/background
A Claude Code slash command, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.
Detach the current session to run as a background agent and free this terminal. Pass a prompt to send one more instruction before detaching. Monitor the session with claude agents. To copy the conversation into a new background session while this one keeps running, use /fork. Alias: /bg
Anthropic's own wording. Read off Commands, captured 2026-09-28.
In the changelogs
2Releases whose published page names /background.
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v2.1.311
Agent worktrees are no longer removed while another task is still working in them
When an agent's worktree is cleaned up, Claude Code now keeps it if another running or parked task is still working inside it
found in this entry's text
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v2.1.121
Disable Background Agents Fleet Setting
found in this entry's text
First cited
0No release's published evidence quotes this name. The ledger indexes the Evidence lines of every changelog on this site, so this says nobody here has ever quoted it; it says nothing about how old the name is.
Presence across releases
0The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.
Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the slash command does. All slash commands.