Lawrence Huibuilds AI · writes in public
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Essays from building with AI.

Notes from the work as it happens: voice agents, coding-agent infrastructure, AI defense, and trading research.

Featured essayEveryone's Burning Millions on AI Coding. I Tried to Fix the Bill — and Built the Wrong Thing.I spent days building a proxy to cut my AI coding bill. The benchmark deleted it — and showed me the one setup change that actually cuts cost by an order of magnitude. It wasn't the model.1 June 2026 · 6 min readRead the essay→
19 June 2026Three Tools Want to Cut Your AI Token Bill. They're Fixing Three Different Leaks.Caveman, Headroom, and the proxy I built all promise cheaper agents. Put side by side, they attack three different points in the pipe — and only one of them is aimed at the tokens that actually cost money.