A small Cratis library slice based on the MongoDB choice of dotnet new cratis. Authors/ keeps the event-source identity, command and event, observable read model, and React screen together. The rest of the generated host is in Program.cs, App.tsx, and .frontend/. The Samples repository pins .NET dependencies in Directory.Packages.props and frontend dependencies in this sample's package-lock.json. This README is deliberately short because the full-stack capstone walks through these exact files. The docs: regions in these files supply the C# backend tabs in Cratis/Arc and the shared React code on cratis.io/build-a-full-app. Cratis/Documentation CI checks both against this sample; update the tabs and page alongside any region changes.

Prerequisites: .NET 10 SDK, Node.js 23 or newer, npm, Docker with Compose. From this directory:

docker compose up -d
dotnet build Capstone.csproj --configuration Debug
npm ci
npm run build

The Debug build generates Authors/RegisterAuthor.ts, Authors/Author.ts, and Authors/index.ts from the C# slice; do not edit the proxies. In separate terminals, run dotnet run --no-launch-profile and npm run dev, then visit http://localhost:9000. Click Add author, enter a name, and submit it. The new name should appear in the list after Chronicle processes AuthorRegistered into the MongoDB read model. The template's Chronicle and MongoDB development settings are in appsettings.json.

To start over with empty local sample data, stop the app and run docker compose down -v from this directory. This deletes the Compose project's container data; do not run it against other projects. The template's development credentials and exposed ports are not production settings. This sample does not model other library operations, authentication, or deployment. The CI build checks compilation and proxy generation, not a live Chronicle/MongoDB interaction.