Running 5 Agents in Parallel on Antigravity: A Production Design for Decomposition, Conflict Resolution, and Merging

// Backend Agent proposes:
const backendProposal = {
  database: "MongoDB (NoSQL, ultra-fast)",
  caching: "Redis in-memory",
  encryption: "Optional - performance priority"
};
 
// Security Agent proposes:
const securityProposal = {
  database: "PostgreSQL (strong RBAC, auditing)",
  caching: "TLS-encrypted memcached",
  encryption: "Mandatory at-rest + in-transit"
};
 
// Resolution policy
const policy = {
  "performance_vs_security": {
    priority: "SECURITY_FIRST",
    rationale: "Data breach > performance degradation",
    resolution: securityProposal,
    optimization: "PostgreSQL + TLS Redis achieves both"
  }
};

// Frontend Agent:
const frontendChoice = {
  framework: "Next.js 15",
  state: "Zustand",
  testing: "Vitest"
};
 
// DevOps Agent (conservative):
const devopsChoice = {
  framework: "Create React App",
  state: "Redux",
  testing: "Jest"
};
 
// Context-aware resolution
const contextualResolver = {
  criteria: {
    project_stage: "startup",      // → new tech acceptable
    hosting: "Vercel available",   // → Next.js optimal
    team_expertise: "React heavy", // → Next.js familiar
    legacy_constraints: "none"     // → no technical debt
  },
  decision: frontendChoice // All criteria favor Next.js
};

// conflict-resolver.js
class ConflictResolver {
  constructor(policies = {}) {
    this.policies = policies;
    this.resolutionLog = [];
  }
 
  async resolve(agent1, proposal1, agent2, proposal2, context) {
    const conflictType = this.classifyConflict(proposal1, proposal2);
 
    console.log(`⚠️  Conflict: ${agent1.name} ↔ ${agent2.name}`);
    console.log(`   Type: ${conflictType}`);
 
    // Step 1: Apply policy if exists
    let resolution = this.applyPolicy(conflictType, proposal1, proposal2, context);
 
    // Step 2: Fallback to scoring if no policy
    if (!resolution) {
      resolution = await this.scoreAndCompare(proposal1, proposal2, context);
    }
 
    // Step 3: Log for audit trail
    this.resolutionLog.push({
      conflict_type: conflictType,
      agent1: agent1.name,
      agent2: agent2.name,
      resolution: resolution,
      timestamp: Date.now()
    });
 
    return resolution;
  }
 
  applyPolicy(type, prop1, prop2, context) {
    const policy = this.policies[type];
    if (!policy) return null;
 
    switch (policy.rule) {
      case "PRIORITY_A": return prop1;
      case "PRIORITY_B": return prop2;
      case "SECURITY_FIRST": return this.selectSecurer(prop1, prop2);
      case "CONTEXT_AWARE": return this.evaluateContext(prop1, prop2, context, policy.criteria);
    }
  }
 
  scoreAndCompare(prop1, prop2, context) {
    // Multi-dimensional scoring
    const weights = {
      ecosystem_maturity: 0.2,
      team_capability: 0.2,
      long_term_maintainability: 0.15,
      performance: 0.15,
      security: 0.2,
      cost: 0.1
    };
 
    const score1 = Object.entries(weights).reduce((sum, [dim, w]) => {
      return sum + (prop1[dim] || 0) * w;
    }, 0);
 
    const score2 = Object.entries(weights).reduce((sum, [dim, w]) => {
      return sum + (prop2[dim] || 0) * w;
    }, 0);
 
    return score1 > score2 ? prop1 : prop2;
  }
 
  classifyConflict(prop1, prop2) {
    const keys1 = Object.keys(prop1);
    const keys2 = Object.keys(prop2);
    const overlap = keys1.filter(k => keys2.includes(k));
 
    if (overlap.includes("performance") && overlap.includes("security"))
      return "performance_vs_security";
    if (overlap.includes("framework")) return "framework_choice";
    if (overlap.includes("cost")) return "cost_vs_performance";
 
    return "unknown_conflict";
  }
}

// validator.js
class ArtifactValidator {
  async validateMultiple(artifacts) {
    const results = {};
 
    for (const [source, artifact] of Object.entries(artifacts)) {
      results[source] = await this.validateArtifact(artifact);
    }
 
    return results;
  }
 
  async validateArtifact(artifact) {
    const checks = {
      syntax: await this.verifySyntax(artifact),
      dependencies: await this.checkDependencies(artifact),
      type_safety: await this.checkTypes(artifact),
      security: await this.auditSecurity(artifact),
      performance: await this.benchmarkPerformance(artifact)
    };
 
    const passed = Object.values(checks).every(c => c.ok);
 
    return {
      passed: passed,
      checks: checks,
      warnings: this.extractWarnings(checks),
      score: passed ? "A" : "F"
    };
  }
 
  async verifySyntax(artifact) {
    try {
      if (artifact.type === "javascript") {
        new Function(artifact.code);
      } else if (artifact.type === "json") {
        JSON.parse(artifact.content);
      }
      return { ok: true };
    } catch (e) {
      return { ok: false, error: e.message };
    }
  }
 
  async auditSecurity(artifact) {
    const issues = [];
 
