What
A new tool works on comment threads left by viewers of a published artifact. It supports reading threads (paged by thread id and cursor), posting a reply, and marking a thread resolved. Resolving is refused entirely in plan mode, and reading comments after an unattended new-comments notification asks you to confirm even in channels that normally auto-allow.
Details
- Replies are validated before sending: invisible and control characters are rejected, byte length is capped, and repeated identical answers are blocked.
- Comment text comes from artifact viewers, so the confirmation prompt names that explicitly when the read was triggered by a notification rather than by you.
Evidence
Claude wants to read the comment threads on ${ro(o)} — prompted by the new-comments notification; comment text is written by artifact viewers
Strings lifted out of the shipped bundle, so the claim above can be checked against them.