Code Review Ai Ai Review

Context

Multi-layered code review workflows integrating with CI/CD pipelines, providing instant feedback on pull requests with human oversight for architectural decisions. Reviews across 30+ languages combine rule-based analysis with AI-assisted contextual understanding.

Requirements

Review: $ARGUMENTS

Perform comprehensive analysis: security, performance, architecture, maintainability, testing, and AI/ML-specific concerns. Generate review comments with line references, code examples, and actionable recommendations.

Automated Code Review Workflow

Initial Triage

1. Parse diff to determine modified files and affected components
2. Match file types to optimal static analysis tools
3. Scale analysis based on PR size (superficial >1000 lines, deep <200 lines)
4. Classify change type: feature, bug fix, refactoring, or breaking change

Multi-Tool Static Analysis

Execute in parallel:

• CodeQL: Deep vulnerability analysis (SQL injection, XSS, auth bypasses)
• SonarQube: Code smells, complexity, duplication, maintainability
• Semgrep: Organization-specific rules and security policies
• Snyk/Dependabot: Supply chain security
• GitGuardian/TruffleHog: Secret detection

AI-Assisted Review

# Context-aware review prompt for Claude 4.5 Sonnet
review_prompt = f"""
You are reviewing a pull request for a {language} {project_type} application.

**Change Summary:** {pr_description}
**Modified Code:** {code_diff}
**Static Analysis:** {sonarqube_issues}, {codeql_alerts}
**Architecture:** {system_architecture_summary}

Focus on:
1. Security vulnerabilities missed by static tools
2. Performance implications at scale
3. Edge cases and error handling gaps
4. API contract compatibility
5. Testability and missing coverage
6. Architectural alignment

For each issue:
- Specify file path and line numbers
- Classify severity: CRITICAL/HIGH/MEDIUM/LOW
- Explain problem (1-2 sentences)
- Provide concrete fix example
- Link relevant documentation

Format as JSON array.
"""

Model Selection (2025)

• Fast reviews (<200 lines): GPT-4o-mini or Claude 4.5 Haiku
• Deep reasoning: Claude 4.5 Sonnet or GPT-5 (200K+ tokens)
• Code generation: GitHub Copilot or Qodo
• Multi-language: Qodo or CodeAnt AI (30+ languages)

Review Routing

interface ReviewRoutingStrategy {
  async routeReview(pr: PullRequest): Promise<ReviewEngine> {
    const metrics = await this.analyzePRComplexity(pr);

    if (metrics.filesChanged > 50 || metrics.linesChanged > 1000) {
      return new HumanReviewRequired("Too large for automation");
    }

    if (metrics.securitySensitive || metrics.affectsAuth) {
      return new AIEngine("claude-3.7-sonnet", {
        temperature: 0.1,
        maxTokens: 4000,
        systemPrompt: SECURITY_FOCUSED_PROMPT
      });
    }

    if (metrics.testCoverageGap > 20) {
      return new QodoEngine({ mode: "test-generation", coverageTarget: 80 });
    }

    return new AIEngine("gpt-4o", { temperature: 0.3, maxTokens: 2000 });
  }
}

Architecture Analysis

Architectural Coherence

1. Dependency Direction: Inner layers don't depend on outer layers
2. SOLID Principles:
   • Single Responsibility, Open/Closed, Liskov Substitution
   • Interface Segregation, Dependency Inversion
3. Anti-patterns:
   • Singleton (global state), God objects (>500 lines, >20 methods)
   • Anemic models, Shotgun surgery

Microservices Review

type MicroserviceReviewChecklist struct {
    CheckServiceCohesion       bool  // Single capability per service?
    CheckDataOwnership         bool  // Each service owns database?
    CheckAPIVersioning         bool  // Semantic versioning?
    CheckBackwardCompatibility bool  // Breaking changes flagged?
    CheckCircuitBreakers       bool  // Resilience patterns?
    CheckIdempotency           bool  // Duplicate event handling?
}

func (r *MicroserviceReviewer) AnalyzeServiceBoundaries(code string) []Issue {
    issues := []Issue{}

    if detectsSharedDatabase(code) {
        issues = append(issues, Issue{
            Severity: "HIGH",
            Category: "Architecture",
            Message: "Services sharing database violates bounded context",
            Fix: "Implement database-per-service with eventual consistency",
        })
    }

    if hasBreakingAPIChanges(code) && !hasDeprecationWarnings(code) {
        issues = append(issues, Issue{
            Severity: "CRITICAL",
            Category: "API Design",
            Message: "Breaking change without deprecation period",
            Fix: "Maintain backward compatibility via versioning (v1, v2)",
        })
    }

    return issues
}

Security Vulnerability Detection

Multi-Layered Security

SAST Layer: CodeQL, Semgrep, Bandit/Brakeman/Gosec

AI-Enhanced Threat Modeling:

security_analysis_prompt = """
Analyze authentication code for vulnerabilities:
{code_snippet}

