Integrate Slack Notifications for Pipeline Events

[fuzziecoder]

🎯 Issue Summary

Add Slack integration to send real-time notifications when pipelines start, complete, or fail.

📋 Current Behavior

Pipeline events are only visible in the dashboard - no external notifications.

Current Architecture:

• WebSocket events emitted from backend
• No third-party notification integrations

✨ Desired Behavior

• Slack webhook integration for pipeline events
• Configurable notification channels per pipeline
• Rich message formatting with execution details
• Threaded updates for multi-stage pipelines

🔧 Technical Requirements

1. Slack Client Setup

• Add slack-sdk to requirements.txt
• Create backend/integrations/slack.py
• Add SLACK_WEBHOOK_URL to config

2. Notification Service

• Create SlackNotifier class
• Implement send_execution_started()
• Implement send_execution_completed()
• Implement send_execution_failed()

3. Message Formatting

• Use Slack Block Kit for rich messages
• Include pipeline name, execution ID, duration
• Add color coding (green=success, red=failure)
• Include link to dashboard

4. Integration Points

• Hook into pipeline executor events
• Send notifications after each execution state change
• Support multiple Slack channels

5. Configuration

• Add per-pipeline Slack channel configuration
• Support webhook URL per environment
• Add enable/disable toggle

📝 Acceptance Criteria

• ✅ Slack messages sent on pipeline start/complete/fail
• ✅ Messages include execution details and dashboard link
• ✅ Color-coded based on execution status
• ✅ Configurable per pipeline
• ✅ Graceful handling if Slack is unavailable

💡 Implementation Example

# backend/integrations/slack.py  [2](#header-2)
from slack_sdk.webhook import WebhookClient  
  
class SlackNotifier:  
    def __init__(self, webhook_url: str):  
        self.client = WebhookClient(webhook_url)  
      
    async def send_execution_started(self, pipeline_id: str, execution_id: str):  
        await self.client.send(  
            blocks=[  
                {  
                    "type": "section",  
                    "text": {  
                        "type": "mrkdwn",  
                        "text": f"🚀 Pipeline `{pipeline_id}` started\nExecution: `{execution_id}`"  
                    }  
                }  
            ]  
        )

📚 Resources
[Slack Block Kit](https://api.slack.com/block-kit)
[Slack Webhooks](https://api.slack.com/messaging/webhooks)

[Koder-Kartik]

Hi @fuzziecoder , I want to work on this issue , assign it to me