# wren-lang/wren

The Wren Programming Language. Wren is a small, fast, class-based concurrent scripting language.

Repository: https://github.com/wren-lang/wren
Canonical: https://ross.abutalabs.com/products/wren
Homepage: http://wren.io
Language: Wren
License: MIT
License Family: permissive
Topics: wren, scripting-languages, c, fibers, language, bytecode, interpreter
Last push: 2025-11-19T22:18:55+00:00

## Health v2 (maintenance only)
Score: 47/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 53, release rhythm 8, longevity 100
- inputs: {"age_days": 4671, "days_push": 287, "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 8122, forks 628 (observed 2026-08-28T04:10:13.729628+00:00)

## What it is
Wren is a small, fast, class-based concurrent scripting language implemented as an embeddable C library with a bytecode VM and lightweight fibers. It is designed to be embedded in host applications via an easy-to-use C API with no dependencies beyond the C standard library.

## Use cases
- embed a scripting language in a C or C++ application
- add a fast lightweight scripting VM to a game engine
- scripting language with class-based OOP and coroutines
- small dependency-free interpreter to compile into my app
- learn how a bytecode VM and compiler are implemented
- run Wren scripts from the command line

## When to choose
- you need a tiny, fast, embeddable scripting language with a clean C API
- you want class-based objects and fiber-based concurrency in a Lua-sized package
- you want readable, well-commented VM source you can study or vendor directly

## When to avoid
- you need a large standard library or rich ecosystem of third-party packages
- you want a standalone general-purpose language with batteries included
- you need guaranteed long-term maintenance, as development activity is modest

## Facets
- artifact type: library
- maturity: stable
- function: programming-language, interpreter, compiler, concurrency
- domain: programming-languages, developer-tools, embedded-systems
- platform: c, cpp, cross-platform, embedded
- tags: scripting-language, bytecode-vm, fibers, embeddable, class-based, coroutines, small-language, scripting

## Member repositories
- wren-lang/wren (main) score 47

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:13.729628+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 2026-08-29T17:30:37.660943+00:00, confidence not recorded.
  - readme: https://github.com/wren-lang/wren (fetched 2026-08-28T04:10:13.729628+00:00, sha b14894668976)
  - homepage: http://wren.io (fetched 2026-08-29T08:28:36.441220+00:00, sha bcef3874a292)
  - site_page: https://wren.io/getting-started.html (fetched 2026-08-29T08:28:36.450843+00:00, sha 387daade39a0)
- Data as of 2026-08-30T08:39:29.467469+00:00.