The update changes the default model, refactors imports, and implements robust retry logic with exponential back‑off and clearer error messages. This improves resilience and clarifies usage. New Features - Exponential back‑off retry on 429/quota exhausted responses. - Configurable max_retries and retry_delay parameters. Enhancements - Default model set to gemini-2.5-flash. - Improved error output with actionable troubleshooting steps.