mc — Morph Code

A compiled fork of Claude Code with WarpGrep semantic code search, multi-provider LLM support, and subagent orchestration. Ships as a single native binary per platform.

Install

curl -fsSL subagents.com/install | bash

Or with npm:

npm install -g @morphllm/morphcode

Usage

# Interactive mode
mc

# Single prompt
mc -p "refactor the auth module"

# Print mode (non-interactive, for scripts)
mc -p "explain this codebase" --print

# Specify model
mc --model claude-sonnet-4-6
mc --model opus

# List available agents
mc agents

What's different from Claude Code

WarpGrep agent — Semantic code search powered by Morph. The warpgrep subagent understands code structure, not just text patterns. Always registered alongside Explore and Plan.

Compiled binary — Ships as a native Mach-O / ELF binary (like Claude Code itself). Starts instantly, no runtime dependencies.

Multi-provider LLM — Set PI_ENGINE=on to route through OpenAI, Google, Mistral, or any provider supported by pi-ai.

Explore & Plan agents — Always enabled. The Explore agent prefers WarpGrep over regex grep when available.

Agents

$ mc agents

6 active agents

Built-in agents:
  Explore          · haiku    — Fast codebase exploration
  Plan             · inherit  — Architecture and implementation planning
  warpgrep         · haiku    — Semantic code search via Morph
  general-purpose  · inherit  — Research, code search, multi-step tasks
  claude-code-guide · haiku   — Questions about features and usage
  statusline-setup · sonnet   — Configure status line

Environment variables

| Variable | Required | Purpose | |----------|----------|---------| | ANTHROPIC_API_KEY | Yes (or OAuth via mc auth login) | Anthropic API access | | MORPH_API_KEY | No | Enables WarpGrep and FastApply tools | | OPENAI_API_KEY | No | For PI_ENGINE multi-provider mode | | GOOGLE_API_KEY | No | For PI_ENGINE multi-provider mode | | PI_ENGINE | No | Set to on to route LLM calls through pi-ai |

Platform binaries

Published to npm as platform-specific packages:

| Platform | Package | |----------|---------| | macOS Apple Silicon | @morphllm/morphcode-darwin-arm64 | | macOS Intel | @morphllm/morphcode-darwin-x64 | | Linux x64 | @morphllm/morphcode-linux-x64 | | Linux arm64 | @morphllm/morphcode-linux-arm64 | | Windows x64 | @morphllm/morphcode-windows-x64 |

Development

# Run from source (requires Bun)
cd packages/subagent-cli
bun run --preload ./stubs/globals.ts ./src/entrypoints/cli.tsx

# Build native binary
bun build --compile _entry.ts --outfile dist/mc --target bun

# Run tests
npx vitest --run

# List agents
bun run --preload ./stubs/globals.ts ./src/entrypoints/cli.tsx agents

Architecture

Built on Claude Code v2.1.88 source, compiled to a native binary via bun build --compile.

Key modifications:

• src/tools/AgentTool/built-in/warpGrepAgent.ts — WarpGrep subagent
• src/tools/WarpGrepTool/WarpGrepTool.ts — WarpGrep as a Claude Code Tool
• src/tools/AgentTool/builtInAgents.ts — Explore/Plan always enabled, warpgrep registered
• src/engine/ — Pi-mono integration layer for multi-provider LLM
• src/query/deps.ts — LLM call routing (Anthropic default, pi-ai when PI_ENGINE=on)
• stubs/ — Build-time stubs for unavailable Anthropic-internal packages
• .github/workflows/publish-morphcode.yml — Multi-platform binary build and npm publish