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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
Home / Reference / CLI flags

--autocompact

cli never mined documented JSON

A Claude Code CLI flag, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.

Set the auto-compact window for this session without changing your saved settings. Accepts the same values as /autocompact; that section covers the value forms and what overrides the flag. Requires Claude Code v2.1.221 or later

Anthropic's own wording. Read off CLI reference, captured 2026-09-26.

First seen — never in a mined build
Last seen — never in a mined build
Builds0 / 149on this box, as of v2.1.308
Written about v2.1.122 first named in a changelog, 28 Apr 2026

In the changelogs

3

Releases whose published page names --autocompact.

  1. 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, found in this entry's text

  2. v2.1.221
    New --autocompact flag for the auto-compact window

    You can set the auto-compact window at launch with --autocompact, using auto or 100k to 1M.

    named in this entry, found in this entry's text

  3. v2.1.122

    found in this entry's text

First cited

1

The earliest release whose published evidence quoted --autocompact was v2.1.221, 3 Aug 2026. That is the oldest release this project wrote about it, so it is a floor on the name's age and not the release that introduced it. It is not a presence reading: which builds carried the name is the table below.

ReleaseDateThe span that was quoted
v2.1.2213 Aug 2026--autocompact <auto|tokens>

Presence across releases

0

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.

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 CLI flag does. All CLI flags.

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