You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
System PromptArea: what it touches
ImprovementsKind: in v2.1.248,
What probably matters to youSection of the release
What
Four instruction fragments were added: the model must not use AppleScript, System Events or shell commands to fake clicks and keystrokes, must not save files into shell startup files, ssh keys or launch agents, must not claim it is editing an artifact page, and must not make tool calls during an analysis or summary step.
Details
These are prompt text, so they shape behaviour rather than hard-blocking the actions.
Evidence
System Events, shell commands, or any other method to send clicks or keystrokes to this app.
Strings lifted out of the shipped bundle, so the claim above can be checked against them.