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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.

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Claude Code v2.1.131

3 entries read diff v2.1.129 → v2.1.131 Markdown

Claude Code 2.1.131 is a small maintenance release with no new CLI commands, flags, settings, or visible tips detected in the diff from 2.1.129. The user-facing changes are concentrated in API plumbing: bundled file operations now target stable Files API paths, and API-client authentication errors now describe the supported auth inputs more directly.

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Changesopen

Stable Files API Paths#

What

Bundled Anthropic file operations now call the stable /v1/files endpoints instead of beta-suffixed file URLs.

Usage
claude
Details
  • This affects internal/API-backed file list, upload, download, metadata, and delete calls.
  • Existing Claude Code workflows should not need new flags or settings.
  • The old implementation used /v1/files?beta=true and /v1/files/{id}/content?beta=true; the new implementation uses /v1/files and /v1/files/{id}/content.
Evidence

Files API client paths changed from beta URLs to stable URLs (search for "/v1/files" and "/v1/files?beta=true").

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Clearer API Authentication Error#

What

When the bundled Anthropic API client cannot resolve credentials, the error now says it expects either apiKey or authToken, instead of listing removed credential/profile/config options.

Usage
ANTHROPIC_API_KEY=... claude
Details
  • This makes auth failures less misleading for users who hit lower-level API-client errors.
  • The new message points users toward API key or bearer-token authentication.
  • The previous message referenced credentials, config, and profile; those are no longer listed in the failure text.
Evidence

Authentication validation message changed (search for "Could not resolve authentication method. Expected either apiKey or authToken to be set").

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Bundled Beta SDK Surface Cleanup#

Several bundled beta Anthropic SDK resources were removed from the CLI package, including generated client bindings for managed agents, sessions, environments, vaults, memory stores, and user profiles. This appears to be cleanup of packaged SDK internals rather than a new Claude Code CLI workflow: no corresponding new slash command, flag, setting, or tip was added in this release.

Evidence

Removed beta client routes include "/v1/agents?beta=true", "/v1/sessions?beta=true", "/v1/vaults?beta=true", "/v1/memory_stores?beta=true", and "/v1/user_profiles?beta=true".

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Verbatim
Official · Anthropic

Anthropic’s official release notes

Published verbatim by Anthropic for v2.1.131. Text is unmodified from the upstream changelog. Everything else on this page came out of the bundle instead, which is why the two lists don't match.

  • Fixed VS Code extension failing to activate on Windows due to a hardcoded build path in the bundled SDK (createRequire polyfill bug)
  • Fixed Mantle endpoint authentication failing with missing x-api-key header
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