Claude Code: Build apps & tools

Replace Google Forms with a custom customer app for a one-person business with Claude Code

Maarten runs a one-person business in the Netherlands registering repair crews' vehicles and mechanics for a parking exemption, and for five years it ran on seven Google Forms, one Google Sheet, Stripe and Gmail, with every row checked by hand and every card laminated at the kitchen table. After months stuck in a no-code tool, Maarten installed Claude Code at the start of 2026 and by the end of that day had the things that had been blocking progress for months. The new app checks license plates against the Dutch roads authority's open API and addresses against a national database, generates invoices automatically and lets clients manage their own fleets, with a CSV import for one client with 800 vehicles. Cleaning five years of old data took a week or two. By Maarten's own estimates, operations now take about 4 hours a week, down from about 8.

Build a terminal-to-HTML sharing tool with Claude Code for web

Claude Code for web built a terminal-to-html tool that turns pasted terminal output into a shareable gist-preview link, recorded start to finish in an 11-minute video.

Write and ship a complete Datasette plugin with Claude Code

Claude Code (Sonnet 4.5) wrote every line of code and every test for the datasette-os-info plugin with minimal prompting, and the author shipped it.

Generate a colophon page for a GitHub Pages site with Claude Code

Claude Code wrote a script that builds a mobile-friendly colophon page listing every tool and its commit history, then wired it into the GitHub Pages deploy workflow.

Vibe-code a 3D town-building game with Claude Code

From a single informal prompt, Claude Code built a working 3D game for placing buildings and driving around in about four minutes; follow-up prompts added a fire truck, traffic, and fires.

Reported by One Useful Thing:Working game in about four minutes