You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
Cloud SessionsArea: what it touches
ImprovementsKind: in v2.1.242,
ImprovementsSection of the release
What
Starting a cloud session now forwards your custom system prompt, the text appended to subagent system prompts, your fallback model, your spending cap when it is above zero, and your allowed-tools list. Disallowed tools are sent as the full set rather than one legacy entry.
Details
Each field is sent only when set locally.
The create path also carries the initial prompt when it is withheld and a home-directory seed.
Evidence
append_subagent_system_prompt
Strings lifted out of the shipped bundle, so the claim above can be checked against them.