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tracing-downstream-lineage

Skill

Trace downstream data lineage and impact analysis. Use when the user asks what depends on this data, what breaks if something changes, downstream dependencies, or needs to assess change risk before modifying a table or DAG.

412Monitoring

Install

git clone https://github.com/astronomer/agents.git ~/.claude/skills/tracing-downstream-lineage

What is tracing-downstream-lineage?

Trace downstream data lineage and impact analysis. Use when the user asks what depends on this data, what breaks if something changes, downstream dependencies, or needs to assess change risk before modifying a table or DAG.

What this can do

Capabilities declared in this component's own frontmatter — not inferred.

Inherit all session tools

Declares no tool restrictions — inherits every session tool

~56 tokens of context used while enabled, before you invoke anything

Trust

87/100 · Excellent

2 factors scored below maximum

Documentation

README · ~3 min read

Downstream Lineage: Impacts

Answer the critical question: "What breaks if I change this?"

Use this BEFORE making changes to understand the blast radius.

Impact Analysis

Step 1: Identify Direct Consumers

Find everything that reads from this target:

For Tables:

  1. Search DAG source code: Look for DAGs that SELECT from this table
    • Use af dags list to get all DAGs
    • Use af dags source <dag_id> to search for table references

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