Codebase Mapping
Codebase Mapping is an agent skill (a SKILL.md file) from a5c-ai/babysitter. Automatic codebase indexing for invisible context injection. It works with Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot and OpenCode and has 1,870 GitHub stars across a repository of 2 listed skills.
Data as of from the GitHub API; description from the skill's SKILL.md. Report an error
Add this skill
Claude
This repository is a Claude Code plugin marketplace. In Claude Code:
/plugin marketplace add a5c-ai/babysitter
/plugin install babysitter@babysitterIn the Claude apps, zip the codebase-mapping folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).
ChatGPT / Codex
Codex reads skills from .agents/skills/ in a repo or ~/.agents/skills/ for every project:
git clone --depth 1 https://github.com/a5c-ai/babysitter.git
cp -r babysitter/library/methodologies/claudekit/skills/codebase-mapping .agents/skills/codebase-mapping # repo; ~/.agents/skills for all projectsStandalone skills also load in the ChatGPT desktop app.
Cursor
Cursor loads skills from .cursor/skills/ (or ~/.cursor/skills/) and also reads .claude/skills/:
git clone --depth 1 https://github.com/a5c-ai/babysitter.git
cp -r babysitter/library/methodologies/claudekit/skills/codebase-mapping .cursor/skills/codebase-mapping # project; ~/.cursor/skills for all projectsSource (checked Oct 7, 2026): code.claude.com/docs/en/skills (opens in a new tab), code.claude.com/docs/en/plugin-marketplaces (opens in a new tab), support.claude.com/en/articles/12512180-using-skills-in-claude (opens in a new tab), learn.chatgpt.com/docs/build-skills (opens in a new tab), cursor.com/docs/context/skills (opens in a new tab)
What this skill does
Automatic codebase indexing for invisible context injection. Catalogs project structure, file types, entry points, dependencies, and test layout. The codebase map is injected as invisible context during UserPromptSubmit, providing: - Project type and framework awareness - Convention awareness for code generation - Dependency awareness for import suggestions - Test pattern awareness for test generation
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How do I install the Codebase Mapping skill?
In Claude Code, run /plugin marketplace add a5c-ai/babysitter and then /plugin install babysitter@babysitter. For Codex or Cursor, copy the codebase-mapping folder into .agents/skills/ or .cursor/skills/.
Is the Codebase Mapping skill free?
Yes. The repository is open source under the MIT license.
Is Codebase Mapping maintained?
The repository's most recent commit was on Aug 31, 2026. Its latest release is v0.0.188. appsgit only lists skills from repositories with a commit in the last six months.