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Claude Code 2.1.70 fixes proxy gateway support and model compatibility issues
Claude Code · releasebugfixfeatureperformanceplatform · github.com ↗

Key Fixes

Claude Code 2.1.70 addresses several high-impact bugs that affected proxy gateway compatibility and model inference:

  • Proxy Gateway Support: Fixed API 400 errors when using ANTHROPIC_BASE_URL with third-party gateways. Tool search now correctly detects proxy endpoints and disables tool_reference blocks to ensure compatibility.
  • Custom Model Support: Resolved "This model does not support the effort parameter" errors when using custom Bedrock inference profiles or non-standard Claude model identifiers.
  • Response Quality: Fixed empty model responses after ToolSearch by improving how tool schemas are rendered in the prompt to prevent early model termination.
  • Prompt Caching: Fixed prompt-cache invalidation when an MCP server with instructions connects after the first turn.

Windows Stability Improvements

Multiple Windows-specific issues have been resolved:

  • Fixed clipboard corruption for non-ASCII text (CJK, emoji) by switching to PowerShell Set-Clipboard
  • Fixed extra VS Code windows opening at startup when running from the integrated terminal
  • Fixed voice mode failing with "native audio module could not be loaded" on Windows native binary
  • Improved SSH connection handling to prevent Enter key inserting newlines instead of submitting commands

UI & UX Enhancements

  • Added spark icon in VS Code activity bar listing all Claude Code sessions, with sessions opening as full editors
  • Added full markdown document view for plans with comment support for feedback
  • Added native MCP server management dialog accessible via /mcp command to enable/disable servers and manage OAuth without terminal switching
  • Fixed /color command to support reset options (/color default, /color gray, /color reset, /color none)

Performance & Platform Improvements

  • Reduced prompt input re-renders by approximately 74%
  • Reduced startup memory by ~426KB for users without custom CA certificates
  • Optimized Remote Control /poll rate from 1–2s to once per 10 minutes (300× server load reduction)
  • Fixed skill listing re-injection on every --resume (~600 tokens saved per resume)
  • Improved image preservation during compaction for faster prompt cache reuse