Agents Edit QML, But Don’t See the Result Without Building, Compiling, and Running

AI agents can make many UI changes in a single iteration. AI agents edit files, maybe run a build, and then report success. Every change can costs a full rebuild and relaunch, or it goes unchecked by the developer. Qt's QML Live Preview MCP tool makes autonomous AI agent work transparent for the developer at a low token expense: it runs the app and hot reloads changed QML files, without a rebuild and without a restart.

Qt 6.12 already ships the qmlpreview executable, but using it directly from an agentic harness is harder than it looks.…