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Product ReviewsYC CEO Garry Tan open-sourced gstack, a Claude Code toolset with 23 role-based AI tools covering CEO, Designer, Engineering Manager, QA and more. 97K+ GitHub stars. Full breakdown inside.
Expert OpinionsSam Altman and YC President Garry Tan discuss the convergence of OpenAI's foundation models and YC's startup ecosystem, revealing key signals about the next phase of AI entrepreneurship.

Gstack Agents is an MIT open-source tool that adds 18+ AI personas (CEO, CSO, YC partner, etc.) as voice bots to Google Meet, providing real-time multi-perspective structured feedback on your demos.

Gstack Agents is an MIT open-source tool that adds 18+ AI personas (CEO, CSO, YC Partner, etc.) as voice bots to Google Meet, providing real-time multi-perspective structured feedback on your product demos.
GitHub Daily · July 21: The Agent Skil…
GitHub Trending July 21: The Agent Skills ecosystem explodes as pluggable skill packs top the charts, MCP becomes the de facto standard, and ai-agent-book surges 4,434 stars in a day.

A beginner-friendly guide clarifying AI, machine learning, deep learning, and LLMs — tracing the evolution from Deep Blue to AlphaGo, ChatGPT, and DeepSeek.

New to AI? This guide clarifies AI, machine learning, deep learning, and LLMs, traces milestones from Deep Blue to DeepSeek, and maps out China's LLM landscape.

A beginner's guide to AI large models: clarify the relationships between AI, ML, deep learning, and LLMs, trace the journey from Deep Blue to ChatGPT and DeepSeek, and explore China's model landscape.

A teacher's guide to AI literacy: from AI history and LLM fundamentals to the Agent era, build a systematic cognitive framework and master tool selection strategies.
Tech FrontiersY Combinator holds ~0.6% of OpenAI, worth over $5 billion at the latest $852B valuation. From Sam Altman's YC presidency to today's staggering paper returns, this deal ranks among VC history's greatest hits.