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[WF] add docs for Workflow Automation Slack emoji reaction trigger #35910

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[WF] add docs for Workflow Automation Slack emoji reaction trigger #35910

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[WF] add docs for Workflow Automation Slack emoji reaction trigger
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16 changes: 15 additions & 1 deletion content/en/actions/workflows/trigger.md
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Expand Up @@ -200,7 +200,9 @@ You can trigger a workflow from GitHub using the following steps.

<div class="alert alert-info"><strong>Quick start</strong>: Click to create a <a href="https://app.datadoghq.com/workflow/create?source=slack">workflow</a> with a Slack trigger.</div>

You can trigger a workflow from Slack using the following steps.
You can trigger a workflow from Slack manually with the `/datadog workflow` command, or automatically when an emoji reaction is added to a message.

### Manual Slack trigger

1. Add a Slack trigger to your workflow:
- If your workflow doesn't have any triggers, click **Add Trigger** > **Slack**.
Expand All @@ -210,6 +212,18 @@ You can trigger a workflow from Slack using the following steps.
1. Click **Publish** to publish the workflow. A workflow must be published before you can trigger it from Slack. Published workflows accrue costs based on workflow executions. For more information, see the [Datadog Pricing page][11].
1. In a Slack channel with the Datadog App, run `/datadog workflow` to select and run a workflow. You can also use the `/dd` alias to run /datadog commands.

### Emoji reaction Slack trigger

You can configure a workflow to trigger automatically when a user adds a specific emoji reaction to a message in Slack.

1. Add a Slack trigger to your workflow:
- If your workflow doesn't have any triggers, click **Add Trigger** > **Slack**.
- If your workflow already has one or more triggers and you're adding the Slack trigger as an additional trigger, click the **Add Trigger** (lightning bolt) icon and select **Slack**.
1. In the **Configure** tab, select the Slack workspace where you want to listen for reactions.
1. If the workspace requires the `emoji:read` permission, click **Enable Permission** to reinstall the Slack app with the necessary scope.
1. Select one or more emoji reactions that trigger the workflow.
1. Click **Save**, then **Publish**.

## API triggers

Triggering a workflow using an API call requires an [API key][8] and an [application key][9] with the `workflows_run` scope. For information on adding a scope to an application key, see [Scopes][10].
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