v2.1.131

Source: Anthropic Claude Code Date: 2026-05-06 URL: https://github.com/anthropics/claude-code/releases/tag/v2.1.131

Summary

Claude Code v2.1.131 was a targeted two-fix release. It resolved VS Code extension activation failure on Windows caused by a hardcoded build path in the bundled SDK’s createRequire polyfill, and fixed Mantle endpoint authentication failing with a missing x-api-key header. Both fixes unblocked specific deployment configurations rather than adding capability.

Implications

• Feeds the Claude Code reliability thread: the VS Code Windows fix is a distribution-level regression catch — it would have silently broken the IDE integration for all Windows VS Code users on that build.
• The Mantle auth fix is a signal that the Mantle API layer (used for some enterprise/internal routing configurations) is active enough to warrant a same-day patch, suggesting it is seeing real usage.