Agent harness

4 open-source agent harness entries for AI coding agents, with source links, licenses and verification dates.

• Agent harness

  Claude Code

  Anthropic's agentic coding tool for the terminal, IDE and GitHub. The public repository holds the changelog, issue tracker and example plugins.

  • coding-agent
  • terminal
  • official
  • headless
• Agent harness

  Codex CLI

  OpenAI's open-source coding agent for the terminal, with IDE integrations; supports AGENTS.md and skills.

  • coding-agent
  • terminal
  • official
• Agent harness

  OpenCode

  Open-source terminal coding agent that works with many model providers, with a desktop app and an npm CLI.

  • coding-agent
  • terminal
  • multi-provider
• Agent harness

  Pi

  A minimal, extensible coding-agent harness: customise it with extensions, skills, prompt templates and themes; run it interactively, in print or JSON mode, over RPC or through its TypeScript SDK.

  • coding-agent
  • terminal
  • extensible
  • headless