GitHub MCP Server

Instructions

Implementation Reference

• operations/issues.ts:113-126 (handler)

  The core handler function that executes the tool logic by making a PATCH request to the GitHub Issues API to update the specified issue.

  export async function updateIssue(
    owner: string,
    repo: string,
    issue_number: number,
    options: Omit<z.infer<typeof UpdateIssueOptionsSchema>, "owner" | "repo" | "issue_number">
  ) {
    return githubRequest(
      `https://api.github.com/repos/${owner}/${repo}/issues/${issue_number}`,
      {
        method: "PATCH",
        body: options,
      }
    );
  }

• operations/issues.ts:44-54 (schema)

  Zod schema defining the input options for the update_issue tool, including owner, repo, issue_number, and optional fields like title, body, assignees, etc.

  export const UpdateIssueOptionsSchema = z.object({
    owner: z.string(),
    repo: z.string(),
    issue_number: z.number(),
    title: z.string().optional(),
    body: z.string().optional(),
    assignees: z.array(z.string()).optional(),
    milestone: z.number().optional(),
    labels: z.array(z.string()).optional(),
    state: z.enum(["open", "closed"]).optional(),
  });

• index.ts:126-129 (registration)

  Tool registration in the ListTools response, specifying name, description, and input schema.

    name: "update_issue",
    description: "Update an existing issue in a GitHub repository",
    inputSchema: zodToJsonSchema(issues.UpdateIssueOptionsSchema)
  },

• index.ts:450-457 (handler)

  Dispatch handler in the central CallToolRequest switch that parses arguments and calls the updateIssue function.

  case "update_issue": {
    const args = issues.UpdateIssueOptionsSchema.parse(request.params.arguments);
    const { owner, repo, issue_number, ...options } = args;
    const result = await issues.updateIssue(owner, repo, issue_number, options);
    return {
      content: [{ type: "text", text: JSON.stringify(result, null, 2) }],
    };
  }