Under the hood
Useful2 Signal4
Artifact auto-react now needs a live connection to the supervising host, not just its declared capabilities.
What's wrong with this entry?
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What
When Claude Code runs underneath a supervising host, a new piece of state tracks whether that connection is live, set false on connect, close and stop and true once the host's capabilities arrive. Artifact auto-react is now treated as available only when both those capabilities and a live link are present. Outside a supervised session the check returns early and nothing changes.
Evidence
rvSupervisorLinkLive
Strings lifted out of the shipped bundle, so the claim above can be checked against them.