Payload CMS v3.81 withPayload() injects a turbopack config key that Next.js 16.0.10 rejects in production builds (needs >=16.1). Load withPayload only in dev; production gets a pass-through. Payload admin works locally; production serves blog/changelog as regular Next.js pages querying the Payload API. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>