proapibackendhttp
API Design
Design HTTP APIs with stable resources, error shapes, pagination, and idempotency.
API Design Use this skill when adding or changing HTTP endpoints in a Next.js App Router app. Goal Stable resources, boring errors, and handlers that fail closed. Prefer route handlers under app/api. Method 1. Name the resource (/api/checkout, /api/auth/login), not the verb (/api/doCheckout). 2. Use POST for actions that create sessions or side effects. Do n…
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