# flix/flix

The Flix Programming Language

Repository: https://github.com/flix/flix
Canonical: https://ross.abutalabs.com/products/flix
Homepage: https://flix.dev/
Language: Flix
License: NOASSERTION
License Family: other
Topics: flix, language, hacktoberfest, functional, imperative, logic, jvm, programming-language
Last push: 2026-08-26T20:01:58+00:00

## Health v2 (maintenance only)
Score: 99/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 98, longevity 100
- inputs: {"age_days": 4100, "days_push": 7, "days_rel": 18, "gap_med": 13.5, "n_releases_24m": 39}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2734, forks 189 (observed 2026-08-28T04:07:16.217969+00:00)

## What it is
Flix is a statically typed, effect-oriented programming language that combines functional, imperative, and logic programming paradigms, developed at Aarhus University. It compiles to the JVM, ships with a compiler that doubles as an LSP server, and includes a VSCode extension and extensive standard library.

## Use cases
- learn an effect-oriented functional programming language
- write statically typed functional programs on the JVM
- experiment with algebraic effects and handlers
- build general-purpose applications with logic programming features
- research programming language design and type systems
- use a functional language with LSP support in editors like Neovim or VSCode

## When to choose
- you want a modern statically typed language with a full effect system on the JVM
- you need functional, imperative, and logic programming in one language
- you want strong editor tooling via LSP with types and effects surfaced in the IDE
- you are doing programming-languages research or teaching

## When to avoid
- you need LLVM or WebAssembly compilation targets
- your team relies on object-oriented features like subtyping
- you need a mature ecosystem with extensive third-party libraries
- you cannot run Java 21+ on your target platform

## Facets
- artifact type: cli-tool
- maturity: active
- function: programming-language, compiler, interpreter, type-system, cli, editor
- domain: programming-languages, compilers, developer-tools
- platform: jvm, cross-platform, cli, editor-plugin
- tags: effect-system, functional-programming, logic-programming, lsp, jvm-language, statically-typed, vscode-extension

## Member repositories
- flix/flix (main) score 99

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:16.217969+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 2026-08-30T02:14:28.152767+00:00, confidence not recorded.
  - readme: https://github.com/flix/flix (fetched 2026-08-28T04:07:16.217969+00:00, sha c23f3a4ee3f2)
  - homepage: https://flix.dev/ (fetched 2026-08-29T09:57:35.865697+00:00, sha ae413200c9ea)
  - site_page: https://flix.dev/documentation (fetched 2026-08-29T09:57:35.869100+00:00, sha dad4ce8147f6)
  - site_page: https://doc.flix.dev/getting-started.html (fetched 2026-08-29T09:57:35.872644+00:00, sha 5bb657b4e63b)
  - site_page: https://flix.dev/faq (fetched 2026-08-29T09:57:35.870822+00:00, sha 58ca34263311)
- Data as of 2026-08-30T08:39:29.467469+00:00.