MVP Complete: What We Built

The MVP Sprint

With the architecture pivot complete and security hardening done, Sessions 4-5 focused on building out
all the core features. The goal: a fully functional application that users could actually use.

Backend Services

Each service follows the same pattern: encrypted storage, user isolation, and comprehensive CRUD operations.

API Endpoint Summary

Frontend Pages

The Next.js frontend was built to match the API, with each major feature getting its own page:

frontend/src/app/
├── (auth)/
│   ├── login/page.tsx
│   ├── register/page.tsx
│   ├── mfa-setup/page.tsx
│   └── mfa-verify/page.tsx
├── dashboard/page.tsx
├── morning-pulse/page.tsx     # Morning check-in
├── daily-entry/page.tsx       # Main journaling
├── eod-reflection/page.tsx    # End of day
├── weekly-recap/page.tsx      # Weekly synthesis
├── pillars/
│   ├── page.tsx               # Pillar list
│   └── [id]/page.tsx          # Pillar detail
├── settings/
│   ├── page.tsx
│   ├── profile/page.tsx
│   ├── security/page.tsx
│   └── preferences/page.tsx
├── legal/
│   ├── privacy/page.tsx
│   └── terms/page.tsx
└── contact/page.tsx

The Daily Flow

TimOS is designed around a specific daily workflow. Here’s how the pieces connect:

API Client Pattern

The frontend uses a centralized API client with automatic token handling:

// frontend/src/lib/api.ts
const API_URL = process.env.NEXT_PUBLIC_API_URL || 'http://localhost:8000';

async function fetchWithAuth(
  endpoint: string,
  options: RequestInit = {}
): Promise {
  const token = localStorage.getItem('accessToken');

  const headers: HeadersInit = {
    'Content-Type': 'application/json',
    ...options.headers,
  };

  if (token) {
    headers['Authorization'] = `Bearer ${token}`;
  }

  const response = await fetch(`${API_URL}${endpoint}`, {
    ...options,
    headers,
  });

  // Handle token refresh
  if (response.status === 401) {
    const refreshed = await refreshToken();
    if (refreshed) {
      return fetchWithAuth(endpoint, options);
    }
    // Redirect to login
    window.location.href = '/login';
  }

  return response;
}

export const api = {
  get: (endpoint: string) =>
    fetchWithAuth(endpoint).then(r => r.json()),

  post: (endpoint: string, data: any) =>
    fetchWithAuth(endpoint, {
      method: 'POST',
      body: JSON.stringify(data),
    }).then(r => r.json()),

  put: (endpoint: string, data: any) =>
    fetchWithAuth(endpoint, {
      method: 'PUT',
      body: JSON.stringify(data),
    }).then(r => r.json()),

  delete: (endpoint: string) =>
    fetchWithAuth(endpoint, { method: 'DELETE' }).then(r => r.json()),
};