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claude-code-source-recovery — Claude Code skill: read the CLI source

Walks an agent through the recovered TypeScript source of Claude 2.1.88: commands, MCP wiring and the terminal UI.

Install into Claude Code · Skills CLI (Vercel) All methods and platforms ↓ 
npx skills add reason-machines/trending-skills --skill claude-code-source-recovery -a claude-code
Open on GitHub

What claude-code-source-recovery does

This skill points the agent at the reconstructed source tree of @anthropic-ai/claude-code 2.1.88. The tree came out of a source map, cli.js.map, that was published to npm by mistake; unpacking it yields roughly 700,000 lines of TypeScript split across src/entrypoints, src/commands, src/components, src/services, src/hooks, src/utils and src/ink.

Four areas get covered: how the CLI boots, how commands are resolved from built-ins, skills, plugins and MCP, the Ink and React pieces behind the interface, and stdio connections to MCP servers. A TypeScript snippet in the README reads a source map and writes each file back out into a directory tree.

The original 2.1.88 package is gone from npm, so the README installs it from the Tencent mirror through a direct .tgz link. You need your own copy of cli.js.map — the extraction script has nothing to read without it.

What it helps with

  • trace how the CLI resolves commands from several sources
  • inspect the Ink and React terminal components
  • see how an MCP client is wired into a real CLI
  • turn a source map back into a readable file tree
  • find session, auth and tool-execution code in the tree

Example prompts for the agent

  • Show me how command loading works in the recovered Claude source
  • Walk through the MCP client files under src/services
  • Explain how to get a source tree out of cli.js.map

How to install claude-code-source-recovery

1Skills CLI (Vercel)

npx skills add reason-machines/trending-skills --skill claude-code-source-recovery -a claude-code

2Manually: put the files in place

~/.claude/skills/claude-code-source-recovery/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/claude-code-source-recovery/

Step by step, with commands for each platform: How to install skills in Claude Code: five ways

Questions about claude-code-source-recovery

How do I install claude-code-source-recovery in Claude Code?

Run npx skills add reason-machines/trending-skills --skill claude-code-source-recovery -a claude-code. The skill lands at ~/.claude/skills/claude-code-source-recovery/SKILL.md.

What does claude-code-source-recovery do?

It helps the agent navigate the recovered TypeScript source of Claude 2.1.88: CLI startup, the command system, MCP integration and the terminal UI components.

What do I need to extract the sources myself?

A copy of the cli.js.map source map. The README includes a TypeScript example that reads it and writes the files into directories.

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