Follow Discord
Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial
Home / Reference / Environment variables

CLAUDE_CODE_DIR_SYNC_OVERLAY

env never mined JSON

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

CLAUDE_CODE_DIR_SYNC_DISABLE_ANCHORING turns off path anchoring, and seven sync variables are now stripped from child processes.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.239.

First seen — never in a mined build
Last seen — never in a mined build
Builds0 / 150on this box, as of v2.1.309
Written about v2.1.239 first named in a changelog, 21 Aug 2026

In the changelogs

3

Releases whose published page names CLAUDE_CODE_DIR_SYNC_OVERLAY.

  1. v2.1.242
    Cloud directory sync gains git and tar-archive engines beside the per-file lane

    Cloud file sync gains git-bundle and tar-archive modes, but you still sync file by file.

    found in this entry's text

  2. v2.1.239
    Directory-sync anchoring can be switched off, plus seven dir-sync variables now stripped from child processes

    CLAUDE_CODE_DIR_SYNC_DISABLE_ANCHORING turns off path anchoring, and seven sync variables are now stripped from child processes.

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

  3. v2.1.239
    Sync and hook-forwarding switches now survive into remote sessions

    Seven more environment variables you export locally now carry into remote and worker processes.

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

First cited

1

The earliest release whose published evidence quoted CLAUDE_CODE_DIR_SYNC_OVERLAY was v2.1.239, 21 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
v2.1.23921 Aug 2026CLAUDE_CODE_DIR_SYNC_OVERLAY

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 environment variable does. All environment variables.

Feedback