Edit Operator Source is a Blender add-on from scorpion81 that opens the source file of a chosen operator, or its call locations. It works from within Blender's Text Editor, giving direct access to the code behind an operator.
The add-on lives in the Text Editor sidebar under the Edit Operator panel. It was originally part of Blender 4.1's bundled add-ons and is now offered separately, maintained as-is with limited support. It requires no special permissions to run.
The current release is version 1.2.4, updated in May 2024, at a compact 2.8 KB. It is compatible with Blender 4.2 LTS and newer, and released under the GNU General Public License v2.0 or later. The add-on can be added by dragging and dropping it into Blender or by installing it from disk. Documentation and the full version history are available on the developer's page at projects.blender.org.