composable-rust

Expert knowledge for testing Composable Rust applications. Use when writing unit tests for reducers, setting up integration tests with real dependencies, using test utilities (TestStore, FixedClock, mocks), working with testcontainers for PostgreSQL/Redpanda, property-based testing, or questions about testing patterns and best practices.

Expert knowledge for building event-driven systems with Composable Rust framework. Use when implementing reducers, designing state machines, working with effects, creating environment traits for dependency injection, building stores, or answering questions about core architectural patterns and the unidirectional data flow model.

Expert knowledge for building web APIs and real-time applications with Composable Rust. Use when building HTTP REST APIs with Axum, implementing WebSocket for real-time updates, working with authentication (magic link, OAuth, passkeys), setting up email providers (SMTP, Console), designing API routes or request handlers, or questions about web integration and real-time communication.

Expert knowledge for implementing distributed sagas in Composable Rust. Use when coordinating multiple aggregates in distributed transactions, implementing compensation logic or rollback flows, working with EventBus trait or Redpanda integration, designing saga state machines, or questions about eventual consistency and distributed transaction patterns.

Expert knowledge for implementing event sourcing in Composable Rust. Use when implementing event-sourced aggregates, working with EventStore trait or PostgreSQL, designing event schemas, implementing state reconstruction, dealing with optimistic concurrency and version tracking, or questions about event sourcing, CQRS, and persistence patterns.

Expert knowledge for deploying and operating Composable Rust applications in production. Use when setting up database migrations, configuring connection pools, implementing backup/restore procedures, tuning performance, setting up monitoring and observability, or handling operational concerns like disaster recovery and production database management.

Expert knowledge for writing cutting-edge, idiomatic Rust code with Rust Edition 2024, strict clippy compliance, and functional-but-pragmatic philosophy. Use when writing any Rust code, fixing clippy warnings, structuring modules or crates, reviewing or refactoring Rust code, or questions about Rust 2024 features, async patterns, documentation standards, or performance optimization.