{
  "$schema": "https://verifymcp.io/schemas/changelog.json",
  "server": "beepboop2025-undertow",
  "component": "undertow-mcp",
  "generated_at": "2026-09-21T02:22:54.141Z",
  "tracking_since": "2026-07-28",
  "counts": {
    "critical": 0,
    "security": 21,
    "functional": 0,
    "cosmetic": 0
  },
  "events": [
    {
      "id": "chg_01a0848b-313e-7cf4-bd97-03af829a6363",
      "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": "2026-09-09",
      "occurred_at": "2026-09-09 05:01:49.610413+00",
      "observed_since": "2026-09-08",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a0848b-313e-7cf4-bd97-03af829a6363"
    },
    {
      "id": "chg_01a06ad3-5a8c-7e00-8620-7e145ef073e3",
      "kind": "check.reverified",
      "family": "tool-safety-manipulation",
      "subject_kind": "check",
      "subject": "tool-safety-manipulation",
      "subject_child": "",
      "from_code": "toolsafety.manipulation_unjudged",
      "to_code": "toolsafety.manipulation_clean",
      "from_value": "unverified",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {
        "units": "11",
        "judged": "11"
      },
      "occurred_on": "2026-09-04",
      "occurred_at": "2026-09-04 05:10:31.211035+00",
      "observed_since": "2026-09-03",
      "source": "scan",
      "summary": "Judged manipulation (unverified → pass)",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a06ad3-5a8c-7e00-8620-7e145ef073e3"
    },
    {
      "id": "chg_01a065ac-d233-7275-aaf8-d3d3dd09796c",
      "kind": "check.unverifiable",
      "family": "tool-safety-manipulation",
      "subject_kind": "check",
      "subject": "tool-safety-manipulation",
      "subject_child": "",
      "from_code": "toolsafety.manipulation_clean",
      "to_code": "toolsafety.manipulation_unjudged",
      "from_value": "pass",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "units": "11",
        "judged": "9",
        "reason": "partially_judged"
      },
      "occurred_on": "2026-09-03",
      "occurred_at": "2026-09-03 05:10:19.823799+00",
      "observed_since": "2026-09-02",
      "source": "scan",
      "summary": "Judged manipulation (pass → unverified)",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a065ac-d233-7275-aaf8-d3d3dd09796c"
    },
    {
      "id": "chg_01a065ac-d235-72d6-947a-20c225427765",
      "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": "2026-09-03",
      "occurred_at": "2026-09-03 05:10:19.823799+00",
      "observed_since": "2026-09-02",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a065ac-d235-72d6-947a-20c225427765"
    },
    {
      "id": "chg_01a04bed-69f5-760d-bab5-254ff34d9f5f",
      "kind": "check.verdict",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.building_history",
      "to_code": "stability.stable",
      "from_value": "0.97",
      "to_value": "pass",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-29",
      "occurred_at": "2026-08-29 05:10:45.390962+00",
      "observed_since": "2026-08-28",
      "source": "scan",
      "summary": "Stability (0.97 → pass)",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a04bed-69f5-760d-bab5-254ff34d9f5f"
    },
    {
      "id": "chg_01a041a0-9b34-7779-a075-54629299a50e",
      "kind": "check.verdict",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.building_history",
      "to_code": "stability.stable",
      "from_value": "0.97",
      "to_value": "pass",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-27",
      "occurred_at": "2026-08-27 05:10:39.623629+00",
      "observed_since": "2026-08-26",
      "source": "scan",
      "summary": "Stability (0.97 → pass)",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a041a0-9b34-7779-a075-54629299a50e"
    },
    {
      "id": "chg_01a02d07-00ec-7dec-af63-dcba132e92f2",
      "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": "2026-08-23",
      "occurred_at": "2026-08-23 05:10:28.755943+00",
      "observed_since": "2026-08-22",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a02d07-00ec-7dec-af63-dcba132e92f2"
    },
    {
      "id": "chg_01a007a7-76d3-7651-8162-55bc5db08e83",
      "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": "2026-08-15",
      "occurred_at": "2026-08-15 23:00:10.541865+00",
      "observed_since": "2026-08-15",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a007a7-76d3-7651-8162-55bc5db08e83"
    },
    {
      "id": "chg_019fd051-ca91-7861-93b0-90fa53cdb4f2",
      "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": "2026-08-05",
      "occurred_at": "2026-08-05 05:07:28.987294+00",
      "observed_since": "2026-08-04",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fd051-ca91-7861-93b0-90fa53cdb4f2"
    },
    {
      "id": "chg_019fcb29-774c-770c-a8f8-caaf15bfa3c9",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "unwind_watch",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "unwind_watch"
      },
      "occurred_on": "2026-08-04",
      "occurred_at": "2026-08-04 05:05:20.190564+00",
      "observed_since": "2026-08-03",
      "source": "scan",
      "summary": "Tool “unwind_watch” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fcb29-774c-770c-a8f8-caaf15bfa3c9"
    },
    {
      "id": "chg_019fc606-d806-764e-b831-54f502f5cb1f",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "depth_episodes",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "depth_episodes"
      },
      "occurred_on": "2026-08-03",
      "occurred_at": "2026-08-03 05:09:25.054728+00",
      "observed_since": "2026-08-02",
      "source": "scan",
      "summary": "Tool “depth_episodes” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fc606-d806-764e-b831-54f502f5cb1f"
    },
    {
      "id": "chg_019fc606-d806-7af3-9535-7cd174f7acf8",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "liquidity_tiers",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "liquidity_tiers"
      },
      "occurred_on": "2026-08-03",
      "occurred_at": "2026-08-03 05:09:25.054728+00",
      "observed_since": "2026-08-02",
      "source": "scan",
      "summary": "Tool “liquidity_tiers” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fc606-d806-7af3-9535-7cd174f7acf8"
    },
    {
      "id": "chg_019fc606-d808-7270-90b0-66e3cc4767f4",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "unwind_watch",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "unwind_watch"
      },
      "occurred_on": "2026-08-03",
