Crush

Your new coding bestie, now available in your favourite terminal.
Your tools, your code, and your workflows, wired into your LLM of choice.

Crush Demo

Features

Multi-Model: choose from a wide range of LLMs or add your own via OpenAI- or Anthropic-compatible APIs
Flexible: switch LLMs mid-session while preserving context
Session-Based: maintain multiple work sessions and contexts per project
LSP-Enhanced: Crush uses LSPs for additional context, just like you do
Extensible: add capabilities via MCPs (http, stdio, and sse)
Works Everywhere: first-class support in every terminal on macOS, Linux, Windows (PowerShell and WSL), and FreeBSD

Installation

Use a package manager:

# macOS or Linux
brew install charmbracelet/tap/crush

# NPM
npm install -g @charmland/crush

# Arch Linux (btw)
yay -S crush-bin

# Windows (with Winget)
winget install charmbracelet.crush

# Nix
nix-shell -p nur.repos.charmbracelet.crush

Debian/Ubuntu

sudo mkdir -p /etc/apt/keyrings
curl -fsSL https://repo.charm.sh/apt/gpg.key | sudo gpg --dearmor -o /etc/apt/keyrings/charm.gpg
echo "deb [signed-by=/etc/apt/keyrings/charm.gpg] https://repo.charm.sh/apt/ * *" | sudo tee /etc/apt/sources.list.d/charm.list
sudo apt update && sudo apt install crush

Fedora/RHEL

echo '[charm]
name=Charm
baseurl=https://repo.charm.sh/yum/
enabled=1
gpgcheck=1
gpgkey=https://repo.charm.sh/yum/gpg.key' | sudo tee /etc/yum.repos.d/charm.repo
sudo yum install crush

Or, download it:

Packages are available in Debian and RPM formats
Binaries are available for Linux, macOS, Windows, FreeBSD, OpenBSD, and NetBSD

Or just install it with go:

go install github.com/charmbracelet/crush@latest

Productivity may increase when using Crush and you may find yourself nerd sniped when first using the application. If the symptoms persist, join the Discord and nerd snipe the rest of us.

Getting Started

The quickest way to get started is to grab an API key for your preferred provider such as Anthropic, OpenAI, Groq, or OpenRouter and just start Crush. You'll be prompted to enter your API key.

That said, you can also set environment variables for preferred providers.

Supported Environment Variables

Environment Variable	Provider
`ANTHROPIC_API_KEY`	Anthropic
`OPENAI_API_KEY`	OpenAI
`GEMINI_API_KEY`	Google Gemini
`VERTEXAI_PROJECT`	Google Cloud VertexAI (Gemini)
`VERTEXAI_LOCATION`	Google Cloud VertexAI (Gemini)
`GROQ_API_KEY`	Groq
`AWS_ACCESS_KEY_ID`	AWS Bedrock (Claude)
`AWS_SECRET_ACCESS_KEY`	AWS Bedrock (Claude)
`AWS_REGION`	AWS Bedrock (Claude)
`AZURE_OPENAI_ENDPOINT`	Azure OpenAI models
`AZURE_OPENAI_API_KEY`	Azure OpenAI models (optional when using Entra ID)
`AZURE_OPENAI_API_VERSION`	Azure OpenAI models

Configuration

Crush runs great with no configuration. That said, if you do need or want to customize Crush, configuration can be added either local to the project itself, or globally, with the following priority:

./.crush.json
./crush.json
$HOME/.config/crush/crush.json

Configuration itself is stored as a JSON object:

{
   "this-setting": { }
   "that-setting": { }
}

LSPs

Crush can use LSPs for additional context to help inform its decisions, just like you would. LSPs can be added manually like so:

{
  "$schema": "https://charm.land/crush.json",
  "lsp": {
    "go": {
      "command": "gopls"
    },
    "typescript": {
      "command": "typescript-language-server",
      "args": ["--stdio"]
    },
    "nix": {
      "command": "nil"
    }
  }
}

MCPs

Crush also supports Model Context Protocol (MCP) servers through three transport types: stdio for command-line servers, http for HTTP endpoints, and sse for Server-Sent Events. Environment variable expansion is supported using $(echo $VAR) syntax.

