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I Cut 2,490 Agent Test Runs to 206 and Kept the Same Coverage

I Cut 2,490 Agent Test Runs to 206 and Kept the Same Coverage

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Comments 4
5 min read
I shipped a Kasiski calculator with 21 passing tests. It got 3 of 5 key lengths wrong.

I shipped a Kasiski calculator with 21 passing tests. It got 3 of 5 key lengths wrong.

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6 min read
403 doesn't mean dead: four ways a link checker lies to you

403 doesn't mean dead: four ways a link checker lies to you

Comments 1
3 min read
Manual Testing vs Automation Testing: Which One Should You Learn First?

Manual Testing vs Automation Testing: Which One Should You Learn First?

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3 min read
Harness Is a Gate, Not an Orchestrator — an engineering memo

Harness Is a Gate, Not an Orchestrator — an engineering memo

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4 min read
A red gate and a silent one turned out to mean the same thing

A red gate and a silent one turned out to mean the same thing

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3 min read
What Grok catches, what Codex catches, and what the pair costs us

What Grok catches, what Codex catches, and what the pair costs us

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8 min read
Treat Tool Intent as a Deduped Outbox Before Planner Retries Double-Commit

Treat Tool Intent as a Deduped Outbox Before Planner Retries Double-Commit

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Comments 2
9 min read
Verifying two lines from the agent cost me an hour

Verifying two lines from the agent cost me an hour

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4 min read
Three rules read the declared level. None of them read its other copy.

Three rules read the declared level. None of them read its other copy.

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5 min read
Your LLM eval set is quietly certifying your bugs

Your LLM eval set is quietly certifying your bugs

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Comments 3
5 min read
Opinion: Repo Tests Are a Compromised Oracle for AI Patches — Probe the Contract the Model Never Saw

Opinion: Repo Tests Are a Compromised Oracle for AI Patches — Probe the Contract the Model Never Saw

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5 min read
Relabeling 22 backlog items moved a progress bar 23 points, and I hadn't shipped anything

Relabeling 22 backlog items moved a progress bar 23 points, and I hadn't shipped anything

5
Comments
3 min read
When a Safety Reviewer Rejected Everything and Still Passed Its Test

Summer Bug Smash: Smash Stories 🐛🛹

When a Safety Reviewer Rejected Everything and Still Passed Its Test

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Comments 1
5 min read
How I Backfilled 1,200 Tests Into a 5-Year-Old Codebase With Claude Code

How I Backfilled 1,200 Tests Into a 5-Year-Old Codebase With Claude Code

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Comments 1
8 min read
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