Epsilon is a Common Lisp module and build system for SBCL.

Epsilon ships a module declaration system, a runtime, a content-addressed build, and a compact standard library sufficient to load further modules.

./epsilon repl
epsilon> (+ 1 2 3)
6

See epsilon commands for a list of commands.

The standard library provides HAMT-backed persistent maps/sets, HTTP, JSON, SQL, MessagePack, WebSocket, regex, time, UUID, base64, compression, TLS/X.509, an FFI with libclang-driven binding generation, an sb-fiber M:N coroutine scheduler, and a content-addressed build pool.

• docs/MODULE.md — manifest reference and module conventions
• demos/ — worked examples
• CHANGELOG.md — release notes

MIT — see LICENSE.