Vapora/examples/real-world/01-code-review-workflow.rs

//! # Real-World: Automated Code Review Pipeline
//!
//! Multi-agent code review with developer → reviewer → architect workflow.
//!
//! ## Business Problem
//! Review all pull requests within 2 hours, ensuring consistent quality standards.
//!
//! ## Solution Architecture
//! 1. Developer Agent: Code analysis (cheap model)
//! 2. Reviewer Agent: Quality assurance (mid-tier)
//! 3. Architect Agent: Design validation (premium)
//!
//! ## Cost Optimization
//! - Use Ollama for routine checks (free)
//! - GPT-4 for detailed review ($10/1M)
//! - Claude for architecture ($15/1M)
//!
//! ## Run
//! ```bash
//! cargo run --example 01-code-review-workflow
//! ```

fn main() {
    println!("=== Real-World: Automated Code Review Pipeline ===\n");

    println!("Business Goal: Review 50 PRs/day with consistent quality\n");

    // Phase 1: Initial code analysis (cheap)
    println!("Phase 1: Static Analysis (Ollama - Free)");
    println!("Tasks:");
    println!("  ✓ Lint & formatting checks");
    println!("  ✓ Dead code detection");
    println!("  ✓ Security rule violations");
    println!("Cost: $0.00 (local execution)");
    println!("Time: ~5 seconds/PR\n");

    // Phase 2: Code quality review (mid-tier)
    println!("Phase 2: Quality Review (GPT-4 - $10/1M tokens)");
    println!("Tasks:");
    println!("  ✓ Logic verification");
    println!("  ✓ Test coverage analysis");
    println!("  ✓ Performance implications");
    println!("Cost: ~$0.08/PR");
    println!("Time: ~15 seconds/PR\n");

    // Phase 3: Architecture validation (premium)
    println!("Phase 3: Architecture Review (Claude - $15/1M tokens)");
    println!("Only triggered for:");
    println!("  ✓ High-risk changes (10% of PRs)");
    println!("  ✓ New modules/services");
    println!("  ✓ Database schema changes");
    println!("Cost: ~$0.20/PR (for 10% of PRs)");
    println!("Time: ~30 seconds/PR\n");

    // Cost-benefit analysis
    println!("=== Economics ===");
    println!("Volume: 50 PRs/day");
    println!("Cost per PR: $0.012 average");
    println!("  = Phase 1 (free): $0.00");
    println!("  + Phase 2 (100%): $0.08");
    println!("  + Phase 3 (10%): $0.02");
    println!("Total daily cost: $0.60");
    println!("Total monthly cost: $12.00\n");

    println!("Manual review cost: ~$500/month (human time)");
    println!("Savings: $488/month + faster feedback\n");

    // Workflow example
    println!("=== Example: Single PR Review ===");
    println!("PR#1234: Add authentication module");
    println!("\n[1/3] Ollama - Static analysis");
    println!("  ✓ No lint errors");
    println!("  ✓ Test coverage: 92%");
    println!("  → Continue to next phase\n");

    println!("[2/3] GPT-4 - Quality review");
    println!("  ✓ Logic correct");
    println!("  ⚠ Missing error handling in 2 places");
    println!("  ⚠ Consider retry logic for failed auth\n");

    println!("[3/3] Claude - Architecture review (triggered: new module)");
    println!("  ✓ Design follows patterns");
    println!("  ✓ Security best practices applied");
    println!("  ✓ Approved for merge\n");

    println!("Result: PR approved with 2 suggestions");
    println!("Time: 50 seconds");
    println!("Cost: $0.28");
    println!("Human equivalent: 10+ minutes, $5+\n");

    println!("=== Results ===");
    println!("✓ 50 PRs reviewed daily");
    println!("✓ Consistent quality standards");
    println!("✓ 98% accuracy (matches human review)");
    println!("✓ 60+ minute feedback time (vs 2+ hours manual)");
    println!("✓ Cost: $12/month (vs $500+ manual)");
}