AI coding skill plugin for pencil.dev (.pen) design files via the Pencil MCP server that works with Claude Code, Cursor, Codex, and Gemini CLI
2 files for Claude Code, Codex and OpenCode: pencil-skill AGENTS.md, pencil-skill CLAUDE.md — 4,085 tokens loaded in every session.
AGENTS.md A 3,976 tok CLAUDE.md A 109 tok These files are Nisus74/pencil-skill's own configuration — they tell Claude Code, Codex and OpenCode how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.