Langcli

Langcli is an interactive AI coding assistant in the terminal, built upon the leaked code of Claude Code.
Therefore, the way to use Langcli is exactly the same as that of standard Claude Code. Even more exciting is that Langcli is deeply integrated with LangRouter,
allowing you to friendly use and switch between mainstream LLM models (including Claude OPUS 4.6, GLM 5.1, Kimi K2.5, Minimax M2.5, Deepseek v3.2, etc.) within an ongoing session as needed, without interrupting your context.

Why not integrate with OpenRouter? OpenRouter's API for Claude models is too expensive! Moreover, OpenRouter's Anthropic API interface is not as compatible with the official Claude Code API interface.

Quick Start

LangRouter API Key Preparation

Go to LangRouter, register an account, save your API key, and ensure your account has sufficient balance (you can deposit $2 for testing)

Installation

npm i -g langcli-com

Running

langcli

Compile from source code yourself (optional)

Environmental requirements

• Bun >= 1.3.11

Install dependencies

bun install

Running

# Development mode
bun run dev

# Build and run
bun run build && bun dist/cli.js

The built version can be started with both bun and node. You can publish to a private registry and start directly.

If you encounter any bugs, please open an issue and we will prioritize fixing them.

Capabilities

✅ = Implemented ⚠️ = Partial / Conditional ❌ = stub / Removed / Feature flag off

Core System

Tools — Always Available

Tools — Conditionally Enabled

Tools — Feature Flag Off (All Unavailable)

Tools — Stub / Unavailable

Slash Commands — Available

Slash Commands — Feature Flag Off

Slash Commands — ANT-ONLY (Unavailable)

/files /tag /backfill-sessions /break-cache /bughunter /commit /commit-push-pr /ctx_viz /good-claude /issue /init-verifiers /mock-limits /bridge-kick /version /reset-limits /onboarding /share /summary /teleport /ant-trace /perf-issue /env /oauth-refresh /debug-tool-call /agents-platform /autofix-pr

CLI Subcommands

Services

Internal Packages (packages/)

Feature Flags (31, all return false)

ABLATION_BASELINE AGENT_MEMORY_SNAPSHOT BG_SESSIONS BRIDGE_MODE BUDDY CCR_MIRROR CCR_REMOTE_SETUP CHICAGO_MCP COORDINATOR_MODE DAEMON DIRECT_CONNECT EXPERIMENTAL_SKILL_SEARCH FORK_SUBAGENT HARD_FAIL HISTORY_SNIP KAIROS KAIROS_BRIEF KAIROS_CHANNELS KAIROS_GITHUB_WEBHOOKS LODESTONE MCP_SKILLS PROACTIVE SSH_REMOTE TORCH TRANSCRIPT_CLASSIFIER UDS_INBOX ULTRAPLAN UPLOAD_USER_SETTINGS VOICE_MODE WEB_BROWSER_TOOL WORKFLOW_SCRIPTS

Project Structure

langcli/
├── src/
│   ├── entrypoints/
│   │   ├── cli.tsx          # Entry file (includes MACRO/feature polyfill)
│   │   └── sdk/             # SDK submodule stub
│   ├── main.tsx             # Main CLI logic (Commander definition)
│   └── types/
│       ├── global.d.ts      # Global variable/macro declarations
│       └── internal-modules.d.ts  # Internal npm package type declarations
├── packages/                # Monorepo workspace packages
│   ├── color-diff-napi/     # Complete implementation (terminal color diff)
│   ├── modifiers-napi/      # stub (macOS modifier key detection)
│   ├── audio-capture-napi/  # stub
│   ├── image-processor-napi/# stub
│   ├── url-handler-napi/    # stub
│   └── @ant/               # Anthropic internal package stubs
│       ├── claude-for-chrome-mcp/
│       ├── computer-use-mcp/
│       ├── computer-use-input/
│       └── computer-use-swift/
├── scripts/                 # Automation stub generation scripts
├── build.ts                 # Build script (Bun.build + code splitting + Node.js compatibility post-processing)
├── dist/                    # Build output (entry cli.js + ~450 chunk files)
└── package.json             # Bun workspaces monorepo configuration

Technical Notes

Runtime Polyfill

The entry file src/entrypoints/cli.tsx injects necessary polyfills at the top:

• feature() — All feature flags return false, skipping unimplemented branches
• globalThis.MACRO — Simulates build-time macro injection (VERSION, etc.)

Monorepo

The project uses Bun workspaces to manage internal packages. Stubs that were manually placed in node_modules/ have been migrated to packages/, resolved via workspace:*.

Feature Flags Explained

The original Claude Code uses feature() from bun:bundle to inject feature flags at build time, controlled by A/B testing platforms like GrowthBook for gradual rollout. In this project, feature() is polyfilled to always return false, so all 30 flags below are disabled.

Autonomous Agents

Remote / Distributed

Communication

Enhanced Tools

Conversation Management

Infrastructure / Experimental

License

This project is for educational and research purposes only. All rights to Claude Code belong to Anthropic.