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Doug Warren

Software architect, developer, editor, and blogger.

Twitter Facebook Website Lago Vista, Texas, USA
Three Places for One PKM Vocabulary
PKM

Three Places for One PKM Vocabulary

I wrote down the 223 concept terms my vault and my tools argue about. Then I had to work out which of my three websites each part of it actually belongs on.

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🔧 AI Diabetes Coach — Build Your Own
PKM

🔧 AI Diabetes Coach — Build Your Own

You've read about what's possible. Now it's time to start building. This guide walks through three levels of implementation — from a simple Claude Project to a fully automated system — so you can begin wherever you are today.

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🕸️ AI Diabetes Coach—Knowledge Graph
PKM

🕸️ AI Diabetes Coach—Knowledge Graph

AI could be a genuinely knowledgeable diabetes coach — if only it could remember. Part 4 explores how a knowledge graph gives AI the persistent memory and structured context it needs to become a real health partner, not a brilliant stranger you re-introduce yourself to every time.

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💭 AI Diabetes Coach—AI Prompt Engineering

How I went from asking 'Why is my glucose high?' to getting personalized daily coaching that improved my time in range from 82% to 98%. Six iterations of prompt engineering that transformed generic AI into an essential health tool.

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🏗️ AI Diabetes Coach — System Architecture
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🏗️ AI Diabetes Coach — System Architecture

In Part 1, you saw 82% → 98% time in range. But how does it work? This reveals the complete system: 5 components that transform raw sensor data into daily AI coaching. Dexcom API to Neo4j to Claude AI. Real examples, $20/month total. Part 2 of 5.

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