Implementation Roadmap & Checklist

FamilyTogether - Local-First SaaS Platform

Version: 1.0
Date: February 10, 2026
Duration: 6 Weeks to MVP
Status: Pre-Development

Quick Start Checklist

Before beginning development, ensure you have completed:

Read all documentation in this directory
Supabase account created
Development environment set up (see Development_Setup_Guide.md)
Git repository initialized
All prerequisites installed (.NET SDK, Node.js, etc.)

Week-by-Week Implementation Plan

WEEK 1: Foundation & Infrastructure (Days 1-7)

Day 1-2: Supabase Setup & Database

Tasks:

Create Supabase project
Save all credentials securely
Run PostgreSQL migration script (see Database_Schema_Design.md)
Verify all tables created correctly
Enable Row Level Security on all tables
Create RLS policies
Test database connection

Deliverables:

✅ Supabase project operational
✅ All tables created with proper indexes
✅ RLS policies active

Verification:

-- Run in Supabase SQL Editor
SELECT tablename FROM pg_tables WHERE schemaname = 'public';
-- Should show: families, members, tasks, point_transactions, rewards, reward_redemptions

Day 3-4: ASP.NET Core API Setup

Tasks:

Create FamilyTogether.API project (dotnet new webapi)
Install NuGet packages
Create folder structure (Controllers, Services, Data, etc.)
Create AppDbContext with all entities
Configure appsettings.json with Supabase connection
Configure Program.cs (JWT, CORS, DbContext)
Create health check endpoint for testing
Test API runs locally (dotnet run)

Deliverables:

✅ API project structure complete
✅ Database connection working
✅ API accessible at http://localhost:5000

Verification:

dotnet run
# Navigate to https://localhost:5001/swagger
# Should see Swagger UI

Day 5: Authentication Implementation

Tasks:

Create AuthController
Implement POST /api/auth/register endpoint
Implement POST /api/auth/login endpoint
Configure JWT authentication middleware
Create test user via Supabase dashboard
Test login endpoint with Postman
Verify JWT token generation

Code to Implement:

// AuthController.cs
[HttpPost("register")]
public async Task<IActionResult> Register([FromBody] RegisterRequest request)
{
    // 1. Create user in Supabase Auth
    // 2. Create family record
    // 3. Create parent member record
    // 4. Return JWT token
}

[HttpPost("login")]
public async Task<IActionResult> Login([FromBody] LoginRequest request)
{
    // 1. Verify credentials with Supabase
    // 2. Get family & member info
    // 3. Return JWT token
}

Deliverables:

✅ Users can register
✅ Users can login
✅ JWT tokens issued correctly

Day 6-7: Deploy API to Railway.app

Tasks:

Environment Variables to Set:

SUPABASE_URL=https://xxxxx.supabase.co
SUPABASE_KEY=your_anon_key
SUPABASE_JWT_SECRET=your_jwt_secret
DATABASE_URL=postgresql://...
CORS_ORIGINS=https://familytogether.netlify.app

Deliverables:

✅ API deployed and accessible
✅ Production database connection working
✅ Authentication working in production

WEEK 2: SPA Local-First Implementation (Days 8-14)

Day 8-9: SPA Project Setup & IndexedDB

Tasks:

Create FamilyTogether.SPA folder structure
Create index.html with basic layout
Implement IndexedDB initialization (src/services/db.js)
Create object stores (tasks, members, syncQueue, etc.)
Create IndexedDB wrapper functions (get, add, update, delete)
Test IndexedDB in browser console

Code to Implement:

// src/services/db.js
export async function initDB() {
    return new Promise((resolve, reject) => {
        const request = indexedDB.open('FamilyTogetherDB', 1);
        
        request.onupgradeneeded = (event) => {
            const db = event.target.result;
            
            // Create object stores with indexes
            const tasksStore = db.createObjectStore('tasks', { keyPath: 'id' });
            tasksStore.createIndex('family_id', 'family_id', { unique: false });
            tasksStore.createIndex('assigned_to', 'assigned_to', { unique: false });
            
            // ... create other stores
        };
        
        request.onsuccess = () => resolve(request.result);
        request.onerror = () => reject(request.error);
    });
}

Deliverables:

✅ IndexedDB initialized
✅ All object stores created
✅ CRUD operations working

Day 10-11: SPA Authentication & Supabase Integration

Tasks:

Add Supabase JavaScript client
Create auth service (src/services/auth.js)
Implement login UI (HTML + CSS)
Implement register UI
Handle JWT token storage in localStorage
Create authentication state management
Test login/register flows

Code to Implement:

