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Optimize images, fonts, scripts, and metadata for Next.js performance and Core Web Vitals. Use when configuring next/image for LCP, next/font for zero layout shift, next/script loading strategies, or generateMetadata for SEO.
Standardize BRD and BRD-lite discovery for business goals, stakeholder impact, current-to-future state, and measurable value outcomes. Use when creating BRD, business case, project justification, ROI narrative, or AS-IS to TO-BE scope.
Standardize PRD discovery and drafting for product scope, user outcomes, requirement IDs, and acceptance criteria. Use when creating PRD, product requirements, feature specification, or acceptance criteria plan.
Standardize SRS and FRS specifications for technical behavior, interfaces, data contracts, quality constraints, and verification mapping. Use when writing SRS, functional specification, system behavior requirements, API/data contracts, or non-functional thresholds.
Clarify a rough product or engineering idea into a BRD-lite brief (Why) with measurable business value.
Turn an approved PRD or implementation goal into SRS/FRS technical requirements (How), architecture, contracts, and verification decisions.
Plan a feature from BRD-lite brief or clear intent into PRD (What), decisions, implementation plan, and task slices.
| name | nextjs-optimization |
| description | Optimize images, fonts, scripts, and metadata for Next.js performance and Core Web Vitals. Use when configuring next/image for LCP, next/font for zero layout shift, next/script loading strategies, or generateMetadata for SEO. |
| metadata | {"triggers":{"files":["**/layout.tsx","**/page.tsx"],"keywords":["metadata","generateMetadata","next/image","next/font"]}} |
Core optimization primitives provided by Next.js. Monitor First, Optimize Later.
next/speed-insights, React Profiler.Always use next/image to prevent CLS and enable automatic optimization:
Use next/font for zero layout shift — self-hosts fonts and adds font-display: swap:
Use next/script with appropriate loading strategies:
beforeInteractive: Critical scripts (polyfills).afterInteractive: Analytics (Google Analytics).lazyOnload: Chat widgets, social embeds.@next/bundle-analyzer. Prune heavy libraries; use ESM-tree-shakable dependencies.dynamic imports with Suspense for large components not needed at initial render.ppr: true (Partial Prerendering) in Next.js 15+ for static shell + dynamic islands.<img> tag: Use next/image to prevent CLS and enable automatic optimization.next/font to self-host and eliminate layout shift._document.tsx: Use export const metadata or generateMetadata().<head>: Use next/script with appropriate strategy.