Qt Creator 21 Beta now includes Qt Profiler and Git navigation views

Qt Creator 21 Beta enables its ACP integration and MCP server by default, with bearer-token authentication now required by default for the MCP server; ACP also adds protocol version 2 and expanded chat session controls.

The release adds a QDoc editor with rendered preview, inline editing in the single-file diff view, and editor controls for Git merge-conflict markers.

It also introduces the Qt Profiler in a new Profile mode, Git Changes and Git Log navigation views, plus experimental support for HarmonyOS, remote Windows devices over SSH, and Podman-managed containers.