Host project migrated from PROSERVE_UE_5_5 to PROSERVE_UE_5_7 in April 2026. CLAUDE.md, memory index, project notes, and build reference now point at the new path / target / engine version. The 5.5 host is flagged deprecated to avoid accidental builds against it. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>