A peer-to-peer digital check tool. You fill in an on-screen check, the app encrypts it in the browser and hands you a link to send on; whoever opens it gets a printable back side and instructions for depositing it through their own bank’s app. The P2P backend and the encryption scheme predate me — they’re the client’s own work on GUN.js. I built frontend pieces over that for a month: the saved-accounts UI and a step-by-step deposit walkthrough, then handed the project to a colleague when it turned out to be less than one person’s workload. The accounts UI is the part still running; the walkthrough was redesigned after I left, which is what I’d asked for on the way out.