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Middleware Patterns

Category: Security  ·  Sub-category: security-misc  ·  Last updated:
type:review
Use when designing or reviewing Next.js middleware (`middleware.ts`): cross-cutting request/response transforms before route resolution, Edge Runtime constraints, `matcher` config, `NextRequest`/`NextResponse` API, the four response shapes (next/rewrite/redirect/direct), canonical patterns (auth gate, locale routing, A/B testing, header injection, geo-routing, bot blocking), and the design rule that middleware is for cross-cutting concerns across many routes — never per-route business logic. Do NOT use for per-route HTTP endpoint logic (use route-handler-design), Server Action mutations (use server-actions-design), abstract HTTP semantics (use http-semantics), CSP and hardening (use security-fundamentals), or the cross-cutting streaming model (use streaming-architecture).

What this skill does

Middleware Patterns is a community-contributed Claude Code skill in the security-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/middleware-patterns/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when designing or reviewing Next.js middleware (`middleware.

Who uses this skill

The Middleware Patterns Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 69,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/middleware-patterns
curl -L https://claudskills.com/skills/middleware-patterns/SKILL.md \
  -o ~/.claude/skills/middleware-patterns/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/middleware-patterns/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/middleware-patterns/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\middleware-patterns\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Attribution & license

More Security skills

Browse all Security skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Security skills → Top 100 skills
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