// src/services/auth.js
import { createClient } from '@supabase/supabase-js';

const supabase = createClient(CONFIG.supabaseUrl, CONFIG.supabaseKey);

export async function login(email, password) {
    const { data, error } = await supabase.auth.signInWithPassword({
        email,
        password
    });
    
    if (error) throw error;
    
    // Store token
    localStorage.setItem('auth_token', data.session.access_token);
    
    return data;
}

Deliverables:

✅ Users can login via SPA
✅ JWT token stored securely
✅ UI shows logged-in state

Day 12-13: SPA Sync Queue Implementation

Tasks:

Create sync service (src/services/sync.js)
Implement SyncManager class
Create queueChange() function
Implement sync() function to POST to API
Handle sync responses (accepted/rejected changes)
Implement conflict resolution (apply server version)
Add online/offline event listeners

Code to Implement:

// src/services/sync.js
export class SyncManager {
    constructor(db, apiUrl, authToken) {
        this.db = db;
        this.apiUrl = apiUrl;
        this.authToken = authToken;
    }
    
    startAutoSync() {
        setInterval(() => this.sync(), 30000);  // 30 seconds
        window.addEventListener('online', () => this.sync());
    }
    
    async sync() {
        if (!navigator.onLine) return;
        
        // Get pending changes from sync queue
        const changes = await this.db.syncQueue
            .where('status').equals('pending')
            .toArray();
        
        // POST to /api/sync
        const response = await fetch(`${this.apiUrl}/api/sync`, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
                'Authorization': `Bearer ${this.authToken}`
            },
            body: JSON.stringify({ changes })
        });
        
        const result = await response.json();
        
        // Process accepted/rejected changes
        await this.processServerResponse(result);
    }
}

Deliverables:

✅ Changes queued when offline
✅ Auto-sync every 30 seconds when online
✅ Sync conflicts handled

Day 14: SPA Offline Testing

Tasks:

Test Scenarios:

Create 5 tasks offline → Sync → Verify all 5 in database
Edit task offline → Sync → Verify changes applied
Delete task offline → Sync → Verify soft delete
Trigger conflict → Verify LWW resolution

Deliverables:

✅ All offline scenarios pass
✅ Sync working reliably

WEEK 3: WPF Desktop Application (Days 15-21)

Day 15-16: WPF Project Setup

Tasks:

Create WPF project (dotnet new wpf)
Install NuGet packages (EF Core SQLite, Newtonsoft.Json)
Create folder structure (Data, Services, ViewModels, Views)
Create AppDbContext for SQLite
Create entity models matching database schema
Run initial EF migration
Test SQLite database created in AppData

SQLite Location:

%AppData%\FamilyTogether\app.db

Deliverables:

✅ WPF project structure complete
✅ SQLite database initialized
✅ Can save and retrieve data locally

Day 17-18: WPF MVVM Implementation

Tasks:

Code to Implement:

// ViewModels/TasksViewModel.cs
public class TasksViewModel : ObservableObject
{
    private readonly ITaskService _taskService;
    private ObservableCollection<TaskEntity> _tasks;
    
    public ObservableCollection<TaskEntity> Tasks
    {
        get => _tasks;
        set => SetProperty(ref _tasks, value);
    }
    
    public ICommand LoadTasksCommand { get; }
    public ICommand CreateTaskCommand { get; }
    
    public TasksViewModel(ITaskService taskService)
    {
        _taskService = taskService;
        LoadTasksCommand = new RelayCommand(async () => await LoadTasksAsync());
        CreateTaskCommand = new RelayCommand<TaskEntity>(async (task) => await CreateTaskAsync(task));
    }
    
    private async Task LoadTasksAsync()
    {
        var tasks = await _taskService.GetTasksAsync();
        Tasks = new ObservableCollection<TaskEntity>(tasks);
    }
}

Deliverables:

✅ MVVM pattern implemented
✅ UI responsive to ViewModel changes
✅ Commands working

Day 19-20: WPF Sync Service

Tasks:

Create SyncService class
Implement HttpClient for API calls
Create sync queue processing logic
Implement timer for auto-sync (30 seconds)
Handle offline/online scenarios
Apply server updates to local database
Test sync with Railway API

Code to Implement:

// Services/SyncService.cs
public class SyncService
{
    private readonly HttpClient _httpClient;
    private readonly AppDbContext _dbContext;
    private readonly Timer _syncTimer;
    
    public async Task SyncAsync()
    {
        // Get pending changes
        var changes = await _dbContext.SyncQueue
            .Where(sq => sq.Status == "pending")
            .ToListAsync();
        
        if (!changes.Any()) return;
        
        // Build payload
        var payload = new { changes = changes.Select(...) };
        
