github-mcp-server adds gated find_duplicate tool
Introduced 2026-08-10 · score 0.91
HOW TO USE IT
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.
find_duplicate({"owner":"<owner>","repo":"<repo>","issue_number":<issue_number>})github-mcp-server --features=duplicate_detectionX-MCP-Features: duplicate_detectionWHY THIS HELPS
Check for duplicate issues when reviewing issues in a repository with duplicate detection enabled.
REQUIREMENTS AND LIMITATIONS
- 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.
FIRST-PARTY EVIDENCE
- 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
Check the installed version and the source before using it. Entry JSON