{
  "slug": "github-mcp-server-adds-gated-find-duplicate-tool-5b6800a565b5",
  "title": "github-mcp-server adds gated find_duplicate tool",
  "tools": [
    "github-mcp-server"
  ],
  "tags": [
    "agent"
  ],
  "introduced_at": "2026-08-10T13:10:20.000Z",
  "announced_at": "2026-08-10T13:10:20.000Z",
  "effective_at": null,
  "date_basis": "source-publication",
  "status": "unknown",
  "how": {
    "incantation": "When reviewing an issue, enable `duplicate_detection` and call `find_duplicate` with the repository owner, name, and issue number. The tool returns ranked duplicate candidates; optional threshold and pagination parameters are available.",
    "examples": [
      "find_duplicate({\"owner\":\"<owner>\",\"repo\":\"<repo>\",\"issue_number\":<issue_number>})",
      "github-mcp-server --features=duplicate_detection",
      "X-MCP-Features: duplicate_detection"
    ],
    "gotchas": [
      "Version: v1.9.0",
      "duplicate_detection (required): Feature flag that enables the non-default `find_duplicate` tool.",
      "owner (required): Repository owner.",
      "repo (required): Repository name.",
      "issue_number (required): Number of the existing issue to find duplicates for.",
      "confidence_threshold: Minimum candidate similarity threshold; higher values are stricter. Omitted uses the API's high-precision default; the API defines the scale.",
      "page: Pagination page number; minimum 1.",
      "perPage: Results per page; minimum 1, maximum 100.",
      "Prerequisite: The tool requires the `repo` OAuth scope.",
      "Prerequisite: Enable the flag on a local server with `--features=<flag>` or `GITHUB_FEATURES=<flag>`, or on a remote server with the `X-MCP-Features` header.",
      "find_duplicate is non-default and gated by the duplicate_detection flag."
    ]
  },
  "why_it_matters": "Check for duplicate issues when reviewing issues in a repository with duplicate detection enabled.",
  "sources": [
    "https://github.com/github/github-mcp-server/releases/tag/v1.9.0",
    "https://github.com/github/github-mcp-server/blob/v1.9.0/docs/feature-flags.md"
  ],
  "rank": 0.91029,
  "judge": {
    "publish": true,
    "judge_model": "codex-cli/gpt-6-luna+typesafe/jev-1.13.0",
    "prompt_version": "extract-v7+enrich-v1+judge-v2x3+jev-publish-v1"
  },
  "review_state": "approved",
  "provenance": {
    "run_id": "augsep-20261008",
    "verdict_id": "augsep-20261008:augsep-20261008-96367d3ec1acd284-5:gate",
    "evidence_hash": "9a9f095c5ea19342ea95ff11305109f8510b1144706f7c6b213216976139627f"
  },
  "review": {
    "draft_hash": "4619fdd14ebb957c6dfc2de72d0e974829326ee1003578d7dadd74d092a673a6",
    "reviewer": "publication-gate",
    "reviewed_at": "2026-10-07T00:00:00.000Z",
    "decision": "augsep-20261008:gate",
    "reason": "2 of 3 judge runs approved with p_yes >= 0.9 (mean 0.91 >= 0.9; 2 needed) and Jev gave 0.67 (>= 0.6 needed)."
  }
}