senior-architect

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---
name: "senior-architect"
description: This skill should be used when the user asks to "design system architecture", "evaluate microservices vs monolith", "create architecture diagrams", "analyze dependencies", "choose a database", "plan for scalability", "make technical decisions", or "review system design". Use for architecture decision records (ADRs), tech stack evaluation, system design reviews, dependency analysis, and generating architecture diagrams in Mermaid, PlantUML, or ASCII format.
---

# Senior Architect

Architecture design and analysis tools for making informed technical decisions.

## Table of Contents

- [Quick Start](#quick-start)
- [Tools Overview](#tools-overview)
  - [Architecture Diagram Generator](#1-architecture-diagram-generator)
  - [Dependency Analyzer](#2-dependency-analyzer)
  - [Project Architect](#3-project-architect)
- [Decision Workflows](#decision-workflows)
  - [Database Selection](#database-selection-workflow)
  - [Architecture Pattern Selection](#architecture-pattern-selection-workflow)
  - [Monolith vs Microservices](#monolith-vs-microservices-decision)
- [Reference Documentation](#reference-documentation)
- [Tech Stack Coverage](#tech-stack-coverage)
- [Common Commands](#common-commands)

---

## Quick Start

```bash
# Generate architecture diagram from project
python scripts/architecture_diagram_generator.py ./my-project --format mermaid

# Analyze dependencies for issues
python scripts/dependency_analyzer.py ./my-project --output json

# Get architecture assessment
python scripts/project_architect.py ./my-project --verbose
```

---

## Tools Overview

### 1. Architecture Diagram Generator

Generates architecture diagrams from project structure in multiple formats.

**Solves:** "I need to visualize my system architecture for documentation or team discussion"

**Input:** Project directory path
**Output:** Diagram code (Mermaid, PlantUML, or ASCII)

**Supported diagram types:**
- `component` - Shows modules and their relationships
- `layer` - Shows architectural layers (presentation, business, data)
- `deployment` - Shows deployment topology

**Usage:**
```bash
# Mermaid format (default)
python scripts/architecture_diagram_generator.py ./project --format mermaid --type component

# PlantUML format
python scripts/architecture_diagram_generator.py ./project --format plantuml --type layer

# ASCII format (terminal-friendly)
python scripts/architecture_diagram_generator.py ./project --format ascii

# Save to file
python scripts/architecture_diagram_generator.py ./project -o architecture.md
```

**Example output (Mermaid):**
```mermaid
graph TD
    A[API Gateway] --> B[Auth Service]
    A --> C[User Service]
    B --> D[(PostgreSQL)]
    C --> D
```

---

### 2. Dependency Analyzer

Analyzes project dependencies for coupling, circular dependencies, and outdated packages.

**Solves:** "I need to understand my dependency tree and identify potential issues"

**Input:** Project directory path
**Output:** Analysis report (JSON or human-readable)

**Analyzes:**
- Dependency tree (direct and transitive)
- Circular dependencies between modules
- Coupling score (0-100)
- Outdated packages

**Supported package managers:**
- npm/yarn (`package.json`)
- Python (`requirements.txt`, `pyproject.toml`)
- Go (`go.mod`)
- Rust (`Cargo.toml`)

**Usage:**
```bash
# Human-readable report
python scripts/dependency_analyzer.py ./project

# JSON output for CI/CD integration
python scripts/dependency_analyzer.py ./project --output json

# Check only for circular dependencies
python scripts/dependency_analyzer.py ./project --check circular

# Verbose mode with recommendations
python scripts/dependency_analyzer.py ./project --verbose
```

**Example output:**
```
Dependency Analysis Report
==========================
Total dependencies: 47 (32 direct, 15 transitive)
Coupling score: 72/100 (moderate)

Issues found:
- CIRCULAR: auth → user → permissions → auth
- OUTDATED: lodash 4.17.15 → 4.17.21 (security)

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