golang-web

# Go Web Architecture ## Core Principles - **Standard layout** — Follow cmd/internal/pkg convention - **Explicit dependencies** — Wire dependencies in main.go, no globals - **Interface-driven** — Define interfaces where you use them, not where you implement - **Error wrapping** — Wrap errors with context, use error codes - **No backwards compatibility** — Delete, don't deprecate. Change directly - **LiteLLM for LLM APIs** — Use LiteLLM proxy for all LLM integrations --- ## No Backwards Compatibility > **Delete unused code. Change directly. No compatibility layers.** ```go // ❌ BAD: Deprecated function kept around // Deprecated: Use NewUserService instead func CreateUserService() *UserService { ... } // ❌ BAD: Alias for renamed types type OldName = NewName // "for backwards compatibility" // ❌ BAD: Unused parameters func Process(_ context.Context, data Data) { ... } // ✅ GOOD: Just delete and update all usages func NewUserService(repo UserRepository) *UserService { ... } ``` --- ## LiteLLM for LLM APIs > **Use LiteLLM proxy. Don't call provider APIs directly.** ```go // adapters/llm/client.go package llm import ( "github.com/sashabaranov/go-openai" ) // Connect to LiteLLM proxy using OpenAI-compatible SDK func NewClient(cfg Config) *openai.Client { config := openai.DefaultConfig(cfg.APIKey) config.BaseURL = cfg.BaseURL // LiteLLM proxy URL return openai.NewClientWithConfig(config) } ``` --- ## Quick Start ### 1. Initialize Project ```bash mkd...