{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://wendkeep.dev/schema/host-coverage-v1.schema.json",
  "title": "WendKeep host coverage v1",
  "type": "object",
  "additionalProperties": false,
  "required": ["schema_version", "manifest_version", "host_id", "requested_host_id", "host_version", "version_supported", "observed_at", "degraded", "capabilities", "degradations", "tool_effects"],
  "properties": {
    "schema_version": { "const": 1 },
    "manifest_version": { "type": "string" },
    "host_id": { "type": "string", "pattern": "^[a-z][a-z0-9-]*$" },
    "requested_host_id": { "type": "string", "minLength": 1, "maxLength": 80 },
    "host_version": { "type": "string", "maxLength": 80 },
    "version_supported": { "type": "boolean" },
    "observed_at": { "type": "string", "format": "date-time" },
    "degraded": { "type": "boolean" },
    "capabilities": { "type": "array", "minItems": 17, "maxItems": 17, "items": { "$ref": "#/$defs/capability" } },
    "degradations": { "type": "array", "items": { "$ref": "#/$defs/degradation" } },
    "tool_effects": { "$ref": "#/$defs/toolEffects" }
  },
  "$defs": {
    "state": { "enum": ["native", "adapted", "polled", "manual", "unavailable"] },
    "capability": {
      "type": "object", "additionalProperties": false,
      "required": ["capability", "state", "authority"],
      "properties": {
        "capability": { "type": "string" },
        "state": { "$ref": "#/$defs/state" },
        "authority": { "enum": ["verified", "reported", "unavailable"] }
      }
    },
    "degradation": {
      "type": "object", "additionalProperties": false,
      "required": ["capability", "state", "code", "blocking"],
      "properties": {
        "capability": { "type": "string" },
        "state": { "$ref": "#/$defs/state" },
        "code": { "type": "string", "pattern": "^HOST_[A-Z0-9_]+$" },
        "blocking": { "type": "boolean" }
      }
    },
    "toolEffects": {
      "type": "object", "additionalProperties": false,
      "required": ["manifest_valid", "catalog_version", "read", "write", "destructive", "unknown"],
      "properties": {
        "manifest_valid": { "type": "boolean" },
        "catalog_version": { "type": "string" },
        "read": { "type": "boolean" },
        "write": { "type": "boolean" },
        "destructive": { "type": "boolean" },
        "unknown": { "const": "fail-closed" }
      }
    }
  }
}