// Example analyzer configuration
interface CodeAnalyzerConfig {
  scanners: {
    eslint: {
      enabled: true;
      configPath: '.eslintrc.json';
      severity: 'warning' | 'error';
    };
    typecheck: {
      enabled: true;
      tsConfigPath: 'tsconfig.json';
    };
    customPatterns: {
      patterns: RegExp[];
      descriptions: string[];
    };
  };
  triggers: {
    onCommit: boolean;
    onPullRequest: boolean;
    scheduled: string; // cron expression
  };
  scope: {
    includePaths: string[];
    excludePaths: string[];
  };
}

// The analyzer runs and collects issues
const analysisResult = await analyzeCodebase({
  config: analyzerConfig,
  workingDirectory: process.cwd(),
});
// Result contains structured issue data
interface AnalysisResult {
  issues: CodeIssue[];
  summary: {
    totalIssues: number;
    byType: Record;
    bySeverity: Record;
  };
}

// Prompt generator creates context-rich instructions
interface ClaudePrompt {
  systemContext: string;
  issueDescription: string;
  relevantFiles: string[];
  suggestedApproach: string;
  testingRequirements: string;
  successCriteria: string[];
}

function generateClaudePrompt(issue: CodeIssue): ClaudePrompt {
  return {
    systemContext: 
      You are refactoring a ${issue.projectType} codebase.
      The code follows ${issue.styleGuide} conventions.
      Current tech stack: ${issue.dependencies.join(', ')}
    ,
    issueDescription: 
      Issue: ${issue.type} - ${issue.severity}
      File: ${issue.file}:${issue.line}

      ${issue.description}
      Current code:
      \\\${issue.language}
      ${issue.codeSnippet}
      \\\
    ,
    relevantFiles: issue.relatedFiles,
    suggestedApproach: issue.suggestedFix,
    testingRequirements: 
      - Ensure all existing tests pass
      - Add new tests for edge cases if needed
      - Verify no breaking changes in public API
    ,
    successCriteria: [
      'Code adheres to project style guide',
      'TypeScript types are accurate and complete',
      'No new ESLint warnings introduced',
      'Test coverage maintained or improved',
    ],
  };
}

The tool invokes Claude Code with generated prompt
claude code --prompt "$(generate_prompt issue_123)" \
  --files src/components/UserProfile.tsx src/types/user.ts \
  --test-before-commit \
  --commit-message-prefix "[automated-fix]"

// Post-execution validation ensures quality
interface ValidationResult {
  testsPass: boolean;
  typeCheckPass: boolean;
  lintPass: boolean;
  breakingChanges: BreakingChange[];
  diffSummary: {
    filesChanged: number;
    linesAdded: number;
    linesRemoved: number;
  };
}

async function validateChanges(
  commitHash: string
): Promise {
  return {
    testsPass: await runTests(),
    typeCheckPass: await runTypeCheck(),
    lintPass: await runLinter(),
    breakingChanges: await detectBreakingChanges(commitHash),
    diffSummary: await getDiffStats(commitHash),
  };
}

GitHub Actions example
name: Claude Code Enhancement
on:
  pull_request:
    types: [opened, synchronize]
  schedule:
    - cron: '0 2 * * 0' # Weekly Sunday 2 AM

jobs:
  enhance-code:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Run Code Analysis
        run: npm run analyze:code
      - name: Generate Claude Prompts
        run: npm run generate:prompts
      - name: Execute Claude Enhancements
        env:
          ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
        run: |
          for prompt in ./generated-prompts/*.md; do
            claude code --prompt-file "$prompt" --auto-commit
          done
      - name: Run Validation
        run: npm run validate:changes
      - name: Create Review PR
        if: success()
        uses: peter-evans/create-pull-request@v5
        with:
          title: '[Claude Enhancement] Automated Code Improvements'
          body: 'See commits for detailed changes'
          branch: claude-enhancement-${{ github.run_id }}

