Derailing Our Application: How and Why We...
summary
Cisco decouples about 800,000 lines of Ruby from Rails constructs by extracting business logic from controllers, models, and ERB views into plain Ruby objects organized into domain namespaces. The claim includes concrete measures: modularized code shows 97% test coverage versus ~78% for the rest, and average method complexity is 30% lower. The build is a restructured monolith (now ~4.2M LOC) that increases team autonomy while requiring new governance for cross‑domain impacts.
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