Intent of the HANDLE in steering committee

The Steering Committee blank has a "handle" box that is not present in the Maintainers. I wonder if there is any intent behind this and what should go in the "handle" box? Just a space for a nickname?

Compare the Steering Committee blank with the Maintainers blank, focusing on the differing “handle” box. Determine whether the field has an intended meaning or should be removed, then document the decision in the relevant governance template or documentation.

索引モデルが issue の本文から書いたものです。