Helix has a system of pickers. It's a pop up window to open files, or open diagnostics coming from a Language Server.

The diagnostics picker displays data in columns:

• severity
• source
• code
• message

Sometimes it can get very crowded, especially when you have plenty of hints but few actual errors. I didn't know it, but Helix supports filtering in pickers!

By typing %severity WARN I only get warnings. I can even shorten it to %se (and not %s , since source also starts with an s ). The full syntax is well documented in the pickers documentation .