Hi everyone,
I'm Colby, and I'd like to share a developer tool I've been building called GRAFT — it's in private beta now, and I'm looking for developers willing to try it on real projects and give honest feedback.
The idea
Developers constantly rebuild things they've already solved in older projects — authentication flows, billing logic, notification pipelines. The usual move is to treat the old project as a folder of code to copy from, then hope it still works in its new home.
GRAFT treats your old projects as a memory of working software capabilities instead:
- Find it — point GRAFT at your local projects and it discovers capabilities you've already built, understanding the behavior and contract around each one.
- Fit it — it assesses whether a capability fits the architecture of your new project before anything moves.
- Prove it — after carrying it over, it verifies the capability still works in its new home by running HTTP acceptance tests against the running application, producing exportable, tamper-evident proof. Not a green checkmark — evidence you can verify offline.
This is explicitly not another AI coding assistant or chatbot. The point is reusing proven functionality you already own, with proof it still works.
Local by design
Everything runs on your Mac. Your code is never uploaded, and there's no telemetry.
The beta
The private beta is free for approved testers: a 30-day license for one Apple Silicon Mac. Apply at leftsocklabs.com and the license key and download link arrive automatically by email.
Requirements: Apple Silicon (M1 or later), macOS 13+, Git. One heads-up: the beta build is ad hoc signed rather than notarized, so the first launch needs a one-time override in Privacy & Security — the site walks through it.
Demo video: 90s real walkthrough — https://youtu.be/z-xQD8UWXw8?is=fMwk_IKnnxpG-2cA
I'd genuinely like feedback and questions — especially from anyone willing to try it on a real project. What's the capability you've rebuilt most often?
Thanks,
Colby
LeftSock Labs