{
  "collection_name": "nexa_knowledge_visual",
  "vector_config": {
    "size": 768,
    "distance": "Cosine"
  },
  "payload_schema": {
    "source":      "keyword",
    "source_type": "keyword",
    "modality":    "keyword",
    "mime_type":   "keyword",
    "media_uri":   "keyword",
    "context":     "keyword",
    "tags":        "keyword",
    "graph_iri":   "keyword",
    "content_hash":"keyword",
    "created_at":  "datetime"
  },
  "_notes": {
    "status": "PLACEHOLDER — not deployed in Phase 3.1. Created in Phase 3.2.",
    "vector_size_rationale": "768 = jina-clip-v2 joint text/image space. The same model embeds both text queries and images, so semantic queries against this collection are simple kNN.",
    "served_by": "Will be served by `infinity` (https://github.com/michaelfeil/infinity) — drop-in replacement for TEI that supports CLIP-family models with the same OpenAI-compatible API.",
    "modality_field": "'image' for indexed images, 'text' if a text query has been embedded into the visual space for retrieval (rare — usually we embed the text query at search time and don't store it).",
    "media_uri_field": "Required for image rows. Examples: 'memos://memos/123/attachment/4', 'nextcloud://files/photos/whiteboard-2025-09.jpg', 'obsidian://attachments/diagram.png'."
  }
}