@onlyworlds/sdk 4.40.0

The "known of" stub's client half (keel PR 113, B16; keel #421 §7g), live in production since 2026-10-20 13:47.

Added

• known_of?: true on OwElementBase (generated; SCHEMA.md says it too): present, and true, only on a
  stub, an element a guest or player reaches only through its own Character's sheet, one step out. A stub
  keeps id, type, name, description, supertype, subtype, image_url, created_at, updated_at
  and change_seq; every other field reads unset ("", null, []), created_by, changed_by and
  changed_via are null, it has no extension fields, and its files are 404. For Lantern and Atlas, which
  render stubs (Temper).
• isKnownOf(el): true only for known_of: true; absent or anything else is a whole element.

Changed

• A stub is never written: upsert, patch, create and bulk throw a TypeError before sending a
  body with known_of: true (bulk names the item, and sends none of the batch). Stripping the marker would
  turn keel's 422 into a write that blanks the element for any key that may write it (an owner pushing a
  player's copy). known_of joins the strip list, so any other value of it is never sent.