{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "mindnet_chunk",
  "type": "object",
  "description": "Chunk-Payload (Qdrant). Kompatibel mit Alt-Feldern und neuen Feldern für Export/Roundtrip.",
  "required": ["id", "note_id", "chunk_index", "path"],
  "properties": {
    "id":           { "type": "string" },
    "scope":        { "type": "string", "enum": ["chunk"] },
    "note_id":      { "type": "string" },
    "note_title":   { "type": "string" },
    "note_type":    { "type": "string" },
    "note_status":  { "type": "string" },
    "type":         { "type": "string", "description": "Legacy: früherer Chunk-Typ; kann dem Note-Typ entsprechen" },
    "area":         { "type": "string" },
    "project":      { "type": "string" },
    "tags":         { "type": "array", "items": { "type": "string" } },

    "note_path":    { "type": "string" },
    "path":         { "type": "string" },

    "chunk_index":  { "type": "integer" },
    "section_title":{ "type": ["string","null"] },
    "section_path": { "type": ["string","null"] },

    "char_start":   { "type": ["integer","null"] },
    "char_end":     { "type": ["integer","null"] },
    "char_len":     { "type": "integer" },

    "token_count":  { "type": "integer", "description": "Legacy: frühere Token-Zahl" },
    "token_est":    { "type": "integer", "description": "Neue grobe Token-Schätzung (≈ len(text)/4)" },

    "neighbors": {
      "type": "object",
      "properties": {
        "prev": { "type": ["string","null"] },
        "next": { "type": ["string","null"] }
      },
      "additionalProperties": false
    },

    "text":         { "type": "string" },
    "text_sha256":  { "type": "string", "pattern": "^sha256:[0-9a-fA-F]{64}$" },
    "lang":         { "type": "string" },

    "wikilinks":    { "type": "array", "items": { "type": "string" } },
    "external_links": {
      "type": "array",
      "items": {
        "anyOf": [
          { "type": "string" },
          {
            "type": "object",
            "properties": {
              "href":  { "type": "string" },
              "label": { "type": ["string","null"] }
            },
            "required": ["href"],
            "additionalProperties": false
          }
        ]
      }
    },
    "references": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "target_id": { "type": "string" },
          "kind":      { "type": "string" }
        },
        "required": ["target_id","kind"],
        "additionalProperties": true
      }
    },

    "embed_model":   { "type": "string" },
    "embed_dim":     { "type": "integer" },
    "embed_version": { "type": "integer" },

    "created_at":   { "type": "string" }
  },

  "allOf": [
    { "anyOf": [ { "required": ["token_count"] }, { "required": ["token_est"] } ] },
    { "anyOf": [ { "required": ["type"] }, { "required": ["note_type"] } ] }
  ],

  "additionalProperties": true
}