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I built the fastest e2e framework

I built the fastest e2e framework

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4 min read
Postgres race conditions live in a window of a few milliseconds

Postgres race conditions live in a window of a few milliseconds

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9 min read
Teaching Agents to Explore

Teaching Agents to Explore

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7 min read
What Fixture Replay Can't Catch

What Fixture Replay Can't Catch

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7 min read
Optimising Feedback Time for Agent Teams

Optimising Feedback Time for Agent Teams

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9 min read
How to evaluate an AI-generated job shortlist

How to evaluate an AI-generated job shortlist

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5 min read
What I found when I pointed a CLI recorder at a second Rust rewrite

What I found when I pointed a CLI recorder at a second Rust rewrite

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5 min read
What You See Is What Gets Charged: Fixing a Double-Billing Bug in a Modular SaaS

What You See Is What Gets Charged: Fixing a Double-Billing Bug in a Modular SaaS

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2 min read
0/55 three nights in a row: product bug or test bug?

0/55 three nights in a row: product bug or test bug?

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3 min read
RAG evaluation: how do you test that citations hold up?

RAG evaluation: how do you test that citations hold up?

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7 min read
An invoice API response is not a document delivery receipt

An invoice API response is not a document delivery receipt

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4 min read
Day 25/90: It passed validate AND plan, then shipped a broken security group

Day 25/90: It passed validate AND plan, then shipped a broken security group

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3 min read
Your Outbox Can Still Deliver Twice

Your Outbox Can Still Deliver Twice

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10 min read
I asked four models what they are for. The one with X access got my handle wrong.

I asked four models what they are for. The one with X access got my handle wrong.

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3 min read
Three invariants every fixed-rate loan calculator should pass

Three invariants every fixed-rate loan calculator should pass

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3 min read
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