cc2codex

Bring a Claude Code setup into Codex with a safe preview first.

cc2codex is a migration assistant for people moving from Claude Code to Codex. The most reliable way to use it today is through the Codex CLI plugin flow, with the Codex app UI as a secondary path if local plugins appear there on your machine.

What Imports Well

• reusable Claude instructions and CLAUDE.md guidance
• skills that map cleanly into Codex skill directories
• agent workflows that can be simplified into Codex skills
• high-confidence hooks
• MCP server structure and local command configuration

What Still Needs Review

• MCP tokens, API keys, and other secrets still need to be re-entered
• Claude-only hook events may need cleanup or removal
• team-style Claude agent workflows may need redesign
• large or very Claude-specific instruction sets may need trimming after import

Quick Start

If you only copy one section, copy this one.

Recommended: Codex CLI Plugin Flow

1. Clone the repo and install dependencies:

git clone https://github.com/ussumant/cc2codex.git
cd cc2codex
npm install

1. Install the Codex plugin:

node bin/cc2codex.js install-plugin --force

1. Check that the install is healthy:

node bin/cc2codex.js verify-plugin-install

1. Start Codex in Terminal:

codex

1. Inside Codex, open the plugin manager:

/plugins

1. If you don't see the plugin in /plugins, add your personal marketplace root (one-time) and restart Codex:

codex plugin marketplace add ~

1. Enable Claude to Codex Migration Assistant.
2. Start a new thread and paste this:

Help me bring my Claude Code setup into Codex.

That starts the non-technical flow:

• Codex finds your old Claude setup automatically
• Codex creates a safe preview in /tmp/cc2codex-trial/.codex
• Codex explains what was imported and what still needs attention
• Codex only updates your real ~/.codex after you approve it

Recommended follow-up prompts:

Show me what was imported and what still needs my attention.

Finish importing my Claude setup into Codex.

If Codex says the plugin install is stale or broken, run:

node bin/cc2codex.js install-plugin --force

Optional: Codex App UI

If local plugins show up in the Codex app on your machine, you can also:

1. Restart the Codex app.
2. Open the Plugins page in the UI.
3. Look for Claude to Codex Migration Assistant.
4. Enable it and use the same prompts shown above.

If the plugin does not appear there, use the Codex CLI flow above instead.

CLI Fallback

node bin/cc2codex.js start --claude-home ~/.claude --codex-home ~/.codex

Run that from inside the cc2codex folder. If you want a global command, run npm link once and then use cc2codex start ....

Troubleshooting

Plugin install looks stale or broken

node bin/cc2codex.js install-plugin --force

Check whether the plugin install is healthy

node bin/cc2codex.js verify-plugin-install

Plugin does not appear in the Codex app

Use the Codex CLI route instead:

node bin/cc2codex.js verify-plugin-install
codex

Then inside Codex CLI:

/plugins

If the plugin still doesn't appear, add the personal marketplace root (one-time) and restart Codex:

codex plugin marketplace add ~

Codex says it cannot find your Claude setup

Make sure Claude Code data exists at ~/.claude, or use a custom Claude home path in advanced mode.

Error: Cannot find module '.../bin/cc2codex.js'

That means you ran:

node bin/cc2codex.js ...

from the wrong directory. Fix it by cd-ing into the repo folder first, or by running npm link and then using cc2codex.

Advanced Commands

Use these only if you want more control than the standard Codex CLI plugin flow provides.

start

cc2codex start [--claude-home ~/.claude] [--codex-home ~/.codex] [--trial-codex-home /tmp/cc2codex-trial/.codex] [--project ./my-project] [--yes] [--json]

Runs the guided migration flow with a safe preview before live cutover.

install-plugin

cc2codex install-plugin [--target-dir ~/.codex/plugins/cc2codex-migration-assistant] [--marketplace-path ~/.agents/plugins/marketplace.json] [--force]

Installs the bundled Codex migration plugin.

verify-plugin-install

cc2codex verify-plugin-install [--target-dir ~/.codex/plugins/cc2codex-migration-assistant] [--marketplace-path ~/.agents/plugins/marketplace.json] [--claude-home ~/.claude] [--json]

Checks plugin wiring, repo path, marketplace entry, and Claude home availability.

scan

cc2codex scan [--claude-home ~/.claude] [--project ./my-project] [--json]

Read-only inventory of a Claude Code setup.

doctor

cc2codex doctor [--claude-home ~/.claude] [--project ./my-project] [--codex-home ~/.codex] [--json]

Readiness report with risks and migration guidance.

guide

cc2codex guide [--claude-home ~/.claude] [--project ./my-project] [--codex-home ~/.codex] [--trial-codex-home /tmp/cc2codex-trial/.codex] [--json]

Step-by-step migration playbook.

plan

cc2codex plan [--claude-home ~/.claude] [--project ./my-project] [--codex-home ~/.codex] [--json]

Staged migration plan without writing files.

apply

cc2codex apply --global [--force]
cc2codex apply --skills [--force]
cc2codex apply --global --skills [--force]

Applies staged migration scopes.

validate

cc2codex validate [--codex-home ~/.codex]

Validates a migrated Codex setup.