tad-writer

TAD Writer Agent

Synthesize PRD extraction and all 5 research round outputs into comprehensive Technical Architecture Document (tad.md).

Input

{
  "project_path": "/path/to/project",
  "prd_extracted": { ... },
  "research_rounds": {
    "technology_stack": { ... },
    "infrastructure": { ... },
    "security": { ... },
    "risk_assessment": { ... },
    "holistic_review": { ... }
  }
}

Process

Step 1: Synthesize Research Outputs

Integrate findings from all 5 research rounds into unified narrative:

• Tech stack recommendations consolidated
• Infrastructure architecture unified across rounds
• Security findings incorporated with risk mitigations
• Risk matrix prioritized across rounds
• Holistic alignment confirmed

Step 2: Generate tad.md Structure

Create comprehensive TAD following references/tad-template.md:

# Technical Architecture Document: PinBoard

**Last Updated**: 2026-03-24
**Version**: 1.0.0
**Status**: Active

---

## 1. System Overview

### 1.1 Purpose & Scope

PinBoard is a visual bookmark management platform for teams to collect, organize, and share inspiration from across the web. This document defines the technical architecture for implementing core features (pinning, board organization, team collaboration) to reach 10K users in year 1 and 100K by year 2.

### 1.2 Alignment with PRD

- **Core Features**: Pins, Boards, Tags, Team Sharing
- **Platforms**: Web (desktop/mobile-responsive), REST API for integrations
- **Scale**: 10K → 100K users, 1M pins by year 2
- **Budget**: $2M Series A runway
- **Timeline**: MVP in 4 months, growth features in 8 months

### 1.3 Constraints

- Team: 4 engineers, 1 designer, 1 PM
- Timeline: 4-month MVP deadline
- Technology: JavaScript/TypeScript preference for rapid development
- Deployment: Cloud-native (AWS preferred, Vercel for frontend)

---

## 2. Architecture Diagram

### 2.1 System Architecture

\`\`\`
┌─────────────────────────────────────────────────────────────────────┐
│                          Client Layer                                │
├─────────────────┬─────────────────┬─────────────────┬───────────────┤
│   Web Browser   │   Figma Plugin  │  Slack App      │  Mobile Web   │
│ (React 19 SPA)  │  (JavaScript)   │  (Node Bot)     │               │
└────────┬────────┴────────┬────────┴────────┬────────┴───────┬───────┘
         │                 │                 │                │
         │                 └─────────────────┼────────────────┘
         │                                   │
         └───────────────────────────────────┼──────────────────┐
                                             │                  │
                    ┌────────────────────────┴────────────────────┐
                    │      API Gateway (Auth Middleware)          │
                    └──────────────────────────────────────────────┘
                                             │
         ┌───────────────────────────────────┼───────────────────────────┐
         │                                   │                           │
    ┌────┴──────┐  ┌──────────────┐  ┌──────┴──────┐  ┌────────────────┐
    │  Pins API │  │  Boards API  │  │ Sharing API │  │  Search API    │
    │ (Node.js) │  │  (Node.js)   │  │ (Node.js)   │  │ (Node.js)      │
    └────┬──────┘  └──────┬───────┘  └──────┬──────┘  └────┬───────────┘
         │                │                 │             │
         └────────────────┼─────────────────┼─────────────┘
                          │
         ┌────────────────┼─────────────────┐
         │                │                 │
    ┌────┴──────────┐ ┌──┴──────────┐ ┌───┴────────────┐
    │ PostgreSQL    │ │  Elasticsearch │ │  AWS S3 + CDN │
    │ (Users/Auth)  │ │  (Tag Search) │ │  (Media)      │
    └───────────────┘ └───────────────┘ └───────────────┘
\`\`\`

### 2.2 Data Flow Diagram

Create Mermaid diagrams for:
- Pin creation flow (web → API → DB → index)
- Board sharing flow (owner → permission check → share link → invited user)