Twitter/X

The Codex harness is open source and powers third-party agents such as OpenCode…

2026-03-31 · 14:38 UTC ·@derrickcchoi ·0 min read

Brief

The Codex harness is open source and powers third-party agents such as OpenCode and Cline; author Derrick C. Choi (tweeted March 31, 2026) frames this as support for an open-source community around OpenAI Codex and directs readers to github.com/openai/codex to inspect and customize the project.

Source evidence

title: @derrickcchoi: We believe in an open source community with @OpenAI Codex.

The Codex harness is open source and po...
author: @derrickcchoi
contenttype: tweet
publication: Twitter/X
published: 2026-03-31T14:38:43+00:00
sourceurl: https://x.com/derrickcchoi/status/2038989373488648614

word_count: 34

We believe in an open source community with @OpenAI Codex.

The Codex harness is open source and powers third-party agents like OpenCode and Cline.

You can check it out yourself and customize it: github.com/openai/codex