Version 6.4.0
=============

This release introduces RAG support for agents, optional attributes with default values, and a JSON object generator.

New Features
-------------

**RAG Support for Agents**

- New metamodel classes: ``RAG``, ``RAGVectorStore``, ``RAGTextSplitter``, and ``RAGReply``.
- ``Agent`` supports a ``rags`` list and ``new_rag()`` factory method.
- BAF template generates Chroma vector store setup, text splitter configuration, and ``session.run_rag()`` calls.
- Full round-trip support in JSON-to-BUML and BUML-to-JSON converters.

**Optional Attributes and Default Values**

- ``Property`` now supports ``is_optional`` and ``default_value`` (closes #428, #429).
- Propagated to Pydantic, SQLAlchemy, React, and Python class generators.
- Converters and BUML code builders handle ``isOptional`` / ``defaultValue``.

**LLM Reply Prompts**

- ``LLMReply`` and ``RAGReply`` accept an optional ``prompt`` parameter.
- Agent and user profile context is injected into LLM states during generation.

**Intent Descriptions**

- Intents now support a ``description`` field across metamodel, converters, and code builders.

**JSON Object Generator**

- New ``JSONObjectGenerator`` converts ``ObjectModel`` instances into JSON with proper type handling.

**Agent Template Improvements**

- Rewritten ``baf_agent_template.py.j2`` with reusable Jinja2 macros.
- LLM intent classification configuration support.
- New comprehensive static INI config template covering all platform sections.

Fixes
------

- Fix #428: ``is_optional`` attribute support for property definitions.
- Fix #429: ``default_value`` support for class attributes.
- Fix #432: REST API generator — class methods now have their body embedded in endpoints.
- Fix #433: Quantum editor — fixed gate placement offset from mouse cursor.
- Fix #437: Web App UI builder — fixed text cursor resetting in text components.
- Fix #398: Object diagram — fixed DateTime validation error.
- Fix #410: Python/REST API generators — method parameters support default values with type-aware quoting.
- Fix #407: Agent generator — custom Python code no longer breaks generation.
- BUML-to-JSON converter — enhanced attribute mapping for classes and abstract classes.
- Object diagram converter — improved attribute info with type, default value, and visibility.
- React generator — fixed double-brace escaping for inline JSX style objects.
- Python classes template — type-aware default value rendering.
- REST API template — guards for methods without a body definition.
- JSON schema generator — translated docstrings to English.
- Text parser — ``sanitize_text()`` escapes single quotes with backslash.

**Web Modeling Editor Fixes** (`BESSER-WEB-MODELING-EDITOR <https://github.com/BESSER-PEARL/BESSER-WEB-MODELING-EDITOR>`_)

- Fix WME#18: Fixed reversed text, missing live preview, and wrapping in AgentState code blocks.
- Fix WME#46: Buttons can link to methods inherited from abstract parent classes.
- Fix WME#47: Removed redundant home icon from toolbar.