index1.js

/**
 * This is the entry point for your Probot App.
 * @param {import('probot').Application} app - Probot's Application class.
 */
module.exports = app => {
  // Your code here
  app.log('Yay, the app was loaded!')


  // For more information on building apps:
  // https://probot.github.io/docs/

  // To get your app running against GitHub, see:
  // https://probot.github.io/docs/development/
}

index2.js

/**
 * This is the entry point for your Probot App.
 * @param {import('probot').Application} app - Probot's Application class.
 */
module.exports = app => {
  // Your code here
  app.on('*', async context => {
    app.log(context)
  })
}

index3.js

// ...
module.exports = app => {
  // Your code here
  app.on('issues.opened', async context => {
    app.log(context.issue())
    // => {owner: 'username', repo: 'reponame', number: 123}
  })
}

index4.js

// ...
module.exports = app => {
  // Your code here
  app.on('issues.opened', async context => {
    const params = context.issue({labels: ['needs-triage']})
    // params => {owner: 'username', repo: 'reponame', number: 123, labels: ['needs-triage']}
  })
}

index5.js

// ...
module.exports = app => {
  // Your code here
  app.on('issues.opened', async context => {
    const params = context.issue({labels: ['needs-triage']})
    // => {owner: 'username', repo: 'reponame', number: 123, labels: ['needs-triage']}
    await context.github.issues.addLabels(params)
  })
}