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48-Hour Field Notes: The Sample Parsed. The Contract Was Still Python.

48-Hour Field Notes: The Sample Parsed. The Contract Was Still Python.

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7 min read
Query the Freeze Store Only After a Bound Fixture Miss

Query the Freeze Store Only After a Bound Fixture Miss

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8 min read
When an independent audit corrected a coding-agent test report

When an independent audit corrected a coding-agent test report

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3 min read
Receipt-Bound Setup Guides: Narration Can Be Drafted, Promises Cannot

Receipt-Bound Setup Guides: Narration Can Be Drafted, Promises Cannot

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9 min read
Flaky Test Guide: Causes, Examples, And Fixes

Flaky Test Guide: Causes, Examples, And Fixes

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12 min read
Redacting PII with an LLM: Haiku drops the first words

Redacting PII with an LLM: Haiku drops the first words

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1 min read
D1 migrations: the table rebuild that D1 rejects

D1 migrations: the table rebuild that D1 rejects

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1 min read
We read all 1,186 failed agent runs. Half failed on the same thing.

We read all 1,186 failed agent runs. Half failed on the same thing.

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3 min read
LLM accessibility review: right answers, buried in advice

LLM accessibility review: right answers, buried in advice

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1 min read
Claude Haiku 5.5 vs Haiku 4.5: Apa yang Berubah dan Perubahan Merusak yang Harus Diperbaiki Pertama

Claude Haiku 5.5 vs Haiku 4.5: Apa yang Berubah dan Perubahan Merusak yang Harus Diperbaiki Pertama

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8 min read
LLM unit tests from a spec: the JSON broke first

LLM unit tests from a spec: the JSON broke first

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1 min read
I fixed a prefix check. The truth table says I changed two answers I didn't mean to.

I fixed a prefix check. The truth table says I changed two answers I didn't mean to.

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4 min read
Reviewing a SKILL.md: models catch injection, not limits

Reviewing a SKILL.md: models catch injection, not limits

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1 min read
Your AI Agent Says 'All Tests Pass.' Did They Actually Run?

Your AI Agent Says 'All Tests Pass.' Did They Actually Run?

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3 min read
Our skills, September 2026: measured with and without

Our skills, September 2026: measured with and without

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1 min read
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