My Top 20 Lessons from Building 100s of AI Agents (Super Actionable)

Cole Medin August 21, 2025
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Cole Medin

@colemedin

About

Hi I'm Cole Medin and I'm your guy for learning how to make a huge impact with AI agents and AI coding assistants. AI is no doubt the future of not just software development but the whole world. And I'm on a mission to master it and share everything with you. Join me as I push the limits of what is possible with AI. I'll be uploading videos weekly - at least every Wednesday at 7:00 PM CDT!

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I've built hundreds of AI agents over the past couple of years and learned MANY lessons through doing so - a lot of them the hard way. I put a ton of effort into condensing all of these lessons in the top 20 for you so that you can learn from my grind and my mistakes. The goal here is to save you dozens if not hundreds of hours learning them all yourself like I had to do! This content is from one of the special Dynamous Launch Week events and is super value packed and actionable. I'm releasing this on my YouTube channel in celebration of the Archon Beta launch and reaching 1,000 members this weekend in the Dynamous community! I hope you get a lot out of this and let me know in the comments if you want me to make a full video on any of the lessons or tips I cover here! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - If you're looking for an AI coding assistant that's fast, feature rich, and can handle complex coding problems, check out Windsurf: https://wind.surf/colemedin - If you're looking to join a community for early AI adopters to master AI Coding & AI Agents and transform your career or business, check out Dynamous: https://dynamous.ai ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 00:00 - Introducing my Top 20 Agent Lessons 00:43 - Gameplan for the Event 02:11 - Clearly Defining an AI Agent 05:28 - The Biggest Challenging Developing AI Agents 08:17 - Tip #1: Use Agents to Save Time, not Replace You 10:44 - Tip #2: Don't Skimp on Planning & Prototyping 12:00 - Tip #3: Beware the Hallucination Blow Up 14:27 - Windsurf (Agentic Coding Assistant) 15:56 - Tip #4: Reduce Hallucinations with Agent Guardrails 19:22 - Tip #5: Reduce Hallucinations with Specialized Agents 21:20 - Tip #6: Reduce Hallucinations with EXAMPLES 23:12 - Tip #7: Avoid Negatives in System Prompts 25:21 - Tip #8: Avoid Contradictions in System Prompts 28:41 - Tip #9: Version Your System Prompts! 30:08 - Tip #10: Swapping LLMs can be Dangerous 32:11 - Tip #11: Your Favorite LLM isn't Always the Best 33:32 - Tip #12: LLMs - Watch Your Context Lengths 35:28 - Tip #13: Previous Hallucinations Likely Repeat 37:29 - Tip #14: Long Term Memory is Just Another RAG 39:06 - Tip #15: Include Tool Calls in Conversation History 41:06 - Tip #16: Tool Descriptions are KEY 42:51 - Tip #17: Give Examples for Complex Tools 43:35 - Tip #18: Always Catch & Return Tool Errors 45:10 - Tip #19: Tools - Only Return what the LLM Needs to Know 46:39 - Tip #20: The Anatomy of a Good Tool 49:18 - Dynamous Community Q&A ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Join me as I push the limits of what is possible with AI. I'll be uploading videos at least once a week - Wednesdays at 7:00 PM CDT!

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