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We stopped writing eval cases by hand. Now every prod incident becomes one.

We stopped writing eval cases by hand. Now every prod incident becomes one.

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2 min read
A green test suite proves less than you think

A green test suite proves less than you think

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5 min read
Distinguishing wrong from absent

Distinguishing wrong from absent

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1 min read
200 OK Is Not the Same as "It Works"

200 OK Is Not the Same as "It Works"

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5 min read
Zero Is Not a Measurement

Zero Is Not a Measurement

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5 min read
Mockyard Update: Real Addresses Are Here

Mockyard Update: Real Addresses Are Here

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2 min read
Date-counting bugs I test before shipping a deadline calculator

Date-counting bugs I test before shipping a deadline calculator

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1 min read
Python Data Validation Patterns for Production Systems

Python Data Validation Patterns for Production Systems

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4 min read
OpenAI-compatible gateway smoke test: verify the first API call before scaling

OpenAI-compatible gateway smoke test: verify the first API call before scaling

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1 min read
Emulators vs. Real Devices: Why Google Rejects Your Closed Testing Phase

Emulators vs. Real Devices: Why Google Rejects Your Closed Testing Phase

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4 min read
Recording product demos with Playwright and no human

Recording product demos with Playwright and no human

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6 min read
Engenharia de Prompts para Massa de Dados: Escalando Testes com Cobertura e Sem Duplicidade utilizando LLMs

Engenharia de Prompts para Massa de Dados: Escalando Testes com Cobertura e Sem Duplicidade utilizando LLMs

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5 min read
Five Comments That Redesigned My LLM Verification Pipeline

Five Comments That Redesigned My LLM Verification Pipeline

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Comments 44
26 min read
I built a readability test for my own compression format. It scored 0/24.

Column misalignment in compressed prompts

I built a readability test for my own compression format. It scored 0/24.

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5 min read
The empty-database problem: realistic test data in one command

The empty-database problem: realistic test data in one command

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2 min read
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