{
  "$schema": "https://verifymcp.io/schemas/changelog.json",
  "server": "fans-ugc-studio",
  "component": "studio",
  "generated_at": "2026-10-23T23:26:09.127Z",
  "tracking_since": "2026-10-08",
  "counts": {
    "critical": 1,
    "security": 5,
    "functional": 0,
    "cosmetic": 0
  },
  "events": [
    {
      "id": "chg_01a1397e-086f-760e-84bf-8753066731fc",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "ugcfans_get_account",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "ugcfans_get_account"
      },
      "occurred_on": "2026-10-14",
      "occurred_at": "2026-10-14 08:18:43.247643+00",
      "observed_since": "2026-10-13",
      "source": "scan",
      "summary": "Tool “ugcfans_get_account” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/fans-ugc-studio/studio#chg-chg_01a1397e-086f-760e-84bf-8753066731fc"
    },
    {
      "id": "chg_01a1397e-0872-7202-bec4-4c6b9061c244",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "ugcfans_search_templates",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "ugcfans_search_templates"
      },
      "occurred_on": "2026-10-14",
      "occurred_at": "2026-10-14 08:18:43.247643+00",
      "observed_since": "2026-10-13",
      "source": "scan",
      "summary": "Tool “ugcfans_search_templates” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/fans-ugc-studio/studio#chg-chg_01a1397e-0872-7202-bec4-4c6b9061c244"
    },
    {
      "id": "chg_01a1397e-0877-75c0-832e-e9532ad000ba",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "ugcfans_share_file",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "ugcfans_share_file"
      },
      "occurred_on": "2026-10-14",
      "occurred_at": "2026-10-14 08:18:43.247643+00",
      "observed_since": "2026-10-13",
      "source": "scan",
      "summary": "Tool “ugcfans_share_file” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/fans-ugc-studio/studio#chg-chg_01a1397e-0877-75c0-832e-e9532ad000ba"
    },
    {
      "id": "chg_01a1397e-0878-7195-86c8-011af9f46036",
      "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": "2026-10-14",
      "occurred_at": "2026-10-14 08:18:43.247643+00",
      "observed_since": "2026-10-13",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/fans-ugc-studio/studio#chg-chg_01a1397e-0878-7195-86c8-011af9f46036"
    },
    {
      "id": "chg_01a13454-7669-755d-9375-d2ae6a827e08",
      "kind": "check.reverified",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.none_destructive_unverified",
      "to_code": "auth.none_destructive",
      "from_value": "unverified",
      "to_value": "fail",
      "materiality": "critical",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "tool": "ugcfans_cancel_job"
      },
      "occurred_on": "2026-10-13",
      "occurred_at": "2026-10-13 08:15:12.965565+00",
      "observed_since": "2026-10-12",
      "source": "scan",
      "summary": "Authorization (unverified → fail)",
      "link": "https://verifymcp.io/servers/fans-ugc-studio/studio#chg-chg_01a13454-7669-755d-9375-d2ae6a827e08"
    },
    {
      "id": "chg_01a12e30-4ba0-74ea-b62e-ab2ce5416456",
      "kind": "check.unverifiable",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.none_destructive",
      "to_code": "auth.none_destructive_unverified",
      "from_value": "fail",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "tool": "ugcfans_cancel_job"
      },
      "occurred_on": "2026-10-12",
      "occurred_at": "2026-10-12 03:37:58.948199+00",
      "observed_since": "2026-10-10",
      "source": "scan",
      "summary": "Authorization (fail → unverified)",
      "link": "https://verifymcp.io/servers/fans-ugc-studio/studio#chg-chg_01a12e30-4ba0-74ea-b62e-ab2ce5416456"
    }
  ],
  "days": [
    {
      "date": "2026-10-22",
      "total": 74,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 43,
        "to": 47,
        "delta": 4,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 13,
          "to_days": 14
        },
        "partial": false,
        "compared_to": "2026-10-21",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-10-20",
      "total": 73,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 37,
        "to": 40,
        "delta": 3,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 11,
          "to_days": 12
        },
        "partial": false,
        "compared_to": "2026-10-19",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-10-18",
      "total": 72,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 30,
        "to": 33,
        "delta": 3,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 9,
          "to_days": 10
        },
        "partial": false,
        "compared_to": "2026-10-17",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-10-16",
      "total": 71,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 23,
        "to": 27,
        "delta": 4,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 7,
          "to_days": 8
        },
        "partial": false,
        "compared_to": "2026-10-15",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-10-15",
      "total": 70,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 5
    },
    {
      "date": "2026-10-14",
      "total": 70,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 4
    },
    {
      "date": "2026-10-13",
      "total": 70,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-10-12",
      "total": 70,
      "delta": 1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    }
  ]
}