gohorsejobs/docs/AGENTS.md

# AGENTS.md - GoHorse Jobs

> **Last Updated:** 2026-02-18
> **Purpose:** Context for AI coding assistants (Claude, Cursor, etc.)

---

## Project Overview

GoHorse Jobs is a B2B SaaS recruitment platform connecting companies with candidates. It is structured as a monorepo with multiple services sharing a single PostgreSQL database.

**Business model**: Freemium (Free / Pro R$199/month / Enterprise custom pricing).

---

## Repository Structure

```
gohorsejobs/
├── backend/              # Go 1.24 REST API (Clean Architecture + DDD)
├── frontend/             # Next.js 15 web application (App Router)
├── backoffice/           # NestJS 11 admin/worker API (Fastify adapter)
├── seeder-api/           # Node.js Express database seeder
├── job-scraper-multisite/# Job scraping service
├── k8s/                  # Kubernetes manifests (dev, hml, prd)
├── docs/                 # Central documentation
├── .forgejo/             # Forgejo CI/CD workflows
├── .drone.yml            # Drone CI/CD pipelines
└── start.sh              # Interactive dev startup script
```

---

## Tech Stack

| Service | Language | Framework | Key Libraries |
|---------|----------|-----------|---------------|
| Backend | Go 1.24 | stdlib net/http | JWT v5, lib/pq, GORM, Stripe, AWS SDK v2, RabbitMQ, Firebase Admin, Swaggo |
| Frontend | TypeScript 5 | Next.js 15 (App Router) | React 19, Tailwind CSS 4, shadcn/ui, Zustand, React Hook Form + Zod, Framer Motion |
| Backoffice | TypeScript 5 | NestJS 11 (Fastify) | TypeORM, Passport + JWT, Stripe, AMQP, Nodemailer, Pino, Firebase Admin |
| Seeder | JavaScript (ESM) | Express 5 | pg, bcrypt |

**Database**: PostgreSQL 16+ with UUID v7 primary keys. 43+ SQL migration files in `backend/migrations/`.

---

## Quick Start

```bash
./start.sh   # Interactive menu
```

| Option | Action |
|--------|--------|
| 1 | Start Frontend + Backend |
| 2 | Reset DB + Seed + Start |
| 3 | Start all services (Frontend + Backend + Backoffice) |
| 4 | Run migrations only |
| 5 | Seed database (append) |
| 6 | Full DB reset + migrate + seed |
| 7 | Run backend E2E tests |
| 8 | Seed reset LITE (skip 153k cities) |
| 9 | Run all tests (Backend + Frontend) |

### Service Ports

| Service | Port |
|---------|------|
| Backend | 8521 |
| Frontend | 8963 |
| Backoffice | 3001 |
| Swagger (Backend) | 8521/swagger/index.html |
| Swagger (Backoffice) | 3001/api/docs |

---

## Build & Test Commands

### Backend (Go)

```bash
cd backend && go run cmd/api/main.go              # Run
go test -v ./... -count=1                         # All unit tests
go test -tags=e2e -v ./tests/e2e/...              # E2E tests
swag init -g cmd/api/main.go --parseDependency --parseInternal  # Swagger
go mod tidy                                       # Dependencies
```

### Frontend (Next.js)

```bash
cd frontend
npm install          # Install deps
npm run dev          # Dev server (use -p 8963 for project convention)
npm run build        # Production build
npm run lint         # ESLint
npm run test         # Jest unit tests
```

### Backoffice (NestJS)

```bash
cd backoffice
pnpm install          # Uses pnpm
npm run start:dev     # Dev server with watch
npm run build         # Production build
npm run lint          # ESLint with auto-fix
npm run test          # Jest unit tests
npm run test:e2e      # E2E tests
```

### Seeder

```bash
cd seeder-api
npm install
npm run migrate       # Run migrations
npm run seed          # Seed data
npm run seed:reset    # Drop all tables
npm run seed:lite     # Seed without 153k cities
```

---

## Architecture & Conventions

### Backend (Go) - Clean Architecture + DDD

```
backend/internal/
├── api/              # (legacy) HTTP handlers
├── handlers/         # HTTP request handlers (current)
├── middleware/       # Auth, CORS, rate limiting, security headers
├── core/
│   ├── domain/entity/ # Business entities (User, Company, Job, etc.)
│   ├── ports/         # Repository interfaces
│   └── usecases/      # Business logic (LoginUseCase, RegisterUseCase, etc.)
├── infrastructure/
│   ├── auth/          # JWT service
│   ├── persistence/   # PostgreSQL repository implementations
│   └── storage/       # S3/R2 storage adapter
├── services/          # Business services (Email, FCM, Storage, Admin)
├── dto/               # Data Transfer Objects
├── router/            # Route definitions
├── models/            # GORM models (legacy, being migrated)
├── database/          # DB connection & migration runner
└── utils/             # Utilities (JWT, sanitizer)
```

