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Find those bugs before your users do! 🐛

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Testing MCP agents offline: the recording is the server 📼

Testing MCP agents offline: the recording is the server 📼

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3 min read
hidane 0.1.0: a Firestore emulator without Java, tested against the official one

hidane 0.1.0: a Firestore emulator without Java, tested against the official one

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6 min read
Test the data state before you style the market dashboard

Test the data state before you style the market dashboard

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Comments 1
5 min read
I tested two agent rules before shipping them. One was needed, one was not.

I tested two agent rules before shipping them. One was needed, one was not.

Comments 1
4 min read
Our chart is a pure function, so "no two labels overlap" is a unit test

Our chart is a pure function, so "no two labels overlap" is a unit test

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Comments 1
6 min read
Production Debugging: Test Hypotheses, Not Guesses

Production Debugging: Test Hypotheses, Not Guesses

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5 min read
Equal scores should not make a dashboard shuffle: deterministic ranking in JavaScript

Equal scores should not make a dashboard shuffle: deterministic ranking in JavaScript

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5 min read
TraceScope: Impact Analysis, Design Diff, and Crash Triage for DeepSeek Harness

TraceScope: Impact Analysis, Design Diff, and Crash Triage for DeepSeek Harness

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7 min read
A correct transcript doesn't prove clean audio

A correct transcript doesn't prove clean audio

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5 min read
The First Bugs My Reconciliation Tool Caught Were Its Own

The First Bugs My Reconciliation Tool Caught Were Its Own

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4 min read
Why a Coding Agent Needs an MCP for Allure TestOps When a Human Can Just Open the Browser

Why a Coding Agent Needs an MCP for Allure TestOps When a Human Can Just Open the Browser

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Comments 1
5 min read
7 two-minute tests to run before App Review (for Lovable/Bolt/v0/Replit apps)

7 two-minute tests to run before App Review (for Lovable/Bolt/v0/Replit apps)

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5 min read
Why a browser-based Gemini watermark remover should sometimes keep the original

Why a browser-based Gemini watermark remover should sometimes keep the original

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Comments 1
4 min read
I ported Germany's payroll tax flowchart to TypeScript and got it wrong three times

I ported Germany's payroll tax flowchart to TypeScript and got it wrong three times

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4 min read
Every bug we found this release was the same bug

Every bug we found this release was the same bug

Comments 1
6 min read
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