Lineage Diff

Requirements

Agent: any (read-only analysis) Tools used: lineage_check, read, bash (for git operations), glob

Compare column-level lineage between two versions of a SQL model to identify changes in data flow.

Workflow

1. Get the original SQL — Either:

   • Read the file from disk (current committed version)
   • Use git show HEAD:path/to/file.sql via bash to get the last committed version
   • Accept the "before" SQL directly from the user

2. Get the modified SQL — Either:

   • Read the current (modified) file from disk
   • Accept the "after" SQL directly from the user