coss.com is the new holding company of cal.com, the pioneers of open source scheduling infrastructure and cal.com continues to be the 'google search' of our alphabet.

Minimal TypeScript state machine library with compile-time safety through Type-State Programming where states are types, not strings.

Session persistence for terminal processes

A static page generator for repos

Linux virtual machines, with a focus on running containers

Attempt at ergonomic effect/Schema compiler

Memoize Effect computations with React’s cache: argument-aware, concurrent-safe, typed.

Learning how to make music (music production) in the browser (with Strudel) for total beginners

Browser Navigation for Effect

Common ID format generation for Effect

Effect Schema-based templating

A Higher-Kinded-Types encoding for TypeScript w/ Composable Typeclasses

Type-safe, bi-directional, routing for Effect

StyleX is the styling system for ambitious user interfaces.

Server actions but concurrent, POST/GET, with stable URL

Poverty version of Superwhisper on linux

A minimal, fast, database client desktop application. Built for developers who want to quickly peek at their data without the bloat.

Infrastructure as data

The Cloud Native Control Plane

@effect/schema based Cedar schema DSL

Implementation of the Cedar Policy Language

effect/Schema Avro codec

🍃 A micro HKT (higher-kinded type) implementation for TypeScript, with type safety elegantly guaranteed.

Simple media server written with Bun and Effect

🔌 Everything you need to know to create offline-first web apps.

Compilers for @effect/schema

Collection of types for @effect/schema