The letter

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

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Editor

Yuki Halvorsen

Yuki Halvorsen was born in Sapporo to a Norwegian father and a Japanese mother, wrote her first program on a school computer that took ten seconds to draw a circle, and spent eight years as an engineer in Stockholm before Tokyo pulled her back. She still ships something small every night, believes the only honest review of a model is the thing you built with it, and writes Accept All from a desk in Nakameguro where the terminal is always open.

[email protected]

Columns

September 21, 2026

Japan Ran Claude Code All Night and Wrote Down What Broke

Editor’s notes

September 19, 2026

A Generated Diff Does Not Lie

September 16, 2026

A Voice Agent Should Know When to Stop Talking

September 13, 2026

An Agent Should Forget on Purpose

September 10, 2026

One Agent Grading Its Own Homework Is Not a Review

September 7, 2026

A Skill Is Only Real When You Need It

September 6, 2026

Read the Diff Before You Accept It