Matthew Voshell

HYROX doubles racers were finding partners and planning races in Facebook groups and WhatsApp threads. I co-founded MatchRox and designed and built most of the iPhone app: match on run pace, station strengths and racing style, plan all eight runs and stations together, then run race week from shared checklists. It is in public beta.

Citibank wanted compliance analysts to clear alerts faster. I started with interviews and a wall of whiteboard notes, and speed was not on their list of needs. So I made the product person-centric: built around how an analyst works a case, not how alerts fire. It shipped to compliance teams in 82 countries and 42 languages.

I kept calling the same handful of Claude Code skills together. In my own history, 69 of 352 skill turns used two or more. Claude had no way to load a ready-made set. I designed Playlist inside the slash menu Claude users already know. Then I built and shipped it as an open-source plugin, from first commit to release in one afternoon.

A skill that matches its repository should be current. I checked 12 that matched byte for byte, and 10 still had an instruction that failed or was deprecated. So I designed and built Skill Health, a Claude Code plugin that checks each instruction against current docs and hands Claude the fixes. An optional menu bar app flags what needs a fix.