Relying on moving sessions between browser, CLI, and remote runtimes is a…

Relying on moving sessions between browser, CLI, and remote runtimes is a brittle, unsafe foundation for browser agents. Provider-sealed state, encrypted compaction, hidden searches and response IDs make a transcript a foreign key into someone else’s database, so copying cookies or blobs only creates fragile, opaque continuity. You should design for renewable credentials, brokered auth, and device-aware session boundaries instead of cookie-copying hacks: mint short-lived tokens, require reauthorization for privileged actions, and keep session state describable and exportable so another runtime can reconstruct intent without a provider-only blob.