4 files for Claude Code, Codex and OpenCode: find-skills, mcp-builder, mcp-mongodb AGENTS.md, mcp-mongodb CLAUDE.md — 1,953 tokens loaded in every session.
AGENTS.md A 1,230 tok CLAUDE.md A 723 tok .agents/skills/find-skills/SKILL.md A 67 tok .agents/skills/mcp-builder/SKILL.md A 61 tok These files are stock42/mcp-mongodb'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.