Publish Claude Code source snapshot from a single baseline commit
Squash the imported source snapshot and follow-up documentation history into one root commit so the archive starts from a single coherent state. Constraint: Repository intentionally tracks an analyzed Claude Code source snapshot Constraint: Author and committer must be instructkr <no-contact@instruct.kr> Rejected: Preserve the four-step import/docs history | user explicitly requested one squashed commit Confidence: high Scope-risk: broad Reversibility: clean Directive: Keep future analysis and refactor commits separate from this archive baseline Tested: git status clean; local history rewritten to one commit; force-pushed main to origin and instructkr Not-tested: Fresh clone verification after push
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instructkr
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README.md
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# Claude Code — Leaked Source (2026-03-31)
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> **On March 31, 2026, the full source code of Anthropic's Claude Code CLI was leaked** via a `.map` file exposed in their npm registry.
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---
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## How It Leaked
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[Chaofan Shou (@Fried_rice)](https://x.com/Fried_rice) discovered the leak and posted it publicly:
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> **"Claude code source code has been leaked via a map file in their npm registry!"**
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>
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> — [@Fried_rice, March 31, 2026](https://x.com/Fried_rice/status/2038894956459290963)
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The source map file in the published npm package contained a reference to the full, unobfuscated TypeScript source, which was downloadable as a zip archive from Anthropic's R2 storage bucket.
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---
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## Overview
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Claude Code is Anthropic's official CLI tool that lets you interact with Claude directly from the terminal to perform software engineering tasks — editing files, running commands, searching codebases, managing git workflows, and more.
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This repository contains the leaked `src/` directory.
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- **Leaked on**: 2026-03-31
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- **Language**: TypeScript
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- **Runtime**: Bun
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- **Terminal UI**: React + [Ink](https://github.com/vadimdemedes/ink) (React for CLI)
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- **Scale**: ~1,900 files, 512,000+ lines of code
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---
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## Directory Structure
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```
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src/
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├── main.tsx # Entrypoint (Commander.js-based CLI parser)
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├── commands.ts # Command registry
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├── tools.ts # Tool registry
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├── Tool.ts # Tool type definitions
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├── QueryEngine.ts # LLM query engine (core Anthropic API caller)
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├── context.ts # System/user context collection
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├── cost-tracker.ts # Token cost tracking
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│
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├── commands/ # Slash command implementations (~50)
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├── tools/ # Agent tool implementations (~40)
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├── components/ # Ink UI components (~140)
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├── hooks/ # React hooks
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├── services/ # External service integrations
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├── screens/ # Full-screen UIs (Doctor, REPL, Resume)
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├── types/ # TypeScript type definitions
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├── utils/ # Utility functions
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│
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├── bridge/ # IDE integration bridge (VS Code, JetBrains)
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├── coordinator/ # Multi-agent coordinator
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├── plugins/ # Plugin system
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├── skills/ # Skill system
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├── keybindings/ # Keybinding configuration
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├── vim/ # Vim mode
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├── voice/ # Voice input
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├── remote/ # Remote sessions
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├── server/ # Server mode
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├── memdir/ # Memory directory (persistent memory)
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├── tasks/ # Task management
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├── state/ # State management
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├── migrations/ # Config migrations
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├── schemas/ # Config schemas (Zod)
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├── entrypoints/ # Initialization logic
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├── ink/ # Ink renderer wrapper
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├── buddy/ # Companion sprite (Easter egg)
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├── native-ts/ # Native TypeScript utils
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├── outputStyles/ # Output styling
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├── query/ # Query pipeline
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└── upstreamproxy/ # Proxy configuration
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```
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---
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## Core Architecture
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### 1. Tool System (`src/tools/`)
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Every tool Claude Code can invoke is implemented as a self-contained module. Each tool defines its input schema, permission model, and execution logic.
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| Tool | Description |
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|---|---|
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| `BashTool` | Shell command execution |
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| `FileReadTool` | File reading (images, PDFs, notebooks) |
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| `FileWriteTool` | File creation / overwrite |
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| `FileEditTool` | Partial file modification (string replacement) |
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| `GlobTool` | File pattern matching search |
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| `GrepTool` | ripgrep-based content search |
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| `WebFetchTool` | Fetch URL content |
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| `WebSearchTool` | Web search |
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| `AgentTool` | Sub-agent spawning |
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| `SkillTool` | Skill execution |
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| `MCPTool` | MCP server tool invocation |
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| `LSPTool` | Language Server Protocol integration |
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| `NotebookEditTool` | Jupyter notebook editing |
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| `TaskCreateTool` / `TaskUpdateTool` | Task creation and management |
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| `SendMessageTool` | Inter-agent messaging |
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| `TeamCreateTool` / `TeamDeleteTool` | Team agent management |
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| `EnterPlanModeTool` / `ExitPlanModeTool` | Plan mode toggle |
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| `EnterWorktreeTool` / `ExitWorktreeTool` | Git worktree isolation |
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| `ToolSearchTool` | Deferred tool discovery |
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| `CronCreateTool` | Scheduled trigger creation |
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| `RemoteTriggerTool` | Remote trigger |
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| `SleepTool` | Proactive mode wait |
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| `SyntheticOutputTool` | Structured output generation |
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### 2. Command System (`src/commands/`)
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User-facing slash commands invoked with `/` prefix.
