jlt-commons

Adoption

A Jolt project whose maintainer can no longer look after it, taken over so the community keeps a working version. We ask the current owner first, every time, and we prefer a transfer over a fork so the stars and the issue history come along.

Incubation

New work started here. Ports of widely used Clojure libraries, and new libraries that belong beside the language rather than inside it. Jolt's own author has started eight this way. The bar is a real gap and someone willing to maintain it, which is deliberately low while Jolt is this young.

Projects

Twenty-four so far. Six arrived by adoption, transferred rather than forked, so their history and issues came with them and each kept its original maintainer. Four moved over from jolt-lang, the split Jolt's author proposed. Fourteen were started here, by two different people.

Graphics and games

raylib-jlt - raylib bindings that call the system libraylib over its C ABI through jolt.ffi, with a keyword-argument drawing API on top. Docs.

raylib-jolt-demo - 187 raylib examples built on raylib-jlt, each one its own small runnable project. Docs and gallery.

raygui-jlt - 24 examples of raygui, raylib's immediate-mode GUI library, bound the same way. Docs and gallery.

raylib-ios - raylib and SDL2 on a physical iPhone, as portable bytecode with no JIT, because iOS forbids generating code at run time. The host loop, bindings and build tools. Docs.

raylib-ios-demo - what runs on raylib-ios: 137 scenes, each one a sub-project that builds an iPhone app of its own, plus a gallery app holding them all. Docs and gallery.

raylib-android - raylib on an Android phone as native arm64 code, with no JVM, Kotlin or Java anywhere in the app. Seventeen scenes under an owner loop of about thirty lines. Docs.

graviton - a physics game where you place gravitational attractors to steer a ship toward prizes and away from death zones. A Jolt and raylib port of a 2018 ClojureScript game, with its field math checked by writ.

User interfaces

glitter-core - the natives-free two-thirds of glitter: the Replicant-style reconciler and IRender/IMemory protocols, with no toolkit dependency at all. What glitter, glitter-uikit, and uikit-demo all build on. Docs.

glitter - a Replicant-style GTK4 renderer built on glitter-core: one state atom, a pure state -> hiccup view, and event handlers as data. Docs.

glitter-gl - OpenGL geometry, matrices and shaders for glitter, plus a :gl-area widget to draw them in. Docs.

glitter-uikit - the same renderer model driving native macOS NSView widgets through AppKit, rather than GTK4. Docs.

uikit-demo - a demo of glitter-uikit: a hub of live example windows (counter, currency converter, live FX, particle toy) built as a real macOS app bundle. Docs.

nexus-jolt - a Jolt port of nexus: data-driven action/effect/placeholder dispatch, used today by the glitter family. Docs.

ftxui-jolt - a reagent-style API over FTXUI, the C++ terminal UI library: components as functions returning hiccup, rendered through FTXUI's own event loop, focus handling and mouse support.

Concurrency and state

ebb - a port of missionary: composable tasks and flows with real cancellation and glitch-free dataflow, running on Chez fibers. Docs.

ensemble - Erlang processes and the OTP behaviours on Jolt's native fibers: links, monitors, selective receive, gen_server, gen_statem and supervisors.

tapestry - structured concurrency, where a unit of work is a derefable fiber that carries its result, errors, timeouts and cancellation. A port of teknql/tapestry onto core.async.

duratom - a durable atom that writes every change through to a pluggable backend. A port of jimpil/duratom.

Libraries and ports

instaparse - instaparse on Jolt: parsers from EBNF or ABNF grammars, including left-recursive and ambiguous ones.

mulog - the published mulog 0.9.0, with the Java classes it bundles supplied by portable Jolt registrations.

aws-api-jolt - the unmodified cognitect aws-api Maven release running on Jolt. It supplies an HTTP client and a host-class declaration, and nothing is forked.

clj-to-ys - translates Clojure source into idiomatic YS (YAMLScript), built on the instaparse port.

Checking and deciding

writ - checks plain Clojure against a spec of what the code is for: signatures, plus laws run through test.check. Built as a gate for code an LLM writes.

lev - a decision engine that answers typed questions about a state with calibrated probabilities, using small encoder models or a GGUF chat model through llama.cpp.

The six adopted projects and seven of those started here publish through docs-engine, so none of them maintains a site generator of its own, and each site lives at jlt-commons.github.io/<repo>/. The rest are recent enough that their documentation is still the repo README. More about how they got here.

The organization also keeps some shared tooling. setup-jolt installs Jolt on a GitHub Actions runner, and ci-builds builds the whole fleet against a single Jolt version so a breaking release shows up the day it ships.

awesome-jolt catalogs the wider ecosystem beyond this organization's own projects: jolt-lang's own libraries, JVM and Clojure compatibility, docs and tooling.