Lenny's Reads

How to build your PM second brain with ChatGPT

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Dec 16, 2025
Explore the fascinating world of product management as Amir Klein divulges a method to create a PM second brain using ChatGPT. Discover how to combat the overwhelming burden of scattered product context. Learn to give your AI a unique personality and feed it essential documents, making it a powerful ally. Hear about practical use cases that showcase how this AI can help draft forms, prototype ideas, and tailor communications, transforming your workflow into a seamless experience.
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ANECDOTE

Drowning In Context Before The Second Brain

  • Amir Klein felt overwhelmed by scattered context across Slack, Notion, decks, and docs when building an AI agent at monday.com.
  • He dumped all that context into a ChatGPT project and finally began to see a roadmap and direction.
INSIGHT

AI Eases The PM's Mental Load

  • Context creates a heavy mental load because it arrives as fragmented pieces across sources.
  • Feeding that context into an AI turns it into an instantaneous librarian and associate PM that retrieves and synthesizes relevant data.
ADVICE

Define The Project's Personality

  • Create a project personality by writing instructions that make the AI think and challenge like you.
  • Use ChatGPT to draft that instruction text so the project mirrors your product sense, taste, and voice.
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