Add attachment

addAttachment adds a URL attachment and can use it as the card cover. It does not upload local file bytes.

automations/attach-trello-link.automation.ts

import { automation, onHttpRequest } from "automate.ax"
import { addAttachment } from "automate.ax/trello"

export default automation("Attach release notes", () => {
  onHttpRequest({ scope: "automation" })
  addAttachment({
    card: "card-id",
    url: "https://automate.ax/releases/1",
    name: "Release notes",
    setCover: false,
  })
})

card and valid public url are required. Optional name sets the display label; setCover defaults to false; account defaults to the project binding. Returns Signal<TrelloAttachment> with id, name, url, createdAt, position, isUpload, and nullable bytes and mimeType. Keep id for deletion.

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