{
  "$schema": "https://verifymcp.io/schemas/changelog.json",
  "server": "kr-xdata-xdata-mcp",
  "component": "api",
  "generated_at": "2026-09-27T20:22:49.605Z",
  "tracking_since": "2026-09-22",
  "counts": {
    "critical": 0,
    "security": 14,
    "functional": 0,
    "cosmetic": 0
  },
  "events": [
    {
      "id": "chg_01a0e25d-f095-78da-8ba0-0793d6690a9a",
      "kind": "server.instructions_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "instructions",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-09-27",
      "occurred_at": "2026-09-27 10:16:41.751071+00",
      "observed_since": "2026-09-26",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/kr-xdata-xdata-mcp/api#chg-chg_01a0e25d-f095-78da-8ba0-0793d6690a9a"
    },
    {
      "id": "chg_01a0d2ec-882b-7b3b-9f05-68c6e5427e04",
      "kind": "check.verdict",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.building_history",
      "to_code": "stability.churn",
      "from_value": "0.03",
      "to_value": "fail",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "days": "2",
        "added": "0",
        "breaks": "0",
        "removed": "1",
        "auth_transport": "0"
      },
      "occurred_on": "2026-09-24",
      "occurred_at": "2026-09-24 10:18:30.060969+00",
      "observed_since": "2026-09-23",
      "source": "scan",
      "summary": "Stability (0.03 → fail)",
      "link": "https://verifymcp.io/servers/kr-xdata-xdata-mcp/api#chg-chg_01a0d2ec-882b-7b3b-9f05-68c6e5427e04"
    },
    {
      "id": "chg_01a0d2ec-883b-719a-90e9-675954a0988f",
      "kind": "tool.destructive_set",
      "family": "",
      "subject_kind": "tool",
      "subject": "hometax__certificate__download",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": "false",
      "to_value": "true",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "to": "true",
        "from": "false",
        "tool": "hometax__certificate__download"
      },
      "occurred_on": "2026-09-24",
      "occurred_at": "2026-09-24 10:18:30.060969+00",
      "observed_since": "2026-09-23",
      "source": "scan",
      "summary": "Tool “hometax__certificate__download” is now declared destructive",
      "link": "https://verifymcp.io/servers/kr-xdata-xdata-mcp/api#chg-chg_01a0d2ec-883b-719a-90e9-675954a0988f"
    },
    {
      "id": "chg_01a0d2ec-883f-7e25-bdbe-9584bda38dcb",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "opendata__env__waste_sanction",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "opendata__env__waste_sanction"
      },
      "occurred_on": "2026-09-24",
      "occurred_at": "2026-09-24 10:18:30.060969+00",
      "observed_since": "2026-09-23",
      "source": "scan",
      "summary": "Tool “opendata__env__waste_sanction” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/kr-xdata-xdata-mcp/api#chg-chg_01a0d2ec-883f-7e25-bdbe-9584bda38dcb"
    },
    {
      "id": "chg_01a0d2ec-8842-72ef-aeb8-bbf717ac8fe6",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "opendata__g2b__sanction",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "opendata__g2b__sanction"
      },
      "occurred_on": "2026-09-24",
      "occurred_at": "2026-09-24 10:18:30.060969+00",
      "observed_since": "2026-09-23",
      "source": "scan",
      "summary": "Tool “opendata__g2b__sanction” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/kr-xdata-xdata-mcp/api#chg-chg_01a0d2ec-8842-72ef-aeb8-bbf717ac8fe6"
    },
    {
      "id": "chg_01a0d2ec-8843-735a-b66f-3ee2a2bb1520",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "opendata__kiscon__sanction",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "opendata__kiscon__sanction"
      },
      "occurred_on": "2026-09-24",
      "occurred_at": "2026-09-24 10:18:30.060969+00",
      "observed_since": "2026-09-23",
      "source": "scan",
      "summary": "Tool “opendata__kiscon__sanction” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/kr-xdata-xdata-mcp/api#chg-chg_01a0d2ec-8843-735a-b66f-3ee2a2bb1520"
    },
    {
      "id": "chg_01a0d2ec-8845-7586-b79a-08da33054ae9",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "opendata__nts__status",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "opendata__nts__status"
      },
      "occurred_on": "2026-09-24",
      "occurred_at": "2026-09-24 10:18:30.060969+00",
      "observed_since": "2026-09-23",
      "source": "scan",
      "summary": "Tool “opendata__nts__status” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/kr-xdata-xdata-mcp/api#chg-chg_01a0d2ec-8845-7586-b79a-08da33054ae9"
    },
    {
      "id": "chg_01a0d2ec-884c-746a-aaa8-2001a1c892e2",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "opendata__nts__validate",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "opendata__nts__validate"
      },
      "occurred_on": "2026-09-24",
      "occurred_at": "2026-09-24 10:18:30.060969+00",
