 3+ commits or involves multiple concerns. Run "ergo --help" to learn it.

Maintain a per-repo napkin file that tracks mistakes, corrections, and what works. Activates EVERY session, unconditionally. Read the napkin before doing anything. Write to it continuously as you work — not just at session boundaries. Log your own mistakes, not just user corrections. The napkin lives in the repo at `.scratch/napkin.md`.

Generate architecture diagrams as .excalidraw files from codebase analysis. Use when the user asks to create architecture diagrams, system diagrams, visualize codebase structure, or generate excalidraw files.