Imports github.com/google/uuid github.com/openai/openai-go github.com/anthropics/anthropic-sdk-go github.com/anthropics/anthropic-sdk-go/packages/ssestream github.com/openai/openai-go/packages/ssestream google.golang.org/genai github.com/openai/openai-go/packages/param Standard library imports encoding/base64 encoding/json fmt io net/http strings iter