David Mar
I'm not a software developer or engineer — I'm interested in seeing what I can do with Claude Code. This site is a mix of professional and personal projects, all built that way: I bring the questions, Claude Code does the building.
Questions I've chased down
Real data, pipelines on my own machine — and the null results stay in.
Active
Card Market
The round trip on a collectable card costs 44% of the ask — and never less, at any price.
Active
Storefront Register
How long a storefront sits dark between tenants, block by block — SF against LA and Chicago.
Active
SF Civic Atlas
Two decades and 17 million rows of San Francisco civic data on one scrubbable map.
Active
Model Diff
What actually changed between two versions of a financial model — in meaning, not cells.
And when the question is a creative one
Saltmere
In progressA dating-sim RPG in one season — last port on the frontier coast.