API key authentication for Minimax LLM within an Anthropic-compatible framework.

This issue reveals a common developer struggle: API key authentication failures when integrating third-party LLMs (Minimax) into a system initially designed for another (Anthropic). The developer confirms the Minimax API key works locally, but fails within the `claude-code-haha` environment, despite attempts to use both `ANTHROPIC_API_KEY` and `ANTHROPIC_AUTH_TOKEN`. This indicates a mismatch in expected authentication headers or environment variable parsing within the codebase, or a fundamental incompatibility in how Minimax handles Anthropic-style authentication. The pain point is the lack of clear, consistent authentication standards across LLM providers, forcing developers into trial-and-error configuration. This creates significant integration overhead and delays, highlighting the market need for standardized, robust API authentication mechanisms or universal API gateways for LLM access.