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Sweep 28 Aug 2026 · 16:06Z Build v2.1.251 479 read Stable v2.1.236 Latest v2.1.251 Next v2.1.251 Feeds RSS JSON llms.txt

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

Reference / Environment variables

CLAUDE_CODE_DIR_SYNC_STREAM

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.

What it is

More environment variables get carried into remote sessions; none are set by default.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.248.

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

  1. v2.1.251Directory-sync streaming keyed off an environment variable

    Directory sync streams changes live unless you set an environment variable to turn streaming off.

    named in this entry

  2. v2.1.248More environment variables carried into remote sessions

    More environment variables get carried into remote sessions; none are set by default.

    named in this entry

Documentation pages

None of Anthropic's documentation pages this site has a copy of carries this name.

Names beside it

Every environment variable in the inventory starting claude_code_dir_sync, up to twelve of them.

CLAUDE_CODE_DIR_SYNC_ARCHIVECLAUDE_CODE_DIR_SYNC_DISABLE_ANCHORING turns off path anchoring, and seven sync variables are now stripped from child processes. 2.1.242 CLAUDE_CODE_DIR_SYNC_DISABLE_ANCHORINGCloud file sync writes through directory handles so a swapped symlink can't redirect it, and says when that's unavailable. 2.1.239 CLAUDE_CODE_DIR_SYNC_ENGINESet CLAUDE_CODE_LEGACY_BUNDLE to true to go back to the old single-file build shape. 2.1.242 CLAUDE_CODE_DIR_SYNC_FFWDSet CLAUDE_CODE_LEGACY_BUNDLE to true to go back to the old single-file build shape. 2.1.242 CLAUDE_CODE_DIR_SYNC_GITYou can set CLAUDE_CODE_DIR_SYNC_GIT to pick a git-based engine for syncing your directory to a cloud session. 2.1.239 CLAUDE_CODE_DIR_SYNC_OVERLAYCLAUDE_CODE_DIR_SYNC_DISABLE_ANCHORING turns off path anchoring, and seven sync variables are now stripped from child processes. 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.