data-lineage-tracer
Data Lineage Tracer Protocol
This skill answers the critical question: "If I change this column, who dies?" It traces the flow of data backward (Upstream) to its source, and forward (Downstream) to its consumers.
Core assumption: Data does not exist in a vacuum. It flows through Views, Materialized Views, Stored Procedures, Triggers, and ORM boundaries.
1. Upstream & Downstream Mapping (Static vs Dynamic)
- Default (Static): Analyze based on provided
.sql, schema files, and application ORM code (e.g. Prisma models). - Dynamic (On-Demand): Only connect to the database to inspect dynamic dependencies (e.g. live
pg_viewsorinformation_schema.triggers) if requested explicitly. If assessingreporting.daily_sales.total_amount: - Is it a physical physical or a computed column?
- Does a
VIEWproject it directly frompublic.orders? - Is it populated via a daily
INSERT INTO ... SELECTcron job?
Downstream Tracing (Who uses it?)
If dropping public.users.phone_number:
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