Summary

• Extend deepStrict to recurse through Zod intersection wrappers instead of rejecting them as unsupported.
• Merge object-intersection shapes before strictification so valid combined objects remain accepted while unknown nested keys are rejected.
• Preserve both validators for overlapping object keys and cover chained object intersections.

Verification

• Evaluated valid, unknown-key, chained, and overlapping-key intersection inputs through a direct deepStrict runtime check.

Visual Changes

N/A

Reviewer Notes

• Object-intersection branches are merged before rebuilding a strict object because independently strictifying disjoint object branches would reject each branch's valid sibling keys.
• The focused Jest suite could not complete in this sandbox because its global setup requires Postgres and Docker is unavailable.