First plugin

A minimal plugin registers work during load and cleans it up during unload.

module.exports = class ExamplePlugin {
  constructor(app, manifest) {
    this.app = app;
    this.manifest = manifest;
  }

  async onload() {
    this.app.commands.register({
      id: "example-plugin:hello",
      name: "Say hello",
      callback: () => this.app.notices.show("Hello from a plugin"),
    });
  }

  async onunload() {
    // Dispose subscriptions, views, timers, and resources here.
  }
};

Put manifest.json and main.js in .obsidian/plugins/example-plugin/, then enable the plugin from settings.

Use documented services for commands, notices, vault access, settings, and events. Avoid reaching into DOM or workspace internals unless the API explicitly allows it.