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+CLAUDE.md
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+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+ZPan is a self-hosted cloud disk server written in Go that enables direct client-to-cloud-storage connections, bypassing server bandwidth limitations. It supports all S3-compatible storage providers (AWS S3, Aliyun OSS, Tencent COS, MinIO, etc.).
+
+## Build Commands
+
+```bash
+make mod              # Download dependencies
+make lint             # Run golangci-lint (excludes errcheck)
+make test             # Run tests with coverage
+make build            # Build binary to build/bin/zpan
+make swag             # Generate Swagger API documentation
+make coverage-html    # Generate HTML coverage report
+```
+
+## Running the Server
+
+```bash
+./build/bin/zpan server                           # Default config at /etc/zpan/config.yml
+./build/bin/zpan server --config ./config.yml     # Custom config path
+./build/bin/zpan server --port 8222               # Custom port
+```
+
+## Quick Local Development
+
+Use the docker-compose in `quickstart/` to spin up MinIO + ZPan:
+```bash
+docker-compose -f quickstart/docker-compose.yaml up
+```
+
+## Architecture
+
+The project follows Clean Architecture with Google Wire for dependency injection:
+
+```
+cmd/                    # Cobra CLI commands (server, version)
+internal/
+├── app/
+│   ├── api/            # HTTP handlers with Gin, Swagger annotations
+│   ├── usecase/        # Business logic
+│   │   ├── vfs/        # Virtual filesystem operations
+│   │   ├── storage/    # Cloud storage management
+│   │   ├── uploader/   # File upload handling
+│   │   └── authz/      # Authorization logic
+│   ├── repo/           # Repository layer (data access abstraction)
+│   ├── dao/            # Database access objects
+│   ├── entity/         # GORM database models
+│   ├── model/          # DTOs
+│   ├── docs/           # Generated Swagger docs
+│   └── wire.go         # DI wiring
+├── pkg/
+│   ├── middleware/     # Auth, RBAC, installer middleware
+│   ├── authed/         # Authentication utilities
+│   └── provider/       # Cloud storage providers
+└── mock/               # Mock implementations for testing
+pkg/nos/                # NetEase Object Storage SDK (public)
+web/                    # Embedded frontend assets
+```
+
+## Key Technologies
+
+- **Web Framework**: Gin
+- **ORM**: GORM (supports SQLite, MySQL, PostgreSQL, SQL Server)
+- **DI**: Google Wire
+- **Auth**: JWT + OAuth2, Open Policy Agent for RBAC
+- **API Docs**: swaggo/swag (annotations in `internal/app/api/router.go`)
+- **CLI**: Cobra + Viper for config
+
+## Database
+
+Supports multiple drivers via GORM. Default is SQLite. Configure via DSN in config file:
+- SQLite: `zpan.db`
+- MySQL: `user:password@tcp(127.0.0.1:3306)/zpan?parseTime=true`
+- PostgreSQL: `postgres://user:pass@localhost:5432/zpan`
+
+## API Documentation
+
+Swagger annotations are in `internal/app/api/router.go`. Regenerate with `make swag`. Access at `/swagger/` endpoint when server is running.
+
+## Testing
+
+Tests use testify for assertions and go-sqlmock for database mocking. Mock implementations are in `internal/mock/`.
+
+```bash
+make test                    # Run all tests
+go test ./internal/app/...   # Run specific package tests
+go test -run TestName ./...  # Run single test
+```
+
+## Commit Convention
+
+Use Conventional Commits format (feat:, fix:, docs:, etc.). PRs should target the master branch.