Install Claude Code CLI
npm install -g @anthropic/claude-code

Verify installation
claude code --version
Authenticate with API key
claude code auth --api-key YOUR_API_KEY

// .claude-enhance.json
{
  "analysisTools": {
    "eslint": {
      "enabled": true,
      "autoFix": true
    },
    "typescript": {
      "enabled": true,
      "strict": true
    },
    "customRules": [
      {
        "name": "consistent-error-handling",
        "pattern": "catch\\s*\\(\\s*error\\s*\\)\\s*{\\s*console\\.log",
        "message": "Replace console.log with proper error logging"
      }
    ]
  },
  "enhancement": {
    "autoCommit": false,
    "requireTests": true,
    "branchPrefix": "claude-enhance",
    "commitMessageTemplate": "[Enhancement] {description}"
  },
  "scope": {
    "include": ["src//*.ts", "src//*.tsx"],
    "exclude": ["/*.test.ts", "dist/", "node_modules/**"]
  }
}

Run analysis to identify enhancement opportunities
claude-enhance analyze --config .claude-enhance.json

Output shows categorized issues
Found 47 enhancement opportunities:
  - 12 TypeScript type improvements
  - 8 Error handling inconsistencies
  - 15 Refactoring opportunities
  - 7 Performance optimizations
  - 5 Documentation gaps

1. Analyze specific file or directory
claude-enhance analyze src/components/

2. Review suggested enhancements
claude-enhance list --severity high
3. Generate enhancement prompt for specific issue
claude-enhance prompt generate --issue-id ENH-042 > prompt.md
4. Review the generated prompt
cat prompt.md
5. Execute enhancement with Claude Code
claude code --prompt-file prompt.md --interactive
6. Review changes, run tests, commit
git diff
npm test
git commit -m "[Enhancement] Improve error handling in UserService"

Process all high-priority issues automatically
claude-enhance auto \
  --severity high \
  --max-issues 10 \
  --require-test-pass \
  --create-branch \
  --no-auto-merge

Claude processes each issue:
✓ ENH-042: Improved error handling in UserService
✓ ENH-051: Added missing TypeScript return types
✓ ENH-067: Refactored duplicate validation logic
✗ ENH-073: Skipped - tests failed after changes
✓ ENH-089: Optimized database query in getUserOrders
Review branch with all enhancements
git checkout claude-enhance-batch-1
git log --oneline

// src/services/UserService.ts
class UserService {
  async getUser(id: string) {
    try {
      const response = await fetch(/api/users/${id});
      const data = await response.json();
      return data;
    } catch (error) {
      console.log('Error fetching user:', error);
      return null;
    }
  }
}

// src/services/UserService.ts
class UserService {
  async getUser(id: string): Promise {
    try {
      const response = await fetch(/api/users/${id});

      if (!response.ok) {
        throw new UserServiceError(
          Failed to fetch user ${id}: ${response.status},
          { statusCode: response.status, userId: id }
        );
      }
      const data = await response.json();
      return this.validateUserData(data);
    } catch (error) {
      if (error instanceof UserServiceError) {
        logger.error('User fetch failed', {
          error,
          context: { userId: id },
        });
        throw error;
      }
      logger.error('Unexpected error in getUser', {
        error,
        context: { userId: id },
      });
      return null;
    }
  }
  private validateUserData(data: unknown): User {
    // Added runtime validation
    return UserSchema.parse(data);
  }
}

// Multiple files with duplicate validation logic
// src/components/SignupForm.tsx
function validateEmail(email: string): boolean {
  const re = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
  return re.test(email);
}

// src/components/ProfileEditor.tsx
function validateEmail(email: string): boolean {
  const re = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
  return re.test(email);
}
// src/utils/contactForm.ts
function isValidEmail(email: string): boolean {
  const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
  return emailRegex.test(email);
}

