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Your Backtest Can Pass for the Wrong Reason: 5 Python Checks Before Deployment

Your Backtest Can Pass for the Wrong Reason: 5 Python Checks Before Deployment

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3 min read
How we golden-tested Israeli payroll math (so the law, not a config screen, does the calculating)

How we golden-tested Israeli payroll math (so the law, not a config screen, does the calculating)

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4 min read
Selenium Architecture & Setup

Selenium Architecture & Setup

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3 min read
Debug Playwright failures and run history without leaving VS Code

Debug Playwright failures and run history without leaving VS Code

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8 min read
How do you implement an efficient and robust authentication strategy in Playwright for E2E tests, minimizing setup time

How do you implement an efficient and robust authentication strategy in Playwright for E2E tests, minimizing setup time

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2 min read
Your Agent Loop Didn't Fail at Step 41. Your Budget Did.

Your Agent Loop Didn't Fail at Step 41. Your Budget Did.

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4 min read
ConstruĂ­ un buscador de disponibilidad para las bibliotecas del metro de Madrid (y un sistema para verificar que no se rompe)

ConstruĂ­ un buscador de disponibilidad para las bibliotecas del metro de Madrid (y un sistema para verificar que no se rompe)

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3 min read
My Migration Generator Shuffled Itself for Two Days. PYTHONHASHSEED Was the Coin Flip.

My Migration Generator Shuffled Itself for Two Days. PYTHONHASHSEED Was the Coin Flip.

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6 min read
Taking a React coding agent from a patch to a verified fix

Taking a React coding agent from a patch to a verified fix

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4 min read
Week 13 of #100DaysOfCode: Completing Spring Microservices and Starting JUnit 5

Week 13 of #100DaysOfCode: Completing Spring Microservices and Starting JUnit 5

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5 min read
Your Agent Says Verified. The Check Behind It May Be Empty.

Your Agent Says Verified. The Check Behind It May Be Empty.

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5 min read
Put your particle effects in CI: the silent-skip bug nobody catches by eye

Put your particle effects in CI: the silent-skip bug nobody catches by eye

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2 min read
I Watched os.replace Fail for 48 Hours. The Tempfile Lived on Another Device

I Watched os.replace Fail for 48 Hours. The Tempfile Lived on Another Device

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8 min read
Flowbook: versioned YAML playbooks for the product journeys your tests and API docs both miss

Flowbook: versioned YAML playbooks for the product journeys your tests and API docs both miss

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4 min read
I wanted Jepsen's Elle in CI without a JVM, so I wrote adya

I wanted Jepsen's Elle in CI without a JVM, so I wrote adya

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7 min read
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