# Jzero Skills > Comprehensive knowledge base for jzero framework (enhanced go-zero). Use this skill when working with jzero to understand correct patterns for REST APIs (Handler/Logic/Context architecture), RPC services (service discovery, load balancing), Gateway services, database operations (sqlx, MongoDB, caching), resilience patterns (circuit breaker, rate limiting), and jzero-specific features (git-change-based generation, flexible configuration, custom templates). Essential for generating production-ready jzero code that follows framework conventions. Use when this capability is needed. - Skill: `tomevault-io/jzero-skills` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/jzero-skills` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/jzero-skills/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Product & Planning - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/jzero-skills --- # jzero Skills for AI Agents Structured knowledge base optimized for AI agents to help developers work effectively with the [jzero](https://github.com/jzero-io/jzero) framework (enhanced go-zero). ## Overview This skill provides AI agents with comprehensive jzero knowledge to: - Generate accurate code following jzero conventions - Understand the three-layer architecture (Handler → Logic → Model) - Apply best practices for microservices development - Use jzero-specific features - Build production-ready applications ## Quick Start When helping with jzero development: 1. **For new projects**: Start with [Development Workflows](#development-workflows) 2. **For REST APIs**: Check [REST API File Structure](references/rest-api-patterns/api-file-structure.md) - ⚠️ Critical rules 3. **For RPC services**: Review [Proto File Structure](references/rpc-patterns/proto-file-structure.md) - Proto standards & multi-proto support 4. **For databases**: Review [Database Best Practices](references/database-patterns/best-practices.md) - ⚠️ Must read 5. **For SQL changes**: Check [SQL Migration Guide](references/database-patterns/sql-migration.md) - ⚠️ Schema changes 6. **For specific operations**: Reference the appropriate pattern guide below ## Core Patterns ### REST API Development **Reference**: [references/rest-api-patterns/api-file-structure.md](references/rest-api-patterns/api-file-structure.md) - API file structure with required settings (`go_package`, `group`, `compact_handler`) - Three-layer architecture (Handler → Logic → Model) - Request/response type definitions with validation - Handler patterns and HTTP concerns - Logic patterns and business implementation - ✅ Correct vs ❌ incorrect patterns with examples **When to use**: Creating or modifying REST API services, implementing HTTP endpoints ### RPC Services - **[Proto File Structure](references/rpc-patterns/proto-file-structure.md)**: Proto standards, multi-proto support, file structure, HTTP gateway, OpenAPI docs - **[Proto Field Validation](references/rpc-patterns/proto-validation.md)**: Field validation with protovalidate, CEL expressions, built-in constraints - **[Proto Middleware](references/rpc-patterns/proto-middleware.md)**: HTTP/RPC middleware at service and method levels **When to use**: Creating or modifying RPC services, working with proto files, adding validation or middleware ### Database Operations - **[Best Practices](references/database-patterns/best-practices.md)**: Model import rules, condition chain usage, error handling, field constants ⚠️🚨 - **[SQL Migration Guide](references/database-patterns/sql-migration.md)**: Managing schema changes with up/down migrations ⚠️ - **[Model Generation](references/database-patterns/model-generation.md)**: From SQL files or remote datasource - **[Database Connection](references/database-patterns/database-connection.md)**: MySQL, PostgreSQL, SQLite, Redis configuration - **[CRUD Operations](references/database-patterns/crud-operations.md)**: Generated methods (Insert, FindOne, Update, Delete, etc.) **⚠️ CRITICAL REMINDER**: ALWAYS use `condition.NewChain()` - NEVER use `condition.New()` **When to use**: Implementing data persistence, queries, or database operations ### Development Workflows **Reference**: [Project Structure](#project-structure) #### Creating a New REST API Endpoint 1. **Define API specification** in `.api` file with required settings: 2. **Generate api code**: `jzero gen --desc desc/api/user.api` 3. **Implement logic** in `internal/logic/` following three-layer architecture See detailed patterns: [REST API File Structure](references/rest-api-patterns/api-file-structure.md) #### Implementing Database Operations **Choose your schema mode first:** **Local SQL Mode** (schema files in `desc/sql/`): 1. **Create/update SQL schema** in `desc/sql/*.sql` 2. **Create migration files** in `desc/sql_migration/` (xx.up.sql & xx.down.sql) ⚠️ 3. **Apply migrations** (development: `jzero migrate up`, production: auto in `cmd/server.go`) 4. **Generate model**: `jzero gen --desc desc/sql/users.sql` **Remote Datasource Mode** (schema from live database): 1. **Create migration files** in `desc/sql_migration/` (xx.up.sql & xx.down.sql) ⚠️ 2. **Apply migrations** (development: `jzero migrate up`, production: auto in `cmd/server.go`) 