Field notes

What production taught me.

Lessons I stumbled into while a system was already running. Not a tutorial farm.

MLOps · 2026-09-30T17:45:32.661+00:00 · 5 min

Decision-time truth vs report-time truth

Latency between model output and report generation.

Machine Learning · 2026-08-12T00:00:00+00:00 · 8 min

Causal ML & Elasticity

A catalog will punish a naive demand model.

causal ML · pricing · DML · production

Quant · 2026-05-20T00:00:00+00:00 · 7 min

Building a macro-regime RAG for equity positioning

A research system: FRED in, evidence retrieved, a regime out, then — and only then — a posture.

quant · RAG · macro · research