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Engineering Notes

Build logs and field reports from the xentropy fleet — infrastructure, AI, and the systems behind the products.

July 11, 2026·kubernetes, CI/CD, deploy

You pushed. The pods didn't pull.

The deploy said success. Production ran old code for forty minutes. The same-tag push is the most boring outage generator in Kubernetes — here's the prompt that catches it.

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July 11, 2026·debugging, AI prompts, production

The bug that wasn't a bug

The crash log pointed at our code. The real culprit was a rate limit wearing a stack trace as a disguise. Here's the prompt we now run before trusting any error message.

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June 28, 2026·PKM, knowledge tools, AI

The one thing every knowledge tool gets wrong

Your notes apps are museums. They organize what you already captured — but none of them think about your future.

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July 6, 2026·k3s, infrastructure, cost

Running production on a single k3s node

Notes on moving the xentropy stack off managed Kubernetes and onto a lean, self-hosted k3s cluster — and what we'd do differently.

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