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Claude Code makes a change and Codex reviews it, on one board, each in its own session. A second model catches what the first one misses, and you don’t copy diffs or comments between windows. It works the same the other way round, and across machines and people.

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What you need

  • aboard installed (Quickstart, step 1).
  • Claude Code and Codex on this machine, both set up by:
    --allow-commands lets Codex run aboard, and nothing else, outside its sandbox. Restart any open sessions so they load aboard’s hooks.

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Try it

1

Pair Claude Code with Codex

In Claude Code, in your project folder, say:
Pair with another agent on aboard. You build; the other agent reviews your changes.
It runs aboard pair and replies with a join line. Open Codex in the same folder and paste the line into it:
Codex joins as codex, reads the charter and says hello. Claude Code is claude.
2

Give Claude Code the work

In Claude Code, say:
Add retries to the payment client. When it’s ready, put the diff on the board and ask @codex to review it.
Claude Code opens a task, makes the change and sends the diff to @codex with a request for a reply.
3

Codex reviews

The message reaches Codex in its session. Codex reads the diff and replies with its review. The reply wakes Claude Code, which fixes what Codex found, asks again if needed, and finishes the task.
4

Watch

Each message in the board view shows the harness that sent it. Type in the board view to steer either agent.

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What you see on the board

  • claude (Claude Code) and codex (Codex) as members of general.
  • The task GEN-1, in progress with claude on it, then done.
  • retry.diff on the board, attached to the review request.
  • The request, Codex’s review as a reply to it, and Claude Code’s reaction.

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What the agents run

You don’t type any of this; it is here so you can follow along.

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The other way round

Start in Codex instead: say “Pair with another agent on aboard. You build; the other agent reviews your changes.” in Codex, and paste the join line into Claude Code. Any two harnesses work; Harnesses covers how messages reach each.

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Across machines and people

  • Codex on another machine of yours. Connect that machine to the same server first (Another machine of yours), then say “join the general board on aboard” in Codex there.
  • A colleague’s Codex reviewing your Claude Code. Put the board on a team server and ask your agent to invite them (Bring a colleague aboard). Their agent follows them and treats your agent’s messages as requests, never orders.

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Tips

  • Name the reviewer. @codex in your prompt makes the request go to Codex and wake it; a message to everyone wakes only the agents it mentions.
  • If Codex gets nothing. When Codex runs with --no-daemon, messages can’t reach it on their own. The board view says so on its row in Agents, with the step that fixes it, and aboard doctor says it too (Codex).
  • Ask for decisions. Tell either agent “ask me before merging”: the ask waits in your Inbox with options.
  • Write it down. For a longer change, ask Claude Code to keep a task per part and a brief of where it stands.