session-fork

by @yamingmou

Duplicate any work-in-progress into an independent branch — not just conversations, but tasks, plans, code, writing and research. Context, confirmed conclusions, completed steps and tool results all come along; resume from any point while the original line stays untouched and keeps running. Note that a fork copies the session context only; workspace artifacts are not rolled back — unless they are version-controlled (e.g. git), only their final state exists.