Classify and route DevOps chat requests with Mattermost and Claude

Automatically classify and route DevOps requests from your team chat using LLM + on-call calendar lookup. What it does This workflow turns your Mattermost channel into a smart DevOps intake system. When someone mentions @devops-duty, the workflow:

1. Receives the message via Mattermost outgoing webhook 1. Classifies the request into one of 8 categories using an LLM 1. Looks up the current on-call engineer from Google Calendar 1. Routes the request through a Switch node based on category 1. Acknowledges in a Mattermost thread with the classification result

Categories createresource - Provision new databases, secrets, services, DNS records incident - Something is broken — production or staging issues question - Information requests, status checks, clarifications cicderror - Build failures, deployment issues, GitHub Actions problems limits - Billing limits, quotas exceeded changerequest - Modify existing infrastructure or configuration codeapprove - Code review and merge request approvals other - Anything that doesn't fit above

Extending Each Switch output is an independent branch — connect sub-workflows or additional nodes per category. For example:

incident → trigger an AI investigation sub-workflow with MCP tools (Kubernetes, Grafana, etc.) createresource → run a provisioning playbook cicderror → fetch GitHub Actions logs and analyze failures

Connect these workflows: - [incident](https://n8n.io/workflows/15610) - [newsystem, modify infrastructure](https://n8n.io/workflows/15614) - [cicderror](https://n8n.io/workflows/15610) - [question](https://n8n.io/workflows/15629)