Do Not Rewrite Before You Understand
Why brownfield modernization starts with discovery, not a heroic platform replacement.
Why brownfield modernization starts with discovery, not a heroic platform replacement.
A practical note from the TDK field guide for teams building service-heavy products without turning local development into infrastructure work.
Understand before replacing
Why brownfield modernization starts with discovery, not a heroic platform replacement. This article is part of the TDK field guide: practical notes for teams that want clearer specs, faster local feedback, and fewer development rituals.
The useful question is not whether migration is fashionable. The useful question is whether it helps a developer make the next correct change with less waiting and less hidden context.
Small explicit steps beat platform rewrites
Specs, templates, and conventions are useful only when they stay attached to a working system. A clean document cannot prove that ports are assigned, credentials resolve, generated clients match services, or the local stack still boots.
That is why TDK keeps the practical layer close to the source of truth. The same service definition can inform local orchestration, generated files, generated diagrams, and assistant briefings.
Where TDK helps brownfield repos become legible
TDK matters here because it turns service definitions into a runnable local surface. Docker, TypeScript, Tilt, Starlark, generated docs, credentials, and assistant context all become part of the same workbench instead of separate chores.
For do not rewrite before you understand, the point is simple: keep the system inspectable. A team should be able to understand what exists, run what matters, and carry the generated output forward without depending on opaque platform behavior.