Agent versions are retired in favor of change history
Agent versions, with publishing, semver, a default version and version pins,
are gone. A migration copies every saved version into the agent’s change
history as a revision. Channels, triggers, apps and session participants now
run the agent’s current configuration, and each new session records the
agent_revision it started on.
Version endpoints, CLI verbs and fields such as agent_version_id and
default_version_id are removed. To go back to an earlier configuration, use
History → Restore this point on the agent page or everruns history restore.