Content filter blocks benign queries ("live forever", Korean text)

Description

Content filtering policy blocks harmless queries, returning:
API Error: 400 invalid_request_error - Output blocked by content filtering policy

Reproduction

Queries that were blocked:

• "live fo"
• "live forever"
• "ㄴㅇㄹ" (random Korean keystrokes)
• "오아시스 안티있나" (asking about Oasis band)

Environment

• Platform: Linux (WSL2)
• Model: claude-opus-4-7
• Date: 2026-04-18