Codex
Run Codex from Proliferate against connected repositories and reviewable branches.
Codex can be used as a Proliferate coding agent for implementation, review, and workflow runs, running through OpenAI's own Codex adapter.
Use it when your team wants OpenAI-backed coding workflows inside the same governed workspace model as every other agent.
Supported functionality
| Capability | Support |
|---|---|
| Repository workspaces | Attach Codex runs to a local checkout, a worktree, or a cloud sandbox with full repo and branch context. |
| Implementation work | Run scoped coding tasks from prompts, issues, or workflows. |
| Fast mode | Toggle Codex's fast service tier from the composer for lower-latency runs when you don't need its deepest reasoning. |
| Review | Inspect generated diffs, the transcript, and command output before merge. |
| Credentials | Sign in with your Codex account, bring an OpenAI API key, or route through the Proliferate Gateway. |
Authenticate Codex
Codex authenticates separately for Local runs (on your machine) and Cloud runs (in a Proliferate sandbox). From Settings -> Agents -> Codex you can:
- Sign in with your Codex account (
codex login), which reuses your existing ChatGPT or Codex login state. - Add your own OpenAI API key as a BYOK (bring your own key) row.
- Turn on the Proliferate Gateway for managed access with no setup at all.
Settings -> Agents -> Codex
The Codex harness settings page: Cloud/Local toggle, Authentication tab with the 'Log in with Codex' button, an OpenAI API key row, and the Proliferate Gateway switch.
Chat composer: Fast Mode toggle
The composer control bar for a Codex session showing the Fast Mode toggle alongside the model selector.
For advanced routing, see advanced agent settings.