Go Pro Max - Backend Generator

When User Requests Go Work

Follow this workflow for every Go-related task:

1. Analyze Requirements

Extract from the user's request:

• Project type: REST API, CLI, microservice, library, serverless
• Domain: web, database, gRPC, messaging
• Constraints: stdlib only? specific framework? Kubernetes?
• Scale: small project, enterprise, library

Default Stack (always use unless user specifies otherwise)

Component	Default	Package
Database	PostgreSQL	github.com/lib/pq
Router	Chi v5	github.com/go-chi/chi/v5
Auth	JWT	github.com/golang-jwt/jwt/v5
Query	database/sql	stdlib
Migration	Raw SQL files	migrations/*.sql
Config	ENV vars	os.LookupEnv
Deploy	Docker Compose	Dockerfile + docker-compose.yml

Project structure: Domain-driven layout:

cmd/api/main.go
internal/config/       — env config
internal/domain/       — structs + request types
internal/handler/      — HTTP handlers (Chi)
internal/service/      — business logic
internal/repository/   — PostgreSQL queries
internal/middleware/    — auth, cors, logger
migrations/            — SQL migration files

2. Generate Architecture System (REQUIRED for new projects)

python3 skills/go/scripts/search.py "<project description>" --arch-system -p "ProjectName"

This gives you: architecture, packages, error strategy, patterns, structure, testing approach.

3. Supplement with Domain Searches

Based on the project needs, search relevant domains:

# Patterns for the task
python3 skills/go/scripts/search.py "functional options config" --domain pattern

# Error handling approach
python3 skills/go/scripts/search.py "error wrapping context" --domain error

# Concurrency patterns
python3 skills/go/scripts/search.py "worker pool bounded" --domain concurrency

# Performance tips
python3 skills/go/scripts/search.py "http connection pooling" --domain perf

# Testing patterns
python3 skills/go/scripts/search.py "table driven httptest" --domain test

4. Stack Guidelines

If using a specific framework/stack:

python3 skills/go/scripts/search.py "middleware authentication" --stack web-gin
python3 skills/go/scripts/search.py "cobra subcommands config" --stack cli
python3 skills/go/scripts/search.py "interceptor logging" --stack grpc

5. Implement

Apply all recommendations from the search results:

• Use recommended architecture and project structure
• Apply patterns (Functional Options, Repository Interface, etc.)
• Follow error handling strategy
• Implement proper concurrency patterns
• Add tests following testing strategy

6. Always Generate Docker Files

Every project MUST include these files:

Dockerfile (multi-stage build):

FROM golang:1.22-alpine AS builder
WORKDIR /app
COPY go.mod go.sum ./
RUN go mod download
COPY . .
RUN CGO_ENABLED=0 GOOS=linux go build -o /bin/api ./cmd/api

FROM alpine:3.20
RUN apk add --no-cache ca-certificates tzdata
COPY --from=builder /bin/api /bin/api
COPY migrations/ /app/migrations/
EXPOSE 8080
CMD ["/bin/api"]

docker-compose.yml (API + PostgreSQL):

services:
  api:
    build: .
    ports:
      - "8080:8080"
    environment:
      - DATABASE_URL=postgres://postgres:postgres@db:5432/appdb?sslmode=disable
      - JWT_SECRET=change-me
      - PORT=8080
    depends_on:
      db:
        condition: service_healthy
  db:
    image: postgres:16-alpine
    ports:
      - "5432:5432"
    environment:
      POSTGRES_DB: appdb
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: postgres
    volumes:
      - pgdata:/var/lib/postgresql/data
      - ./migrations:/docker-entrypoint-initdb.d
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U postgres"]
      interval: 5s
      timeout: 5s
      retries: 5
volumes:
  pgdata:

Makefile (must include):

dev:
	go run ./cmd/api
build:
	go build -o bin/api ./cmd/api
test:
	go test -race -cover ./...
docker-up:
	docker-compose up -d --build
docker-down:
	docker-compose down

Pre-Delivery Checklist

Before delivering Go code, verify:

• go vet ./... passes
• golangci-lint run passes
• go test -race ./... passes
• No goroutine leaks (all goroutines have shutdown path)
• All errors handled (no _ = f())
• Context propagated through all layers
• http.Response.Body closed with defer
• Exported types have doc comments
• No global mutable state
• Interfaces defined at consumer, not provider
• Struct fields ordered for alignment (largest to smallest)
• strings.Builder used instead of + concatenation in loops
• Database connections properly pooled and closed
• Graceful shutdown implemented for servers

Quick Domain Reference

Domain	When to Search
pattern	Need a design pattern (options, factory, middleware, pipeline)
package	Choosing a library/package for a use case
error	Error handling strategy, wrapping, custom errors
perf	Performance optimization, profiling, allocation
test	Testing approach, mocking, benchmarks
concurrency	Goroutines, channels, sync primitives
interface	Interface design, composition, contracts
arch	Project structure, architecture decisions
idiom	Go conventions, naming, style
anti	Avoiding common mistakes
tooling	Go tools, linting, profiling
module	Go modules, versioning, dependencies

Resources

• scripts/: BM25 search engine, architecture system generator
• data/: 12 domains and 10 stacks with 300+ curated Go entries