[BUG] print mode (-p) doesn't seem to be using my claude max subscription, instead pulling an API key from the environment

Environment

• Platform (select one):
• [x] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: 1.0.43 (Claude Code)
• Operating System: macos 15.3.1
• Terminal: ghostty

Bug Description

Running a command like: claude -p --output-format stream-json --verbose "hello there" is deducting from my API key despite me being logged into my claude max subscription locally. This should instead authorize via my claude max subscription (which I'm already logged into), instead of pulling from the ambient ANTHROPIC_API_KEY variable.