Blog

Technical deep-dives, tutorials, and insights from the SYNTHESIS engineering team

Deep Dive December 10, 2025 12 min read

How SYNTHESIS Achieves 8+ Hours of Autonomous Coding

The UltraAutonomyEngine powers SYNTHESIS with unprecedented autonomous operation. Key innovations include automatic checkpoints every 3 minutes, a ContinuousLearningEngine that improves recovery strategies across sessions, and the FailurePredictionEngine that anticipates issues before they occur. The system supports four autonomy levels (ASSISTED, SEMI_AUTONOMOUS, FULLY_AUTONOMOUS, ULTRA_AUTONOMOUS) and implements 7 recovery actions: RETRY, ROLLBACK, SKIP, RESTART_COMPONENT, RESTART_AGENT, CHECKPOINT_RESTORE, and ESCALATE.

Miguel Rodriguez
Architecture December 8, 2025 15 min read

39 Specialized AI Agents: The Architecture Behind SYNTHESIS

Our MetaSupervisorEngine coordinates 39 agents including ArchitectAgent, FrontendAgent, BackendAgent, DatabaseAgent, EnhancedSecurityAgent, TestingAgent, DevOpsAgent, APIDesignAgent, PlanningAgent, and PerformanceAgent. The CircuitBreaker pattern prevents cascading failures with CLOSED, OPEN, and HALF_OPEN states, while parallel execution handles complex tasks across 14 capability domains.

Ana Martinez
Comparison December 5, 2025 10 min read

SYNTHESIS vs Cursor vs Replit Agent: Complete Comparison 2025

Honest side-by-side analysis: SYNTHESIS Pro at $9/month offers 8+ hours autonomous operation with 39 agents. Cursor Pro at $20/month provides 3 hours with 18 agents. Replit Agent at $25/month delivers 3 hours with 45 agents. We compare context windows, MCP integrations, model routing, and real-world performance across 50+ test projects.

Carlos Diaz
Tutorial December 3, 2025 8 min read

Building Production Apps with Vibe Coding

Learn the art of "vibe coding" - describing your application in natural language and letting SYNTHESIS build it. This tutorial walks through creating a complete SaaS with authentication, Stripe payments, and admin dashboard. The GoalDecomposition system breaks complex requests into TRIVIAL through VERY_COMPLEX sub-goals with automatic dependency detection and parallelization.

Laura Chen
Security December 1, 2025 11 min read

Security-First AI Development: How SYNTHESIS Protects Your Code

Our security suite includes 40+ automated tests covering SQL injection (DROP TABLE, UNION SELECT, encoded payloads), XSS prevention (script tags, javascript:, event handlers), and OWASP headers (CSP, HSTS, X-Frame-Options). The EnhancedSecurityAgent and SecurityManager detect suspicious patterns, block malicious IPs, and enforce rate limiting per endpoint.

David Park
Integration November 28, 2025 9 min read

MCP Protocol: The Future of AI Integrations

The Model Context Protocol enables seamless integration with 7 connectors: Stripe and PayPal for payments, Supabase for databases, GitHub for version control, SendGrid and Resend for email, and OpenAI for additional AI capabilities. The ConnectorRegistry provides automatic health checks, dynamic connection management, and unified tool discovery across all services.

James Wilson
Case Study November 25, 2025 7 min read

From Idea to Deployed App in One Night

A startup founder's journey using SYNTHESIS to build a complete marketplace application overnight. Starting at 9 PM with a natural language description, the system generated 47 files across React frontend, FastAPI backend, and PostgreSQL database. By 5 AM, the app was deployed on Cloudflare Pages with Stripe integration - all through autonomous operation with only 3 manual clarifications.

Sarah Kim
Engineering November 22, 2025 14 min read

Multi-Model AI Routing: Llama, Gemini, and DeepSeek Working Together

The ModelRouter intelligently selects from 12+ models across 4 providers: Groq (Llama 3.3 70B for speed), Google (Gemini 2.0 Flash, Gemini 1.5 Pro for vision), OpenRouter (DeepSeek R1 70B, Qwen 2.5 Coder 32B for code), and DeepSeek (Coder V2). Each request is scored for speed, quality, cost, and capability match, with automatic fallback chains and rate limit handling.

Robert Zhang