janet-lang/janet

Health v2 · maintenance only

Adoption not part of the score

4370 stars · 274 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Janet is a dynamic functional and imperative Lisp-like programming language with its own bytecode VM, implemented in a single embeddable C source file. It ships with a REPL, interpreter, compiler, and rich core library including threads, networking, an event loop, and PEG parsing.

Use cases

• system scripting
• embed a scripting language in a C or C++ application
• rapid prototyping with a dynamic language
• write automation scripts with built-in networking and event loop
• export standalone executables from scripts
• learn a small Lisp with macros and REPL

When to choose

• you want an embeddable scripting language smaller and easier to port than Lua alternatives with more batteries included
• you need a lightweight single-binary language for system scripting
• you want direct C interop and dynamic library loading
• you need built-in threads, green threads, and an event loop out of the box

When to avoid

• you need a large ecosystem of third-party libraries like Python's
• you require heavy static typing or compile-time safety guarantees
• your team depends on mainstream language tooling and hiring pools
• you need high-performance numeric computing with mature GPU or array ecosystems

Facets

cli-tool · maturity stable

interpreter programming-language cli concurrency networking programming-languages developer-tools windows bsd cross-platform cli c lisp bytecode-vm embeddable macros repl peg-parsing functional-language scripting-language c-interop command-line automation linux macos

Member repositories

For agents

markdown · JSON · MCP: product_card(name="janet-lang/janet")