Every change reviewed before it merges.
Line comments on your local changes and every pull request, then an agent fixes what it found.
See the change working.
The built-in browser clicks through the preview and records it, before you merge.
Fixed where the change lives.
Ask the agent to apply the fixes in the same chat, in the same worktree.
- Before you push
- Same worktree
- One chat
Every pull request, without asking.
Set it once, and a review runs whenever a pull request opens.
Reviews that never wait for your Mac.
Automated reviews can run in a cloud sandbox, on every plan.
Before you turn it on.
Does it need a pull request?
No. It reviews local changes before you push, and pull requests on GitHub when you have one.
Can it review every pull request automatically?
Yes. The PR Reviews automation runs a review whenever a pull request opens.
Does my code leave my machine?
Local review runs on your Mac, and the model sees only the code the review needs. Cloud automations use a remote sandbox.
What does it cost?
Free to start, and one subscription covers both apps. Agents on your own subscriptions bill to those, not to your credits.
Is it Mac only?
Yes, for now. Nucleus and Spaces are built for Apple silicon Macs, and there are no Windows or Linux builds yet.
Every change reviewed before it merges.
Review comes with Nucleus. Open your repo and run it.



