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Sweep 28 Aug 2026 · 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.250 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_BG_AUTH_SNAPSHOT_PATH

A Claude Code environment variable, read out of the shipped bundle. It has been in the build since v2.1.142, including the newest one read.

What it is

Bridge-spawned child sessions no longer inherit your credential environment variables.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.238.

Presence across releases

ReleasesReadingDeclared typeDefault
2.1.245 – 2.1.250 5 releases never mined — —
2.1.210 – 2.1.243 33 releases in the build str —
2.1.142 – 2.1.209 58 releases in the build — —

A row reading never mined is a release with no archived bundle behind it. Nothing was read out of it, so nothing here says whether the name was in it. A declared type or a default is only ever what that release's own bundle stated.

Changelog entries naming it

  1. v2.1.238Bridge-spawned sessions start with credentials stripped from their environment

    Bridge-spawned child sessions no longer inherit your credential environment variables.

    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_bg, up to twelve of them.

CLAUDE_BG_BACKENDNo description from anybody. 2.1.138 CLAUDE_BG_CLAIM_AUTHNo description from anybody. 2.1.169 CLAUDE_BG_ISOLATIONBackground worktree isolation now reads CLAUDE_BG_ISOLATION from a captured environment copy. 2.1.138 CLAUDE_BG_MEMORY_TOGGLED_OFFNo description from anybody. 2.1.147 CLAUDE_BG_POST_CLEAR_RESPAWNNo description from anybody. 2.1.193 CLAUDE_BG_PTY_AUTHNo description from anybody. 2.1.169 CLAUDE_BG_RENDEZVOUS_SOCKNo description from anybody. 2.1.138 CLAUDE_BG_RV_AUTHNo description from anybody. 2.1.169 CLAUDE_BG_SESSION_PERMISSION_RULESNo description from anybody. 2.1.146 CLAUDE_BG_SOCKET_TOKENS_PATHNo description from anybody. 2.1.169 CLAUDE_BG_SOURCENo description from anybody. 2.1.138 CLAUDE_BG_STARTUP_WEDGE_MSNo description from anybody. 2.1.138

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.