feat: initial Sol virtual librarian implementation

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Matrix bot with E2EE (matrix-sdk 0.9) that passively archives all
messages to OpenSearch and responds to queries via Mistral AI with
function calling tools.

Core systems:
- Archive: bulk OpenSearch indexer with batch/flush, edit/redaction
  handling, embedding pipeline passthrough
- Brain: rule-based engagement evaluator (mentions, DMs, name
  invocations), LLM-powered spontaneous engagement, per-room
  conversation context windows, response delay simulation
- Tools: search_archive, get_room_context, list_rooms, get_room_members
  registered as Mistral function calling tools with iterative tool loop
- Personality: templated system prompt with Sol's librarian persona

47 unit tests covering config, evaluator, conversation windowing,
personality templates, schema serialization, and search query building.

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Sienna Meridian Satterwhite

2026-03-20 21:40:13 +00:00

commit 4dc20bee23

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