# jank-lang/jank

jank is the native Clojure dialect with seamless C++ interop.

Repository: https://github.com/jank-lang/jank
Canonical: https://ross.abutalabs.com/products/jank
Homepage: https://jank-lang.org
Language: C++
License: MPL-2.0
License Family: copyleft
Topics: functional-programming, compiler, clojure, language, jit, lisp, llvm, cpp, programming-language, native
Last push: 2026-08-26T22:09:30+00:00

## Health v2 (maintenance only)
Score: 67/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 8, longevity 100
- inputs: {"age_days": 4445, "days_push": 7, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3319, forks 130 (observed 2026-08-28T04:07:56.159154+00:00)

## What it is
jank is a Clojure dialect compiled to native code via LLVM, with seamless C++ interop including templates, virtual functions, exceptions, and RAII. It provides REPL-driven development powered by a Clang-based JIT compiler and Cargo-inspired native dependency management.

## Use cases
- write Clojure code that compiles to native binaries
- call C++ libraries from a Lisp without boilerplate bindings
- REPL-driven development with JIT-compiled C++ interop
- build native applications with immutable persistent data structures
- use C++ templates and overload resolution from a dynamic language
- replace JVM Clojure with a native runtime for performance

## When to choose
- you want Clojure semantics with native C++ performance
- you need to interop with existing C/C++ codebases from a Lisp
- you want interactive REPL development that compiles to native code

## When to avoid
- you need production stability - jank is explicitly alpha quality
- you rely on the JVM Clojure ecosystem and Java libraries
- you need Windows support or mature tooling

## Facets
- artifact type: cli-tool
- maturity: experimental
- function: compiler, interpreter, programming-language, cli, package-manager
- domain: programming-languages, compilers, developer-tools
- platform: cpp
- tags: clojure-dialect, llvm, jit, cpp-interop, lisp, functional-programming, clang, native-code, linux, macos

## Member repositories
- jank-lang/jank (main) score 67

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:56.159154+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:42:02.439212+00:00, confidence not recorded.
  - readme: https://github.com/jank-lang/jank (fetched 2026-08-28T04:07:56.159154+00:00, sha 100a2b524cac)
  - homepage: https://jank-lang.org (fetched 2026-08-29T09:34:56.223615+00:00, sha fc6f77554371)
  - site_page: https://book.jank-lang.org/getting-started/01-installation.html (fetched 2026-08-29T09:34:56.234419+00:00, sha d0aa10078a41)
  - site_page: https://book.jank-lang.org/ (fetched 2026-08-29T09:34:56.232494+00:00, sha cd17a27bc073)
- Data as of 2026-08-30T08:39:29.467469+00:00.