Summary
Covers Next.js 16's environment variable system with the file precedence rules, NEXT_PUBLIC_ prefixing for client-side exposure, and deployment patterns for Vercel. You'll reach for this when setting up a new Next.js project or debugging why your API keys work locally but not in production. The source walks through the seven different .env file types and their load order, which is genuinely helpful since Next.js's precedence chain trips people up constantly. Includes validation scripts and a practical checklist for catching the classic mistake of putting secrets in NEXT_PUBLIC_ variables where they'll get baked into your browser bundle.
Install to Claude Code
npx -y skills add bobmatnyc/claude-mpm-skills --skill nextjs-v16 --agent claude-codeInstalls into .claude/skills of the current project.
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Files
SKILL.md
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Plug Mailtrap into your AI workflow and let it handle the email.
Connect Mailtrap MCP →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →Make coding agent sessions - Searchable, Shareable, Vendor-neutral & Scored.
Try For Free →Your agent targets a perfect 10 Code Health score. Deterministic. Every commit.
Try For Free →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →
