import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { z } from "zod";
import { DateTime, Info } from "luxon";
export function register(server: McpServer): void {
server.tool(
"get_month_info",
"Get detailed information about a specific month including number of days, first/last day weekday, whether it's a leap year, and quarter.",
{
year: z.number().int().describe("Year (e.g. 2024)"),
month: z.number().int().min(1).max(12).describe("Month (1-12)"),
},
async ({ year, month }) => {
const dt = DateTime.fromObject({ year, month, day: 1 });
if (!dt.isValid) {
return { content: [{ type: "text", text: JSON.stringify({ error: "Invalid year/month" }) }] };
}
const daysInMonth = dt.daysInMonth!;
const lastDay = DateTime.fromObject({ year, month, day: daysInMonth });
const result = {
year,
month,
monthName: dt.monthLong,
daysInMonth,
firstDayWeekday: dt.weekdayLong,
firstDayWeekdayNumber: dt.weekday, // 1=Monday, 7=Sunday (ISO)
lastDayWeekday: lastDay.weekdayLong,
lastDayWeekdayNumber: lastDay.weekday,
isLeapYear: dt.isInLeapYear,
quarter: dt.quarter,
weekCount: Math.ceil((daysInMonth + dt.weekday - 1) / 7),
};
return { content: [{ type: "text", text: JSON.stringify(result, null, 2) }] };
}
);
}
