OpenHorse

OpenHorse — Universal Agent Harness Framework A CLI-driven coding agent with safety boundaries, tool orchestration, memory, and context management.

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🌍 Language: English | 简体中文

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Overview

OpenHorse is a terminal-based coding agent that wraps LLM APIs in a harness of safety checks, tool orchestration, session management, and context awareness.

Dimension	Description
AI as Horse	Powerful models need guidance and constraints
OpenHorse as Reins	Precise control to prevent runaway behavior
Harness System	Safety boundaries, task constraints, result validation
Tool Calling	LLM autonomously invokes tools to complete tasks
Memory System	Layered memory with semantic search
MCP Protocol	Connect external MCP servers for tool extension

Quick Start

Requirements

• Node.js >= 18.0
• npm >= 9.0

Install & Run

# Install globally
npm install -g openhorse

# Or from source
git clone https://github.com/Linux2010/openhorse.git
cd openhorse && npm install && npm run build

# Configure API key
export OPENHORSE_API_KEY=your-api-key
# or create ~/.openhorse/openhorse.json on first run

# Start
openhorse

Key Features

Feature	Description
Tool Orchestration	20+ built-in tools: file I/O, shell, web, memory, git, LSP
Multi-Model	OpenAI, Claude, GLM, Qwen, DeepSeek, custom endpoints
Context Awareness	Per-model context windows, token-based auto-compact at 95%
MCP Protocol	stdio MCP servers with heartbeat + reconnect
Memory System	User / Project / Session memory with semantic search
Session Management	Persistent sessions with history restore
Safety Boundaries	Bash safety checks, audit logging, permission modes
Streaming Output	Real-time LLM responses with Markdown rendering
Skills System	Builtin, user, and project-level skill extensions

Configuration

Minimal user config — the agent controls internal parameters.

{
  "apiKey": "sk-xxx",
  "apiBaseUrl": "https://coding.dashscope.aliyuncs.com/v1",
  "defaultModel": "glm-5",
  "fallbackModel": "qwen-plus",
  "toolConfirmation": "allow"
}

Field	Description
apiKey	LLM API key
apiBaseUrl	API endpoint URL
defaultModel	Default model
fallbackModel	Fallback model on failure
toolConfirmation	Tool confirmation mode: allow, deny, or ask
webSearch	WebSearch mode/provider: auto, tavily, brave, ddg

Configuration priority: CLI flags > ~/.openhorse/openhorse.json > env vars > defaults

See docs/config.md for full details.

Models

OpenHorse supports OpenAI-compatible providers and auto-discovers model context windows at startup via the /models endpoint.

Provider	Example Models
GLM (智谱)	glm-5, glm-4
Qwen (通义)	qwen-turbo, qwen-plus, qwen-max, qwen-long
OpenAI	gpt-4o, gpt-4o-mini, gpt-4
Claude	claude-sonnet-4-6, claude-opus-4-8
DeepSeek	deepseek-chat, deepseek-reasoner

Context usage is tracked in real tokens. When usage reaches 95%, auto-compact generates a summary of early messages to free up space.

/model               # Show current model
/model list          # List all available models
/model glm-5         # Switch to GLM-5

Tools

20+ built-in tools the LLM can invoke:

Category	Tools
File	read_file, write_file, edit_file, list_files, glob, grep
Shell	exec_command (with safety checks)
Network	web_fetch, web_search
Memory	memory_save, memory_recall, memory_forget
Task	todo_write, enter_plan_mode, exit_plan_mode
Git	git_command
MCP	Connected MCP server tools (e.g. mcp__filesystem__read_file)

MCP Protocol

OpenHorse connects stdio MCP servers and exposes their tools to the agent.

// ~/.openhorse/mcp.json
{
  "mcpServers": {
    "telegram": {
      "command": "node",
      "args": ["path/to/plugin-telegram/dist/index.js"]
    }
  }
}

/mcp                # Show MCP server connection status

Interactive Commands

Command	Description
/help /h	Show help
/status /s	System status
/model	View or switch models
/config	Show configuration
/cost	Token usage and cost
/compact	Trigger context compact
/sessions	List recent sessions
/resume	Resume last session
/memory	Memory system status
/skills	List loaded skills
/mcp	MCP server status
/clear	Clear screen
/exit /q	Exit

Development

npm install      # Install dependencies
npm run dev      # Development mode (hot reload)
npm run build    # Build
npm test         # Run tests
npm run lint     # Lint
npm run format   # Format

Contributing

Issues and Pull Requests are welcome!

License

MIT License — see LICENSE for details.

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OpenHorse — Universal Agent Harness Framework.

"AI as a horse, OpenHorse as the reins."