Analyze Codebase Architecture

Perform deep architectural analysis of the target component or feature (per the user's request) without cluttering the main context.

Analysis Goals

Investigate and document:

1. Component Structure
   • How is the target organized?
   • What are the main modules/files?
   • What patterns are being used?
2. Dependencies & Relationships
   • What does the target depend on?
   • What depends on the target?
   • Are there circular dependencies?
   • Are dependencies appropriately layered?
3. Data Flow
   • How does data flow through the target?
   • What are the inputs and outputs?
   • Where is state managed?
   • Are there side effects?
4. Design Patterns
   • What architectural patterns are used?
   • Are patterns applied consistently?
   • Are there anti-patterns present?
5. Potential Issues
   • Tight coupling between components?
   • Missing abstractions or too many abstractions?
   • Code duplication?
   • Complexity hotspots?

Investigation Steps

Step 1: Map the Territory

Use Glob to find all files related to the target:

# Find main component files
# Find tests
# Find documentation
# Find configuration

Step 2: Understand Key Files

Read the most important files:

• Entry points
• Core business logic
• Public APIs
• Type definitions

For each file, note:

• Purpose and responsibilities
• Key functions/classes
• Exports and imports

Step 3: Trace Dependencies

Use Grep to find:

• Import statements for the target
• References to key functions
• Test coverage

Create a dependency graph showing relationships.

Step 4: Analyze Patterns

Look for:

• Consistent patterns (good)
• Pattern violations (investigate why)
• Missing patterns (opportunities)
• Overused patterns (complexity)

Step 5: Generate Report

Output Format

Provide a comprehensive report:

Overview

• What is the target?
• What problem does it solve?
• Where does it fit in the larger system?

Architecture Diagram

[ASCII diagram showing component structure]

Component A
├── Sub-component B
├── Sub-component C
└── Sub-component D
    ├── Module E
    └── Module F

Key Components

For each major component:

• Purpose: What it does
• Location: File paths
• Dependencies: What it uses
• Dependents: What uses it
• Complexity: Lines of code, cyclomatic complexity if notable

Data Flow

Input → [Component A] → [Component B] → Output
          ↓
      [Side Effect]

Patterns Observed

• Pattern 1: Where it's used and why
• Pattern 2: Implementation details

Issues & Recommendations

Issues

1. Issue description
   • Impact: High/Medium/Low
   • Location: file.ts:123
   • Recommendation: Specific action

Opportunities

1. Improvement description
   • Benefit: What would improve
   • Approach: How to implement

Metrics

• Total files: X
• Total lines: Y
• Test coverage: Z%
• Key dependencies: List

Notes

• This skill runs in a forked context to avoid cluttering your main conversation
• It can read many files without impacting your working context
• Results are summarized and returned to you when analysis completes
• Use when you need deep investigation without disrupting current work