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Solutions

Understand the system. Move the work forward.

From your first day in a codebase to the next architectural decision. Put relationships, source and engineering questions in the same picture.

From entry point to supporting code

The checkout entry point reaches a service, its payment and order dependencies, a validation contract and a test. Lines illustrate static relationships, not runtime execution.

Entry pointcheckout.test.ts
01
Checkout servicecheckout-service.ts
02
Payment gatewaypayment-gateway.ts
03
Order moduleorder-service.ts
04
Validation contractvalidation.ts
05
Related checkscheckout.test.ts
06
Selected module · Static relationships · Supporting checks
Preserve the contract while changing the implementation

Map a legacy module and its consumers, define the boundary to preserve, and review a replacement against existing contracts and checks.

Legacy moduleUnderstand current behavior
01
Stable boundaryContract to preserve
02
ReplacementProposed implementation
03
ConsumersFind who depends on it
04
Existing checksReview assumptions
05
Mapping supports planning. Behavior still needs validation.
ModernizationExplorer

Modernize with a view of the existing system

Changing a mature system starts with understanding the boundaries it already has.

Identify boundaries, inspect coupling and plan smaller changes using the relationships already present in the code.

Explore solution

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