FAQ

Q: undefined is not an object (evaluating 'usage.input_tokens')

Cause: ANTHROPIC_BASE_URL is misconfigured. The API endpoint is returning HTML or another non-JSON format instead of a valid Anthropic protocol response.

This project uses the Anthropic Messages API protocol. ANTHROPIC_BASE_URL must point to an endpoint compatible with Anthropic's /v1/messages interface. The Anthropic SDK automatically appends /v1/messages to the base URL, so:

• MiniMax: ANTHROPIC_BASE_URL=https://api.minimaxi.com/anthropic ✅
• OpenRouter: ANTHROPIC_BASE_URL=https://openrouter.ai/api ✅
• OpenRouter (wrong): ANTHROPIC_BASE_URL=https://openrouter.ai/anthropic ❌ (returns HTML)

If your model provider only supports the OpenAI protocol, you need a proxy like LiteLLM for protocol translation. See the Third-Party Models Guide.

Q: Cannot find package 'bundle'

error: Cannot find package 'bundle' from '.../claude-code-haha/src/entrypoints/cli.tsx'

Cause: Your Bun version is too old and doesn't support the required bun:bundle built-in module.

Fix: Upgrade Bun to the latest version:

bun upgrade

Q: How to use OpenAI / DeepSeek / Ollama or other non-Anthropic models?

This project only supports the Anthropic protocol. If your model provider doesn't natively support the Anthropic protocol, you need a proxy like LiteLLM for protocol translation (OpenAI → Anthropic).

See the Third-Party Models Guide for detailed setup instructions.