New /fork command copies the current conversation into a new background session, letting you branch off to explore an idea or delegate work without interrupting the main thread.
Usage
/fork # fork with no initial prompt
/fork <prompt> # fork and immediately send the prompt to the copy
Details
The fork starts with your full conversation history up to this point.
The forked session runs as a background agent — check on it with claude attach or the agent view.
Cannot fork if session persistence is off, or if the session was started with certain launch flags (safe mode, custom system prompt, tool allowlist) that the copy wouldn't inherit.
The fork tip: "(← moves this session into the agent view too) · tip: /fork \<prompt\> starts the copy working right away"
Evidence
"Copy this conversation into a new background session and keep working here" (search for "fork" in command definitions)
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 agree/fork now copies your conversation into a new background session (its own row in claude agents) while you keep working; the in-session…
