What didn't work well

• 6 min downtime due to a mistake in message group configuration

What worked well

• Alerting worked

How were we lucky:

• Abijeet was around and was able to quickly determine cause and fix it

Action items:

• Check that all deployers are subscribed to uptime alerts
  • T259224: Ensure all deployers get downtime alerts
• Config updates are applied immediately – consider requiring them to be deployed too
  • T259223: Require full deployments for configuration changes
• Lack of automated CI testing for message group configuration, we'd like to have this
  • T246896: Implement schema validation for message group configuration as part of CI for translatewiki repository