3. **Generate model**: `jzero gen` **Common steps (both modes)**: - Inject model into ServiceContext - Use condition builder in logic layer - Handle errors properly ⚠️ **Migration rules**: Always create both up/down files, use consecutive numbering (1, 2, 3...) See detailed patterns: [SQL Migration Guide](references/database-patterns/sql-migration.md) | [Database Best Practices](references/database-patterns/best-practices.md) #### Setting Up Database Connection 1. **Configure in `etc/etc.yaml`**: 2. **Initialize in ServiceContext** with modelx.MustNewConn 3. **Register models** in Model struct See detailed guide: [Database Connection](references/database-patterns/database-connection.md) ## Project Structure ``` jzero-skills/ ├── SKILL.md # This file - skill entry point ├── references/ # Detailed pattern documentation │ ├── rest-api-patterns/ # REST API guides │ │ └── api-file-structure.md # ⚠️ Critical rules for .api files │ ├── rpc-patterns/ # RPC/Proto service guides │ │ ├── proto-file-structure.md # Proto standards & multi-proto │ │ ├── proto-validation.md # Field validation guide │ │ └── proto-middleware.md # Middleware patterns │ └── database-patterns/ # Database operation guides │ ├── best-practices.md # ⚠️ Critical rules with examples │ ├── sql-migration.md # ⚠️ Schema changes & migrations │ ├── database-connection.md # DB & Redis setup │ ├── model-generation.md # Generate models from SQL │ └── crud-operations.md # CRUD methods reference ``` **Typical jzero project structure**: ``` myproject/ ├── .jzero.yaml # CLI config: code generation, ⚠️ migrate settings ├── desc/ │ ├── api/ # .api files → generates handlers │ ├── sql/ # .sql files → generates models (local SQL mode) │ ├── sql_migration/ # xx.up.sql & xx.down.sql for schema changes ⚠️ │ └── proto/ # .proto files → generates RPC code ├── internal/ │ ├── handler/ # HTTP handlers (generated) │ ├── logic/ # Business logic (implement here) │ ├── model/ # Data models (generated) │ ├── svc/ # Service context (dependencies) │ ├── config/ # Config structs │ └── middleware/ # Custom middleware ├── etc/ │ └── etc.yaml # Configuration └── .jzero.yaml # jzero CLI config ``` ## Key Principles ### ✅ Always Follow - **🚨 Condition builder**: ALWAYS use `condition.NewChain()`, NEVER use `condition.New()` - **THIS IS CRITICAL** 🚨 - **Three-layer architecture**: Handler → Logic → Model separation - **API file requirements**: Set `go_package`, `group`, `compact_handler: true` - **Model imports**: Use alias `xxmodel "project/internal/model/xx"` - **Error handling**: Use `errors.Is(err, model.ErrNotFound)` from `github.com/pkg/errors` - **Code generation**: Run `jzero gen --desc` before implementing logic - **Type safety**: Use generated field constants (e.g., `usersmodel.Id`) ### ❌ Never Do - 🚫 **NEVER use `condition.New()`** - This is error-prone and deprecated. **ALWAYS use `condition.NewChain()`** - Put business logic in handlers (belongs in logic layer) - Skip `go_package`, `group`, or `compact_handler` in `.api` files - Import models without alias: `"project/internal/model/users"` (wrong) - Use `==` for error comparison: `if err == ErrNotFound` (wrong) - Hard-code configuration values - Implement logic before generating code ## Progressive Learning **New to jzero?** 1. Read this file (SKILL.md) for overview 2. Create a project: `jzero new myapi --frame api` 3. Follow [Development Workflows](#development-workflows) 4. Study [REST API File Structure](references/rest-api-patterns/api-file-structure.md) **Building REST APIs?** 1. Master API file requirements (critical for avoiding regeneration issues) 2. Learn three-layer architecture patterns 3. Study [Database Best Practices](references/database-patterns/best-practices.md) **Creating RPC services?** 1. Learn proto file structure: [Proto File Structure](references/rpc-patterns/proto-file-structure.md) 2. Add validation: [Proto Field Validation](references/rpc-patterns/proto-validation.md) 3. Implement middleware: [Proto Middleware](references/rpc-patterns/proto-middleware.md) **Working with databases?** 1. ⚠️ **Must read**: [Database Best Practices](references/database-patterns/best-practices.md) 2. ⚠️ **Must read**: [SQL Migration Guide](references/database-patterns/sql-migration.md) - Schema changes 3. Set up connection: [Database Connection](references/database-patterns/database-connection.md) 4. Generate models: [Model Generation](references/database-patterns/model-generation.md) 5. Learn CRUD operations: [CRUD Operations](references/database-patterns/crud-operations.md) **Production deployment?** 1. Review all best practices in reference guides 2. Configure proper error handling and logging 3. Set up caching strategies with Redis 4. Implement resilience patterns (circuit breaker, rate limiting) ## Resources - **Official documentation**: [docs.jzero.io](https://docs.jzero.io) - **GitHub repository**: [jzero-io/jzero](https://github.com/jzero-io/jzero) - **Examples**: [jzero-io/examples](https://github.com/jzero-io/examples) - **Base framework**: [zeromicro/go-zero](https://github.com/zeromicro/go-zero) --- > Source: [jzero-io/jzero](https://github.com/jzero-io/jzero) — distributed by [TomeVault](https://tomevault.io).