cratis

Runnable event sourcing and CQRS samples for the Cratis stack — Chronicle, Arc, Components, CLI, and Workbench.

Edge authentication and tenant-resolution proxy for Cratis Arc applications — OIDC/OAuth2/JWT, multi-provider, invite and lobby onboarding (YARP, .NET).

The shared building blocks beneath the Cratis stack — concepts, serialization, dependency injection, and type discovery for .NET and TypeScript.

Free, MIT-licensed AI skills, rules, and agent guidance for building event-sourced and CQRS applications with the Cratis ecosystem (preview).

Event sourcing for Kotlin and Java — the idiomatic JVM client for Cratis Chronicle, with a Spring Boot starter (io.cratis:chronicle on Maven Central).

Event sourcing for TypeScript and Node.js — the idiomatic client for Cratis Chronicle (@cratis/chronicle on npm).

Specification by Example (BDD) for .NET — Given/When/Then specs with xUnit and NUnit, in the style of Machine.Specifications.

Experimental assisted discovery — capture existing system behavior (SQL Server CDC, Postgres logical replication, HTTP, OTLP) into event models for the Cratis model-first layer.

The Cratis release action that handles semantic versioning and release metadata used by all Cratis publish pipelines.

VS Code extension for browsing Cratis Chronicle event stores — streams, namespaces, schemas, observers, and projections.

Source for cratis.no — the Cratis company site: an open-source (MIT) event sourcing platform for .NET and beyond.

React component library for CQRS and event-sourced applications built with Cratis Arc — command dialogs, typed forms, and query-backed data tables.

Arc for Kotlin and Java applications hosted by Spring Boot

Framework-neutral source adapter SDK for generating Cratis Screenplay definitions

Experimental platform-neutral UI model for Screenplay-driven applications — describing a user interface without describing a platform.

MCP server for Cratis Chronicle — connect AI agents to a running event-sourcing database to inspect events, observers, projections, and jobs.

Source for cratis.io — documentation for the Cratis ecosystem: Chronicle event sourcing, Arc CQRS, Components, CLI, Workbench, and the model-first layer.

Experimental renderer that turns Screenplay event models into reviewable Cratis Arc + Chronicle applications.

The Cratis community's documentation assistant on Discord — grounded in the docs at cratis.io, allergic to making things up