final_proof/KNOWN_LIMITS.md

Known Limits

This proof is static/source-oracle parity plus executable modern-service replay. It is not live COBOL/CICS all-path runtime equivalence.

• Proof grade B means static legacy data/copybook/source-oracle match. It does not mean the original COBOL/CICS system was executed and compared for every path.
• Proof grade A is reserved for actual legacy runtime trace match; this bundle records A=0.
• A_GRADE_PROMOTION_REPORT.json is the executable promotion gate. It fails closed unless accepted live legacy runtime trace records exist for every capability.
• NO_COST_CONFIDENCE_REPORT.json records maximum unpaid/pre-runtime evidence. It is designed to support review confidence, not to replace live legacy validation.
• The replay report executes the modern Python service against extracted static/source-oracle expectations. It is useful evidence, but not exhaustive path coverage.
• The source data and copybooks are from AWS CardDemo at the pinned source version in FINAL_RECEIPT_SUMMARY.json.
• The app is a local Python/SQLite modernization target. Production concerns such as deployment topology, operations, security hardening, and load testing are outside this proof bundle.
• Public release, upload, or promotion is intentionally not performed by this bundle.