Use when you need to write or review programmatic JDBC with Spring — including JdbcTemplate, NamedParameterJdbcTemplate, JdbcClient (Spring Framework 6.1+), parameterized SQL, RowMapper mapping to records, batch operations, transactions, safe handling of generated keys, DataAccessException handling, read-only transactions, streaming large result sets, and @JdbcTest slice testing. Part of the skills-for-java project