Harness Engineering: Why the System Around the Model Matters More Than the Model

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Prompt engineering was the appetizer. Context engineering (what you feed, when, and how) is the main course.

I built 15+ products over five years. Most failed. Here is what I would actually tell myself if I could go back.

You are not "just a thinker." You trained your brain to loop. And anything trained can be untrained.

Query optimization, connection pooling, and caching strategies that cut our P95 from 3s to 400ms.

Ozempic works. But losing weight without exercise means losing muscle too. The tradeoffs nobody talks about.

Flipping lightness values does not make a good dark theme. The mirror rule gives you perceptually equivalent contrast.

AI can generate a song in seconds. But can it make you feel something? The answer is more nuanced than you think.

Why JSON Schema is the wrong abstraction for structured LLM output, and how TypeScript types do it better.

After running a bootstrapped startup for 5 years, here is my honest take on when to raise and when to stay lean.

Relying on discipline means relying on willpower, which is finite. Systems remove the decision, and that is where consistency lives.