Get harmless identity fields for the signed-in MCP user: id, username, email, display name, and the slug of the org t...

Get harmless identity fields for the signed-in MCP user: id, username, email, display name, and the slug of the org this request acts in. Email is empty when the caller is a team org rather than a person. Use email and display_name as git user.email / user.name on Kody remotes when a git-remote result is not already in hand.

Org permission: none (touches no org data).