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Author SHA1 Message Date
SamoilenkoVadym
86da0b2330 Implement OpenAI Responses API service with RAG enforcement 
Features:
- OpenAIService class for Responses API integration
- file_search tool integration with Vector Store
- Strict RAG-only enforcement via system instructions
- Citation validation to prevent hallucinations
- Warning logs for responses without proper citations
- Support for multi-turn conversations via previous_response_id
- Async streaming support for real-time responses
- Comprehensive error handling and logging

Test Coverage:
- Service initialization and configuration
- System instructions validation
- Citation detection (valid, missing, no-info responses)
- Search results formatting
- RAG usage validation with hallucination detection
- Response generation with mocked API calls
- Multi-turn conversation support
- Error handling
- Integration test stubs (skipped, require API key)

Key RAG Safety Features:
- Low temperature (0.3) for factual responses
- Citation keyword detection
- Automatic disclaimer for uncited responses
- Separate handling of valid "no info" responses
- Warning logs for potential hallucinations

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
 2026-01-27 14:26:43 +00:00
SamoilenkoVadym
a8151fbe66 Add comprehensive backend test suite and Phase 1 foundation 
Backend Tests:
- Add pytest configuration with async support (conftest.py)
- Add model tests: User, Conversation, Message, TokenUsage, Session, UserMemory
- Add configuration tests: Settings validation and environment variables
- Add API tests: Health endpoint and future endpoint stubs
- Add database tests: Connection, transactions, query execution

Phase 1 Foundation:
- FastAPI application structure with main.py
- SQLAlchemy async models for all entities
- Alembic migrations setup
- Configuration management via Pydantic Settings
- Logging system (English only)
- Docker multi-stage builds for backend
- Docker Compose orchestration (PostgreSQL, Redis, backend)
- Frontend React + TypeScript structure
- Dark & Gold theme CSS implementation
- Environment configuration examples

All code and comments in English as per requirements.
Tests cover model relationships, cascade deletes, and constraints.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
 2026-01-27 14:24:59 +00:00