What probably matters to youSection of the release
What
A session can now watch a Claude artifact by id or claude.ai URL and be notified when new versions and comments arrive. --watch-artifact-no-autoreact starts the same watch with auto-reply disarmed. Both are registered hidden, so they do not show up in --help. Startup refuses them in non-interactive, print, --sdk-url, --init-only and redirected sessions, and in sessions attached to a remote environment, each with its own error text.
Details
A malformed value produces an artifact-id/URL error; a URL belonging to a different environment is rejected against the one you are signed in to.
Neither flag string appears in the previous build.
Usage
claude --watch-artifact https://claude.ai/...
Evidence
Error: --watch-artifact is not available in sessions attached to a remote environment \u2014 run it in a plain local session
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
