Agent harness
Codex CLI
OpenAI's open-source coding agent for the terminal, with IDE integrations; supports AGENTS.md and skills.
Why it is useful
A second harness for cross-checking another agent's work or running reviews with a different model family.
Facts
- Kind
- Agent harness
- Source
- https://github.com/openai/codex
- Repository
- openai/codex
- Author
- OpenAI
- License
- Apache-2.0
- Works with
- codex
- Added
- 2026-11-04
- Last verified
- 2026-11-04 via git ls-remote (HEAD 71a4c07036)
- Found via
- seed
Tags
Related
- Skill pack
Anthropic Agent Skills
Anthropic's public Agent Skills: document skills (docx, pdf, pptx, xlsx), skill-creator, mcp-builder, frontend-design, webapp-testing and more, plus the Agent Skills spec and a template.
- Agent SDK
Claude Agent SDK for Python
Python SDK that exposes Claude Code's agent loop, tools, hooks and MCP support so you can build your own agents in Python 3.10+.
- 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.
- Plugin marketplace
Claude Code Plugins Directory
Anthropic's curated Claude Code plugin directory: internal plugins such as code-review, feature-dev, hookify, plugin-dev, LSP integrations and ralph-loop, plus partner plugins under external_plugins.
- MCP server
Cloudflare MCP Servers
Cloudflare's domain-specific remote MCP servers (docs, Workers bindings, observability and more) over Streamable HTTP; the README recommends the newer Cloudflare API MCP server.
- Plugin marketplace
Cursor Plugins
Cursor's official multi-plugin marketplace: pstack, thermos, ralph-loop, continual-learning, orchestrate, advisor, cursor-team-kit and integrations such as GitHub, Playwright and X.