Architecture Designer (Fase 0)

Transform project requirements into concrete architectural decisions with proper ADR documentation.

Triggers

• "Help me define the architecture"
• "Define architecture"
• "Let's design the architecture"
• "Help me with technical architecture"
• /architecture

Prerequisites

• docs/project.md should exist with project definition
• If not exists, suggest: "Let's first interview about the project"

Purpose

Create:

1. Architecture overview in docs/architecture/_index.md
2. ADRs (Architecture Decision Records) in docs/decisions/
3. Technical foundation for feature development

Process

1. Read Project Context

# Read project definition
cat docs/project.md

# Check existing architecture docs
ls -la docs/architecture/ 2>/dev/null
ls -la docs/decisions/ 2>/dev/null

2. Identify Key Decisions

Based on project.md, identify decisions needed:

3. Interview for Each Decision

For each major decision, ask:

"For [CATEGORY], I see a few options:

A) [Option A] - [Pros: X, Y] [Cons: Z]
B) [Option B] - [Pros: X, Y] [Cons: Z]
C) [Option C] - [Pros: X, Y] [Cons: Z]

Based on your project (MVP timeline, team size, scale needs),
I'd recommend [X] because [reason].

What's your preference?"

4. Create ADRs

For each decision, create docs/decisions/ADR-NNN-title.md

5. Create Architecture Overview

Update docs/architecture/_index.md with:

• System diagram
• Tech stack table linking to ADRs
• Project structure
• Key patterns

6. Interview Rules

ARCHITECTURE INTERVIEW RULES

1. Always provide options with trade-offs
   Never ask "what database?" - ask "PostgreSQL or MongoDB? Here's why..."

2. Make recommendations based on project context
   "Given your MVP timeline, I recommend X"

3. Create ADR immediately after each decision
   Don't wait until the end

4. Challenge over-engineering
   "Do you really need Kubernetes for MVP? ECS is simpler."

5. Document the WHY, not just the WHAT
   Future you will thank present you

7. Completion Check

Before ending, verify:

• All major categories have decisions
• Each decision has an ADR
• Architecture overview exists
• Project structure is defined
• No conflicting decisions

8. Handoff

When complete:

Architecture defined. Created:
- docs/architecture/_index.md (overview)
- docs/decisions/ADR-001-*.md through ADR-00N-*.md

Next step:
"Define MVP features" -> Creates feature folders ready for implementation

Or: "Let's start with the first feature"