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Cold Starts, Lost Files, and Green Dots: Five Myths About Using a Free Server as Staging

Cold Starts, Lost Files, and Green Dots: Five Myths About Using a Free Server as Staging

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5 min read
Properties Without Witnesses Are Decorations: A Falsifiability Gate for Agent Patches

Properties Without Witnesses Are Decorations: A Falsifiability Gate for Agent Patches

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5 min read
Codex Swapped Its Default Model and Retired GPT-5.5 in 15 Days. Did Your Evals Notice?

Codex Swapped Its Default Model and Retired GPT-5.5 in 15 Days. Did Your Evals Notice?

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8 min read
Stop Using Random Card Numbers in Your Checkout Tests (Use These Instead)

Stop Using Random Card Numbers in Your Checkout Tests (Use These Instead)

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3 min read
A 200 response and a broken page: what screenshot monitoring taught me

A 200 response and a broken page: what screenshot monitoring taught me

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3 min read
Your Public Beta Needs a Bug Report a Stranger Can Reproduce

Your Public Beta Needs a Bug Report a Stranger Can Reproduce

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6 min read
Stop Blaming the Model: A Failure-Taxonomy Probe for Agent Runs on Free Tiers

Stop Blaming the Model: A Failure-Taxonomy Probe for Agent Runs on Free Tiers

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5 min read
Privacy Budgets for Test Email in Web Apps

Privacy Budgets for Test Email in Web Apps

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5 min read
Make a Flaky Test Fail on Demand Before You Hand It to Your Coding Agent

Make a Flaky Test Fail on Demand Before You Hand It to Your Coding Agent

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9 min read
What Claude Code memory really loads at start

What Claude Code memory really loads at start

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1 min read
Test Whether a User Correction Survives the Next AI Step

Test Whether a User Correction Survives the Next AI Step

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2 min read
The 200 that is not a result: how to verify without fooling yourself

The 200 that is not a result: how to verify without fooling yourself

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2 min read
Amazon Bedrock AgentCore's Nine-Stage Eval Framework: How AWS Catches Silent Agent Quality Regressions Before Production

Amazon Bedrock AgentCore's Nine-Stage Eval Framework: How AWS Catches Silent Agent Quality Regressions Before Production

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6 min read
It passes on your machine and breaks in CI — the causes that are not your code

It passes on your machine and breaks in CI — the causes that are not your code

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2 min read
A Skipped Test Is a Withdrawal: Make Agent Patches Deposit a Property Before You Freeze a Flake

A Skipped Test Is a Withdrawal: Make Agent Patches Deposit a Property Before You Freeze a Flake

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6 min read
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