{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "gno://schemas/memory-recall@1.0",
  "title": "GNO Memory Recall Result",
  "description": "Shared result of `recall` on every surface (CLI --json, MCP gno_recall, REST POST /api/memory/recall, SDK client.recall()). Derived from RecallResult in src/core/memory.ts. Every returned fact carries a gno:// cite and its egress lineage; the receipt is content-free and bound to caller + session.",
  "type": "object",
  "additionalProperties": false,
  "required": ["facts", "receipt", "budget", "retrieval"],
  "properties": {
    "facts": {
      "type": "array",
      "items": { "$ref": "#/$defs/recalledFact" }
    },
    "receipt": { "$ref": "#/$defs/receipt" },
    "budget": {
      "type": "object",
      "additionalProperties": false,
      "required": ["maxFacts", "maxTokens", "usedTokens", "omitted"],
      "properties": {
        "maxFacts": { "type": "integer", "minimum": 1 },
        "maxTokens": { "type": "integer", "minimum": 1 },
        "usedTokens": { "type": "integer", "minimum": 0 },
        "omitted": { "type": "integer", "minimum": 0 }
      }
    },
    "retrieval": {
      "type": "object",
      "additionalProperties": false,
      "required": ["mode"],
      "properties": {
        "mode": { "enum": ["hybrid", "lexical"] },
        "semanticUnavailable": { "type": "string" }
      }
    },
    "egressLineage": {
      "$ref": "#/$defs/egressLineage",
      "description": "Strictest source policy across every returned fact; absent when no fact was returned."
    },
    "hint": {
      "type": "string",
      "description": "Self-teaching line naming `gno remember`; present only when no fact was returned."
    }
  },
  "$defs": {
    "uri": {
      "type": "string",
      "pattern": "^gno://[^/]+/.+"
    },
    "sha256": {
      "type": "string",
      "pattern": "^[a-f0-9]{64}$"
    },
    "recalledFact": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "uri",
        "docid",
        "recordId",
        "text",
        "scopes",
        "caller",
        "session",
        "createdAt",
        "contentHash",
        "supersedes",
        "score",
        "spanHash",
        "egressLineage"
      ],
      "properties": {
        "uri": { "$ref": "#/$defs/uri" },
        "docid": { "type": "string", "minLength": 1 },
        "recordId": { "type": "string", "pattern": "^mem-" },
        "text": { "type": "string", "minLength": 1 },
        "scopes": {
          "type": "array",
          "minItems": 1,
          "maxItems": 8,
          "items": { "type": "string", "minLength": 1, "maxLength": 64 }
        },
        "caller": { "type": "string", "minLength": 1 },
        "session": { "type": "string", "minLength": 1 },
        "createdAt": { "type": "string", "format": "date-time" },
        "contentHash": { "$ref": "#/$defs/sha256" },
        "source": {
          "type": "string",
          "minLength": 1,
          "description": "Free-text evidence recorded with the fact, when one was given."
        },
        "supersedes": {
          "type": "array",
          "items": { "$ref": "#/$defs/uri" }
        },
        "score": { "type": "number", "minimum": 0 },
        "spanHash": {
          "$ref": "#/$defs/sha256",
          "description": "Hash of the returned span; replaying it to remember with this receipt is fenced."
        },
        "egressLineage": { "$ref": "#/$defs/egressLineage" }
      }
    },
    "receipt": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "caller",
        "session",
        "issuedAt",
        "memoryIds",
        "spanHashes",
        "digest"
      ],
      "properties": {
        "caller": { "type": "string", "minLength": 1 },
        "session": { "type": "string", "minLength": 1 },
        "issuedAt": { "type": "string", "format": "date-time" },
        "memoryIds": {
          "type": "array",
          "items": { "type": "string", "minLength": 1 }
        },
        "spanHashes": {
          "type": "array",
          "items": { "$ref": "#/$defs/sha256" }
        },
        "digest": { "$ref": "#/$defs/sha256" }
      }
    },
    "egressLineage": {
      "type": "object",
      "additionalProperties": false,
      "required": ["effectivePolicy", "digest", "sources"],
      "properties": {
        "effectivePolicy": { "enum": ["local_only", "lan", "remote"] },
        "digest": { "$ref": "#/$defs/sha256" },
        "sources": {
          "type": "array",
          "minItems": 1,
          "maxItems": 128,
          "items": {
            "type": "object",
            "additionalProperties": false,
            "required": ["collection", "policy", "source"],
            "properties": {
              "collection": {
                "type": "string",
                "pattern": "^[a-z0-9][a-z0-9_-]{0,63}$"
              },
              "policy": { "enum": ["local_only", "lan", "remote"] },
              "source": {
                "enum": ["explicit", "config_default", "legacy_default"]
              }
            }
          }
        }
      }
    }
  }
}