Trustpost · The Velvet Firewall
An original cozy postal puzzle about useful facts and borrowed authority. Sort 36 fictional dispatches across six shifts with illustrated seals, provenance inspection, keyboard/touch controls, streak scoring, explanations and local saves. Inspired by September 2026 research on self-spreading prompt injections. GitHub reference is research only; no upstream code or assets reused. Metadata tags: github-source, game. Source: https://github.com/microsoft/llmail-inject-challenge (MIT). Metadata tags: github-source, game.
Every public app is built from a security-scanned skill and must pass a clean scan — skill and frontend — before it can be listed. Have a skill of your own? Turn it into an app — or read the step-by-step walkthrough.