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| Command | Description |
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|---|---|
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| `/commit` | Create a git commit |
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| `/review` | Code review |
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| `/compact` | Context compression |
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| `/mcp` | MCP server management |
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| `/config` | Settings management |
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| `/doctor` | Environment diagnostics |
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| `/login` / `/logout` | Authentication |
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| `/memory` | Persistent memory management |
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| `/skills` | Skill management |
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| `/tasks` | Task management |
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| `/vim` | Vim mode toggle |
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| `/diff` | View changes |
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| `/cost` | Check usage cost |
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| `/theme` | Change theme |
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| `/context` | Context visualization |
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| `/pr_comments` | View PR comments |
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| `/resume` | Restore previous session |
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| `/share` | Share session |
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| `/desktop` | Desktop app handoff |
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| `/mobile` | Mobile app handoff |
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### 3. Service Layer (`src/services/`)
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| Service | Description |
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|---|---|
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| `api/` | Anthropic API client, file API, bootstrap |
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| `mcp/` | Model Context Protocol server connection and management |
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| `oauth/` | OAuth 2.0 authentication flow |
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| `lsp/` | Language Server Protocol manager |
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| `analytics/` | GrowthBook-based feature flags and analytics |
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| `plugins/` | Plugin loader |
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| `compact/` | Conversation context compression |
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| `policyLimits/` | Organization policy limits |
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| `remoteManagedSettings/` | Remote managed settings |
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| `extractMemories/` | Automatic memory extraction |
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| `tokenEstimation.ts` | Token count estimation |
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| `teamMemorySync/` | Team memory synchronization |
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### 4. Bridge System (`src/bridge/`)
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A bidirectional communication layer connecting IDE extensions (VS Code, JetBrains) with the Claude Code CLI.
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- `bridgeMain.ts` — Bridge main loop
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- `bridgeMessaging.ts` — Message protocol
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- `bridgePermissionCallbacks.ts` — Permission callbacks
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- `replBridge.ts` — REPL session bridge
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- `jwtUtils.ts` — JWT-based authentication
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- `sessionRunner.ts` — Session execution management
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### 5. Permission System (`src/hooks/toolPermission/`)
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Checks permissions on every tool invocation. Either prompts the user for approval/denial or automatically resolves based on the configured permission mode (`default`, `plan`, `bypassPermissions`, `auto`, etc.).
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### 6. Feature Flags
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Dead code elimination via Bun's `bun:bundle` feature flags:
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```typescript
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import { feature } from 'bun:bundle'
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// Inactive code is completely stripped at build time
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const voiceCommand = feature('VOICE_MODE')
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? require('./commands/voice/index.js').default
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: null
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```
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Notable flags: `PROACTIVE`, `KAIROS`, `BRIDGE_MODE`, `DAEMON`, `VOICE_MODE`, `AGENT_TRIGGERS`, `MONITOR_TOOL`
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---
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## Key Files in Detail
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### `QueryEngine.ts` (~46K lines)
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The core engine for LLM API calls. Handles streaming responses, tool-call loops, thinking mode, retry logic, and token counting.
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### `Tool.ts` (~29K lines)
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Defines base types and interfaces for all tools — input schemas, permission models, and progress state types.
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### `commands.ts` (~25K lines)
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Manages registration and execution of all slash commands. Uses conditional imports to load different command sets per environment.
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### `main.tsx`
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Commander.js-based CLI parser + React/Ink renderer initialization. At startup, parallelizes MDM settings, keychain prefetch, and GrowthBook initialization for faster boot.
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---
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## Tech Stack
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| Category | Technology |
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| Runtime | [Bun](https://bun.sh) |
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| Language | TypeScript (strict) |
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| Terminal UI | [React](https://react.dev) + [Ink](https://github.com/vadimdemedes/ink) |
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| CLI Parsing | [Commander.js](https://github.com/tj/commander.js) (extra-typings) |
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| Schema Validation | [Zod v4](https://zod.dev) |
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| Code Search | [ripgrep](https://github.com/BurntSushi/ripgrep) (via GrepTool) |
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| Protocols | [MCP SDK](https://modelcontextprotocol.io), LSP |
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| API | [Anthropic SDK](https://docs.anthropic.com) |
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| Telemetry | OpenTelemetry + gRPC |
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| Feature Flags | GrowthBook |
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| Auth | OAuth 2.0, JWT, macOS Keychain |
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---
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## Notable Design Patterns
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### Parallel Prefetch
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Startup time is optimized by prefetching MDM settings, keychain reads, and API preconnect in parallel — before heavy module evaluation begins.
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```typescript
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// main.tsx — fired as side-effects before other imports
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startMdmRawRead()
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startKeychainPrefetch()
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```
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### Lazy Loading
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Heavy modules (OpenTelemetry ~400KB, gRPC ~700KB) are deferred via dynamic `import()` until actually needed.
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### Agent Swarms
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Sub-agents are spawned via `AgentTool`, with `coordinator/` handling multi-agent orchestration. `TeamCreateTool` enables team-level parallel work.
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### Skill System
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Reusable workflows defined in `skills/` and executed through `SkillTool`. Users can add custom skills.
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### Plugin Architecture
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Built-in and third-party plugins are loaded through the `plugins/` subsystem.
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---
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## Disclaimer
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This repository archives source code that was leaked from Anthropic's npm registry on **2026-03-31**. All original source code is the property of [Anthropic](https://www.anthropic.com).
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