A chapter attaches to a version rather than to an artifact, so the first version
is the parent of everything a group later translates. It was not signed. Every
device rebuilt it from the artifact on arrival, which put a row on disk naming
the group as its author and carrying no signature to show for it -- a parent
vouched for by its own signed children rather than the other way round.
The reason was written into both ends: a first version proposed on its own would
cost a second quorum for one form. That is an argument against a second session,
and it stopped being an argument at all once a batch existed. `proposeSigningBatch`
is one ceremony, one approval and one transcript whatever k is.
The same reasoning was already overturned once, for the same shape. A chapter's
chunks were briefly derived from the signed chapter's text for exactly this
reason, and they carry their own signatures now. The artifact version is the case
that was left behind, and it needs the same form: `ArtifactVersionEvent` names the
artifact it is of, and that id is a hash over the group's key at the room's path,
so it cannot be known until the proposal is authored. `initialVersionOf` takes the
lead the session built, mirroring `ChunkEvent.splitOf`, and the artifact is item 0
because a version row whose artifact does not exist yet is a foreign key
violation.
Two things had to move with it, and both would have been silent.
`ChatMessage.applyInnerEvent` no longer derives a version under an artifact. The
derived row and the signed one hash differently -- different author, different
timestamp -- so keeping both would have stood two versions against one artifact
and let a chapter hang off whichever it found.
The `ArtifactVersionEvent` arm no longer writes a chat line. It never used to
reach one: a derived version wrote nothing. Signed, it would have put "Added 1.0
to artifact versions" under every "Added In Detention to artifacts", which is the
noise the chunk arm already declines to make beside a chapter.
An artifact signed before this keeps a version label nothing turns into a row, so
its version does not appear. That is what the chapter's chunks cost too.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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