Define the fields a kind of note has, and where new ones go.
A type describes a kind of note: its fields, its icon, the folder new ones land in, and the body they start from.
Open the type editor and add a type. Give it:
You can. Add a field to project, change what status may be, point it at a
different folder. The shipped definition stays as the factory setting your
version is compared against, so you can always see what you changed.
.mindex/types/<id>.md in the vault. It is a file: commit it, diff it, copy it
to another vault.
Mindex regenerates the types skill after a change, so the agent working in your vault knows about the field you just added. See Skills.
A note missing a required field is not rejected, and a key the type has never heard of is not stripped. The type decides what is shown, not what is permitted.