The name is the button.

An agent writes the code now, and a human thumb hovers over Accept all a hundred times a day. The honest question of this decade is what, exactly, you just accepted. So I read the diff.

Eight years as a backend engineer in Stockholm, back in Tokyo since 2023, and I still ship something small most nights, usually badly. My one rule: the only real review of a model is the thing you built with it. That is why there is no leaderboard on this site.

Around a hundred and forty sources come through — the labs' own posts, the papers, the tools, the runtimes and languages nobody is watching yet, the chip under the demo, and the newsletters people actually forward. What is moving gets counted so the week reads at a glance, and every few days I explain one mechanism in plain words.

A story here is a headline, a short excerpt, one image and the link to whoever wrote it. We never reproduce the post; the images belong to their authors. A post written in Japanese appears in Japanese, exactly as it was published, and the link goes to the original.

— Yuki Halvorsen, Tokyo

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GPT-5.6 SolとClaude Opus 4.8でCSVインポートツールを一度書いて使い回す実測

11.03

Excelから書き出した商品CSVをデータベースや別サービスへ流し込む作業は、週に一度でも繰り返すなら手作業では持ちません。価格を桁落ちなく整数化し、不正な行を拒否し、失敗したときに前回のproducts.jsonやCSV原本を壊さない。この辺りは、使い捨てのスクリプトで...

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GPT-5.6 SolとClaude Opus 4.8でCSVインポートツールを一度書いて使い回す実測

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