Jolt examples

Sample projects for Jolt, running on the Chez Scheme substrate. Each project has a deps.edn; run them with the jolt binary, e.g. jolt run -m app.core or jolt -M:alias.

Dependencies are pulled straight from their git repos (no Maven) into a cache at ~/.jolt/gitlibs. The HTTP client, HTTP server, SQLite and PNG output are built into jolt over the system's native libraries (curl, BSD sockets, libsqlite3) via Chez's FFI.

• commonmark-app — a dependency-free Markdown → HTML renderer in pure Clojure (no JVM, no deps). A self-contained CommonMark subset; building it surfaced several jolt fixes. jolt run -m app.core, jolt test.
• hiccup-app — renders HTML from Clojure data with weavejester/hiccup, pulled from git.
• markdown-app — Markdown → HTML with yogthos/markdown-clj from git.
• ray-tracer — jank's ray tracer benchmark ported to jolt (all-maps vs typed-record variants), a compute benchmark. jolt -M:baseline N.
• ray-tracer-multi — the typed ray tracer across five namespaces; renders a PNG with the built-in jolt.png. jolt -M:run render.
• http-client-app — jolt's built-in HTTP client (jolt.http-client, over the system curl) against real HTTPS endpoints: TLS, redirects, gzip, query params, JSON POST.
• ring-app — a guestbook web app on the real JVM-style stack: ring-core middleware + reitit routing + Selmer templates + honeysql + yogthos/ config (all from git, run unchanged) on jolt's built-in HTTP server (BSD sockets via FFI) with a SQLite guestbook (jolt's built-in jdbc.core/libsqlite3). jolt run, jolt -M:test.
• malli-app — metosin/malli schema validation, pulled from git. m/validate/m/explain across the schema vocabulary (predicates, :map, :vector, :enum, bounded :int, …).
• nrepl-example — a jolt app that starts an nREPL server and parks, so you can connect an editor and drive the live process (inspect state, mutate it, reload code). The shape of a binary deployed to, say, a Raspberry Pi that you reach into over nREPL. Runs interpreted or compiled to a standalone binary. jolt run -m app.core, jolt build -m app.core -o nrepl-example.