1.4.0

What's Changed

Features

• Add support for non-AST plot routes
• Implement first-class support for MCP
• Add Pydantic validation dunder to BaseInterceptor
• Add support for LLM message interceptor hooks
• Cache i18n prompts for efficient use
• Enhance QdrantVectorSearchTool

Bug Fixes

• Fix issues with keeping stopwords updated
• Resolve unpickleable values in flow state
• Ensure lite agents course-correct on validation errors
• Fix callback argument hashing to ensure caching works
• Allow adding RAG source content from valid URLs
• Make plot node selection smoother
• Fix duplicating document IDs for knowledge

Refactoring

• Improve MCP tool execution handling with concurrent futures
• Simplify flow handling, typing, and logging; update UI and tests
• Refactor stop word management to a property

Documentation

• Migrate embedder to embedding_model and require vectordb across tool docs; add provider examples (en/ko/pt-BR)

Contributors

@danielfsbarreto, @greysonlalonde, @lorenzejay, @lucasgomide, @tonykipkemboi