etl-lineage-explainer

When to invoke

• You have a folder of SQL files (or a single SQL script) that implements ETL/ELT.
• You need a quick, readable lineage view: sources → targets, plus joins/filters hints.
• You want a lightweight, vendor-neutral approximation (not a full SQL parser).

Inputs needed

• Path to one SQL file or a directory containing .sql files.
• (Optional) Output path for a JSON summary.