# 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.