        // POST to API
        var response = await _httpClient.PostAsJsonAsync("/api/sync", payload);
        var result = await response.Content.ReadFromJsonAsync<SyncResponse>();
        
        // Process response
        await ProcessServerResponse(result);
    }
}

Deliverables:

✅ Auto-sync working every 30 seconds
✅ Offline changes synced when online
✅ Server updates applied to local DB

Day 21: WPF Testing & Polish

Tasks:

Test all CRUD operations
Test offline functionality
Test sync with SPA (multi-device scenario)
Add loading indicators
Add error handling and user feedback
Polish UI (colors, fonts, spacing)
Create installer (optional)

Deliverables:

✅ WPF app fully functional
✅ Syncs with SPA
✅ User experience polished

WEEK 4: Backend Sync Logic & Task Workflows (Days 22-28)

Day 22-23: SyncController Implementation

Tasks:

Code to Implement:

// Controllers/SyncController.cs
[ApiController]
[Route("api/[controller]")]
[Authorize]
public class SyncController : ControllerBase
{
    private readonly ISyncService _syncService;
    
    [HttpPost]
    public async Task<IActionResult> Sync([FromBody] SyncRequest request)
    {
        var userId = User.FindFirst("sub").Value;
        var familyId = await GetFamilyIdForUser(userId);
        
        var response = await _syncService.ProcessSyncAsync(
            familyId,
            request.Changes,
            request.LastSyncTimestamp
        );
        
        return Ok(response);
    }
}

Deliverables:

✅ Sync endpoint working
✅ Conflicts resolved correctly
✅ Server sends back updates

Day 24-25: Task Management Controllers

Tasks:

Deliverables:

✅ All task endpoints working
✅ Parent/child role checks enforced
✅ Integration tests passing

Day 26: Points & Rewards Controllers

Tasks:

Create PointsController
Implement GET /api/points
Implement GET /api/points/history
Implement POST /api/points/adjust (admin only)
Create RewardsController
Implement CRUD for rewards
Implement POST /api/rewards/{id}/redeem
Test point calculation accuracy
Test reward redemption flow

Deliverables:

✅ Points system working
✅ Rewards can be created and redeemed
✅ Point transactions accurate

Day 27: Family Management & Testing

Tasks:

Create FamilyController
Implement GET /api/family/members
Implement POST /api/family/members
Implement DELETE /api/family/members/{id}
Write unit tests for all services
Write integration tests for all controllers
Test end-to-end workflows
Fix any bugs found

Deliverables:

✅ Family management complete
✅ Test coverage >80%
✅ All critical bugs fixed

Day 28: Documentation & Code Review

Tasks:

Deliverables:

✅ Code well-documented
✅ Ready for deployment

WEEK 5: Testing & Bug Fixes (Days 29-35)

Day 29-30: Multi-Device Testing

Test Scenarios:

Two SPAs syncing:
- Create task in SPA 1
- Verify appears in SPA 2 after sync
- Edit task in SPA 2
- Verify changes appear in SPA 1
SPA and WPF syncing:
- Create task in WPF
- Verify appears in SPA
- Complete task in SPA
- Approve task in WPF
Conflict resolution:
- Edit same task offline in both apps
- Bring online, sync both
- Verify LWW resolution

Deliverables:

✅ All multi-device scenarios pass
✅ Sync working reliably

Day 31-32: Edge Case Testing

Test Scenarios:

User offline for 1 week, 100+ changes, then sync
Network interruption during sync
Corrupted IndexedDB/SQLite database
Extremely large task lists (1000+ tasks)
Rapid task creation (stress test)
Invalid JWT token
Database connection failure
Supabase downtime simulation

Deliverables:

✅ Edge cases handled gracefully
✅ Error messages helpful

Day 33-34: Performance Testing & Optimization

Tasks:

Run database query performance tests
Add missing indexes if queries slow
Test API response times under load
Optimize N+1 query problems
Test IndexedDB with large datasets
Optimize sync payload size
Implement pagination for large lists
Add caching where appropriate

Performance Targets:

API responses: <500ms p95
Database queries: <50ms average
Sync for 100 changes: <2 seconds
IndexedDB operations: <100ms

Deliverables:

✅ Performance benchmarks met
✅ App feels fast and responsive

Day 35: Security Audit

Security Checklist:

Deliverables:

✅ Security audit complete
✅ All vulnerabilities addressed

WEEK 6: Deployment & Launch (Days 36-42)

Day 36: Production Deployment Preparation

Tasks:

Review all environment variables
Set up production Supabase project (if separate)
Configure production database
Run migrations in production
Set up monitoring (Sentry, Uptime Robot)
Create deployment checklist
Test production API endpoints