    if (artifact.code?.includes("eval(")) issues.push("eval() usage");
    if (artifact.code?.includes("dangerouslySetInnerHTML")) issues.push("XSS risk");
    if (artifact.code?.match(/password\s*=\s*['"][^'"]+['"]/)) {
      issues.push("Hardcoded secret");
    }
 
    return { ok: issues.length === 0, issues };
  }
}

// merger.js
class SmartMerger {
  async merge(artifacts) {
    const categorized = this.categorizeByDomain(artifacts);
 
    const merged = {
      frontend: await this.mergeFrontendLayer(categorized.frontend),
      backend: await this.mergeBackendLayer(categorized.backend),
      infrastructure: await this.mergeInfraLayer(categorized.infrastructure),
      tests: await this.mergeTestLayer(categorized.tests)
    };
 
    await this.validateMerged(merged);
    return merged;
  }
 
  mergeFrontendLayer(frontendArtifacts) {
    // Combine React components, styles, assets
    const result = {
      components: {},
      styles: {},
      pages: {},
      utils: {}
    };
 
    for (const [source, artifact] of Object.entries(frontendArtifacts)) {
      result.components = this.deepMerge(result.components, artifact.components);
      result.styles = this.deepMerge(result.styles, artifact.styles);
    }
 
    return result;
  }
 
  deepMerge(target, source) {
    for (const [key, value] of Object.entries(source)) {
      if (target[key] && typeof target[key] === "object") {
        target[key] = this.deepMerge(target[key], value);
      } else if (target[key] && target[key] !== value) {
        console.warn(`⚠️  Merge conflict at ${key} - using newer value`);
        target[key] = value; // Override with newer
      } else {
        target[key] = value;
      }
    }
    return target;
  }
}

// production-workflow.js
const buildFullStackSaaS = async () => {
  console.log("🚀 Starting Full-Stack SaaS Build");
  console.log("📋 Project: Collaborative Note App (Notion-style)");
  console.log("⏱️  Target: 4 hours total (vs. 10 business days)\n");
 
  const agents = {
    frontend: await getAgent("UIComponentSpecialist"),
    backend: await getAgent("BackendArchitect"),
    database: await getAgent("DatabaseArchitect"),
    devops: await getAgent("DevOpsEngineer"),
    testing: await getAgent("QAAutomationMaster")
  };
 
  const startTime = Date.now();
 
  // Stage 1: Parallel execution (no dependencies)
  console.log("📌 Stage 1: Parallel Design & Architecture (30 min)\n");
 
  const [frontend, backend, database, devops, testing] = await Promise.all([
    agents.frontend.generate({
      spec: projectSpec,
      design: figmaLink,
      framework: "Next.js 15",
      styling: "Tailwind CSS v4"
    }),
 
    agents.backend.architect({
      spec: projectSpec,
      slas: { p99_latency: "< 100ms", availability: "99.9%" }
    }),
 
    agents.database.design({
      entities: ["users", "workspaces", "documents", "comments"],
      scale: "10M+ documents",
      compliance: "SOC2"
    }),
 
    agents.devops.configure({
      platform: "AWS",
      regions: ["us-east-1", "ap-southeast-1"],
      autoscaling: true,
      monitoring: "Datadog"
    }),
 
    agents.testing.strategize({
      coverage_target: 80,
      e2e_scenarios: [
        "user_signup",
        "create_document",
        "collaborative_edit",
        "share_workspace",
        "export_as_pdf"
      ]
    })
  ]);
 
  const parallelDuration = (Date.now() - startTime) / 1000 / 60;
  console.log(`✓ Stage 1 complete: ${parallelDuration.toFixed(1)} minutes\n`);
 
  // Stage 2: Validation
  console.log("🔍 Validation Phase\n");
  const validator = new ArtifactValidator();
  const validation = await validator.validateMultiple({
    frontend, backend, database, devops, testing
  });
 
  for (const [source, result] of Object.entries(validation)) {
    const status = result.passed ? "✓" : "✗";
    console.log(`${status} ${source}`);
  }
 
  // Stage 3: Merge
  console.log("\n🔗 Merging artifacts...\n");
  const merger = new SmartMerger();
  const merged = await merger.merge({
    frontend, backend, database, devops, testing
  });
 
  // Stage 4: Commit & Deploy
  console.log("📦 Committing to repository...");
  await git.commit({
    message: "feat: Full-stack SaaS v1.0 (5-agent parallel)",
    files: merged
  });
 
  console.log("🚀 Deploying to production...");
  const deployment = await deployToAWS(merged);
 
  const totalDuration = (Date.now() - startTime) / 1000 / 60;
  console.log(`\n✅ Complete! Duration: ${totalDuration.toFixed(1)} minutes`);
  console.log(`\n📊 Deliverables:`);
  console.log(`   Frontend: ${Object.keys(merged.frontend.components).length} components`);
  console.log(`   Backend: ${Object.keys(merged.backend.routes).length} API endpoints`);
  console.log(`   Database: ${Object.keys(merged.database.tables).length} tables`);
  console.log(`   Tests: ${Object.keys(merged.tests.scenarios).length} test scenarios`);
  console.log(`   🌍 Live at: ${deployment.url}`);
};
 
await buildFullStackSaaS();