Document asset ID missing

A document has no string asset id, so it cannot be loaded as an addressable document. An import sidecar without its asset ID cannot supply an index entry.

#Common causes

• The top-level id was deleted, omitted or written as a non-string.
• An incomplete .import.json sidecar lacks its asset identity.

#Fixes

• Restore the original ID from the file's prior version so existing references continue to resolve.

• For a new document, assign an unused ID with the kind prefix shown in the diagnostic, then run ara check; preserve the ID on future edits.

• Code: ARA1213

• Constant: MISSING_DOC_ID

• Reported by: ara-doc, ara-host