Claude Code Internals — Development skill for Claude Code

Claude Code Internals

A self-contained Claude Code skill that gives Claude source-level knowledge of its own architecture — 50 lessons covering every internal subsystem, searchable three ways.

**Skill Version:** 2.0.0 | **Captured from:** Claude Code v2.1.88 | **Date:** 2026-03-31 | **License:** MIT

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Table of Contents

• What This Is
• Why This Skill Is Useful
• How It Works
• Prerequisites
• Installation
• Usage Examples
• Sample Output
• Getting the Most Out of It
• RuFlo & RuVector Integration
• Troubleshooting
• What's Inside
• Version Tracking
• Platform Compatibility
• License

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What This Is

This is a Claude Code skill (a local knowledge package that Claude Code loads automatically) containing a complete reverse-engineering of Claude Code's internal architecture. 50 detailed lessons cover every major subsystem — from the boot sequence to unreleased features. When you type `/claude-code-internals hooks` or `/claude-code-internals permissions`, Claude doesn't guess or hallucinate. It reads actual architecture documentation, searches through indexed reference material, and gives you source-level answers with code examples and type definitions.

Without this skill, Claude knows *how to use* Claude Code but doesn't know *how Claude Code works internally*. With it, Claude becomes an expert on its own implementation — the query engine's retry logic, the 27 hook event types, the 7-phase permission pipeline, the compaction algorithm, the agent spawn lifecycle, all of it.

Why This Skill Is Useful

The Core Problem

Claude Code is a powerful tool, but Claude doesn't understand its own int