Claude Code VS Code extension freezes with multiple chat tabs? Workaround for Windows

If your Claude Code extension hangs/freezes when running multiple agents, then I feel your pain. The root cause appears to be multiple claude.exe processes fighting over ~/.claude.json with no file locking. Anthropic knows, the 2.0.61 changelog literally says: 2.0.61 Reverted VSCode support for multiple terminal clients due to responsiveness issues. They added multi-tab support, claim it broke, and they reverted it. Multiple tabs used to work fine for me before 2.0.61, now newer versions freeze constantly. Workaround: pin to 2.0.60 Install 2.0.60 from the VSIX and disable auto-update. This is the last version before the multi-client changes landed. Next problem: 2.0.60 has claude-opus-4-5-20251101 hardcoded and doesn't recognize Opus 4.6. Fix: patch the binary Close VS Code completely, then run in PowerShell: # Back up first $dir = " $ env : USERPROFILE \.vscode\extensions\anthropic.claude-code-2.0.60-win32-x64\resources\native-binary" Copy-Item " $dir \claude.exe" " $dir \claude.exe.b