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Claude Code 2.1.81 adds channel permission relay and fixes OAuth re-authentication
Claude Code · releasebugfixfeatureintegrationapi · github.com ↗

Key Additions

Claude Code 2.1.81 introduces new capabilities for enterprise deployments and external integrations:

  • Channel Permission Relay: Channel servers can now declare permission capability to forward tool approval prompts to your phone, enabling external systems to participate in approval workflows
  • Bare Flag for Scripting: The new --bare flag optimizes -p calls for scripting by skipping hooks, LSP, plugin sync, and skill directory walks. This requires explicit ANTHROPIC_API_KEY or apiKeyHelper configuration; OAuth and keychain auth are disabled, and auto-memory is fully disabled

Critical Fixes

This release addresses several high-priority stability issues:

  • Concurrent Session Authentication: Fixed OAuth token refresh causing repeated re-authentication failures across multiple Claude Code sessions
  • Voice Mode Stability: Corrected silent failure in retry logic that previously showed misleading "check your network" messages; fixed audio not recovering when server drops WebSocket connection
  • Proxy Gateway Compatibility: Fixed CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS not suppressing structured-outputs beta header, preventing 400 errors on Vertex/Bedrock proxy gateways

Additional Improvements

  • Session Management: Resuming sessions now switches back to the original git worktree; Remote Control sessions derive titles from first prompt instead of showing generic text
  • MCP Enhancements: Updated MCP OAuth to support Client ID Metadata Document (CIMD/SEP-991); read/search tool calls collapse into single "Queried {server}" lines (expandable with Ctrl+O)
  • Plugin System: Ref-tracked plugins now re-clone on every load to pick up upstream changes; improved plugin tips with CLI tool usage detection
  • Terminal & UI: Improved bash mode discoverability with suggestions for interactive commands; fixed terminal tab titles updating with auto-generated session descriptions; plan mode now hides "clear context" by default
  • Windows Support: Fixed Windows PATH inheritance for Bash tool when using Git Bash; disabled line-by-line response streaming on Windows/WSL due to rendering issues

Additional fixes address race conditions in background tasks, voice paste timing issues, and permission prompt behavior.