TIL: You can use webhooks to trigger workflows from Slack

Just figured out a neat trick for automating our LogicGate review workflows. We were stuck in the loop of "did the deployment finish?" and manually checking Slack, then manually triggering the LogicGate review workflow. It was flaky and someone always forgot.

Turns out you can configure a Slack app to send a webhook directly to LogicGate's API endpoint. Now when our CI pipeline finishes, it posts to a specific Slack channel, and that message triggers the review workflow automatically.

Here's the basic setup for the Slack side (you need admin rights to create the app):

```yaml
# Example of the CI step that posts to Slack (GitHub Actions)
- name: Notify Slack and Trigger Review
env:
SLACK_WEBHOOK_URL: ${{ secrets.SLACK_REVIEW_WEBHOOK }}
DEPLOYMENT_URL: ${{ steps.deploy.outputs.url }}
run: |
curl -X POST -H 'Content-type: application/json'
--data '{
"text": "Deployment to staging successful. Environment: $DEPLOYMENT_URL",
"trigger_logicgate_review": true
}'
$SLACK_WEBHOOK_URL
```

Then in Slack, you create an "Incoming Webhook" app, and in its settings, add a "Workflow" that triggers on a message containing a specific keyword (like "trigger_logicgate_review"). That workflow step is a webhook to your LogicGate instance's API.

Key points:
* The Slack app needs to be in the workspace/channel where the CI posts.
* The LogicGate API endpoint needs to be publicly reachable or use a tunnel.
* You can make it more secure by having LogicGate validate a secret sent in the webhook header.

This cuts out the manual step completely. The build finishes, Slack gets the message, LogicGate starts the review. No more context switching or waiting.