GitHub Enterprise MCP Server

Instructions

Implementation Reference

• src/tools/pull-requests.ts:364-390 (handler)

  The core handler function that validates input using Zod schema, calls the GitHub API (Octokit) to list review comments on a pull request, maps the response, and handles errors.

  export async function getPullRequestComments(args: unknown): Promise<any> {
    const { owner, repo, pull_number } = GetPullRequestCommentsSchema.parse(args);
    const github = getGitHubApi();
  
    return tryCatchAsync(async () => {
      const { data } = await github.getOctokit().pulls.listReviewComments({
        owner,
        repo,
        pull_number,
      });
  
      return data.map((comment) => ({
        id: comment.id,
        user: comment.user ? {
          login: comment.user.login,
          id: comment.user.id,
        } : null,
        body: comment.body,
        created_at: comment.created_at,
        updated_at: comment.updated_at,
        path: comment.path,
        position: comment.position,
        commit_id: comment.commit_id,
        url: comment.html_url,
      }));
    }, 'Failed to get pull request comments');
  }

• src/utils/validation.ts:174-176 (schema)

  Zod schema for input validation: requires owner, repo (from OwnerRepoSchema), and pull_number.

  export const GetPullRequestCommentsSchema = OwnerRepoSchema.extend({
    pull_number: z.number().int().positive(),
  });

• src/server.ts:977-999 (registration)

  Tool registration in the MCP server's listTools response, including name, description, and JSON schema matching the Zod schema.

  {
    name: 'get-pull-request-comments',
    description: 'Get the review comments on a pull request',
    inputSchema: {
      type: 'object',
      properties: {
        owner: {
          type: 'string',
          description: 'Repository owner (username or organization)',
        },
        repo: {
          type: 'string',
          description: 'Repository name',
        },
        pull_number: {
          type: 'number',
          description: 'Pull request number',
        },
      },
      required: ['owner', 'repo', 'pull_number'],
      additionalProperties: false,
    },
  },

• src/server.ts:1247-1249 (registration)

  Switch case in the callTool handler that dispatches execution to the getPullRequestComments function.

  case 'get-pull-request-comments':
    result = await getPullRequestComments(parsedArgs);
    break;

• src/tools/pull-requests.ts:13-13 (helper)

  Import of the input schema validator used in the handler.

  GetPullRequestCommentsSchema,