// ============================================================================
// 001 — Hello World
// ============================================================================
// The simplest Soma program: a cell with one handler that prints a greeting.
//
// Run:   soma run 001_hello_world.cell greet
// Expect: Hello, World!

// Every Soma program lives inside a "cell" — the fundamental unit of code.
// A cell has a name (here "Hello") and contains handlers defined with "on".
cell Hello {

    // "on" defines a signal handler — like a function you can call from outside.
    // This one takes no arguments and returns a String.
    on greet() {
        // print() writes to stdout
        print("Hello, World!")

        // The last expression or explicit return is the handler's return value
        return "Hello, World!"
    }
}