During August 2025, this developer enhanced SQL subquery handling in the actiontech/sqle repository by improving the extraction logic for subqueries used as table sources in the FROM clause. Using Go and leveraging expertise in database internals and SQL parsing, they aligned the new logic with existing handling for WHERE, IN, and EXISTS clauses, enabling more accurate parsing of complex queries. They also refactored and updated unit tests to better reflect the behavior of nested subqueries, ensuring that rule violations are detected based on subquery depth and usage. The work demonstrated thoughtful attention to correctness and maintainability in SQL rule enforcement.