Dave Plummer, the original creator of Windows Task Manager, has developed TMOG (Task Manager OG), a cross-platform reimagining of his classic tool that runs on macOS, Windows and Linux. Using Claude Code with a 107-page specification document, Plummer generated a working application in approximately four hours that functioned correctly on the first attempt. This project demonstrates how AI-assisted development can streamline the creation of professional software whilst reducing the typical complexity and expense of building cross-platform applications.

TMOG offers substantial improvements over Windows' built-in Task Manager, including 12 distinct views covering system diagnostics, process monitoring, network activity and disk usage. The application uses native code for each platform—Swift and AppKit on macOS, Direct2D on Windows, and Qt 6 on Linux—with a shared C++ core, rather than relying on a single wrapped web application. The free version provides comprehensive system monitoring on all three platforms, whilst a Pro tier ($39.95) adds Flight Recorder functionality for retrospective analysis of performance slowdowns. Plummer completed the project in six weeks with two collaborators, demonstrating the practical economics of contemporary AI-assisted development compared to traditional cross-platform application engineering.