// src/utils/validation.ts - New centralized validation
import { z } from 'zod';

export const EmailSchema = z.string().email();
export function validateEmail(email: string): boolean {
  return EmailSchema.safeParse(email).success;
}
export function validateEmailWithDetails(email: string): {
  valid: boolean;
  error?: string;
} {
  const result = EmailSchema.safeParse(email);
  return {
    valid: result.success,
    error: result.success ? undefined : result.error.message,
  };
}
// src/components/SignupForm.tsx
import { validateEmail } from '@/utils/validation';
// Now uses centralized validation
// src/components/ProfileEditor.tsx
import { validateEmail } from '@/utils/validation';
// Now uses centralized validation
// src/utils/contactForm.ts
import { validateEmail } from '@/utils/validation';
// Now uses centralized validation

// Claude generates comprehensive tests for untested code
// src/services/UserService.test.ts
import { describe, it, expect, vi, beforeEach } from 'vitest';
import { UserService } from './UserService';
import { UserServiceError } from './errors';

describe('UserService', () => {
  let userService: UserService;
  let mockFetch: ReturnType;
  beforeEach(() => {
    mockFetch = vi.fn();
    global.fetch = mockFetch;
    userService = new UserService();
  });
  describe('getUser', () => {
    it('should fetch and return user data successfully', async () => {
      const mockUser = { id: '123', name: 'John Doe', email: 'john@example.com' };
      mockFetch.mockResolvedValueOnce({
        ok: true,
        json: async () => mockUser,
      });
      const result = await userService.getUser('123');
      expect(result).toEqual(mockUser);
      expect(mockFetch).toHaveBeenCalledWith('/api/users/123');
    });
    it('should throw UserServiceError on non-200 response', async () => {
      mockFetch.mockResolvedValueOnce({
        ok: false,
        status: 404,
      });
      await expect(userService.getUser('999'))
        .rejects.toThrow(UserServiceError);
    });
    it('should return null on unexpected errors', async () => {
      mockFetch.mockRejectedValueOnce(new Error('Network error'));
      const result = await userService.getUser('123');
      expect(result).toBeNull();
    });
    it('should validate user data format', async () => {
      mockFetch.mockResolvedValueOnce({
        ok: true,
        json: async () => ({ invalid: 'data' }),
      });
      await expect(userService.getUser('123'))
        .rejects.toThrow('Invalid user data');
    });
  });
});

// Phase 1: Analysis and Planning
interface RefactoringPlan {
  phases: RefactoringPhase[];
  dependencies: Map;
  riskAssessment: RiskLevel;
}
const migrationPlan = await claudeEnhance.planRefactoring({
  goal: 'Migrate from Redux to Zustand',
  scope: 'src/store/**',
  constraints: {
    breakingChanges: 'minimize',
    testCoverage: 'maintain-or-improve',
    performanceImpact: 'neutral-or-positive',
  },
});
// Phase 2: Incremental Execution
for (const phase of migrationPlan.phases) {
  await claudeEnhance.executePhase(phase, {
    createBranch: true,
    runTests: true,
    requireReview: phase.risk === 'high',
  });
  // Human checkpoint for high-risk phases
  if (phase.risk === 'high') {
    await waitForHumanApproval(phase);
  }
}

// architectural-rules.ts
export const architecturalRules = {
  'consistent-api-client': {
    pattern: 'All API calls must use centralized ApiClient',
    detector: (file: SourceFile) => {
      return file.text.includes('fetch(') || file.text.includes('axios.get');
    },
    fix: async (file: SourceFile) => {
      return claudeCode.execute({
        task: 'Refactor direct fetch/axios calls to use ApiClient',
        files: [file.path],
        constraints: [
          'Import ApiClient from @/services/ApiClient',
          'Preserve existing error handling patterns',
          'Add appropriate type annotations',
        ],
      });
    },
  },
  'proper-error-boundaries': {
    pattern: 'React components with data fetching need error boundaries',
    detector: (file: SourceFile) => {
      const hasDataFetching = /useQuery|useSWR|fetch/.test(file.text);
      const hasErrorBoundary = /ErrorBoundary|componentDidCatch/.test(file.text);
      return hasDataFetching && !hasErrorBoundary;
    },
    fix: async (file: SourceFile) => {
      return claudeCode.execute({
        task: 'Wrap data-fetching component with ErrorBoundary',
        files: [file.path],
        context: 'Use existing ErrorBoundary from @/components/ErrorBoundary',
      });
    },
  },
};

