Understanding Output

Chapter Status: ✅ 100% Working

Last updated: 2025-09-08
PMAT version: pmat 2.63.0

Output Formats

PMAT supports multiple output formats to integrate with your workflow:

JSON Format (Default)

Structured data for programmatic use:

pmat analyze . --format json

{
  "timestamp": "2025-09-08T10:30:00Z",
  "version": "2.63.0",
  "repository": {
    "path": "/workspace/project",
    "vcs": "git",
    "branch": "main"
  },
  "summary": {
    "total_files": 156,
    "total_lines": 12847,
    "total_functions": 342,
    "total_classes": 48
  },
  "languages": {
    "Python": {
      "files": 89,
      "lines": 8234,
      "percentage": 64.1
    }
  },
  "metrics": {
    "complexity": {
      "cyclomatic": {
        "average": 3.4,
        "median": 2.0,
        "p95": 12.0,
        "max": 28.0
      }
    }
  }
}

Markdown Format

Human-readable reports:

pmat analyze . --format markdown

# Repository Analysis Report

**Date**: 2025-09-08  
**Repository**: /workspace/project  
**PMAT Version**: 2.63.0

## Summary
- **Total Files**: 156
- **Total Lines**: 12,847
- **Primary Language**: Python (64.1%)

## Quality Grade: B+
Overall Score: 82.5/100

### Breakdown
| Metric | Score | Grade |
|--------|-------|-------|
| Complexity | 85 | B+ |
| Duplication | 90 | A- |
| Documentation | 75 | C+ |

HTML Format

Interactive web reports:

pmat analyze . --format html > report.html

Features:

• Interactive charts
• Drill-down capabilities
• Exportable visualizations
• Team sharing ready

CSV Format

For spreadsheet analysis:

pmat analyze . --format csv

file_path,language,lines,complexity,duplication,documentation
src/main.py,Python,234,3.2,0.02,0.85
src/utils.py,Python,156,2.1,0.00,0.92

SARIF Format

For IDE and CI/CD integration:

pmat analyze . --format sarif

Compatible with:

• GitHub Code Scanning
• Visual Studio Code
• Azure DevOps
• GitLab

Key Metrics Explained

Complexity Metrics

Cyclomatic Complexity: Number of independent paths through code

• 1-4: Simple, low risk
• 5-7: Moderate complexity
• 8-10: Complex, needs attention
• 11+: Very complex, refactor recommended

Cognitive Complexity: How hard code is to understand

• Penalizes nested structures
• Rewards linear flow
• Better predictor of maintainability

Duplication Metrics

Type-1 (Exact): Identical code blocks

# Found in file1.py and file2.py
def calculate_tax(amount):
    return amount * 0.08

Type-2 (Renamed): Same structure, different names

# file1.py
def calc_tax(amt):
    return amt * 0.08

# file2.py  
def compute_tax(value):
    return value * 0.08

Type-3 (Modified): Similar with changes

# file1.py
def calc_tax(amt):
    return amt * 0.08

# file2.py
def calc_tax(amt, rate=0.08):
    return amt * rate

Type-4 (Semantic): Different code, same behavior

# file1.py
sum([1, 2, 3])

# file2.py
result = 0
for n in [1, 2, 3]:
    result += n

Quality Grades

PMAT uses academic-style grading:

Understanding Recommendations

PMAT provides actionable recommendations:

Priority Levels

{
  "recommendations": [
    {
      "priority": "HIGH",
      "type": "complexity",
      "message": "Refactor function 'process_data' (complexity: 28)",
      "location": "src/processor.py:142",
      "effort": "2 hours"
    },
    {
      "priority": "MEDIUM",
      "type": "duplication",
      "message": "Extract common code into shared function",
      "locations": ["src/a.py:20", "src/b.py:45"],
      "effort": "30 minutes"
    },
    {
      "priority": "LOW",
      "type": "documentation",
      "message": "Add docstring to 'helper_function'",
      "location": "src/utils.py:88",
      "effort": "5 minutes"
    }
  ]
}

Acting on Recommendations

High Priority: Address immediately

• Security vulnerabilities
• Critical complexity
• Major duplication

Medium Priority: Plan for next sprint

• Moderate complexity
• Documentation gaps
• Minor duplication

Low Priority: Continuous improvement

• Style issues
• Nice-to-have documentation
• Micro-optimizations

Filtering and Focusing Output

Focus on Specific Metrics

# Only show complexity issues
pmat analyze . --metrics complexity

# Only show duplication
pmat analyze . --metrics duplication

# Multiple metrics
pmat analyze . --metrics "complexity,documentation"

Filter by Severity

# Only high-priority issues
pmat analyze . --severity high

# High and medium
pmat analyze . --severity "high,medium"

Language-Specific Analysis

# Only analyze Python files
pmat analyze . --languages python

# Multiple languages
pmat analyze . --languages "python,javascript"

Integration Examples

VS Code Integration

// .vscode/tasks.json
{
  "version": "2.0.0",
  "tasks": [
    {
      "label": "PMAT Analysis",
      "type": "shell",
      "command": "pmat analyze . --format sarif > pmat.sarif",
      "problemMatcher": "$pmat"
    }
  ]
}

Git Pre-Push Hook

#!/bin/bash
# .git/hooks/pre-push
GRADE=$(pmat analyze . --format json | jq -r '.grade')
if [[ "$GRADE" < "B" ]]; then
  echo "Warning: Code quality grade $GRADE is below B"
  read -p "Continue push? (y/n) " -n 1 -r
  echo
  if [[ ! $REPLY =~ ^[Yy]$ ]]; then
    exit 1
  fi
fi

Next Steps

Now that you understand PMAT’s output, explore:

• Chapter 2: Core Concepts - Deep dive into analysis
• Chapter 3: MCP Protocol - AI agent integration
• Chapter 4: Advanced Features - TDG and similarity detection