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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_CODE_USE_CCR_V2

A Claude Code environment variable, read out of the shipped bundle. It was in the build from v2.1.138 and was gone by v2.1.203.

What it is

Nobody has written a line about this one. It is not in any of Anthropic's reference tables and no changelog entry here carries a description of it. It is in the build, which is the whole of what this page can claim.

Presence across releases

ReleasesReadingDeclared typeDefault
2.1.245 – 2.1.250 5 releases never mined — —
2.1.203 – 2.1.243 40 releases not in the build — —
2.1.160 – 2.1.202 35 releases in the build bool —
2.1.138 – 2.1.159 20 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

No changelog entry here has ever named it. That is a statement about what has been written, not about the name: it has been in the build since v2.1.138 without anybody writing a line about it.

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_use, up to twelve of them.

CLAUDE_CODE_USE_ANTHROPIC_AWSNo description from anybody. 2.1.138 CLAUDE_CODE_USE_ANTHROPIC_GOOGLE_CLOUDNo description from anybody. 2.1.213 CLAUDE_CODE_USE_BEDROCKNo description from anybody. 2.1.138 CLAUDE_CODE_USE_COWORK_PLUGINSNo description from anybody. 2.1.138 CLAUDE_CODE_USE_FOUNDRYNo description from anybody. 2.1.138 CLAUDE_CODE_USE_GATEWAYCLAUDE_CODE_USE_GATEWAY now passes down to spawned agent processes, so gateway routing is no longer dropped. 2.1.195 CLAUDE_CODE_USE_MANTLENo description from anybody. 2.1.138 CLAUDE_CODE_USE_NATIVE_FILE_SEARCHNo description from anybody. 2.1.160 CLAUDE_CODE_USE_POWERSHELL_TOOLNo description from anybody. 2.1.138 CLAUDE_CODE_USE_VERTEXNo description from anybody. 2.1.138 CLAUDE_CODE_USER_DIALOG_TIMEOUT_MSSet dialogExpiry to control how long a forwarded permission prompt waits before resolving to its safe default. 2.1.169 CLAUDE_CODE_USER_EMAILNo 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.