Axum

Axum for production Rust HTTP APIs on Tokio across two projects. On NotNull Online: REST and Server-Sent Events (SSE) for streaming RAG chat, middleware (auth cookies, rate limits), thin handlers as the driving adapter over Hexagonal application services, and composition-root wiring in AppState. On Gorgeous Orchids: Rust/Axum backend API without Hexagonal Architecture. Shared focus areas include typed extractors, layered routing, and async request handling; Hexagonal ports-and-adapters composition applies only to NotNull Online.