// Performance analyzer identifies optimization opportunities
interface PerformanceIssue {
  type: 'bundle-size' | 'render-performance' | 'memory-leak' | 'network';
  severity: 'low' | 'medium' | 'high' | 'critical';
  component: string;
  impact: string;
  suggestedFix: string;
}
const perfAudit = await claudeEnhance.analyzePerformance({
  entry: 'src/main.tsx',
  targets: {
    bundleSize: '< 500kb',
    firstContentfulPaint: '< 1.5s',
    timeToInteractive: '< 3.5s',
  },
});
// Claude generates optimizations
for (const issue of perfAudit.issues) {
  if (issue.severity === 'critical' || issue.severity === 'high') {
    await claudeCode.optimize({
      issue,
      techniques: [
        'code-splitting',
        'lazy-loading',
        'memoization',
        'virtualization',
      ],
      measureImpact: true,
    });
  }
}

// Component with performance issues
function UserDashboard({ userId }: Props) {
  const users = useUsers(); // Fetches all users
  const currentUser = users.find(u => u.id === userId);

  return (
    

      
      
       {/* Renders 10,000 users */}
    
  );
}

// Optimized version
function UserDashboard({ userId }: Props) {
  // Fetch only needed user data
  const { data: currentUser } = useUser(userId);
  const { data: activities } = useUserActivities(userId, { limit: 50 });

  return (
    

      
      
      }>
         {/* Lazy-loaded with virtualization */}
      
    
  );
}

// Separate component for virtualized list
const LazyUserList = lazy(() => import('./UserList').then(module => ({
  default: () => (
    
  ),
})));

// Security analyzer configuration
const securityRules = {
  'no-sensitive-data-logging': {
    pattern: /console\.log.*password|console\.log.*token|console\.log.*secret/gi,
    severity: 'critical',
    fix: 'Remove or redact sensitive data from logs',
  },
  'sql-injection-risk': {
    pattern: /db\.query\(.*\${.*}\)|db\.execute\(.*\${.*}\)/gi,
    severity: 'critical',
    fix: 'Use parameterized queries instead of string interpolation',
  },
  'xss-vulnerability': {
    pattern: /dangerouslySetInnerHTML|innerHTML\s*=/gi,
    severity: 'high',
    fix: 'Use safe rendering methods or sanitize input',
  },
};
// Claude automatically fixes security issues
await claudeEnhance.fixSecurityIssues({
  rules: securityRules,
  autoCommit: false, // Require human review for security changes
  createSeparatePRs: true,
});

async function getUser(userId: string) {
  const query = SELECT * FROM users WHERE id = '${userId}';
  return db.query(query);
}

async function getUser(userId: string) {
  const query = 'SELECT * FROM users WHERE id = ?';
  return db.query(query, [userId]);
}

Effective Enhancement Prompt Template
Project Context
•Framework: [Next.js 15, React 19]
•TypeScript: [Strict mode enabled]
•Style Guide: [Airbnb, Prettier]
•Testing Framework: [Vitest, React Testing Library]
Issue Description
[Clear description of what needs improvement]
Current Code
[Relevant code snippets with file paths]
Desired Outcome
[Specific goals for the enhancement]
Constraints
•Maintain backward compatibility
•Preserve existing test coverage
•Follow established patterns in [specific files]
Success Criteria
•[ ] All tests pass
•[ ] TypeScript compiles without errors
•[ ] ESLint shows no new warnings
•[ ] Performance metrics maintained or improved

