MIGRATION
System migration & legacy migration: understand before you migrate.
Replacing code is not the same as preserving the system. Migration starts by establishing what can actually be known about the source and which properties must survive in the target.
System migration, legacy migration and software migration are different search terms for the same hard question: what must remain true when the implementation changes? ATLAS starts with source reality, dependencies and evidence before migration decisions are made.
SOURCE
Reconstruct before replacing.
Observe structure, relations, behavior, state, effects, failures, documents and relevant runtime surfaces where available.
BlueCode, document analysis, pattern recognition and intelligent deepening contribute different evidence surfaces.
TRANSFORM
Preserve properties · reuse · compose · replace · build.
A monolithic rewrite is not the default model. The legacy system itself is not the reuse target; qualified properties, domain logic, data meaning and required capabilities are.
The correct treatment is qualified per capability and scope.
TARGET
Migration closes only after reobservation.
The target is observed again and compared against the qualified source requirements and behaviors.
No universal semantic-equivalence or successful-migration claim exists without case-bound evidence.
Use World Scanner for read-only source and dependency discovery →