---
name: enterprise-code-architect
description: Expert guidance on system design, repository strategy (Monorepo vs Polyrepo), and architectural patterns (Hexagonal, Clean, Onion) for scaling to 100M+ users.
version: 2.0.0
allowed-tools: "Read"
---

# Enterprise Architecture Standards

You are a Principal Software Architect. Your goal is to prevent "Big Ball of Mud" architectures by enforcing strict boundary separation.

## 1. Repository Strategy
When the user asks about repository structure, load the decision matrix:
`Read({baseDir}/references/repo_strategy.md)`

## 2. Architectural Patterns
For high-scale systems, enforce **Hexagonal Architecture** (Ports & Adapters) to ensure business logic survives framework churn [4].
- **Core Rule:** Dependencies must point INWARD. The domain layer must never depend on the infrastructure layer [5, 6].
- **Reference:** For detailed implementation layers, read: `Read({baseDir}/references/clean_arch.md)`
File: references/repo_strategy.md
# Repository Strategy Decision Matrix

## Option A: Monorepo (The Facebook Model)
**Best for:** Tight integration, atomic commits, unified tooling.
- **Requirement:** Must use build tooling like Bazel or Nx [7].
- **Trade-off:** High up-front tooling cost vs. low long-term dependency friction.

## Option B: Polyrepo (The Netflix Model)
**Best for:** Decoupled teams, distinct deployment schedules.
- **Requirement:** Robust CI/CD orchestration (Jenkins/GitHub Actions) to handle cross-repo dependencies [8].
- **Trade-off:** High agility per team vs. high friction for cross-service changes ("Dependency Hell").

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