Deliverables:

✅ Production environment ready
✅ Monitoring configured

Day 37: SPA Deployment to Netlify

Tasks:

netlify.toml:

[build]
  publish = "."
  command = ""

[[redirects]]
  from = "/*"
  to = "/index.html"
  status = 200

Deliverables:

✅ SPA deployed and accessible
✅ All features working in production

Day 38: WPF Distribution

Tasks:

Build WPF release configuration
Create installer (optional - ClickOnce)
Create GitHub release
Upload WPF executable
Write installation instructions
Test download and install
Update app to point to production API

Deliverables:

✅ WPF app available for download
✅ Installation process documented

Day 39-40: Beta Testing

Tasks:

Deliverables:

✅ Beta users onboarded
✅ Feedback collected
✅ Critical bugs fixed

Day 41: Documentation & User Guides

Tasks:

Deliverables:

✅ User documentation complete
✅ Legal documents ready

Day 42: Official Launch 🚀

Tasks:

Deliverables:

✅ FamilyTogether v1.0 LAUNCHED!

Daily Development Checklist

Use this checklist each day:

Morning

Pull latest code from git
Review tasks for today
Check Sentry for errors (if deployed)
Prioritize any bugs

During Development

Write tests first (TDD when possible)
Commit frequently (every feature/fix)
Write clear commit messages
Comment complex code
Follow code style guide

End of Day

Risk Mitigation

Common Blockers & Solutions

Risk	Mitigation
Supabase down	Have Railway API use direct PostgreSQL connection
IndexedDB not working	Fallback to localStorage for critical data
Sync conflicts frequent	Provide manual resolution UI
Railway free tier limits	Monitor usage, upgrade if needed
JWT security breach	Implement refresh tokens, short expiry
Offline for 30+ days	Implement sync pagination, limit to 1000 changes

Success Metrics

Track these weekly:

Metric	Week 1	Week 2	Week 3	Week 4	Week 5	Week 6
API endpoints complete	2	5	8	15	20	24
Test coverage %	20%	40%	60%	75%	85%	85%
Bugs found	5	10	15	20	10	5
Bugs fixed	3	8	12	18	20	24
Features complete	10%	30%	50%	75%	95%	100%

Post-Launch Roadmap

Version 1.1 (Month 2)

Version 1.2 (Month 3)

Streak system
Recurring tasks improvements
Mobile responsive design
Progressive Web App (PWA)

Version 2.0 (Month 4-6)

Native mobile apps (React Native / .NET MAUI)
Advanced conflict resolution (manual review)
Team/school features
API for third-party integrations

END OF IMPLEMENTATION ROADMAP

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Implementation Roadmap & Checklist

FamilyTogether - Local-First SaaS Platform

Quick Start Checklist

Week-by-Week Implementation Plan

WEEK 1: Foundation & Infrastructure (Days 1-7)

Day 1-2: Supabase Setup & Database

Day 3-4: ASP.NET Core API Setup

Day 5: Authentication Implementation

Day 6-7: Deploy API to Railway.app

WEEK 2: SPA Local-First Implementation (Days 8-14)

Day 8-9: SPA Project Setup & IndexedDB

Day 10-11: SPA Authentication & Supabase Integration

Day 12-13: SPA Sync Queue Implementation

Day 14: SPA Offline Testing

WEEK 3: WPF Desktop Application (Days 15-21)

Day 15-16: WPF Project Setup

Day 17-18: WPF MVVM Implementation

Day 19-20: WPF Sync Service

Day 21: WPF Testing & Polish

WEEK 4: Backend Sync Logic & Task Workflows (Days 22-28)

Day 22-23: SyncController Implementation

Day 24-25: Task Management Controllers

Day 26: Points & Rewards Controllers

Day 27: Family Management & Testing

Day 28: Documentation & Code Review

WEEK 5: Testing & Bug Fixes (Days 29-35)

Day 29-30: Multi-Device Testing

Day 31-32: Edge Case Testing

Day 33-34: Performance Testing & Optimization

Day 35: Security Audit

WEEK 6: Deployment & Launch (Days 36-42)

Day 36: Production Deployment Preparation

Day 37: SPA Deployment to Netlify

Day 38: WPF Distribution

Day 39-40: Beta Testing

Day 41: Documentation & User Guides

Day 42: Official Launch 🚀

Daily Development Checklist

Morning

During Development

End of Day

Risk Mitigation

Common Blockers & Solutions

Success Metrics

Post-Launch Roadmap

Version 1.1 (Month 2)

Version 1.2 (Month 3)

Version 2.0 (Month 4-6)