When a link supplies a long prompt that exceeds the viewport height, users now see a character count and explicit scroll instruction: "The prompt below ({N} chars) was supplied by the link — scroll to review the entire prompt before pressing Enter."
Evidence
Long prompt display (search for "scroll to review the entire prompt")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agreeDeep link queries (claude-cli://open?q=…) now support up to 5,000 characters, with a "scroll to review" warning for long pre-filled prompts
