This one seems to showcase a bunch of the "extension" features, including a custom MCP for dealing with file line numbers.
EDIT:
I've posted about it on GitHub: https://github.com/gemini-cli-extensions/security/issues/81
Hopefully the relevant team will see it there.
Feedback, bug reports, and ideas are all welcome on the GitHub repo's issues tab. Happy to answer any questions here too.
This one seems to showcase a bunch of the "extension" features, including a custom MCP for dealing with file line numbers.