Essays and engineering notes on event sourcing, CQRS, and building the open-source Cratis stack.
Run Chronicle locally in one container, append your first events from a plain .NET console app, and watch them become read models — every command in this post was executed against the exact versions it names.
Chronicle's kernel sits behind a language-agnostic gRPC/protobuf boundary — 22 canonical .proto contracts that any language can implement. Here's how the contract is layered, how the existing clients are built on it, and what a new client implements.
Most event sourcing comparisons reduce to popularity. We compiled a version-pinned, source-cited comparison of KurrentDB, Marten, and Cratis Chronicle instead — every row reproducible from public documentation, with the same rules applied to our own product. Here's how to use it.
What Cratis is, what Chronicle covers, and how Arc, Components, the CLI, Workbench, and the experimental model-first layer fit together — all open source and MIT licensed.
