Skip to content
Search

OpenHarness

lastmod 2026-04-15created 2026-04-152 edits

Open agent harness with the built-in personal agent Ohmo

About

  • Lightweight open-source Python infrastructure that wraps an LLM to turn it into a real agent, integrating tool use, skills, memory, and multi-agent coordination into a single package
  • Provides 43 built-in tools (File I/O, Shell, Search, Web, MCP, etc.), all supporting Pydantic validation, parallel execution, permission checks, and PreToolUse/PostToolUse hooks
  • The built-in personal agent ohmo chats on Feishu / Slack / Telegram / Discord and automatically forks branches, writes code, runs tests, and opens PRs
    • Works with an existing Claude Code or Codex subscription; no separate API key needed
  • anthropics/skills-compatible skill system: copy .md files into ~/.openharness/skills/ and they are usable immediately; 40+ built-in skills
  • claude-code plugins-compatible plugin system; 12 official plugins tested (commit-commands, security-guidance, code-review, etc.)
  • Manages providers as workflow-based profiles and can switch between many LLM backends such as Anthropic, OpenAI, Copilot, Codex, Moonshot/Kimi, Gemini, Groq, and Ollama
  • Auto-Compaction: preserves task state and channel logs even during context compaction, so agents can keep a session going and work for days
  • Ensures safety with a multi-level permission system (Default/Auto/Plan Mode) plus path-level rules and command deny lists
  • Swarm Coordination: subagent creation and delegation, team registry, background task lifecycle management
  • Provides a React/Ink-based terminal UI, supporting a command picker, permission dialogs, session resume, and Markdown rendering
  • In non-interactive mode, -p for a single prompt and --output-format json/stream-json enable pipe and script automation
  • MIT License / Python

See also

  • AI Agent
  • Shimmy - Lightweight, privacy-focused personal OpenAI API server that can replace Ollama
  • Hermes Agent - Self-learning autonomous AI agent that creates and improves skills from experience
  • GoClaw - Multi-agent gateway that rebuilds OpenClaw in Go (redesigned with a focus on security and performance)
  • oh-my-agent - Practical multi-AI IDE agent harness

Favorite site

author Zer0 sitemap