arcjet/arcjet-js/choose-protections

Claude Code and agent skill by arcjet/arcjet-js

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Choose which Arcjet rules address a security problem. Use when deciding between detectBot, shield, rate limits, detectPromptInjection, sensitiveInfo, validateEmail, filter, or Guard-only content moderation.

Install

npx vskill@latest install arcjet/arcjet-js/choose-protections

SKILL.md

Choose Arcjet protections

Load this skill when you need to pick rules. Then load @arcjet/skills#protect or @arcjet/skills#guard to implement them.

ProblemRuleWhere
Bots, scrapers, automated clientsdetectBot (allow or deny, not both)Request only
SQLi / XSS / common probesshield (mode: "LIVE")Request only
Cost / abuse quotastokenBucket, fixedWindow, slidingWindowRequest and Guard
Jailbreaks, instruction overridesdetectPromptInjection (binary; no threshold)Request and Guard
PII in text (names, addresses, gov IDs, card, email, phone, IP)sensitiveInfo / localDetectSensitiveInfo + backend: rampart()Request and Guard (server runtime)
Unsafe / abusive textmoderateContentGuard only
Signup spam, disposable emailvalidateEmail + protectSignupRequest only
VPN / Tor / country / IP listsfilterRequest only
Dangerous tool callsGuard per-tool label + rate limitsGuard only

Token bucket: variable-cost AI (requested per call). Fixed window: hard cap. Sliding window: no boundary burst. Request rate limits default to IP; set characteristics: ["userId"] for a user key. Guard rate limits always need key and bucket.

Sensitive-info rules use @arcjet/sensitive-info-rampart. Always pass backend: rampart() on the rule; Rampart entities never match without it. Rampart needs Node.js, Bun, or Deno – not Cloudflare Workers or edge runtimes.

capture() records that an action happened. It is not a protection rule.

Remote bot and filter rules can be managed with the CLI or MCP without a redeploy — load @arcjet/skills#cli or @arcjet/skills#mcp.

Claude Code / Copilot hooks are not this table. Publish a coding-agent policy via @arcjet/skills#mcp (Execute on: Tool call, Prompt, or Model switch) and install hooks from https://docs.arcjet.com/coding-agents (omit ?surface=).

Security

  • Security scanPassed, 90 of 100Pattern checks on the skill's files.
  • Model reviewPassed

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Source

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