The letter

One letter a week, starting soon.

The week's signal, what shipped, what is worth running tonight, and the editor's note. No tracking, no ads, nothing else.

We keep your address, your language and the date you joined, nothing else. Every letter has a one-click unsubscribe link that deletes the record.

Hamel Husain

8 stories

Hamel HusainVoicesHow To Use Decision Models for Evals main.content table { display:block; width:100%; max-width:100%; overflow-x:auto; } #evaluation-prompt pre { background:var(--bs-body-bg); color:var(--bs-body-color); padding:18px; border:1px solid…

10.20

Hamel HusainVoicesClaude’s new auto eval tool Anthropic released new eval tooling for Claude Code . Their claude-api plugin now includes a new build_eval and hill-climb command that helps you build evals, check the graders, and improve your…

09.30

Hamel HusainVoicesAI Evals: Everything You Need to Know This document curates the most common questions Shreya and I received while teaching 5,000+ engineers and PMs AI Evals. Warning: These are sharp opinions about what works in most cases.

09.18

Hamel HusainVoicesAI Product Engineering Notes Notes from 13 sessions on evals, context, and systems. 9.5 hours of talks distilled into about 20 minutes of reading.

08.12

Hamel HusainVoices“It’s Hard to Eval” Is a Product Smell .da-fig { max-width: 600px; margin: 1.6rem auto; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; /* proof-surface tint: neutrals nudged toward one…

06.29

Hamel HusainVoicesThe Revenge of the Data Scientist img.img-fluid { border: 1px solid rgba(255, 255, 255, 0.25); border-radius: 4px; } Is the heyday of the data scientist over?

03.26

Hamel HusainVoicesEvals Skills for Coding Agents Today, Shreya Shankar and I are publishing evals skills , a set of skills for AI product evals 1 . Eval tools often get in the way.

03.02

Hamel HusainVoicesWhy I Stopped Using nbdev Programmers love to proclaim they’ve found the best tool. Paul Graham called Lisp his “ secret weapon .” DHH described Ruby as “ a magical glove that just fit my brain perfectly .” Pieter Levels…

01.18