{
  "$schema": "https://charm.land/crush.json",
  "mcp": {
    "filesystem": {
      "type": "stdio",
      "command": "node",
      "args": ["/path/to/mcp-server.js"],
      "env": {
        "NODE_ENV": "production"
      }
    },
    "github": {
      "type": "http",
      "url": "https://example.com/mcp/",
      "headers": {
        "Authorization": "$(echo Bearer $EXAMPLE_MCP_TOKEN)"
      }
    },
    "streaming-service": {
      "type": "sse",
      "url": "https://example.com/mcp/sse",
      "headers": {
        "API-Key": "$(echo $API_KEY)"
      }
    }
  }
}

Whitelisting Tools

By default, Crush will ask you for permission before running tool calls. If you'd like, you can whitelist tools to be executed without prompting you for permissions. Use this with care.

{
  "$schema": "https://charm.land/crush.json",
  "permissions": {
    "allowed_tools": [
      "view",
      "ls",
      "grep",
      "edit",
      "mcp_context7_get-library-doc"
    ]
  }
}

You can also skip all permission prompts entirely by running Crush with the --yolo flag. Be very, very careful with this feature.

Custom Providers

Crush supports custom provider configurations for both OpenAI-compatible and Anthropic-compatible APIs.

OpenAI-Compatible APIs

Here’s an example configuration for Deepseek, which uses an OpenAI-compatible API. Don't forget to set DEEPSEEK_API_KEY in your environment.

{
  "$schema": "https://charm.land/crush.json",
  "providers": {
    "deepseek": {
      "type": "openai",
      "base_url": "https://api.deepseek.com/v1",
      "api_key": "$DEEPSEEK_API_KEY",
      "models": [
        {
          "id": "deepseek-chat",
          "name": "Deepseek V3",
          "cost_per_1m_in": 0.27,
          "cost_per_1m_out": 1.1,
          "cost_per_1m_in_cached": 0.07,
          "cost_per_1m_out_cached": 1.1,
          "context_window": 64000,
          "default_max_tokens": 5000
        }
      ]
    }
  }
}

Anthropic-Compatible APIs

Custom Anthropic-compatible providers follow this format:

{
  "$schema": "https://charm.land/crush.json",
  "providers": {
    "custom-anthropic": {
      "type": "anthropic",
      "base_url": "https://api.anthropic.com/v1",
      "api_key": "$ANTHROPIC_API_KEY",
      "extra_headers": {
        "anthropic-version": "2023-06-01"
      },
      "models": [
        {
          "id": "claude-sonnet-4-20250514",
          "name": "Claude Sonnet 4",
          "cost_per_1m_in": 3,
          "cost_per_1m_out": 15,
          "cost_per_1m_in_cached": 3.75,
          "cost_per_1m_out_cached": 0.3,
          "context_window": 200000,
          "default_max_tokens": 50000,
          "can_reason": true,
          "supports_attachments": true
        }
      ]
    }
  }
}

Logging

Sometimes you need to look at logs. Luckily, Crush logs all sorts of stuff. Logs are stored in ./.crush/logs/crush.log relative to the project.

The CLI also contains some helper commands to make perusing recent logs easier:

# Print the last 1000 lines
crush logs

# Print the last 500 lines
crush logs --tail 500

# Follow logs in real time
crush logs --follow

Want more logging? Run crush with the --debug flag, or enable it in the config:

{
  "$schema": "https://charm.land/crush.json",
  "options": {
    "debug": true,
    "debug_lsp": true
  }
}

Whatcha think?

We’d love to hear your thoughts on this project. Need help? We gotchu. You can find us on:

License

FSL-1.1-MIT

Part of Charm.

Charm热爱开源 • Charm loves open source