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Under The Hood

MSPK

Exploring what really happens when you write frontend code

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Substack
PricingOnly free issuesPublishesDaily
Issues37Founded8 months agoLast Issuea month ago
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Latest Issues

Your AI Feature Works. Your Users Don't Trust It. Here's Why.

You ran the evals. The accuracy numbers are solid. You tested it across hundreds of inputs, edge cases included. The thing works.

So why are users still copying the output into Google to double-check it?

This is the quiet crisis inside a...

a month ago
1

AI Killed "Powered by AI"

There’s a moment every product person dreads now.

A user lands on your app, sees “AI-powered” somewhere in the UI — a badge, a headline, a little sparkle icon — and their shoulders drop. Not excitement. Not curiosity. Just a quiet, involun...

a month ago

Designing for Confident Wrong Answers: The Hardest UX Problem in AI

The model is wrong. You can tell because you happen to know the answer. But your user doesn’t — and the interface gave them no reason to doubt it.

This is the central UX failure in AI products right now. Not that models hallucinate — that’...

2 months ago

You Hated Matrix Math in College. Turns Out It Runs Every AI Model You’ve Ever Used.

There’s a specific kind of pain reserved for sitting in a linear algebra lecture, staring at a matrix multiplication problem, and thinking: when will I ever use this?

Your professor said “it’s foundational.” You filed that under “things ad...

2 months ago

The KV Cache: Why Your API Bill Is Higher Than It Should Be

If you’ve used the Claude or OpenAI APIs at any meaningful scale and never touched prompt caching, you’ve been overpaying. Potentially by 90%. Not as a rounding error — as a structural tax on not understanding what’s happening under the hoo...

2 months ago

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