GitHub MCP Server

Instructions

Implementation Reference

• index.ts:515-522 (handler)

  The handler logic in the main switch statement that parses arguments, calls the createPullRequestReview function, and returns the result.

  case "create_pull_request_review": {
    const args = pulls.CreatePullRequestReviewSchema.parse(request.params.arguments);
    const { owner, repo, pull_number, ...options } = args;
    const review = await pulls.createPullRequestReview(owner, repo, pull_number, options);
    return {
      content: [{ type: "text", text: JSON.stringify(review, null, 2) }],
    };
  }

• operations/pulls.ts:108-120 (schema)

  Zod schema defining the input parameters for the create_pull_request_review tool.

  export const CreatePullRequestReviewSchema = z.object({
    owner: z.string().describe("Repository owner (username or organization)"),
    repo: z.string().describe("Repository name"),
    pull_number: z.number().describe("Pull request number"),
    commit_id: z.string().optional().describe("The SHA of the commit that needs a review"),
    body: z.string().describe("The body text of the review"),
    event: z.enum(['APPROVE', 'REQUEST_CHANGES', 'COMMENT']).describe("The review action to perform"),
    comments: z.array(z.object({
      path: z.string().describe("The relative path to the file being commented on"),
      position: z.number().describe("The position in the diff where you want to add a review comment"),
      body: z.string().describe("Text of the review comment")
    })).optional().describe("Comments to post as part of the review")
  });

• index.ts:166-169 (registration)

  Tool registration in the list of available tools, including name, description, and input schema reference.

    name: "create_pull_request_review",
    description: "Create a review on a pull request",
    inputSchema: zodToJsonSchema(pulls.CreatePullRequestReviewSchema)
  },

• operations/pulls.ts:209-223 (helper)

  The core helper function that makes the GitHub API request to create the pull request review.

  export async function createPullRequestReview(
    owner: string,
    repo: string,
    pullNumber: number,
    options: Omit<z.infer<typeof CreatePullRequestReviewSchema>, 'owner' | 'repo' | 'pull_number'>
  ): Promise<z.infer<typeof PullRequestReviewSchema>> {
    const response = await githubRequest(
      `https://api.github.com/repos/${owner}/${repo}/pulls/${pullNumber}/reviews`,
      {
        method: 'POST',
        body: options,
      }
    );
    return PullRequestReviewSchema.parse(response);
  }