--- title: "Rok Jung (@sangrok) | Hashnode" description: "Rok Jung (@sangrok) writes on Hashnode. Read their latest articles and follow their work." url: "https://hashnode.com/@sangrok" --- @sangrok # Rok Jung @sangrok · seoul · Joined February 2026 ### [Microsoft-OpenAI Partnership Amendment Decoded: Why Non-Exclusive Licenses and Revenue Caps Reshape AI Infrastructure for Indie Developers](https://sangrok.hashnode.dev/microsoft-openai-partnership-amendment-decoded-why-non-exclusive-licenses-and-revenue-caps-reshape-ai-infrastructure-for-indie-developers?utm_source=hashnode&utm_medium=feed) On April 27, 2026, Microsoft announced an amendment to its OpenAI partnership. While the official framing emphasizes "long-term clarity," the changes restructure the AI infrastructure landscape in ways that directly affect indie developers, small bus... 5 min read · [sangrok.hashnode.dev](https://sangrok.hashnode.dev/microsoft-openai-partnership-amendment-decoded-why-non-exclusive-licenses-and-revenue-caps-reshape-ai-infrastructure-for-indie-developers?utm_source=hashnode&utm_medium=feed) [Apr 28](https://hashnode.com/posts/microsoft-openai-partnership-amendment-decoded-why-non-exclusive-licenses-and-revenue-caps-reshape-ai-infrastructure-for-indie-developers/69f011796821c0f47fc18dcb) ### [TradingAgents v0.2.4 Architecture Deep Dive: Multi-Agent LLM Framework for Financial Decision Making](https://sangrok.hashnode.dev/tradingagents-v024-architecture-deep-dive-multi-agent-llm-framework-for-financial-decision-making?utm_source=hashnode&utm_medium=feed) TradingAgents v0.2.4 Architecture Deep Dive: Multi-Agent LLM Framework for Financial Decision Making Disclaimer: This article is a technical analysis of the TradingAgents framework, not investment advice. All backtest numbers are historical and do n... 9 min read · [sangrok.hashnode.dev](https://sangrok.hashnode.dev/tradingagents-v024-architecture-deep-dive-multi-agent-llm-framework-for-financial-decision-making?utm_source=hashnode&utm_medium=feed) [Apr 28](https://hashnode.com/posts/tradingagents-v024-architecture-deep-dive-multi-agent-llm-framework-for-financial-decision-making/69f00ee85b72a6ac7ce4a8d8) ### [Matt Pocock's Agent Skills — The Repo That Started the Skill Economy](https://sangrok.hashnode.dev/matt-pococks-agent-skills-the-repo-that-started-the-skill-economy?utm_source=hashnode&utm_medium=feed) TL;DR Matt Pocock (Total TypeScript founder) open-sourced his personal .claude/skills/ folder on 2026-02-03. Three months later: 30,344 stars, 2,380 forks, still actively pushed. The repo defines a paradigm shift — from vibe coding to real engineerin... 5 min read · [sangrok.hashnode.dev](https://sangrok.hashnode.dev/matt-pococks-agent-skills-the-repo-that-started-the-skill-economy?utm_source=hashnode&utm_medium=feed) [Apr 28](https://hashnode.com/posts/matt-pococks-agent-skills-the-repo-that-started-the-skill-economy/69f00e36202427ad41d07128) ### [GPT-5.5 Day 4 Analysis: SOTA Verified, But Not #1 Everywhere](https://sangrok.hashnode.dev/gpt-55-day-4-analysis-sota-verified-but-not-1-everywhere?utm_source=hashnode&utm_medium=feed) GPT-5.5 Day 4 Analysis: SOTA Verified, But Not #1 Everywhere OpenAI announced GPT-5.5 on April 23, 2026. The API followed one day later on April 24. We're now four days post-launch — far enough to see what holds up, close enough that third-party repr... 6 min read · [sangrok.hashnode.dev](https://sangrok.hashnode.dev/gpt-55-day-4-analysis-sota-verified-but-not-1-everywhere?utm_source=hashnode&utm_medium=feed) [Apr 27](https://hashnode.com/posts/gpt-55-day-4-analysis-sota-verified-but-not-1-everywhere/69eeb11495af72b981a01299) ### [Hermes Agent v0.11.0 Deep Dive: The Open-Source AI Agent That Hit 105K Stars in 7 Weeks](https://sangrok.hashnode.dev/hermes-agent-v0110-deep-dive-the-open-source-ai-agent-that-hit-105k-stars-in-7-weeks?utm_source=hashnode&utm_medium=feed) TL;DR Nous Research released Hermes Agent v0.11.0 on April 23, 2026 — the most significant open-source AI agent release of the year. Key facts: 105,000 GitHub stars in 7 weeks (fastest-growing open-source agent ever) GEPA self-improvement engine rai... 6 min read · [sangrok.hashnode.dev](https://sangrok.hashnode.dev/hermes-agent-v0110-deep-dive-the-open-source-ai-agent-that-hit-105k-stars-in-7-weeks?utm_source=hashnode&utm_medium=feed) [Apr 27](https://hashnode.com/posts/hermes-agent-v0110-deep-dive-the-open-source-ai-agent-that-hit-105k-stars-in-7-weeks/69eeafeca924ccdc3652c5d6)