[BUG] API Error: Expected ',' or '}' after property value in JSON at position 129 (line 1 column 130)

Environment

• Platform (select one):
• [x] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: <!-- output of claude --version --> 0.2.50
• Operating System: <!-- e.g. macOS 14.3, Windows 11, Ubuntu 22.04 --> macOS 15.1.1
• Terminal: <!-- e.g. iTerm2, Terminal App --> iTerm2

Bug Description

<!-- A clear and concise description of the bug -->
I ask claude-code to fix a bug like the below and occasionally I get this error:

> not what I want help me fix in the query-expander where this bug is from
  ⎿  API Error: Expected ',' or '}' after property value in JSON at position 129 (line 1 column 130)

Steps to Reproduce

1. <!-- First step --> Modify some code python or typscript
2. <!-- Second step --> Ask claude to fix bug

Expected Behavior

<!-- What you expected to happen -->
No API error

Actual Behavior

<!-- What actually happened -->
API error

Additional Context

<!-- Add any other context about the problem here, such as screenshots, logs, etc. -->