**Patterns**:
- Constructor injection: `func NewService(db *sql.DB) *Service`
- All DB operations accept `ctx context.Context`
- Error handling: `(T, error)` return tuples
- Repository interfaces in `core/ports/`, implementations in `infrastructure/persistence/`
- Test files: `*_test.go`

### Frontend (Next.js) - App Router

```
frontend/src/
├── app/               # File-based routing (20+ routes)
│   ├── dashboard/     # Protected routes (12+ sub-pages)
│   ├── jobs/          # Job listing & details
│   └── auth/          # Login, register flows
├── components/        # Reusable components (44+)
│   └── ui/            # shadcn/ui primitives (24+)
├── hooks/             # Custom React hooks
├── contexts/          # React contexts (auth, theme)
├── lib/               # Utilities (API calls, validation)
└── i18n/              # Internationalization (PT, EN, ES, JA)
```

**Patterns**:
- Server Components by default; use `'use client'` for interactivity
- Tailwind CSS utility classes
- Path alias: `@/*` maps to `./src/*`
- Form validation: React Hook Form + Zod schemas
- Global state: Zustand stores
- Test files: `*.test.tsx`

### Backoffice (NestJS) - Modular

```
backoffice/src/
├── admin/             # Dashboard & statistics
├── auth/              # JWT authentication (Passport)
├── email/             # Email worker (AMQP/LavinMQ consumer)
├── external-services/ # Credential management
├── fcm-tokens/        # Firebase push tokens
├── plans/             # Subscription plans
├── stripe/            # Stripe payment integration
└── tickets/           # Support tickets
```

**Patterns**:
- NestJS module pattern: `*.module.ts`, `*.controller.ts`, `*.service.ts`
- Guards: `@UseGuards(JwtAuthGuard)`
- DTOs: `create-*.dto.ts`, `update-*.dto.ts` with class-validator
- Prettier: single quotes, trailing commas

---

## Authentication & Authorization

- **JWT**: HS256 with HttpOnly cookies (web) + Bearer tokens (API/mobile)
- **4 roles**: `superadmin` > `admin` > `recruiter` > `candidate`
- **Middleware stack**: Auth (JWT+RBAC) -> CORS -> Rate Limiting (100 req/min) -> Security Headers -> XSS Sanitizer
- **JWT secret must match** between Backend and Backoffice
- **Test credentials**: See [TEST_USERS.md](TEST_USERS.md) for all test accounts

---

## Database

- PostgreSQL 16+ with UUID v7 for primary keys (SERIAL for reference tables)
- Migrations: `backend/migrations/` (43+ SQL files, numbered `000_` through `999_`)
- Core tables: `users`, `companies`, `user_companies`, `jobs`, `applications`, `favorite_jobs`, `notifications`, `tickets`, `activity_logs`, `job_payments`

---

## API Routes

All backend routes under `/api/v1`:
- **Auth**: `/auth/login`, `/auth/register/candidate`, `/auth/register/company`, `/auth/forgot-password`, `/auth/reset-password`
- **Jobs**: CRUD at `/jobs`, moderation at `/jobs/moderation`
- **Companies**: CRUD at `/companies`, status management
- **Users**: `/users/me` (profile), admin CRUD at `/users`
- **Applications**: `/applications` with status updates
- **Storage**: `/storage/upload-url` (presigned S3/R2 URLs)
- **Admin**: `/admin/companies`, `/admin/email-templates`, `/admin/email-settings`
- **Notifications**: `/notifications`, `/tokens` (FCM)
- **Chat**: `/conversations`, `/conversations/{id}/messages`

---

## External Services

| Service | Purpose |
|---------|---------|
| Stripe | Payment processing & subscriptions |
| Firebase (FCM) | Push notifications |
| Appwrite | Real-time chat/messaging |
| LavinMQ (AMQP) | Message queue for background jobs |
| Cloudflare R2 / S3 | File/image storage |
| Resend | Transactional email |

---

## Deployment

- **Environments**: `dev` (branch: dev), `hml` (branch: hml), `prd` (branch: main)
- **CI/CD**: Forgejo workflows (`.forgejo/workflows/`) + Drone (`.drone.yml`)
- **Container runtime**: Podman (Apolo), Coolify/Docker (Redbull), Kubernetes (production)
- **Registry**: Forgejo (`forgejo-gru.rede5.com.br/rede5/`)
- **Coolify UI**: https://redbull.rede5.com.br (Redbull VPS DEV environment)

### DEV Environments

| Server | Type | URLs |
|--------|------|------|
| **Redbull** (Coolify) | Auto-deploy via Git | `local.gohorsejobs.com`, `api-local.gohorsejobs.com` |
| **Apolo** (Podman/Quadlet) | Manual deploy | `dev.gohorsejobs.com`, `api-tmp.gohorsejobs.com` |