Check for:
1. Authentication bypass, broken access control (IDOR)
2. JWT token validation flaws
3. Session fixation/hijacking, timing attacks
4. Missing rate limiting, insecure password storage
5. Credential stuffing protection gaps

Provide: CWE identifier, CVSS score, exploit scenario, remediation code
"""

findings = claude.analyze(security_analysis_prompt, temperature=0.1)

Secret Scanning:

trufflehog git file://. --json | \
  jq '.[] | select(.Verified == true) | {
    secret_type: .DetectorName,
    file: .SourceMetadata.Data.Filename,
    severity: "CRITICAL"
  }'

OWASP Top 10 (2025)

1. A01 - Broken Access Control: Missing authorization, IDOR
2. A02 - Cryptographic Failures: Weak hashing, insecure RNG
3. A03 - Injection: SQL, NoSQL, command injection via taint analysis
4. A04 - Insecure Design: Missing threat modeling
5. A05 - Security Misconfiguration: Default credentials
6. A06 - Vulnerable Components: Snyk/Dependabot for CVEs
7. A07 - Authentication Failures: Weak session management
8. A08 - Data Integrity Failures: Unsigned JWTs
9. A09 - Logging Failures: Missing audit logs
10. A10 - SSRF: Unvalidated user-controlled URLs

Performance Review

Performance Profiling

class PerformanceReviewAgent {
  async analyzePRPerformance(prNumber) {
    const baseline = await this.loadBaselineMetrics('main');
    const prBranch = await this.runBenchmarks(`pr-${prNumber}`);

    const regressions = this.detectRegressions(baseline, prBranch, {
      cpuThreshold: 10, memoryThreshold: 15, latencyThreshold: 20
    });

    if (regressions.length > 0) {
      await this.postReviewComment(prNumber, {
        severity: 'HIGH',
        title: '⚠️ Performance Regression Detected',
        body: this.formatRegressionReport(regressions),
        suggestions: await this.aiGenerateOptimizations(regressions)
      });
    }
  }
}

Scalability Red Flags

• N+1 Queries, Missing Indexes, Synchronous External Calls
• In-Memory State, Unbounded Collections, Missing Pagination
• No Connection Pooling, No Rate Limiting

def detect_n_plus_1_queries(code_ast):
    issues = []
    for loop in find_loops(code_ast):
        db_calls = find_database_calls_in_scope(loop.body)
        if len(db_calls) > 0:
            issues.append({
                'severity': 'HIGH',
                'line': loop.line_number,
                'message': f'N+1 query: {len(db_calls)} DB calls in loop',
                'fix': 'Use eager loading (JOIN) or batch loading'
            })
    return issues

Review Comment Generation

Structured Format

interface ReviewComment {
  path: string; line: number;
  severity: 'CRITICAL' | 'HIGH' | 'MEDIUM' | 'LOW' | 'INFO';
  category: 'Security' | 'Performance' | 'Bug' | 'Maintainability';
  title: string; description: string;
  codeExample?: string; references?: string[];
  autoFixable: boolean; cwe?: string; cvss?: number;
  effort: 'trivial' | 'easy' | 'medium' | 'hard';
}

const comment: ReviewComment = {
  path: "src/auth/login.ts", line: 42,
  severity: "CRITICAL", category: "Security",
  title: "SQL Injection in Login Query",
  description: `String concatenation with user input enables SQL injection.
**Attack Vector:** Input 'admin' OR '1'='1' bypasses authentication.
**Impact:** Complete auth bypass, unauthorized access.`,
  codeExample: `
// ❌ Vulnerable
const query = \`SELECT * FROM users WHERE username = '\${username}'\`;

// ✅ Secure
const query = 'SELECT * FROM users WHERE username = ?';
const result = await db.execute(query, [username]);
  `,
  references: ["https://cwe.mitre.org/data/definitions/89.html"],
  autoFixable: false, cwe: "CWE-89", cvss: 9.8, effort: "easy"
};

CI/CD Integration

GitHub Actions