# Roadmap: Task Management API

## Overview

**Total Duration**: ~16 hours (2 days)  
**Phases**: 5  
**Waves**: 11  

---

## Phase 1: Foundation [2 waves]

**Goal**: Set up project infrastructure and database

**Duration**: ~2 hours

### Wave 1: Project Setup [M]
**Size**: Medium (3 tasks, 45-60 min)  
**Tasks**:
- Initialize Node.js project with Express
- Configure environment variables and scripts
- Set up testing framework (Jest)
- Add linting and formatting (ESLint, Prettier)

**Deliverables**:
- package.json configured
- .env.example created
- Test and lint scripts working

---

### Wave 2: Database Setup [M]
**Size**: Medium (3 tasks, 45-60 min)  
**Dependencies**: Wave 1 complete  
**Tasks**:
- Set up PostgreSQL connection
- Create database migration system
- Design and create initial schema
- Add database health check

**Deliverables**:
- Database connected
- Migration system functional
- Initial tables created

**Checkpoint**: "Phase 1 complete - foundation ready"

---

## Phase 2: Authentication [3 waves]

**Goal**: Implement secure user authentication

**Duration**: ~3 hours

### Wave 1: User Model [M]
**Size**: Medium (2 tasks, 40 min)  
**Dependencies**: Phase 1 complete  
**Tasks**:
- Create User model and database table
- Implement password hashing with bcrypt

**Deliverables**:
- User model with secure password storage
- Unit tests for password hashing

---

### Wave 2: Auth Endpoints [L]
**Size**: Large (4 tasks, 75-90 min)  
**Dependencies**: Phase 2 Wave 1 complete  
**Tasks**:
- Create registration endpoint (POST /auth/register)
- Create login endpoint with JWT generation (POST /auth/login)
- Add refresh token functionality (POST /auth/refresh)
- Implement JWT utilities

**Deliverables**:
- Auth endpoints functional
- JWT generation and validation working
- Integration tests for auth flow

**Checkpoint**: Auto (large wave)

---

### Wave 3: Auth Middleware [S]
**Size**: Small (2 tasks, 30 min)  
**Dependencies**: Phase 2 Wave 2 complete  
**Tasks**:
- Create authentication middleware
- Add authorization helpers

**Deliverables**:
- Middleware to protect routes
- Tests for auth middleware

**Checkpoint**: "Phase 2 complete - authentication working"

---

## Phase 3: Task Management [3 waves]

**Goal**: Build core task CRUD operations

**Duration**: ~4 hours

### Wave 1: Task Model & Create [M]
**Size**: Medium (3 tasks, 50 min)  
**Dependencies**: Phase 2 complete  
**Tasks**:
- Create Task model and database table
- Implement POST /tasks (create task)
- Add input validation for tasks
- Add authorization (user-scoped)

**Deliverables**:
- Task model created
- Create endpoint working
- Validation in place

---

### Wave 2: Task Read Operations [M]
**Size**: Medium (3 tasks, 50 min)  
**Dependencies**: Phase 3 Wave 1 complete  
**Tasks**:
- Implement GET /tasks (list tasks with pagination)
- Implement GET /tasks/:id (get single task)
- Add query filtering (status, date range)

**Deliverables**:
- List and detail endpoints working
- Pagination functional
- Basic filtering implemented

---

### Wave 3: Task Update & Delete [S]
**Size**: Small (2 tasks, 30 min)  
**Dependencies**: Phase 3 Wave 2 complete  
**Tasks**:
- Implement PUT /tasks/:id (update task)
- Implement DELETE /tasks/:id (delete task)

**Deliverables**:
- Update and delete endpoints working
- Full CRUD complete
- Comprehensive endpoint tests

**Checkpoint**: "Phase 3 complete - task CRUD functional"

---

## Phase 4: Advanced Features [2 waves]

**Goal**: Add projects, tags, and priorities

**Duration**: ~4 hours

### Wave 1: Projects & Tags [L]
**Size**: Large (5 tasks, 90-100 min)  
**Dependencies**: Phase 3 complete  
**Tasks**:
- Create Project model and endpoints
- Create Tag model and endpoints
- Add task-project associations
- Add task-tag associations (many-to-many)
- Add priority field to tasks

**Deliverables**:
- Project CRUD working
- Tag CRUD working
- Task associations functional

**Checkpoint**: Auto (large wave)

---

### Wave 2: Search & Filtering [M]
**Size**: Medium (3 tasks, 60 min)  
**Dependencies**: Phase 4 Wave 1 complete  
**Tasks**:
- Add advanced filtering to GET /tasks (by project, tags, priority)
- Add sorting options
- Add full-text search for task descriptions

**Deliverables**:
- Advanced query options working
- Search functional
- Performance acceptable

**Checkpoint**: "Phase 4 complete - advanced features ready"

---

## Phase 5: Polish & Documentation [1 wave]

**Goal**: Production-ready API with documentation

**Duration**: ~3 hours

### Wave 1: Production Readiness [L]
**Size**: Large (6 tasks, 120 min)  
**Dependencies**: Phase 4 complete  
**Tasks**:
- Add request logging (Winston)
- Add rate limiting
- Configure CORS
- Implement comprehensive error handling
- Write API documentation (OpenAPI/Swagger)
- Add health check endpoint
- Run security audit
- Performance testing

**Deliverables**:
- All production middleware configured
- API documentation complete
- Security audit passed
- Ready for deployment

**Checkpoint**: Auto (large wave) + "Phase 5 complete - production ready"

---

## Wave Dependencies

```
Phase 1: Wave 1 → Wave 2
Phase 2: Wave 1 → Wave 2 → Wave 3
Phase 3: Wave 1 → Wave 2 → Wave 3
Phase 4: Wave 1 → Wave 2
Phase 5: Wave 1 (standalone)
```

---

## Checkpoint Strategy

**Automatic Checkpoints**: 4
- After each Large wave (3 total)
- After Phase 5 completion

**Manual Checkpoints**: 4 (recommended)
- After Phase 1: "Foundation ready"
- After Phase 2: "Authentication working"
- After Phase 3: "Task CRUD functional"
- After Phase 4: "Advanced features ready"

**Total Expected**: 8 checkpoints

---

## Differences from v1.x

This v2.0 roadmap adds:
- ✅ **Wave structure** within each phase
- ✅ **Wave sizes** [S], [M], [L] for time estimation
- ✅ **Dependencies** between waves
- ✅ **Checkpoint recommendations** at strategic points
- ✅ **Deliverables** per wave for clarity

**Backward compatible**: Can still execute phase-by-phase without using wave features.