# Forst

- [Introduction](https://forst-lang.org/docs/index.md)
- [Why Forst?](https://forst-lang.org/docs/why.md): Design priorities, what you get from Forst, and what the language omits.
- [Quickstart](https://forst-lang.org/docs/quickstart.md): Install Forst, write a validated handler, and run it in five minutes.
- [Installation](https://forst-lang.org/docs/installation.md): Install the Forst compiler via npm, .deb, Docker, or native binary.
- [Language overview](https://forst-lang.org/docs/language/overview.md): Aligned with Go, structural typing, and explicit control flow.
- [Describe a shape](https://forst-lang.org/docs/language/shapes-and-constraints.md): Define API boundaries as types with built-in validation.
- [Check a value](https://forst-lang.org/docs/language/check-a-value.md): Language-level early returns as an alternative to manual checks.
- [Name a reusable rule](https://forst-lang.org/docs/language/name-a-rule.md): Give a domain rule a name, then reuse it at every check.
- [List alternatives](https://forst-lang.org/docs/language/union-and-intersection-types.md): Describe values with literal alternatives, error sets, or shared requirements.
- [Return a named error](https://forst-lang.org/docs/language/named-errors.md): Give each expected failure a name and fields the caller can use.
- [Functions that can fail](https://forst-lang.org/docs/language/result.md): A function returns a value or a failure. Check success before you use the value.
- [Providers (DI)](https://forst-lang.org/docs/language/providers.md): Declare shared runtime services and supply them at entry points.
- [Mix with Go packages](https://forst-lang.org/docs/interop/go.md): Transpile to Go, import packages, and mix `.ft` with `.go` in one module.
- [Overview](https://forst-lang.org/docs/interop/invoke.md): Call Forst backend functions from JavaScript and TypeScript applications.
- [Generate a TypeScript client](https://forst-lang.org/docs/interop/invoke/generate-types.md): Run `forst generate` and import typed clients from `@forst/gen`.
- [Call Forst over HTTP](https://forst-lang.org/docs/interop/invoke/call-forst.md): Call Forst functions from JavaScript and TypeScript applications over HTTP.
- [Invoke security](https://forst-lang.org/docs/interop/invoke/security.md): Local transport, authentication, and header rules for calling Forst over HTTP.
- [Testing](https://forst-lang.org/docs/interop/invoke/testing.md): Replace Forst calls in tests, or start a real invoke server.
- [Effect mode](https://forst-lang.org/docs/interop/invoke/effect.md): Use Effect to call Forst with typed errors, managed services, retries, and cancellation.
- [Overview](https://forst-lang.org/docs/interop/bridge.md): Call legacy TypeScript and JavaScript from compiled Forst binaries.
- [Import and call JavaScript](https://forst-lang.org/docs/interop/bridge/import-and-calls.md): Import legacy JavaScript modules in Forst, call sync or async functions, and iterate over generators.
- [Build, deploy, and runtime modes](https://forst-lang.org/docs/interop/bridge/build-and-runtime.md): Compile Forst applications with JS imports, choose runtime hosts, and configure bridge security.
- [Bridge security](https://forst-lang.org/docs/interop/bridge/security.md): Analyze the security model, allowlists, path jailing, and local IPC boundaries of the JavaScript bridge.
- [CLI reference](https://forst-lang.org/docs/workflow/cli.md): `forst run`, `build`, `generate`, `dev`, `lsp`, and other commands.
- [Dev server](https://forst-lang.org/docs/workflow/dev-server.md): Local iteration with `forst dev` — HTTP contract, regenerate on save, and `ftconfig`.
- [Plugins](https://forst-lang.org/docs/workflow/plugins.md): Extend `forst generate` with semantic plugins (work in progress).
- [Editor workflow](https://forst-lang.org/docs/workflow/editor.md): Install the Forst VS Code extension and use diagnostics, hover, and navigation on `.ft` files.
- [For agents](https://forst-lang.org/docs/resources/llms.md): Compressed Forst usage for LLMs. Start here before reading full docs. Pair with /llms.txt or /llms-full.txt on this site.
- [Roadmap](https://forst-lang.org/docs/resources/roadmap.md): What exists, what is in flight, and what Forst deliberately omits.

## Optional

- [GitHub](https://github.com/forst-lang/forst)
- [npm](https://www.npmjs.com/package/@forst/cli)
- [Roadmap](https://github.com/forst-lang/forst/blob/main/ROADMAP.md)


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.