You're designing a PATCH endpoint that allows partial updates to a complex nested resource. How do you distinguish between 'set to null' and 'leave unchanged'? Walk through your wire format.

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Stay specific. One example, told well, beats three told fast. Make your decisions visible — what you chose between. End on what changed, for whom.

You're designing a PATCH endpoint that allows partial updates to a complex nested resource. How do you distinguish between 'set to null' and 'leave unchanged'? Walk through your wire format.

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