---

## Git Workflow

### Remotes

| Remote | URL | Function |
|--------|-----|----------|
| **origin** | git@github.com:rede5/gohorsejobs.git | GitHub - main development |
| **pipe** | https://pipe.gohorsejobs.com/bohessefm/gohorsejobs.git | Forgejo - mirror/CI |

### Branches

| Branch | Environment | Description |
|--------|-------------|-------------|
| **dev** | Development | Main working branch |
| **hml** | Staging | Pre-production testing |
| **main** | Production | Stable release |

### Sync Flow

```bash
# 1. Pull from GitHub
git pull origin dev

# 2. Push to Forgejo (pipe)
git push pipe dev
```

---

## Key Things to Know

1. Backend uses Clean Architecture + DDD; respect layer boundaries (handlers -> usecases -> ports/repositories)
2. Frontend uses Next.js App Router; pages in `src/app/`, components in `src/components/`
3. Backoffice shares the same PostgreSQL database as the backend
4. Migrations are plain SQL files, not managed by an ORM
5. Project supports 4 languages (PT, EN, ES, JA) via i18n
6. Environment variables in `.env` files (gitignored)
7. Use `start.sh` for local development

---

## ⚠️ Known Gotchas

### 1. PASSWORD_PEPPER must be `gohorse-pepper` everywhere

All migration seeds (`010_seed_super_admin.sql`) and the seeder-api use `gohorse-pepper` as the bcrypt pepper.
The Coolify/production env var `PASSWORD_PEPPER` **must match** or every login returns `AUTH_INVALID_CREDENTIALS`.

| Location | Value |
|----------|-------|
| `backend/.env` (local) | `gohorse-pepper` |
| `seeder-api/.env` | `gohorse-pepper` |
| Coolify DEV (`iw4sow8s0kkg4cccsk08gsoo`) | `gohorse-pepper` |
| Migration `010_seed_super_admin.sql` hash | computed with `gohorse-pepper` |

If you suspect a mismatch, see the full fix procedure in [DEVOPS.md](DEVOPS.md#troubleshooting-login-retorna-invalid-credentials).

### 2. Login API field: `email`, not `identifier`

The frontend login form sends `{ "email": "<username_or_email>", "password": "..." }`.
The backend core DTO (`internal/core/dto/user_auth.go`) has field `Email`, **not** `Identifier`.
The repository resolves it via `WHERE email = $1 OR identifier = $1`, so both username and email work.

Do **not** send `{ "identifier": "..." }` directly to `/api/v1/auth/login` — the field will be ignored and login will fail silently.

### 3. Bcrypt hashes in SQL — always use a file, never `-c`

Shell interprets `$` in bcrypt hashes as variable expansions. Example of **broken** approach:
```bash
# ❌ WRONG — $2b gets expanded by shell, hash gets corrupted
docker exec postgres psql -U user -d db -c "UPDATE users SET password_hash='$2b$10$abc...'"
```
Correct approach — write to file first, then use `-f`:
```bash
cat > /tmp/fix.sql <<'EOF'
UPDATE users SET password_hash = '$2b$10$4759wJhnXnBpcwSnVZm9Eu.wTqGYVCHkxAU5a2NxhsFHU42nV3tzW' WHERE identifier = 'lol';
EOF
docker cp /tmp/fix.sql <postgres_container>:/tmp/fix.sql
docker exec <postgres_container> psql -U gohorsejobs -d gohorsejobs -f /tmp/fix.sql
```

### 4. Test credentials (DEV/local.gohorsejobs.com)

| Role | Identifier | Password | Email |
|------|-----------|----------|-------|
| superadmin | `lol` | `Admin@2025!` | lol@gohorsejobs.com |
| superadmin | `superadmin` | `Admin@2025!` | admin@gohorsejobs.com |

---

## Documentation Index

| Document | Location | Description |
|----------|----------|-------------|
| API Reference | [API.md](API.md) | Endpoints, contracts, examples |
| API Security | [API_SECURITY.md](API_SECURITY.md) | Auth, RBAC, permissions |
| Database Schema | [DATABASE.md](DATABASE.md) | Tables, ERD, migrations |
| DevOps | [DEVOPS.md](DEVOPS.md) | Infrastructure, deployment, diagrams |
| Test Users | [TEST_USERS.md](TEST_USERS.md) | Credenciais de teste por role |
| Roadmap | [ROADMAP.md](ROADMAP.md) | Product direction |
| Tasks | [TASKS.md](TASKS.md) | Task tracking |
| Workflows | [WORKFLOWS.md](WORKFLOWS.md) | Deployment workflows |
| Backend | [../backend/BACKEND.md](../backend/BACKEND.md) | Go API details |
| Frontend | [../frontend/FRONTEND.md](../frontend/FRONTEND.md) | Next.js details |
| Backoffice | [../backoffice/BACKOFFICE.md](../backoffice/BACKOFFICE.md) | NestJS details |
| Seeder | [../seeder-api/SEEDER-API.md](../seeder-api/SEEDER-API.md) | Database seeding & test data |