Claude Code 2.1.70 fixes API compatibility, model responses, and Windows audio issues

Bug Fixes

This release resolves several high-impact issues affecting API compatibility and core functionality:

Third-party gateway support: Fixed API 400 errors when using ANTHROPIC_BASE_URL with third-party gateways by improving proxy detection for tool reference blocks
Bedrock compatibility: Resolved "This model does not support the effort parameter" errors when using custom Bedrock inference profiles or non-standard Claude model identifiers
Model response handling: Fixed empty model responses immediately after ToolSearch by correcting system-prompt-style tag rendering at the prompt tail
Windows audio: Fixed voice mode failures on Windows native binary and push-to-talk activation issues
SSH performance: Fixed Enter key inserting newlines instead of submitting on slow SSH connections
Text handling: Corrected clipboard corruption for non-ASCII text (CJK, emoji) on Windows/WSL using PowerShell Set-Clipboard

VS Code Integration Enhancements:

Added spark icon in 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 for enabling/disabling servers and managing OAuth authentication

Reduced prompt input re-renders by ~74% during turns
Reduced startup memory by ~426KB for users without custom CA certificates
Cut Remote Control polling from 1–2s to once per 10 minutes while connected, reducing server load ~300×
Improved compaction by preserving images in the summarizer request for faster, cheaper prompt cache reuse