// Include architecture documentation in prompts
const enhancementPrompt = generatePrompt({
  issue: codeIssue,
  context: {
    architecture: readFile('docs/ARCHITECTURE.md'),
    conventions: readFile('docs/CONVENTIONS.md'),
    relatedFiles: getRelatedFiles(codeIssue.file),
  },
});

enum TrustLevel {
  FullyAutomated = 'fully-automated',
  AutoWithReview = 'auto-with-review',
  RequiresApproval = 'requires-approval',
}
const enhancementPolicy = {
  documentation: TrustLevel.FullyAutomated,
  testAddition: TrustLevel.FullyAutomated,
  refactoring: TrustLevel.AutoWithReview,
  apiChanges: TrustLevel.RequiresApproval,
  securityFixes: TrustLevel.RequiresApproval,
};
async function executeEnhancement(issue: CodeIssue) {
  const trustLevel = enhancementPolicy[issue.category];
  const changes = await claudeCode.execute(issue);
  switch (trustLevel) {
    case TrustLevel.FullyAutomated:
      await autoMerge(changes);
      break;
    case TrustLevel.AutoWithReview:
      await createReviewPR(changes);
      break;
    case TrustLevel.RequiresApproval:
      await requestHumanApproval(changes);
      break;
  }
}

interface ValidationPipeline {
  stages: ValidationStage[];
}
const validationPipeline: ValidationPipeline = {
  stages: [
    {
      name: 'Static Analysis',
      checks: [
        'typescript-compile',
        'eslint',
        'prettier-check',
      ],
    },
    {
      name: 'Test Suite',
      checks: [
        'unit-tests',
        'integration-tests',
        'e2e-tests',
      ],
    },
    {
      name: 'Performance Regression',
      checks: [
        'bundle-size-check',
        'lighthouse-audit',
      ],
    },
    {
      name: 'Security Scan',
      checks: [
        'dependency-audit',
        'secret-detection',
        'sast-scan',
      ],
    },
  ],
};
async function validateEnhancement(changes: Changes): Promise {
  for (const stage of validationPipeline.stages) {
    const stageResult = await runValidationStage(stage, changes);
    if (!stageResult.passed) {
      await revertChanges(changes);
      await notifyDevelopers(stageResult.failures);
      return false;
    }
  }
  return true;
}

// Phase 1: Low-Risk Automation (Weeks 1-2)
const phase1 = {
  automatedTasks: [
    'Fix formatting issues',
    'Add missing JSDoc comments',
    'Update deprecated API usage',
    'Fix simple linting errors',
  ],
  humanReview: 'all-changes',
};
// Phase 2: Expanded Automation (Weeks 3-4)
const phase2 = {
  automatedTasks: [
    ...phase1.automatedTasks,
    'Add missing test cases',
    'Refactor duplicate code',
    'Improve error handling',
  ],
  humanReview: 'refactoring-only',
};
// Phase 3: Full Automation (Week 5+)
const phase3 = {
  automatedTasks: [
    ...phase2.automatedTasks,
    'Performance optimizations',
    'Architectural improvements',
  ],
  humanReview: 'spot-checks',
};

Claude Enhancement Guide for Our Team
What Gets Automated
•Documentation updates
•Test coverage improvements
•Code formatting and style fixes
•Refactoring duplicate code
•TypeScript type improvements
What Requires Review
•Public API changes
•Database schema modifications
•Security-related changes
•Performance optimizations affecting critical paths
How to Review AI Changes
1. Check the generated commit message for clarityCheck the generated commit message for clarity
2. Review the diff for logical correctnessReview the diff for logical correctness
3. Verify tests pass and coverage is maintainedVerify tests pass and coverage is maintained
4. Ensure changes follow our architectural patternsEnsure changes follow our architectural patterns
5. Approve or request changes as you would for human PRsApprove or request changes as you would for human PRs
Providing Feedback
If AI changes need improvement, provide specific feedback:
•"This refactoring broke the error handling pattern we use"
•"Add tests for the edge case when userId is null"
•"Follow the naming convention established in UserService.ts"

