Open Swimcast
Another little app I only built because it was essentially free to build - this one gets my podcast feed onto a pair of underwater swimming headphones.
Artificial intelligence
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David's Debbie App
Another little bespoke app I built for myself - this one translates English and German live so I can talk to my sister-in-law.
Climbing the Ladder of Abstraction
I gave a talk at AI Practitioner London on what 'good enough' looks like when you can no longer review every line an AI writes.
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The Jevons Paradox and the Kindle Web Proxy
When solving problems becomes almost free, more problems get solved. I built a silly little app last night that nobody else would ever build, and that's sort of the point.
Claude Agent SDK Part 7: Creating Custom MCP Tools
Exposing Python functions as tools Claude can call directly
Claude Agent SDK Part 6: Fixing the Bash Bypass and Understanding Permissions
Closing the checkpointing loophole and getting to know the SDK's permission system.
Claude Agent SDK Part 5: Editing Files with Checkpointing
Adding the ability for the agent to create posts that follow my templates, with the ability to recover from mistakes.
Claude Agent SDK Part 4: Implementing Context Profiles
Building context profiles and usage tracking that works with the SDK's design.
Claude Agent SDK Part 3: The Context Control Problem
Discovering the trade-offs between agency and control when building on the Claude Agent SDK.