{
  "$schema": "https://verifymcp.io/schemas/changelog.json",
  "server": "ketherworks-codeforces",
  "component": "codeforces-oj-mcp",
  "generated_at": "2026-09-20T20:22:22.400Z",
  "tracking_since": "2026-07-26",
  "counts": {
    "critical": 0,
    "security": 4,
    "functional": 0,
    "cosmetic": 0
  },
  "events": [
    {
      "id": "chg_019fdf8f-e9a4-7160-b10a-b0f065a38db9",
      "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": "500",
        "transport": "streamable-http"
      },
      "occurred_on": "2026-08-08",
      "occurred_at": "2026-08-08 04:09:38.415484+00",
      "observed_since": "2026-08-07",
      "source": "scan",
      "summary": "Transport (pass → fail)",
      "link": "https://verifymcp.io/servers/ketherworks-codeforces/codeforces-oj-mcp#chg-chg_019fdf8f-e9a4-7160-b10a-b0f065a38db9"
    },
    {
      "id": "chg_019fdf8f-e9a5-70a3-8c83-4560bf17a139",
      "kind": "check.unverifiable",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.building_history",
      "to_code": "stability.insufficient_history",
      "from_value": "0.40",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-08",
      "occurred_at": "2026-08-08 04:09:38.415484+00",
      "observed_since": "2026-08-07",
      "source": "scan",
      "summary": "Stability (0.40 → unverified)",
      "link": "https://verifymcp.io/servers/ketherworks-codeforces/codeforces-oj-mcp#chg-chg_019fdf8f-e9a5-70a3-8c83-4560bf17a139"
    },
    {
      "id": "chg_019fdf8f-e9a5-7672-b36e-bebce5680f4e",
      "kind": "check.unverifiable",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.none_no_destructive",
      "to_code": "auth.none_unlisted",
      "from_value": "partial",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-08",
      "occurred_at": "2026-08-08 04:09:38.415484+00",
      "observed_since": "2026-08-07",
      "source": "scan",
      "summary": "Authorization (partial → unverified)",
      "link": "https://verifymcp.io/servers/ketherworks-codeforces/codeforces-oj-mcp#chg-chg_019fdf8f-e9a5-7672-b36e-bebce5680f4e"
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    {
      "id": "chg_019fdf8f-e9a6-7a9f-a10f-6ef7017f687c",
      "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": "2026-08-08",
      "occurred_at": "2026-08-08 04:09:38.415484+00",
      "observed_since": "2026-08-07",
      "source": "scan",
      "summary": "Endpoint reachability (reachable → not serving MCP)",
      "link": "https://verifymcp.io/servers/ketherworks-codeforces/codeforces-oj-mcp#chg-chg_019fdf8f-e9a6-7a9f-a10f-6ef7017f687c"
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      "total": 18,
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      "attribution": null,
      "event_count": 1
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      "total": 0,
      "delta": null,
      "tracked": true,
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      "attribution": null,
      "event_count": 1
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    {
      "date": "2026-08-08",
      "total": 0,
      "delta": null,
      "tracked": true,
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      "attribution": null,
      "event_count": 7
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      "date": "2026-07-31",
      "total": 0,
      "delta": null,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
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    {
      "date": "2026-07-27",
      "total": 0,
      "delta": null,
      "tracked": true,
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      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
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    {
      "date": "2026-07-26",
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      "delta": null,
      "tracked": true,
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}