The language for agent‑written code.

struct Order:
    item: str
    qty: int
    price: float

fn total(orders: [Order]) float:
    t = 0.0
    for o in orders:
        t += float(o.qty) * o.price
    return t

fn main():
    orders = [Order("tea", 2, 3.5), Order("scone", 3, 2.25)]
    busiest = orders.sort_by(fn(o) -o.qty)[0]
    print(f"total {total(orders)}, most ordered: {busiest.item}")

import roost
import json
import sqlite
from todos_db import list_todos         # typed, from queries.sql

fn todos(req: roost.Request, d: sqlite.Db) roost.Response:
    return roost.json(json.encode(list_todos(d)))

fn main():
    d = sqlite.open("todos.db")
    r = roost.router()
    r.get("/todos", fn(req) todos(req, d))
    roost.serve(r, 8080)

fn is_prime(n: int) bool:
    if n < 2:
        return false
    d = 2
    while d * d <= n:
        if n % d == 0:
            return false
        d += 1
    return true

fn main():
    n = 2_000_000
    found = [false] * n
    parallel for i in 0..n:        # on every core
        found[i] = is_prime(i)     # each i writes only found[i]
    print(len(found.filter(fn(p) p)), "primes below", n)

-- name: find_todo :one
SELECT id, title, done FROM todos WHERE id = @id;

-- name: add_todo :one
INSERT INTO todos (title) VALUES (@title)
RETURNING id;

import sqlite
import todos_db             # tern sqlgen queries.sql -o todos_db.tn

fn main():
    d = sqlite.open("todos.db")
    id = todos_db.add_todo(d, "ship it").unwrap()
    if todos_db.find_todo(d, id) is Some(t):      # Option[Todo]
        print(t.title, t.done)