This 30-Year-Old Pattern Fixes AI Agents

Arcade: One API for all your agent auth: https://arcade.dev.plug.dev/LLbk9in In this video, I show how to apply classic three-tier architecture to agent systems so you can separate concerns across a data source layer (APIs, MCP servers, RAG), a processing layer (reasoning, orchestration, tools, memory), and a presentation layer (Docs, Slack, email, dashboards). I cover what to consider in each layer—freshness, auth, schemas, reliability; model selection, orchestration patterns, context, memory/state, and cost; plus output format, audience, timeliness, multi-channel delivery, and human-in-the-loop. I then walk through my open-source clinical trial tracker: an MCP server wrapping the clinicaltrials.gov API, a Google Sheets watch list, an orchestrated monitoring pipeline that generates an HTML email digest, and optional Linear tickets and a local web dashboard. I also explain how Arcade simplifies OAuth and authenticated tool access, and how the same layering works in a multi-agent setup. LINKS: https://arcade.dev.plug.dev/LLbk9in https://github.com/PromtEngineer/clinical_trial_tracker My Dictation App: www.whryte.com Website: https://engineerprompt.ai/ RAG Beyond Basics Course: https://prompt-s-site.thinkific.com/courses/rag Signup for Newsletter, localgpt: https://tally.so/r/3y9bb0 Let's Connect: 🦾 Discord: https://discord.com/invite/t4eYQRUcXB ☕ Buy me a Coffee: https://ko-fi.com/promptengineering |🔴 Patreon: https://www.patreon.com/PromptEngineering 💼Consulting: https://calendly.com/engineerprompt/consulting-call 📧 Business Contact: engineerprompt@gmail.com Become Member: http://tinyurl.com/y5h28s6h 💻 Pre-configured localGPT VM: https://bit.ly/localGPT (use Code: PromptEngineering for 50% off). Signup for Newsletter, localgpt: https://tally.so/r/3y9bb0 #Gemini3.1 #GoogleAI #Antigravity #AIStudio #VibeCoding #LLMBenchmarks #TechNews #SoftwareDevelopment #artificialintelligence