What is Adapter?
Wraps an object with a different interface so existing code can use it without rewrites.
old plug · new socket · adapter
Adapter converts…
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In real work
Adapter: LegacyPaymentAdapter wraps our old billing API so checkout still uses PaymentGateway.
In the illustration
The old round-pin plug bumps against the square gateway socket and won't go in; an adapter sleeve slides over it and the plug seats with a click, the legacy unit unchanged inside.
Write an adapter in your coding agent so the legacy LegacyUserRecord can be passed anywhere the new User protocol is expected, without touching the legacy code.
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