https://twyoon.com/ Writings by Taewan Yoon en Fri, 02 Oct 2026 17:42:35 GMT https://twyoon.com/writings/who-holds-the-loop/ https://twyoon.com/writings/who-holds-the-loop/ Tue, 01 Sep 2026 00:00:00 GMT I spent a week running GPT models inside Claude Code. Here is the harness that decides everything, OpenAI's new plugin, and the receipts from every claim I tested. Claude Code OpenAI Codex Agentic AI System Design https://twyoon.com/writings/what-documentation-does-an-agent-need/ https://twyoon.com/writings/what-documentation-does-an-agent-need/ Tue, 04 Aug 2026 00:00:00 GMT 729 blind trials on CLAUDE.md and skill files. The same document scored 87% and 13% depending on nothing but the filesystem underneath it. Claude Code Anthropic Agentic AI Context Engineering Evaluation https://twyoon.com/writings/what-form-should-knowledge-take/ https://twyoon.com/writings/what-form-should-knowledge-take/ Tue, 21 Jul 2026 00:00:00 GMT Where the AI frontier is settling on the form curated knowledge should take as a system, and the narrower role RAG and retrieval now play in serving it. Knowledge Management Enterprise AI Agentic AI Data Governance Retrieval https://twyoon.com/writings/knowledge-for-finance/ https://twyoon.com/writings/knowledge-for-finance/ Sun, 21 Jun 2026 00:00:00 GMT Finance standardized its data for two decades but rarely kept the reasoning behind decisions. AI makes that reasoning cheaper to find. How firms can manage it. Knowledge Management Financial Data Enterprise AI Data Governance Agentic AI https://twyoon.com/writings/files-are-the-memory/ https://twyoon.com/writings/files-are-the-memory/ Sat, 30 May 2026 00:00:00 GMT Agentic memory is a harder problem than it looks. Here's what I learned building a memory-enabled agent around GitHub and Claude Code. Agentic Memory System Design Claude Code Agentic AI Context Engineering https://twyoon.com/writings/translation-layer/ https://twyoon.com/writings/translation-layer/ Thu, 14 May 2026 00:00:00 GMT What 6+ years of building and shipping, and 40+ AI rooms, taught me about earning trust in AI. Developer Marketing Community Product Marketing https://twyoon.com/writings/science-based-skincare-routine/ https://twyoon.com/writings/science-based-skincare-routine/ Thu, 23 Apr 2026 00:00:00 GMT People keep asking what skincare products I use. My daily routine, paired with the dermatology and photobiology research that justifies each step. Medical Science Health Routine https://twyoon.com/writings/tracing-the-minds-behind-claude-code/ https://twyoon.com/writings/tracing-the-minds-behind-claude-code/ Mon, 06 Apr 2026 00:00:00 GMT I read two Claude Code source trees side by side to trace what changed, and what held, across 13 months of the product's development. Claude Code Anthropic Agentic AI System Design Software Architecture https://twyoon.com/writings/agents-need-better-infrastructure/ https://twyoon.com/writings/agents-need-better-infrastructure/ Tue, 24 Mar 2026 00:00:00 GMT 300 builders hit inference limits at Mistral's worldwide hackathon. What agent developers need to know about the serving layer GTC 2026 announced to fix it. Agentic AI AI Infrastructure Open Source NVIDIA Mistral AI https://twyoon.com/writings/what-senior-business-leaders-ask-about-ai/ https://twyoon.com/writings/what-senior-business-leaders-ask-about-ai/ Tue, 17 Mar 2026 00:00:00 GMT Ten questions Directors and C-suite leaders asked when I guest-lectured at Columbia's executive AI program: liability, data, switching costs, talent. Enterprise AI AI Strategy Executive Education https://twyoon.com/writings/learning-with-ai/ https://twyoon.com/writings/learning-with-ai/ Thu, 12 Mar 2026 00:00:00 GMT How arguing with Claude turned 6 weeks of Causal Inference into a repeatable system for learning any technical subject, with the full chat transcript. AI Learning Claude Causal Inference https://twyoon.com/writings/mistral-worldwide-hackathon-2026-recap/ https://twyoon.com/writings/mistral-worldwide-hackathon-2026-recap/ Tue, 03 Mar 2026 00:00:00 GMT 7,000+ applications, 1,000+ builders, 7 cities, $200K+ in prizes: inside Mistral AI's first worldwide hackathon, from the judge's seat at the New York edition. Hackathon Open Source Community Building NYC Tech https://twyoon.com/writings/ai-superpower-for-pm/ https://twyoon.com/writings/ai-superpower-for-pm/ Thu, 26 Feb 2026 00:00:00 GMT Context engineering is the core AI skill for product managers. What it is, how it differs from prompt engineering, and how PMs can practice it. Product Management Context Engineering Claude Code https://twyoon.com/writings/iterate-columbia-hackathon-2026-recap/ https://twyoon.com/writings/iterate-columbia-hackathon-2026-recap/ Mon, 16 Feb 2026 00:00:00 GMT 300 builders, 60+ teams, 8 corporate sponsors, and a 20+ person organizing team. Inside the Valentine's Day hackathon at Columbia Business School's Geffen Hall. Hackathon Agentic AI Community Building NYC Tech