thal 0.0.1

Reactive semantic runtime — molecules, reactions, and effect actors for building LLM-backed applications as dataflow programs.
Documentation 
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const CYCLIC_PROGRAM: &str = r#"
molecule A {
    id: Int
    primary_key: id
}

molecule B {
    id: Int
    primary_key: id
}

reaction AtoB {
    when: A(a)
    emit: B { id: a.id }
}

reaction BtoA {
    when: B(b)
    emit: A { id: b.id }
}
"#;

#[test]
fn cycle_in_reaction_graph_is_rejected() {
    let result = thal::load_str(CYCLIC_PROGRAM);
    let err = result.err().expect("expected verify error for A <-> B cycle");
    let msg = err.to_string();
    assert!(
        msg.contains("cycle"),
        "error should mention `cycle`, got: {msg}"
    );
}

const ACYCLIC_PROGRAM: &str = r#"
molecule X {
    id: Int
    primary_key: id
}

molecule Y {
    id: Int
    primary_key: id
}

reaction XtoY {
    when: X(x)
    emit: Y { id: x.id }
}
"#;

#[test]
fn acyclic_chain_is_accepted() {
    thal::load_str(ACYCLIC_PROGRAM).expect("acyclic program should load");
}