- Replace LangChain dependencies with native OpenAI and Google Generative AI SDKs
- Rewrite LLMService to use direct API calls for OpenAI and Gemini
- Update core package dependencies to remove LangChain-related packages
- Modify message handling and streaming logic to work with new SDK implementations
- Simplify model configuration and instance management
- Update integration and unit tests to support new SDK approach
- Remove LangChain-specific message conversion and streaming methods
- Update Vitest configuration to dynamically load environment variables
- Add dotenv configuration in test setup files
- Modify integration test files to use process.env instead of import.meta.env
- Add logging for environment variable status in test files
- Improve test configuration for different LLM service integrations
- Remove redundant integration and unit test files from web package
- Update import paths in remaining test files to use local source
- Remove console logs and unnecessary comments in test files
- Simplify test structure and remove duplicate test scenarios
- Add dotenv dependency to core package for environment variable support
linshen