`/autocompact`

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.

What it is

Set the auto-compact window: how full the context window gets before Claude Code compacts automatically. Pass a size such as 500k, or auto to return to the window tuned for your model. Claude Code saves the value to user settings and applies it to the current session. See [Set the auto-compact window](/docs/en/model-config#set-the-auto-compact-window) for accepted values and what overrides it. Without an argument, opens a dialog that shows the current window. Requires Claude Code v2.1.221 or later

Anthropic's own wording. Read off Commands, captured 2026-08-28.

Presence across releases

The 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.

Changelog entries naming it

v2.1.221/autocompact ungated, plus an --autocompact CLI option
You can now set when auto-compaction kicks in with a new --autocompact flag, and /autocompact works for everyone.

named in this entry

Documentation pages

Commands reference table Claude Code CLI
Claude Code changelog mentions it Claude Code CLI
Use Claude Code on the web mentions it Claude Code CLI
CLI reference mentions it Claude Code CLI
Explore the context window mentions it Claude Code CLI
Environment variables mentions it Claude Code CLI
Model configuration mentions it Claude Code CLI
Continue local sessions from any device with Remote Control mentions it Claude Code CLI
Claude Code settings mentions it Claude Code CLI
Claude Code settings reference mentions it Claude Code CLI

A reference table page is one whose own table defines this name, and it is where the description above came from. A page that mentions it carries the name somewhere in its text and may say nothing about it at all. Every page carrying it.

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.