How OpenAI Built 1 Million Lines of Code Using Only Agents: 5 Harness Engineering Principles
OpenAI's Codex team built a 1M-line codebase using only AI agents. Here are the five harness engineering principles they discovered along the way.
← Back
Blog
Simple thoughts on building, designing, and shipping
⌘K
Hidden Tool That Cuts AI Agent Web Browsing Token Costs by 100x
Discover Actionbook's revolutionary approach to solving browser agent speed and token cost issues. Manual-based automation delivers 10x speed and 1/100th the cost.
Codex 에이전트에게 100만 줄을 맡긴 OpenAI, 사람이 한 건 딱 5가지였습니다
Blog version of a 2026-02-11 LinkedIn note — same claims, cleaned structure for reading.
The Token Divide: How AI Pricing Creates New Economic Inequality
Opus 4.6 Fast mode costs $150/output tokens. This isn't just pricing, it's the birth of a new economic divide where token access determines competitive advantage.
Claude Code Agent Teams - From Setup to Shortcuts
A practical guide to Claude Code's new multi-agent teams feature: activation, keyboard shortcuts, terminal compatibility, task management, and known limitations.
AI Adoption Now Divides Enterprise Value by 4x - The Data Is In
Meritech Capital's analysis of 100+ public software companies reveals a stark valuation gap between AI-executing and non-AI firms.
The AI Chip Map Just Got Redrawn - Agents Changed Everything in 2026
OpenAI's $10B Cerebras deal, Nvidia acquiring Groq, and Google TPU mega-contracts signal a tectonic shift from GPU-centric training to inference-first silicon.
The AI Flywheel Paradox: OpenAI's Bet on More Compute Amid Overcapacity Fears
While the market warns of GPU overcapacity, OpenAI declares it needs even more compute. The real winner won't be whoever has the most power - it'll be whoever closes the gap between AI capability and actual user experience.
OpenAI & Google's 2026 Declaration: The AI Price War Has Begun, and Now Is the Best Time to Jump In
OpenAI and Google are racing to launch affordable AI plans while Chinese competitors shatter price floors. Here's why this moment is your best entry point.
AI Startups Must Re-Find PMF Every 3 Months
Elena Verna of Lovable explains why traditional growth playbooks are dead in AI. Funnel optimization is only 5% of growth - the rest comes from shipping.
Contact
Every connection matters to me.
Feel free to reach out anytime.