Develop

Claude and Codex take turns on your work, and you approve what they do.

How it works

Two models, one thread

Claude and Codex, or two of either.

Plan, build, review

Each model takes a role. Planners and reviewers cannot edit.

You approve each step

File changes, commands, and tools wait for your yes.

The plan as cards

Press a card to see the work done under it.

Side chats

Ask one model something off the record.

Requirements, kept current

One document per project, updated as you answer.

A fresh start, same thread

Wrap and Continue clears the models’ context.

Your tools, per project

Connect tools; their keys stay in Claude Code or Codex.

Review This, with Proof

Open the change in Chrome and send back a review.

Stays on this Mac

Develop answers only this Mac. Your repositories stay in your folders.

Your own accounts

Uses the official Claude Code and Codex, signed in as you.

One place for updates

Develop, Claude Code, and Codex, with plain release notes.

Request Early Access

Private release for macOS 14 and later on Apple silicon. Needs Claude Code or Codex.