go-zero is a full-stack Go microservices framework with an integrated code generation toolchain (goctl). In production, it provides a production-grade HTTP/REST server (rest/) with a middleware chain for authentication, tracing, rate limiting, circuit breaking, and load shedding; a gRPC server/client framework (zrpc/) with interceptors for observability, auth, and timeout; an API gateway (gateway/) that translates HTTP requests to gRPC; and a CLI tool (goctl) that generates Go, TypeScript, Dart, Java, and Swagger code from API definitions, SQL schemas, and protobuf files. The core library (core/) delivers building blocks: configuration loading (YAML/JSON/TOML), structured logging with rotation, Prometheus metrics, OpenTelemetry tracing, circuit breaker (Google SRE algorithm), adaptive load shedding, rate limiting (token bucket, period limit), distributed caching (Redis, in-memory), SQL/NoSQL data access with caching, service discovery (etcd, Kubernetes), concurrency primitives (singleflight, mapreduce, stream processing), and data structures (rolling window, timing wheel, safe map). The architecture is modular, with each package providing clean interfaces and option patterns. The codebase is well-tested, actively maintained, and demonstrates strong engineering craftsmanship.