Design a search or filter endpoint that accepts a dozen optional query parameters. How do you validate combinations, communicate invalid filters, and avoid breaking clients when you add new filters?

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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.

Design a search or filter endpoint that accepts a dozen optional query parameters. How do you validate combinations, communicate invalid filters, and avoid breaking clients when you add new filters?

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