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Yiorgis Gozadinos 2026-01-12 17:21:41 +02:00
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CHANGELOG.md
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# Changelog # Changelog
## [Unreleased] ## [Unreleased]
### Added
- **Conversational RAG Application**: Full-stack application (`app/`) with CopilotKit frontend and pydantic-ai AG-UI backend
- Next.js frontend with chat interface, citation display, and visual grounding
- Starlette backend using pydantic-ai's native `AGUIAdapter` for streaming
- Docker Compose setup for development (`docker-compose.dev.yml`) and production
- Logfire integration for debugging LLM calls
- SSE heartbeat to prevent connection timeouts
- **Chat Agent** (`haiku.rag.agents.chat`): New conversational RAG agent optimized for multi-turn chat
- `create_chat_agent()` factory function for creating chat agents with AG-UI support
- `SearchAgent` for internal query expansion with deduplication
- `ChatDeps` and `ChatSessionState` for session management
- `CitationInfo` and `QAResponse` models for structured responses
- Natural language document filtering via `build_document_filter()`
- Configurable search limit per agent
- **Q/A History Management**: Intelligent conversation history with semantic ranking
- FIFO queue with 50 max entries
- Embedding cache to avoid re-embedding Q/A pairs
- `rank_qa_history_by_similarity()` returns top-K most relevant history entries
- Confidence filtering to exclude low-confidence answers from context
- **Conversational Research Graph**: Simplified single-iteration research graph for chat
- `build_conversational_graph()` optimized for conversational Q&A
- Context-aware planning (generates fewer sub-questions when history exists)
- `ConversationalAnswer` output type with direct answer and citations
### Changed ### Changed
- **BREAKING: Module Reorganization**: Consolidated all agent code under `haiku.rag.agents` - **BREAKING: Module Reorganization**: Consolidated all agent code under `haiku.rag.agents`
- Moved `haiku.rag.qa` → `haiku.rag.agents.qa` - Moved `haiku.rag.qa` → `haiku.rag.agents.qa`
- Moved `haiku.rag.graph.research` → `haiku.rag.agents.research` - Moved `haiku.rag.graph.research` → `haiku.rag.agents.research`
- Added `haiku.rag.agents.chat` module with conversational RAG agent (`create_chat_agent`, `SearchAgent`, `ChatDeps`, `ChatSessionState`) - Added `haiku.rag.agents.chat` module with conversational RAG agent
- Deleted `haiku.rag.graph` module (research graph now at `haiku.rag.agents.research.graph`) - Deleted `haiku.rag.graph` module (research graph now at `haiku.rag.agents.research.graph`)
### Removed ### Removed
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- Deleted `cli_chat.py` interactive chat module - Deleted `cli_chat.py` interactive chat module
- Research graph now uses `graph.run()` directly instead of `stream_graph()` - Research graph now uses `graph.run()` directly instead of `stream_graph()`
- For AG-UI streaming, use pydantic-ai's native `AGUIAdapter` with `ToolReturn` and `StateSnapshotEvent` (see `app/backend/` for example) - For AG-UI streaming, use pydantic-ai's native `AGUIAdapter` with `ToolReturn` and `StateSnapshotEvent` (see `app/backend/` for example)
- **AG-UI Research Example**: Removed `examples/ag-ui-research/` (replaced by `app/`)
## [0.25.0] - 2026-01-12 ## [0.25.0] - 2026-01-12