[BUG] claude-code-max, getting lots 400's after running fine for days

cont @TODO_MISSING_FEATURES.md

⎿  Read TODO_MISSING_FEATURES.md (631 lines)
⎿  API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"The request body is not valid JSON: invalid high surrogate in string: line 1 column 238422 (char 238421)"}}