[BUG] The request body is not valid JSON: no low surrogate in string

Environment

• Platform (select one):
• [ x] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: 1.0.24 (Claude Code)
• Operating System: MacOs 15.5
• Terminal: Terminal App

Bug Description

API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"The request body is not valid JSON: no low surrogate in string: line 1 column 50086 (char 50085)"}}

Expected Behavior

Expect an answer from Claud Code. Instead,

Actual Behavior

it starts thinking and then outputs the above error.