# Getting started > Install effect-cqrs, or clone the repository to run its examples. ## Install * pnpm ```bash pnpm add effect-cqrs effect ``` * npm ```bash npm install effect-cqrs effect ``` * yarn ```bash yarn add effect-cqrs effect ``` * bun ```bash bun add effect-cqrs effect ``` It needs Node 24 or later and Effect 4. To store events in SQLite or PostgreSQL, add that database’s `effect/sql` driver too: * pnpm ```bash pnpm add @effect/sql-sqlite-node pnpm add @effect/sql-pg ``` * npm ```bash npm install @effect/sql-sqlite-node npm install @effect/sql-pg ``` * yarn ```bash yarn add @effect/sql-sqlite-node yarn add @effect/sql-pg ``` * bun ```bash bun add @effect/sql-sqlite-node bun add @effect/sql-pg ``` Everything is exported from `effect-cqrs`, and each module also has its own path, such as `effect-cqrs/ViewModel`. ## Try the examples The examples live in the repository, where they import the TypeScript sources directly. 1. Clone the repository and install the dependencies. It needs pnpm. ```bash git clone https://github.com/davidnussio/effect-cqrs.git cd effect-cqrs pnpm install ``` 2. Run the tests. ```bash pnpm test ``` 3. Run the [tutorial](https://effect-cqrs.dambox.ch/tutorial/shop/)’s shop, which uses every feature in one file. ```bash pnpm tutorial ``` 4. Run the todo example. It is the moleculer-cqrs README walkthrough as a program, on an in-memory SQLite database. ```bash pnpm example ``` 5. Serve the bank demo at . ```bash pnpm ui ``` 6. Serve the tutorial’s shop, with its traces, saga and stored rows. ```bash pnpm ui:shop ``` ## What’s where * src/ * Aggregate.ts defines aggregates * AggregateService.ts runs commands and reads state and history * ViewModel.ts projects events into read models * Checkpoints.ts remembers how far each view model has read * EventStore.ts the log, and the store in memory * SqliteEventStore.ts * PostgresEventStore.ts * Fixture.ts tests an aggregate in isolation * examples/ * tutorial/ the shop of the tutorial * … * todo/ the moleculer-cqrs walkthrough * … * bank-ui/ the bank demo, in the browser * … * shop-ui/ the tutorial’s shop, in the browser * … * workshop/ a bank and a shop on a server, for a room * … * bench/ performance and stress tests, and their report * … * test/ * … ## Next steps [Follow the tutorial](https://effect-cqrs.dambox.ch/tutorial/shop/) [Define an aggregate](https://effect-cqrs.dambox.ch/guides/aggregates/) [Walk through the bank](https://effect-cqrs.dambox.ch/tutorial/bank/) [Use it with a coding agent](https://effect-cqrs.dambox.ch/using-with-ai/)