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← Build School

○ Free to read

Notes from the bench.

Build notes, not think-pieces. Everything here is free — new ones land about twice a month.

What an agent actually is (and isn't)12.09.20266 min
The 40-line loop behind every agent28.08.20269 min
Evals before vibes: test LLM output like code09.08.20267 min
Why your RAG app makes things up21.07.202611 min