SmithableSoft to change. Hard as steel.

Build a neighborhood marketplace for second-hand

A marketplace where neighbors sell second-hand things: a public catalog with photos, prices and filters. Change it by prompt, form or code.

The Marketplace starter

Built as it is, this description makes the Marketplace starter at once, with no AI. Change it first and the app follows your words.

The Marketplace starter

What it is

  • Buy and sell second-hand things in your neighborhood.
  • Photos of items are reviewed before others see them; an item waits until its photos are.
  • Open to anyone without signing in: the home page, the catalog page and reading items.
The Marketplace starter, picture 1The Marketplace starter, picture 2

One change. Three ways.
The app follows.

Say it, fill in a form, or write the line: it is the same change, and the app has it at once.

The app's /my-items/new page before the changeThe app's /my-items/new page after the change: the new-item form gains a Brand field

“Items need a brand”: the form gains the field, whichever way made it.

All starters · The starters in the docs

How it works

  1. Describe it, or write the fileYour words become the app's spec: its records, pages and who may do what, in a short file you can read and edit (smithable.yml).
  2. The app follows the fileChange the description or the file and Smithable rebuilds the app, checks it and keeps its data. Every change can be undone.
  3. The code is yoursA real TypeScript web app: download it, run it anywhere, or hand it to a client. The engine is open source.
Try it now, no sign-up →