Claude Code v2.1.132: SIGINT Fix, MCP Memory Leak, Bedrock/Vertex Prompt Caching Fix

Anthropic

Tools official 1 src. ~1 min

Claude Code v2.1.132 (May 6) adds CLAUDE_CODE_SESSION_ID env var for Bash subprocesses and CLAUDE_CODE_DISABLE_ALTERNATE_SCREEN opt-out flag. Critical fixes: external SIGINT handling for IDE stop buttons, blank screen after laptop sleep or Ctrl+Z/fg, unbounded memory growth from non-protocol MCP server output, and Bedrock/Vertex 400 errors with prompt caching. Companion v2.1.131 fixed VS Code extension activation on Windows and Mantle endpoint authentication.

Why it matters

The MCP memory-growth fix and Bedrock/Vertex prompt-caching fix directly unblock enterprise deployments; the SIGINT and fullscreen fixes resolve long-standing terminal workflow pain points.

Importance: 2/5

Patch release fixing high-impact MCP memory leak and Bedrock/Vertex prompt caching errors affecting enterprise users

claude-code release mcp cli bug-fix

Sources

official Releases — anthropics/claude-code (v2.1.132, v2.1.131)