Overview - Forst

JavaScript backends often need three things when adopting Forst: generated client types, calling Forst functions over HTTP, and testing and security controls.

Install @forst/cli first. Add a postinstall script that runs forst generate .. Run generate once before you import @forst/gen. Details are on the Installation page.

import { $auth } from "@forst/gen/auth";

const { valid } = await $auth.VerifyPassword({
  plainPassword: "secret",
  passwordHash: "$2a$...",
});

Start here

Goal	Guide
Get a typed client into your app	Generate a TypeScript client
Call Forst functions from Express, Remix, or scripts	Call Forst over HTTP
Secure the local invoke socket and process boundary	Invoke security
Stub Forst in unit or integration tests	Testing
Use Effect with generated clients	Effect mode
Call legacy JavaScript from compiled Forst (opposite direction)	Call JavaScript from Forst

Installation

@forst/cli, postinstall, and first generate.

Mix with Go packages

Forst compiles to Go — import stdlib and third-party packages.

Dev server

forst dev HTTP contract for local iteration.