At OneFlowTech, we engineer enterprise-grade AI orchestration platforms built on a multi-tenant Next.js 14 App Router architecture, backed by PostgreSQL with pgvector for semantic retrieval and Redis-backed BullMQ for distributed job queues. Our agent runtime leverages a hybrid model-routing chain — DB-stored encrypted credentials, environment fallback, Claude CLI Max Plan subprocess, and local Ollama — coupled with EMA-based reinforcement learning (α=0.15) for skill confidence scoring. We implement strict tenant isolation through scoped UUID partitioning, RBAC approval workflows with 48-hour TTL, and Drizzle ORM migrations paired with raw SQL for triggers and RLS policies. Infrastructure runs on Docker Compose with Infisical-managed secrets, nginx reverse proxy, and automated LINE-pushed health monitoring every five minutes.