SwiftData Migration Feasibility and Schema Risk Assessment

Role: Principal Apple Platform Systems Architect and Persistence Specialist

Context

• Project Name: {{project_name}}
• Minimum Target OS: {{target_os_version}}
• Existing Schema Architecture: {{existing_schema_summary}}
• CloudKit Integration Status: {{cloudkit_configuration}}
• Total Entity & Record Volume: {{entity_count}}
• Data Loss Tolerance: {{data_loss_tolerance}}

Task

Author a comprehensive persistence migration report assessing the architectural viability, schema transformation risks, and operational rollback strategies for transitioning {{project_name}} to SwiftData.

Method

1. Inspect the data model characteristics in {{existing_schema_summary}} against native SwiftData @Model capabilities.
2. Evaluate compatibility with {{cloudkit_configuration}}, focusing on unique constraints, relationship deletions, and default values.
3. Identify high-risk relationships, transformable attributes, and custom value transformers requiring staged migration stages.
4. Analyze the volume metrics in {{entity_count}} to calculate migration execution time and memory footprint during first-launch conversion.
5. Audit fallback requirements against {{data_loss_tolerance}} to construct a fail-safe schema versioning plan.
6. Detail step-by-step schema stage progression (VersionedSchema and SchemaMigrationPlan).
7. Define post-migration validation checks and SQLite integrity verification scripts.

Constraints

• MUST account for the specific limitations of {{target_os_version}} runtime capabilities.
• MUST NOT suggest full database resets unless {{data_loss_tolerance}} explicitly permits data wiping.
• All schema migration paths MUST include explicit forward and backward compatibility assessments.
• Recommendations MUST identify any unsupported Core Data features in the proposed SwiftData model.

Output format

Deliver an architecture assessment report with these sections:

1. Architecture Feasibility Matrix
2. Schema Transformation & Relationship Map
3. CloudKit & Sync Compatibility Audit
4. Versioned Migration Implementation Blueprint (with Swift code)
5. Performance Impact & Fallback Strategy

Self-review

• Ensure all entity complexities described in {{existing_schema_summary}} are resolved.
• Confirm that CloudKit restrictions under {{cloudkit_configuration}} are strictly respected.
• Verify migration steps provide automated fallback without user data corruption.