Validates, lints, and security-scans Azure DevOps Pipeline configurations (azure-pipelines.yml / azure-pipelines.yaml). Use when working with ADO pipelines, YAML pipeline files, or CI/CD configurations in Azure DevOps — including validating YAML syntax and schema, detecting hardcoded secrets or credentials, checking for deprecated or unpinned task versions, enforcing best practices (caching, timeouts, display names), performing pipeline security audits, or reviewing azure-pipelines.yml before merging. Trigger terms: azure-pipelines.yml, ADO pipeline, Azure Pipelines, YAML pipeline, CI/CD validation, pipeline security scan, DevOps configuration review.