      "occurred_at": "2026-08-03 05:09:25.054728+00",
      "observed_since": "2026-08-02",
      "source": "scan",
      "summary": "Tool “unwind_watch” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fc606-d808-7270-90b0-66e3cc4767f4"
    },
    {
      "id": "chg_019fc606-d809-73d8-8044-fa47d60541e1",
      "kind": "tool.description_changed",
      "family": "",
      "subject_kind": "tool",
      "subject": "venue_concentration",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "tool": "venue_concentration"
      },
      "occurred_on": "2026-08-03",
      "occurred_at": "2026-08-03 05:09:25.054728+00",
      "observed_since": "2026-08-02",
      "source": "scan",
      "summary": "Tool “venue_concentration” rewrote its description, which is the text the model reads",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fc606-d809-73d8-8044-fa47d60541e1"
    },
    {
      "id": "chg_019fc606-d809-7d1f-b9b8-e333fa2798be",
      "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": "2026-08-03",
      "occurred_at": "2026-08-03 05:09:25.054728+00",
      "observed_since": "2026-08-02",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fc606-d809-7d1f-b9b8-e333fa2798be"
    },
    {
      "id": "chg_019fb23b-3200-797a-bbca-d57dcd676a83",
      "kind": "check.verdict",
      "family": "transport",
      "subject_kind": "check",
      "subject": "transport",
      "subject_child": "",
      "from_code": "transport.http_error",
      "to_code": "transport.verified",
      "from_value": "fail",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {
        "transport": "streamable-http"
      },
      "occurred_on": "2026-07-30",
      "occurred_at": "2026-07-30 08:54:11.700353+00",
      "observed_since": "2026-07-29",
      "source": "scan",
      "summary": "Transport (fail → pass)",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fb23b-3200-797a-bbca-d57dcd676a83"
    },
    {
      "id": "chg_019fb23b-3201-706f-b727-693d26316b57",
      "kind": "check.reason",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.none_unlisted",
      "to_code": "auth.none_undeclared",
      "from_value": "unverified",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "auth": "none",
        "undeclared_tools": "7"
      },
      "occurred_on": "2026-07-30",
      "occurred_at": "2026-07-30 08:54:11.700353+00",
      "observed_since": "2026-07-29",
      "source": "scan",
      "summary": "Authorization (Authorisation not fully verified: no authorisation is required to call this server, and 7 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.)",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fb23b-3201-706f-b727-693d26316b57"
    },
    {
      "id": "chg_019fb23b-3204-7619-b414-1b3778aaa714",
      "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": "2026-07-30",
      "occurred_at": "2026-07-30 08:54:11.700353+00",
      "observed_since": "2026-07-28",
      "source": "scan",
      "summary": "The server rewrote its instructions, which are the text every model session reads",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fb23b-3204-7619-b414-1b3778aaa714"
    },
    {
      "id": "chg_019fae14-ce0b-7e3f-b243-dd088d2cf4b8",
      "kind": "check.verdict",
      "family": "transport",
      "subject_kind": "check",
      "subject": "transport",
      "subject_child": "",
      "from_code": "transport.verified",
      "to_code": "transport.http_error",
      "from_value": "pass",
      "to_value": "fail",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "status": "404",
        "transport": "streamable-http"
      },
      "occurred_on": "2026-07-29",
      "occurred_at": "2026-07-29 13:33:46.875277+00",
      "observed_since": "2026-07-28",
      "source": "scan",
      "summary": "Transport (pass → fail)",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fae14-ce0b-7e3f-b243-dd088d2cf4b8"
    },
    {
      "id": "chg_019fae14-ce0c-7461-b2b8-25df59c67593",
      "kind": "check.reason",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.none_undeclared",
      "to_code": "auth.none_unlisted",
      "from_value": "unverified",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-07-29",
      "occurred_at": "2026-07-29 13:33:46.875277+00",
      "observed_since": "2026-07-28",
      "source": "scan",
      "summary": "Authorization (Authorisation not fully verified: no authorisation is required to connect, but we couldn't read the tool list to see what that exposes.)",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fae14-ce0c-7461-b2b8-25df59c67593"
    },
    {
      "id": "chg_019fae14-ce0d-7ae6-84c9-9132a443ce08",
      "kind": "capture.status_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "capture",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": "verified",
      "to_value": "not_mcp",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "to": "not_mcp",
        "from": "verified"
      },
      "occurred_on": "2026-07-29",
      "occurred_at": "2026-07-29 13:33:46.875277+00",
      "observed_since": "2026-07-28",
      "source": "scan",
      "summary": "Endpoint reachability (reachable → not serving MCP)",
      "link": "https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fae14-ce0d-7ae6-84c9-9132a443ce08"
    }
  ],
  "days": [
    {
      "date": "2026-09-09",
      "total": 81,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 4
    },
    {
      "date": "2026-09-04",
      "total": 81,
      "delta": 7,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 2
    },
    {
      "date": "2026-09-03",
      "total": 74,
      "delta": -9,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 6
    },
    {
      "date": "2026-08-29",
      "total": 83,
      "delta": 1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-08-28",
      "total": 82,
      "delta": -1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-08-27",
      "total": 83,
      "delta": 1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-08-26",
      "total": 82,
      "delta": 1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-08-24",
      "total": 81,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 87,
        "to": 90,
        "delta": 3,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 26,
          "to_days": 27
        },
        "partial": false,
        "compared_to": "2026-08-23",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    }
  ]
}