Source record · 2026

Codex as a platform: build on the open agent harness

Nicolas Bonamy and Derrick Choi

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Type: Official product documentation
Publication: OpenAI Developers
Version used: Published 19 August 2026
Source date: 19 August 2026
Recorded in Atlas: 24 October 2026
License: Atlas paraphrase; no source figure reproduced.

Documentation checked 24 October 2026; not an independent test of effectiveness. No separate validity period has been established for the finding.

How Atlas uses this source

Keep Codex on track

The reusable part is the agent loop

Codex supplies the execution system; the file kit is an Atlas workflow convention.

Open the source passage

Supports this claim:Codex supplies the execution loop