One script tag for the widget, a React component if you would rather, your own users signed in, and an event for everything that happens on a board.
One script tag, two placements, and the tokens it reads from you.
The component, its props, and what it takes down on unmount.
Signing your own users in, and proving the token before you ship.
Webhooks, their signature, their retries, and Slack on top.
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