🔀 Fusion

Two of the best AI models — Claude and GPT — plan your hardest tasks together, so you catch more and miss less.

Fusion is a plugin for Claude Code. When a task is big or tricky, one model alone can miss things. So Fusion has Claude and GPT think it through independently — each one filling gaps, questioning assumptions, and catching what the other might overlook. Then it hands you one clear plan to build from. It runs on the AI tools you already pay for, so there's no extra cost.

flowchart TD
    A["📝 Your task"] --> B["🟠 Claude plans it<br/>on its own"]
    A --> C["🟢 GPT plans it<br/>on its own"]
    B --> D["🔀 Fusion combines both<br/>into one plan"]
    C --> D
    D --> E["✅ One clear plan"]

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How it works

1. You give Fusion a task — something big, tricky, or where you'd just like a second opinion.
2. Claude and GPT each make their own plan. Neither one sees the other's answer, so you don't get just one model's view — you get two.
3. Fusion puts them together into one plan. If the two models disagreed on something, it tells you instead of hiding it.
4. You get one clear plan you can start building from — saved on your own computer, so you can come back to it later.

What you need

• You need a paid Claude Code plan.
• You need a paid Codex plan.
• You should be logged in to your Codex account.
• Bun should be installed on your system.

Get started

Open Claude Code in your terminal, then run these commands one by one:

1. /plugin marketplace add Adityalingwal/Fusion
2. /plugin install fusion@fusion
3. /fusion <your task>

Staying up to date

Fusion improves over time. To stay up to date with the latest version, copy and run these commands directly in your terminal:

claude plugin marketplace update fusion
claude plugin update fusion@fusion

That's it — the update applies right away, no restart needed. See CHANGELOG.md for what's new in the latest version.

Usage

Command	What it does
/fusion <your task>	Run Fusion on a task and get one clear plan
/fusion resume	Pick up an interrupted run where it stopped
/fusion dashboard	Open a local page to browse your past runs
/fusion dashboard-close	Close the dashboard when you're done

While a Fusion run is in progress, open the dashboard from a new Claude Code session — just run /fusion dashboard there.

When to use it · When to skip it

Use Fusion when…	Skip it when…
The task is big, or you're not sure how to approach it	It's a tiny change — a typo or a one-line fix
You'd like to see more than one point of view	You already know exactly what to do

Privacy

Everything stays on your machine — your runs are saved locally, and nothing is sent anywhere except to the Claude and Codex tools you already use.

License

MIT © 2026 Aditya Lingwal — see LICENSE.