Chris Zhan
RSS FeedI'm a software engineer in Taiwan. I work on AI infrastructure and agent systems — and I care most about the boring parts that keep a system honest.
Start with the latest posts below, or read more about me .
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Recent Posts
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The AI bottleneck isn't the model
What changed how I use AI wasn't a better model or a better prompt. It was having the data there.
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Don't trust an agent's account of what it did — audit the log
Two agents, one writing reports and one auditing them, both made up plausible technical stories about what they'd done. The only thing that caught it was a log neither of them could write.
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An invalid timezone shouldn't be a 500: FastAPI + ZoneInfo
Why an unknown timezone query param threw a 500 instead of a 400 in a FastAPI service — and the small ZoneInfo wrapper that fixes it.