schedkit-universal

Scheduling & Reminders you can reuse anywhere (NestJS, Express, any Node app). Supports:

• Time zones (IANA via Luxon)
• Natural language (tomorrow 9am IST, in 15 minutes) via Chrono
• Cron (*/5 * * * *) via cron-parser
• RRULE (FREQ=DAILY;BYHOUR=9;BYMINUTE=0;BYSECOND=0;TZID=Asia/Kolkata)
• One-shot reminders & recurring schedules
• Webhook dispatch + programmatic handlers
• Storage adapters: in-memory and MongoDB
• Express/Nest adapters, CLI worker

Install

npm i schedkit-universal luxon rrule cron-parser chrono-node mongodb

Define and run

import { createScheduler, MongoStorage } from "schedkit-universal/core";
import { MongoClient } from "mongodb";

const client = new MongoClient(process.env.MONGO_URI!);
await client.connect();
const storage = new MongoStorage(client.db(process.env.MONGO_DB));

const scheduler = createScheduler({
  storage,
  defaultTz: "Asia/Kolkata",
  dispatch: async (job) => {
    // YOUR handler: send email / push / whatever
    console.log("Reminder fired:", job.name, job.payload);
  }
});

scheduler.start(); // background tick

Create reminders (Express)

import express from "express";
import { createScheduleRouter } from "schedkit-universal/express";
const app = express();
app.use(express.json());
app.use("/api/schedule", createScheduleRouter(scheduler));

POST /api/schedule/jobs

{
  "name": "Daily standup",
  "tz": "Asia/Kolkata",
  "rrule": "FREQ=WEEKLY;BYHOUR=10;BYMINUTE=0;BYSECOND=0;BYDAY=MO,TU,WE,TH,FR",
  "payload": { "room": "huddle-1" }
}

or natural language

{ "name": "Hydrate!", "nlp": "in 20 minutes", "tz": "Asia/Kolkata" }

or cron

{ "name": "Nightly job", "cron": "0 2 * * *", "tz": "UTC" }

CLI

# run a worker loop using Mongo
npx schedkit worker --uri "$MONGO_URI" --db mydb --tz "Asia/Kolkata"

# schedule via CLI (natural language)
npx schedkit schedule --name "Demo" --nlp "tomorrow 9am" --tz "Asia/Kolkata"

Notes

• DST-safe (RRULE/Luxon). For cron, we evaluate in the specified TZ each tick.
• Misfire protection via short lease; jobs won’t double-fire in multi-process setups (Mongo storage).
• You can export ICS later; extend dispatch to email/calendar.

MIT