      "observed_since": "2026-09-23",
      "source": "scan",
      "summary": "Tool “opendata__nts__validate” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/kr-xdata-xdata-mcp/api#chg-chg_01a0d2ec-884c-746a-aaa8-2001a1c892e2"
    },
    {
      "id": "chg_01a0d2ec-884d-78d3-bb4d-a62e8eb33373",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "payroll_pack__employment_insurance_summary_v1__generate",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "payroll_pack__employment_insurance_summary_v1__generate"
      },
      "occurred_on": "2026-09-24",
      "occurred_at": "2026-09-24 10:18:30.060969+00",
      "observed_since": "2026-09-23",
      "source": "scan",
      "summary": "Tool “payroll_pack__employment_insurance_summary_v1__generate” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/kr-xdata-xdata-mcp/api#chg-chg_01a0d2ec-884d-78d3-bb4d-a62e8eb33373"
    },
    {
      "id": "chg_01a0d2ec-8850-71f8-90db-5332a4d33532",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "payroll_pack__insurance_deduction_material_v1__generate",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "payroll_pack__insurance_deduction_material_v1__generate"
      },
      "occurred_on": "2026-09-24",
      "occurred_at": "2026-09-24 10:18:30.060969+00",
      "observed_since": "2026-09-23",
      "source": "scan",
      "summary": "Tool “payroll_pack__insurance_deduction_material_v1__generate” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/kr-xdata-xdata-mcp/api#chg-chg_01a0d2ec-8850-71f8-90db-5332a4d33532"
    },
    {
      "id": "chg_01a0d2ec-8851-75e5-89f8-7bc7ea593acc",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "payroll_pack__premium_summary_v1__generate",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "payroll_pack__premium_summary_v1__generate"
      },
      "occurred_on": "2026-09-24",
      "occurred_at": "2026-09-24 10:18:30.060969+00",
      "observed_since": "2026-09-23",
      "source": "scan",
      "summary": "Tool “payroll_pack__premium_summary_v1__generate” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/kr-xdata-xdata-mcp/api#chg-chg_01a0d2ec-8851-75e5-89f8-7bc7ea593acc"
    },
    {
      "id": "chg_01a0d2ec-8854-7670-9341-770663ad2084",
      "kind": "tool.removed",
      "family": "",
      "subject_kind": "tool",
      "subject": "payroll_pack__smoke__generate",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "tool": "payroll_pack__smoke__generate"
      },
      "occurred_on": "2026-09-24",
      "occurred_at": "2026-09-24 10:18:30.060969+00",
      "observed_since": "2026-09-23",
      "source": "scan",
      "summary": "Tool “payroll_pack__smoke__generate” was removed",
      "link": "https://verifymcp.io/servers/kr-xdata-xdata-mcp/api#chg-chg_01a0d2ec-8854-7670-9341-770663ad2084"
    },
    {
      "id": "chg_01a0d2ec-8854-7e80-847b-b84088f835b1",
      "kind": "server.instructions_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "instructions",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-09-24",
      "occurred_at": "2026-09-24 10:18:30.060969+00",
      "observed_since": "2026-09-23",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/kr-xdata-xdata-mcp/api#chg-chg_01a0d2ec-8854-7e80-847b-b84088f835b1"
    },
    {
      "id": "chg_01a0d2ec-885a-7d0d-87aa-bace64219b0d",
      "kind": "server.breaking_without_version_bump",
      "family": "",
      "subject_kind": "server",
      "subject": "1.0.0",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": "1.0.0",
      "to_value": "1.0.0",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "removed": "1",
        "version": "1.0.0",
        "breaking": "0"
      },
      "occurred_on": "2026-09-24",
      "occurred_at": "2026-09-24 10:18:30.060969+00",
      "observed_since": "2026-09-23",
      "source": "scan",
      "summary": "A breaking change shipped without a version bump (still 1.0.0)",
      "link": "https://verifymcp.io/servers/kr-xdata-xdata-mcp/api#chg-chg_01a0d2ec-885a-7d0d-87aa-bace64219b0d"
    }
  ],
  "days": [
    {
      "date": "2026-09-27",
      "total": 73,
      "delta": 1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 9
    },
    {
      "date": "2026-09-26",
      "total": 72,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 6
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    {
      "date": "2026-09-25",
      "total": 72,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-09-24",
      "total": 72,
      "delta": 1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 14
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    {
      "date": "2026-09-23",
      "total": 71,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-09-22",
      "total": 71,
      "delta": null,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 0
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}