openai/codex

This page introduces an external open-source repository. It is not an HDATF product.

What it does

Codex CLI is OpenAI's coding agent that runs locally in the terminal. The same agent is also offered as an extension for editors such as VS Code and Cursor, and as a desktop app.

How it helps ATF

How a local coding agent receives a task and returns its work is a reference for Harness. It is worth comparing when coding work goes to an executor and the result has to be checked.

License

Apache-2.0 Permissive, with a patent grant. Commercial use is allowed; keep the notices and state your changes.

More in this category

• openai/codex-plugin-cc
  A plugin that calls Codex from inside Claude Code. Slash commands run a normal or adversarial code review, delegate tasks, hand off sessions, and check status, fetch results or cancel background jobs.
• ultraworkers/claw-code
  Claw Code is a public Rust implementation of the claw CLI agent harness. The project calls itself an agent-managed museum exhibit, not a production product, developed and maintained by other harnesses without human intervention.
• freecodexyz/free-code
  A fork of the Claude Code CLI built from source exposed through an npm source map, according to its readme. It removes telemetry and security-prompt guardrails and enables experimental features.
• luongnv89/claude-howto
  Claude How To is a visual, example-based guide to Claude Code that goes from basic use to slash commands, hooks, memory, skills, subagents and MCP servers. It also offers copy-paste templates and a suggested learning path.
• Kuberwastaken/claurst
  An open source terminal coding agent in Rust that supports multiple model providers. It began as a clean-room reimplementation of Claude Code behavior and adds chat forking, memory consolidation, plugins and an experimental multi-turn goal mode.

Only repositories in the ranked Trendshift lists are included, and the lists are used only to find candidates. We do not copy their ranks. Descriptions, licenses and star counts come from each GitHub repository. The notes are our own reading. We have not tested these projects, and a place on a trending list does not prove quality.