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I Was About to Spend Money on Ads. So I Made an AI Agent Test My Product for 29 Hours.

I Was About to Spend Money on Ads. So I Made an AI Agent Test My Product for 29 Hours.

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7 min read
We Shipped a Mortgage Calculator Bug Where Every Test Was Green and the Answer Was Still Wrong

We Shipped a Mortgage Calculator Bug Where Every Test Was Green and the Answer Was Still Wrong

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3 min read
The Date Was Visible. The Model Was Null.

The Date Was Visible. The Model Was Null.

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4 min read
I use AI agents to code. Four checks I built to trust them.

I use AI agents to code. Four checks I built to trust them.

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5 min read
Writing Gherkin That Developers Actually Read

Writing Gherkin That Developers Actually Read

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7 min read
Three Silent Bugs That Broke Our AI Evaluation Harness

Three Silent Bugs That Broke Our AI Evaluation Harness

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4 min read
Unit Tests Passed. The Feature Never Ran. Three Times in One Session.

Unit Tests Passed. The Feature Never Ran. Three Times in One Session.

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8 min read
Testing a Two-Chart Compatibility Engine Without Inventing Missing Data

Testing a Two-Chart Compatibility Engine Without Inventing Missing Data

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6 min read
I Tested a Star Wars API With Playwright, and It Was More Fun Than I Expected

I Tested a Star Wars API With Playwright, and It Was More Fun Than I Expected

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6 min read
The First Ten Minutes of Testing a Design on Mobile

The First Ten Minutes of Testing a Design on Mobile

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5 min read
Cyclomatic Complexity Has a Blind Spot — Introducing Coverage Difficulty (CD) and Responsibility Load Factor (RLF)

Cyclomatic Complexity Has a Blind Spot — Introducing Coverage Difficulty (CD) and Responsibility Load Factor (RLF)

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3 min read
How a Test Coverage Ratchet Finally Fixed the Codebase Everyone Was Afraid to Touch

How a Test Coverage Ratchet Finally Fixed the Codebase Everyone Was Afraid to Touch

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7 min read
A Safe Outcome Can Hide a Failed Security Control

A Safe Outcome Can Hide a Failed Security Control

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5 min read
Debugging a black box: 36 renders against Claude, and the part where my own data was wrong

Debugging a black box: 36 renders against Claude, and the part where my own data was wrong

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6 min read
Four High-severity bugs were hiding behind a green test suite in a 7k-star library

Four High-severity bugs were hiding behind a green test suite in a 7k-star library

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6 min read
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