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Gradual rewrite, expand–migrate–contract, and continuity during change — risk reduction without fake zero-downtime claims.
legacy code without tests
hidden coupling between modules
need to migrate without pretending cutover is already proven
expand-migrate-contract plan
regression index
risk report without invented probabilities
big-bang rewrite without phasing
production migration without scoped approval
Modernization at UNX Code prefers evidence before promotion. Staging proof is not production proof. Rebuilds require new digests and re-gates.
Register the need with UNX Code — selection and activation stay operator-owned.