interface EnhancementMetrics {
  period: string;
  totalEnhancements: number;
  autoMerged: number;
  requiredChanges: number;
  reverted: number;
  avgReviewTime: number;
  impactMetrics: {
    bugsPrevented: number;
    testCoverageGain: number;
    performanceImprovements: string[];
  };
}
async function generateEnhancementReport(): Promise {
  const enhancements = await fetchEnhancements(last30Days);
  return {
    period: 'Last 30 days',
    totalEnhancements: enhancements.length,
    autoMerged: enhancements.filter(e => e.status === 'auto-merged').length,
    requiredChanges: enhancements.filter(e => e.status === 'changes-requested').length,
    reverted: enhancements.filter(e => e.status === 'reverted').length,
    avgReviewTime: calculateAvgReviewTime(enhancements),
    impactMetrics: {
      bugsPrevented: countPreventedBugs(enhancements),
      testCoverageGain: calculateCoverageGain(enhancements),
      performanceImprovements: listPerformanceGains(enhancements),
    },
  };
}

// Optimal workflow combines both
const codeQualityPipeline = [
  // 1. Fast automated fixes
  runPrettier,
  runESLintAutoFix,
  // 2. Identify complex issues
  runESLintAnalysis,
  runSonarQubeAnalysis,
  // 3. Claude enhances what rules can't fix
  generateClaudePromptsForComplexIssues,
  executeClaudeEnhancements,
  // 4. Validate results
  runFullTestSuite,
  runSecurityScans,
];

Claude Enhancement: Automated background improvements in CI/CD
Cursor: Interactive development with AI pair programming

Combined workflow:
1. Develop features using Cursor's AI assistanceDevelop features using Cursor's AI assistance
2. Push to repositoryPush to repository
3. Claude Enhancement analyzes and suggests improvementsClaude Enhancement analyzes and suggests improvements
4. Review enhancement PR in your preferred editorReview enhancement PR in your preferred editor

// High-risk code requires human oversight
const riskAssessment = {
  payment: 'human-required',
  authentication: 'human-required',
  dataEncryption: 'human-required',
  publicAPI: 'human-review',
  internalRefactoring: 'ai-automated',
  documentation: 'ai-automated',
};
function shouldRequireHumanReview(change: CodeChange): boolean {
  const affectedAreas = detectAffectedAreas(change);
  return affectedAreas.some(area =>
    riskAssessment[area] !== 'ai-automated'
  );
}

// Calculate enhancement costs
interface CostAnalysis {
  monthlyAPIUsage: {
    inputTokens: number;
    outputTokens: number;
    totalCost: number;
  };
  developerTimeSaved: {
    hoursPerMonth: number;
    costSavings: number;
  };
  netBenefit: number;
}
// Example: Medium-sized team (10 developers)
const costAnalysis: CostAnalysis = {
  monthlyAPIUsage: {
    inputTokens: 10_000_000, // ~$30
    outputTokens: 5_000_000, // ~$75
    totalCost: 105, // Claude API costs
  },
  developerTimeSaved: {
    hoursPerMonth: 80, // 8 hours/developer
    costSavings: 8000, // Assuming $100/hour
  },
  netBenefit: 7895, // $8000 - $105
};

// Configure data handling policies
const privacyConfig = {
  excludePatterns: [
    '**/.env',
    '**/secrets.json',
    '/private-keys/',
    '/credentials/',
  ],
  redactPatterns: [
    /API_KEY=.*/gi,
    /password\s*=\s*['"][^'"]+['"]/gi,
  ],
  useLocalPreprocessing: true,
};
// Preprocess files before sending to API
async function prepareForClaudeAnalysis(files: string[]) {
  const sanitizedFiles = await Promise.all(
    files.map(async file => {
      let content = await readFile(file);
      // Redact sensitive patterns
      for (const pattern of privacyConfig.redactPatterns) {
        content = content.replace(pattern, '[REDACTED]');
      }
      return { path: file, content };
    })
  );
  return sanitizedFiles;
}