Module session_indexing 

Session transcript indexing with dual-limiter chunking

Implements conversation indexing with:

• Dual-limiter chunking (messages + characters)
• Overlap preservation for context continuity
• Delta updates for incremental indexing
• TranscriptChunk memory type with 7-day default TTL

Based on Fix 6 from the design plan:

Dual-limiter chunking algorithm with max_messages AND max_chars

Structs

ChunkingConfig

Configuration for conversation chunking

ConversationChunk

A chunk of conversation messages

Message

A message in a conversation

Session

Session information

Functions

chunk_conversation

Chunk a conversation using the dual-limiter algorithm.

delete_session

Delete a session and all its chunks

get_session

Get a session by ID

index_conversation

Index a full conversation into memory chunks.

index_conversation_delta

Index new messages incrementally (delta update).

list_sessions

List all sessions with optional workspace filter