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How Meta's design director built Muse, an AI agent for messaging and personalization

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InterviewEvergreen

TLDR

Lenny's Newsletter publishes an interview with Meta design director Alex Cornell on the product thinking behind Muse, Meta's consumer AI agent.

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Optimixed's original report on this story.

Lenny's Newsletter interviews Alex Cornell, a design director at Meta who leads design on Muse, the company's AI agent. Cornell discusses design decisions across Muse's interface, including its messaging-like feel, three-layer status display for different technical skill levels, generative UI, and personalization through feeds. The conversation covers use cases ranging from shopping and price alerts tied to Instagram and Pinterest data to golf round tracking and chess game analysis.

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