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An illustration of a test that shows a red result and then a green result for the same code, with the labels 'Same code', 'FAIL', 'PASS' and 'Re-run'

Why Do Tests Fail Now and Then? Flaky Tests Explained with Small Node.js Experiments

2026.11.02

You push a change and CI goes red. You open the lo…

'What is 0.9 measuring?' written beside a tall thermometer-style gauge with a marked line near 0.9, and envelopes riding a conveyor belt that splits into two bins labeled 'auto' and 'review'

What Does Jev’s Confidence of 0.9 Actually Measure? (Series Part 3)

2026.10.23

The same top probability of 0.8 can give a confide…

A mail-sorting desk where several small classifiers on a laptop sort envelopes under the words 'Can a Mac do the sorting?' while a cloud-hosted classifier sorts the same envelopes in the background

Jev vs. Open-Source Jev-Compatible Classifiers: Laya, Kev and Von on a MacBook (Series Part 2)

2026.10.15

Accuracy came close to Jev’s, but error-free…

An illustration with the words 'Decisions don't need prose': one machine buries a desk in pages of essay while another quietly stamps a small verdict tag

Trying Jev: A Model That Answers With Types and Confidence Instead of Prose

2026.10.08

Decisions inside an app didn’t need a model …

An illustration of a grand old library reading room, where a small front table holds a handful of books beside a placard captioned 'Is That Really All?', while endless shelving packed with far more books recedes into shadow behind it

Why total Alone Can’t Tell You a Paginated List Hit Its LIMIT

2026.10.01

Say you’re building an API that lists orders…

My Very First “Yosakoi” Festival in Mid-summer!

2026.09.30

My Very First “Yosakoi” Festival in Mid-summer! He…

The words “Same look, different inside” above distinct internal structures settling into one stable form

Using Unicode NFC and NFKC Across Input, Display, and Storage Boundaries

2026.09.29

A text field can display two values that both look…

An illustration of a rotating airport baggage carousel beneath a large station clock, captioned 'Missing. No Error.', where a single suitcase keeps circling forever while every other bag has already been claimed

A WHERE updated_at > ? Sync Drops the Rows That Commit Late

2026.09.14

Say you’re moving order rows from one system…

A hero illustration headlined NO ONE CAUGHT IT, showing a fingertip pressing a button while a small red spark slips past an open hand and off the edge of the frame, unseen

An async onClick Handler’s Exception Never Reaches React’s Error Boundary

2026.09.08

Picture an ordinary form: a submit button that ope…

Hero illustration in which a single parcel carries two address labels for the same file, one written as file:///C:/tmp/entry-demo/cli.mjs and one written as C:tmpentry-democli.mjs, while the counter stamps them NO MATCH under the headline Same file, different spelling

Checking the Entry Point with import.meta.url in Node.js ESM, and How That Check Breaks

2026.08.31

One script, two machines. On Linux it does what yo…

An illustration of a gate at a fork in the road with the question 'Outlives the conversation?' written on it, and beyond the gate three signposts labeled 'Your Machine', 'Cloud', and 'CI'. The catchphrase 'One choice decides how far it runs' appears in the scene

How Should You Schedule Claude Code Runs?

2026.08.21

Every way to schedule Claude Code looks like it sh…

An illustration captioned 'Turning It Off and Deleting It Are Not the Same Thing,' showing a person at a laptop in an office surrounded by a mix of locked speech bubbles and open speech bubbles floating around them

ChatGPT Security Guidelines (Unofficial)