Overview

This Claude Code v2.1.39 release focuses on stability and reliability improvements, addressing critical crashes, process hanging issues, and model configuration problems that were affecting user workflows.

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Changes by Version

v2.1.39

  • Added guard against launching Claude Code inside another Claude Code session
  • Fixed Agent Teams using wrong model identifier for Bedrock, Vertex, and Foundry customers
  • Fixed crash when MCP tools return image content during streaming
  • Fixed /resume session previews showing raw XML tags instead of readable command names
  • Improved model error messages for Bedrock/Vertex/Foundry users with fallback suggestions
  • Improved terminal rendering performance
  • Fixed fatal errors being swallowed instead of displayed
  • Fixed process hanging after session close
  • Fixed character loss at terminal screen boundary
  • Fixed blank lines in verbose transcript view