A new tool (built from object bu, wired into the tool table as wi.watch, wi.unwatch, wi.resume_replies, wi.watches) lets Claude watch a published artifact for republishes and comments, stop watching, check watch status, and resume previously-stopped automatic comment replies.
It has extensive permission logic: it denies resuming auto-replies entirely in remote sessions ("Resuming auto-replies is a live-session action... use action "watch" to re-register one"), denies it if the user disarmed auto-replies session-wide ("the kill-all-agents gesture"), and asks for explicit user confirmation the first time an artifact is watched or when auto-replies would be turned on.
A new validator also rejects watch action calls that specify a path not resolvable to a live file, returning a dedicated invalid-path error instead of silently accepting it.