### Install Todoist using Snap on Linux

Source: https://www.todoist.com/help/articles/install-todoist-for-linux-KgKaJa6H

This snippet shows the terminal commands required to install Todoist using the Snap package manager on a Linux system. It includes the command to install the Todoist snap and a command to enable experimental features for app awareness during refreshes, which helps prevent disruptions.

```bash
sudo snap install todoist
sudo snap set core experimental.refresh-app-awareness=true
```

--------------------------------

### Install Todoist UI Extension Packages (npm)

Source: https://www.todoist.com/help/articles/build-your-first-todoist-ui-extension-Tu1aQhceS

Installs necessary packages for building a Todoist UI Extension, including express for the server, nodemon for development, and TypeScript-related packages. It also installs development dependencies for type checking.

```bash
npm init -y
npm install express nodemon ts-node typescript @doist/ui-extensions-core
npm install @types/express @types/node --save-dev
```

--------------------------------

### Todoist Action Bridge Example

Source: https://www.todoist.com/help/articles/build-your-first-todoist-ui-extension-Tu1aQhceS

Example of a Todoist response containing client-side actions (bridges). This specific example instructs the client to append text to the composer and then finish the extension.

```json
{
  "bridges": [
    {
      "bridgeActionType": "composer.append",
      "args": {
        "text": "Some text to append"
      }
    },
    {
      "bridgeActionType": "finished"
    }
  ]
}
```

--------------------------------

### Todoist UI Response Card Example

Source: https://www.todoist.com/help/articles/build-your-first-todoist-ui-extension-Tu1aQhceS

Example JSON structure for returning a UI element to the Todoist client, using an Adaptive Card format. This card displays a simple text block.

```json
{
  "card": {
    "type": "AdaptiveCard",
    "body": [{
        "text": "Welcome, my friend!",
        "type": "TextBlock"
    }],
    "...": "..."
  }
}
```