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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_OAUTH_TOKEN

A Claude Code environment variable, read out of the shipped bundle. It has been in the build since v2.1.138, including the newest one read.

What it is

OAuth access token for claude.ai authentication. Alternative to /login for SDK and automated environments. Takes precedence over keychain-stored credentials. Generate one with [claude setup-token](/docs/en/authentication#generate-a-long-lived-token). Unless you run [/login](/docs/en/authentication#authentication-precedence), Claude Code uses the token you set for the whole session. To replace an expired token, generate a new one and restart

Anthropic's own wording. Read off Environment variables, captured 2026-08-28.

Presence across releases

ReleasesReadingDeclared typeDefault
2.1.245 – 2.1.250 5 releases never mined — —
2.1.160 – 2.1.243 75 releases in the build str —
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

  1. v2.1.246Credentials are primed through the store at start-up

    Login tokens are warmed at startup, and skipped entirely for token-based auth.

    named in this entry

  2. v2.1.234The CLAUDE_CODE_OAUTH_TOKEN login warning can arrive as its own message

    The warning about a set OAuth token env var can now arrive as its own message after login.

    named in this entry

  3. v2.1.229/login warns if an OAuth token is set in your environment

    After logging in, you're warned if an OAuth token in your environment will override it later.

    named in this entry

  4. v2.1.229OAuth token warning no longer tells you to unset the variable

    The OAuth token login warning now correctly says your session switches to the new credentials.

    named in this entry

  5. v2.1.225OAuth 401 recovery no longer silently replaces a user-supplied token

    Your explicitly set OAuth token is no longer silently swapped for a stored credential after a 401.

    named in this entry

  6. v2.1.223Clearer failures when claude.ai project scopes can't be obtained

    When project permissions fail, you now get a specific reason and advice instead of a vague error.

    named in this entry

  7. v2.1.223Settings-supplied API and credential env vars are stripped when ANTHROPIC_UNIX_SOCKET is set

    When you connect through a unix socket, settings files can no longer override your API keys or endpoint.

    named in this entry

  8. v2.1.221Artifact credentials and artifact base URLs are stripped from child process environments

    Artifact tokens and artifact base URLs no longer leak into processes Claude spawns.

    named in this entry

Documentation pages

A reference table page is one whose own table defines this name, and it is where the description above came from. A page that mentions it carries the name somewhere in its text and may say nothing about it at all. Every page carrying it.

Names beside it

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

CLAUDE_CODE_OAUTH_401_WAIT_MSNo description from anybody. 2.1.163 CLAUDE_CODE_OAUTH_CLIENT_IDNo description from anybody. 2.1.138 CLAUDE_CODE_OAUTH_REFRESH_TOKENOAuth refresh token for Claude.ai authentication. When set, claude auth login exchanges this token directly instead of opening a browser. Requires CLAUDE_CODE_OAUTH_SCOPES. Useful for provisioning authentication in automated environments 2.1.138 CLAUDE_CODE_OAUTH_SCOPESSpace-separated OAuth scopes the refresh token was issued with, such as "user:profile user:inference user:sessions:claude_code". Required when CLAUDE_CODE_OAUTH_REFRESH_TOKEN is set 2.1.138 CLAUDE_CODE_OAUTH_TOKEN_FILE_DESCRIPTORLogin tokens are warmed at startup, and skipped entirely for token-based auth. 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.