Tracing Downstream Lineage

Before you drop a column or refactor a DAG, this traces what downstream tables, dashboards, and ML models will break. It walks you through building a dependency tree by searching DAG source code, querying information schema for dependent views, and categorizing impact by criticality (production dashboards versus ad hoc analyst queries). The output is an impact report with a visual diagram, stakeholder list, and specific migration tasks. If you're on Astro, the Lineage tab does some of this automatically, but this skill gives you the systematic checklist for when you need to assess blast radius manually. Basically prevents the "I changed one table and now three teams are pinging me" scenario.

Install to Claude Code

npx -y skills add astronomer/agents --skill tracing-downstream-lineage --agent claude-code