OptionaldescriptionOptionaltransientTransient keys live with the live session, not the character: held
in an in-memory store that is never persisted (so they reset to the
default on a fresh login) and never round-trips through the Hydrator.
Used for ephemeral UI scoping like per-bar input modes. Defaults to
persisted (false/absent).
Optionalvalidator
One client-state schema entry. Declared in
HasInteractiveMixin.clientStateSchema.keyis the dotted string the client uses ('console.tabs', …);defaultValueis surfaced when the host has not written that key yet; optionalvalidatorrejects bad writes (none ship in v1).If the schema ever grows past the point where a single TS array is comfortable, externalize it (YAML / a per-feature mixin with a walker / …). Until then, one array, one place.