Architecture prompts

Write a technical design document.

What we are building and why now: [THE PROBLEM AND THE TRIGGER]
Who is affected: [USERS, TEAMS, SYSTEMS]
Requirements: [FUNCTIONAL, PLUS ANY SCALE, LATENCY, AVAILABILITY, OR COMPLIANCE NUMBERS]
Existing system: [WHAT IS THERE NOW, THE STACK, AND WHAT WE MUST NOT BREAK]
Constraints: [TEAM SIZE, DEADLINE,

Threat model this system.

What it does and who uses it: [SYSTEM + USER TYPES INCLUDING ANONYMOUS ONES]
Architecture, data flows, and dependencies:
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[PASTE THE DESIGN, THE RELEVANT CODE, OR A DESCRIPTION OF COMPONENTS AND HOW DATA MOVES BETWEEN THEM]
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Data handled: [WHAT KINDS, INCLUDING PERSONAL, PAYMENT, HEALTH, OR CREDENTIALS]
Au

Design the retry and idempotency behavior for this operation.

The operation and what it does: [e.g. "charge a card and create an order", "process an inbound webhook", "run a nightly sync job"]
Where it runs and what calls it: [SERVICE, QUEUE, CRON, CLIENT]
External systems it touches: [APIS, DATABASES, QUEUES, and whether each is idempot

Help me make an architecture decision.

The decision: [WHAT YOU'RE DECIDING, e.g. "how to handle background jobs", "monolith vs services for the new module"]
System today: [STACK, SCALE, TEAM SIZE, DEPLOYMENT SETUP]
Requirements that matter: [FUNCTIONAL + NUMBERS WHERE THEY EXIST: requests/sec, data volume, latency budget, team's operatio

[DESIGN a new API / REVIEW my existing API] for [THE DOMAIN, e.g. "order management for our storefront"].

The resources and operations needed: [WHAT CLIENTS MUST BE ABLE TO DO: plain language list]
Consumers: [INTERNAL SERVICES / THIRD-PARTY DEVELOPERS / MOBILE APPS: third parties raise the stakes on consistency and versioning]
Existing 

Design the database schema for [THE FEATURE/SYSTEM, e.g. "orders, payments, and refunds for our marketplace"].

The entities and how they relate, in plain language: [DESCRIBE THE DOMAIN: what exists, what belongs to what, what changes often]
Database: [POSTGRES (assumed) / MYSQL / OTHER + VERSION]
Scale expectations, honestly: [ROWS/GROWT