Notebook

Writing

Essays on payment rails, evaluation harnesses and the unglamorous infrastructure that keeps AI products honest.

How do you stop an AI from making things up? RAG Basics

RAG Systems, Explained Like You’re 7

Examines structural failures in retrieval-augmented generation systems with fixes from real world examples

Explains how in-process and Redis-backed rate limiters differ and why per-instance limits multiply when scaling horizontally.

A customer was charged twice for a single payment, but logs showed only one POST request.

Notes on payment rails, evaluation harnesses and the infrastructure agents actually need. Sent when something is published — never on a schedule.

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