Install & run

Langoost is in active development. Today you build it from source with the Go toolchain; prebuilt binaries are planned for a later release.

Prerequisites

• Go 1.21 or newer

Build from source

$ git clone <langoost-repo>
$ cd langoost
$ go build -o langoost .

This produces a single langoost binary in the current directory.

During development you can skip the build step and run directly with go run . run script.goost.

Your first script

Create hello.goost:

let name: string = "world"
print("Hello, " + name + "!")

Run it:

$ ./langoost run hello.goost
Hello, world!

The REPL

Start an interactive session to experiment line by line:

$ ./langoost repl
> let x = 21
> print(x * 2)
42

Press Ctrl+D to exit.

Server mode

Langoost can run as a persistent execution server — the model it’s designed for. The process stays warm and serves requests with no cold start:

$ ./langoost server --port 8080

To build an HTTP API directly from a script instead, see the HTTP server guide.

Inspect the bytecode

Curious what the compiler produces? Disassemble any script:

$ ./langoost disasm hello.goost

Next: take the language tour.