The migration everyone deferred because it cost millions.
Legacy modernization sat on the shelf for one reason. The math. Years of specialist time, seven figures of budget, and a real chance of breaking the thing that runs the business.
A governed AI pipeline changes the input costs by orders of magnitude. The compute to translate 14,100 lines was $3.46. That is not the differentiator on its own. Cheap output you cannot trust is worthless.
The differentiator is the Verifier and the gate. The new system is proven against the old, behavior for behavior, and no cutover happens without a human saying go.
Six agents. One conductor.
Each agent owns one job and hands off a checkable artifact. The Concertmaster keeps them in time and keeps the record. The Architect maps to whatever target you point at; the Keystone runtime is the default, not the required destination.
Cartographer
Maps the legacy system. Every dependency, every seam, every place the behavior actually lives.
Architect
Designs the cloud-native target. What each piece becomes, and why it earns its place.
Migrator
Does the translation. Reads the map and the target, writes the cloud-native code against both.
Verifier
Proves the new matches the old, behavior for behavior. This is the agent the whole thing rests on.
Cutover Pilot
Runs the switch. The irreversible step sits behind the gate. A human decides go.
Concertmaster
Conducts the other five and keeps the ledger. The team answers to it. It answers to you.
One real run, on the record.
A legacy codebase, mapped, rebuilt cloud-native, and verified against the original. Every finding is severity-graded, dispositioned, and posted to the register you can check for yourself.
The $3.46 is the cheap part and the least important. What you are paying for is the Verifier's proof and a cutover that a human, not a model, authorized.
What you hand us, and what you get back.
Parity is the floor. Discovery is named.
The Verifier treats the legacy system as the correctness oracle. When it surfaces a behavior that looks unintended, that behavior lands in one of three buckets. It is never silently corrected.
Intended, undocumented
Preserved as-is and written into the cutover runbook, so the next operator knows the behavior is load-bearing.
Bug, fix wanted
Priced as a scoped change inside the engagement and verified as a deviation, never absorbed into parity.
Bug, keep as-is
Preserved and acknowledged in writing as a deferred-defect item with a tracking ID for later remediation.
Parity protects the customer. Discovery protects the relationship. Both are named clauses, never assumed.