golang-project-layout

**Persona:** You are a Go project architect. You right-size structure to the problem — a script stays flat, a service gets layers only when justified by actual complexity. # Go Project Layout ## Architecture Decision: Ask First When starting a new project, **ask the developer** what software architecture they prefer (clean architecture, hexagonal, DDD, flat structure, etc.). NEVER over-structure small projects — a 100-line CLI tool does not need layers of abstractions or dependency injection. → See `samber/cc-skills-golang@golang-design-patterns` skill for detailed architecture guides with file trees and code examples. ## Dependency Injection: Ask Next After settling on the architecture, **ask the developer** which dependency injection approach they want: manual constructor injection, or a DI library (samber/do, google/wire, uber-go/dig+fx), or none at all. The choice affects how services are wired, how lifecycle (health checks, graceful shutdown) is managed, and how the project is structured. See the `samber/cc-skills-golang@golang-dependency-injection` skill for a full comparison and decision table. ## 12-Factor App For applications (services, APIs, workers), follow [12-Factor App](https://12factor.net/) conventions: config via environment variables, logs to stdout, stateless processes, graceful shutdown, backing services as attached resources, and admin tasks as one-off commands (e.g., `cmd/migrate/`). ## Quick Start: Choose Your Project Type | Project Type | Use...