{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://faf.one/schemas/one.faf-context.schema.json",
  "title": "one.faf/context",
  "description": "FAF's namespaced extension key. one.faf is reverse-DNS for faf.one, so the key dereferences to https://faf.one/context. It carries the FAF receipt — a thin, falsifiable pointer at a .faf artifact — wherever a host format offers a namespaced slot: an AI Catalog entry, an MCP server card _meta, or any equivalent extension surface. The payload never duplicates the artifact; the .faf stays the single source of truth. Forward-compatible: unknown keys are permitted.",
  "type": "object",
  "additionalProperties": true,
  "properties": {
    "faf": {
      "type": "string",
      "format": "uri",
      "description": "URL of the .faf artifact this receipt points at.",
      "examples": ["https://context.faf.one/.well-known/project.faf"]
    },
    "mediaType": {
      "type": "string",
      "description": "IANA media type of the artifact.",
      "examples": ["application/vnd.faf+yaml"]
    },
    "iana": {
      "type": "string",
      "description": "IANA registration status of the media type: the literal \"registered\" or the registry URL.",
      "examples": [
        "registered",
        "https://www.iana.org/assignments/media-types/application/vnd.faf+yaml"
      ]
    },
    "deterministic": {
      "type": "boolean",
      "description": "True when the payload and the artifact's score are mechanically derived — same input, same output."
    },
    "scoreEndpoint": {
      "type": "string",
      "format": "uri",
      "description": "Where the artifact's score can be reproduced."
    },
    "generated": {
      "type": "string",
      "format": "date-time",
      "description": "When the receipt payload was first generated."
    },
    "generated_at": {
      "type": "string",
      "format": "date-time",
      "description": "When the receipt payload was last regenerated."
    }
  }
}