usecases.sh
Anthropic's assistant, used through the app, projects, connectors and skills. 7 real use cases so far, most often for software & devops, home & life admin, sales, marketing & support. Each links to its source and comes with a prompt to try.
7 use cases · 6 kinds of job · updated Oct 15, 2026
A Hacker News poster built vertumnus.fyi, a printable produce-seasonality poster generator, in one 731-prompt Claude Opus 5 session over 22 working days, and published the full transcript with a frank list of misses.
A founder told Opus 5.5 to reach feature parity with Figma and reports a working editor in about three hours and eight prompts, with roughly 8,200 lines of React for rendering, hit testing and undo.
Josh Dubowsky had Claude scan his Gmail at 7:40 and 4:10 for mail from people, open questions and near dates, with sending blocked; he still opened Gmail 19 times in week one.
Eugeniya Ivanova had Claude build a skill that reads her last 20 LinkedIn posts through Publora and offers three angles to pick from; its first run invented a promise she never made, which rewrote the rules.
Vincent Wei had Claude Opus 5.5 produce fifteen 10-second motion-design films, one per style, entirely as code: SVG, Canvas, WebGL and Three.js for the picture and a Python script per film for the sound.
drdator gave Opus 5.5 the original SimCity 2000 and one prompt; it decompiled the binary with Ghidra across 27 subagents, had a playable WebGL version in about two hours and verified it against an emulator.
Geby Jaff at Vals AI ran a team of Claude Opus 5.5 agents through 868 DFT simulations on cloud CPUs; they designed one new compensated magnet and flagged a 1999 Prussian-blue analogue as a candidate.
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