whetstone_DSL/tmp_eval_large_specs_20260303/cp_027_java.md

S3 to Warehouse Loader (cp_027)

Objective

Build a loader from object storage to warehouse with schema evolution and retry checkpoints.

Language & Library Constraints

• Primary language: java
• Available libraries: spring-boot, jackson, jooq, flyway
• Use library APIs explicitly where suitable in execution contracts.

Acceptance

• Deterministic taskitems with strict execution contracts.
• Include selected library and preferred APIs when applicable.