Sprint 27: Cross-Meeting RAG

Size: M | Owner: Backend + Client | Phase: 5 - Platform Evolution Effort: ~1 sprint | Prerequisites: Sprint 26 (Meeting Q&A MVP)

Objective

Enable workspace-scoped Q&A and annotation suggestions across multiple meetings.

Key Tasks

Task 1: Workspace-Scoped Semantic Search

Extend SegmentRepository with workspace-scoped search:

async def search_semantic_workspace(
    self,
    query_embedding: list[float],
    workspace_id: UUID,
    project_id: UUID | None = None,
    limit: int = 20,
) -> list[tuple[Segment, float]]:
    """Search segments across all meetings in workspace/project."""

Task 2: WorkspaceQA Graph

Create infrastructure/ai/graphs/workspace_qa.py:

Similar to MeetingQA but omits meeting_id filter
Groups results by meeting for citation display
Returns cross-meeting citations

Task 3: Annotation Suggester

Add annotation suggestion output to graph:

class SuggestedAnnotation:
    text: str
    annotation_type: AnnotationType
    segment_ids: list[int]
    confidence: float

Task 4: Conversation History

Implement thread persistence with checkpointer:

Store conversation turns in graph state
Support follow-up questions
Maintain context across requests

Task 5: Apply Annotation Flow

UI flow to apply suggested annotations:

Display suggested annotations in AskPanel
User clicks "Apply" on suggestion
Call existing AddAnnotation RPC
Update UI to show applied status

Acceptance Criteria

Cross-meeting queries return results from multiple meetings
Suggested annotations can be applied with one click
Conversation history persists across requests
Follow-up questions reference previous context
make quality passes

Files Created/Modified

Action	Path
Modified	`src/noteflow/infrastructure/persistence/repositories/segment_repo.py`
Created	`src/noteflow/infrastructure/ai/graphs/workspace_qa.py`
Modified	`src/noteflow/application/services/assistant/assistant_service.py`
Modified	`client/src/components/meeting/AskPanel.tsx`

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