Daniel Rosehill Blog
Exploring technology, AI, business insights, and personal reflections from a curious mind
A quarter of every box you buy is wall
Multiply a box's outside dimensions and you overstate what it holds by about a quarter — and by more for a tapered attached-lid container than a straight-walled Eurobox. So I built the dataset nobody publishes: 48 sizes, 121 vendor listings.
Israel's open data portal has no changelog, so I built one
Israel's open data portal publishes a catalogue but no changelog — there's no way to ask what's new. Its CKAN API turns out to carry enough history to reconstruct one: 1,197 datasets across 124 months, and what actually landed in the last few weeks.
MK-Claude: a political platform for a party that doesn't exist
What would an Israeli political platform look like if somebody built one properly — every number sourced, every proposal costed, every trade-off admitted? Six policy areas, a four-stage pipeline with gates, and the unverified claims left visible.
Green Invoice MCP: putting Israeli invoicing inside Claude
An unofficial MCP server that puts Green Invoice's API inside Claude: all fifteen document type codes, new sandbox support, and why chaining an OCR'd receipt into a supplier and an expense is the part that actually saves time.
The shopping cart deserves to be a file
A shopping cart is a document you're never allowed to keep. .cart is an open, tax-aware JSON format that turns a cart into a portable file an agent can read, diff, re-price, or turn into a purchase order or RFQ.
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The warehouse apartment: how I moved my house onto industrial logistics standards
Renting in Israel means moving often, involuntarily, and expensively. My answer: store everything in the same standardised industrial containers — Euroboxes, pallets, picking bins — that industry uses to move things at scale.
An index of Israeli open-data projects
A point-in-time snapshot of Israeli open-data resources I've been tracking — government catalogues, scrapers, MCP servers, and downstream utilities, grouped by domain. Useful starting point if you're building anything against Israeli public data.
My index of Israel agent-skills repos
A small index of the Israel-focused Claude Code skill repos I'm working on — released plugins, the workspaces feeding into them, and a pointer to Skills-IL, a broader Israeli AI agent-skills directory.
What Jerusalem's air looks like when it stops driving
A natural-experiment analysis of 12 months of hourly Jerusalem air-quality data, relabelled against exact halachic windows and benchmarked against London and New York. Findings, methods, and caveats.
A few Hebrew fonts worth knowing about
A short tour of Hebrew fonts you can install today from Google Fonts — the workhorses, the formal ones, the handwriting, the deliberately weird, and the Rashi script.