Mickey Qiu

I ve been building with AI tools a lot lately, and one thing kept bothering me: I had dozens of great prompts scattered everywhere Notion docs, chat histories, screenshots It was chaos.

A week ago, Y Combinator held its Summer 2025 Demo Day in San Francisco, showcasing over 160 startups and highlighting 9 highly focused ones.

TL;DR: The most trending were AI-focused, specifically AI agents.

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