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everything-claude-code/skills/documentation-lookup/SKILL.md

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documentation-lookup Use up-to-date library and framework docs via Context7 MCP instead of training data. Activates for setup questions, API references, code examples, or when the user names a framework (e.g. React, Next.js, Prisma). ECC

Documentation Lookup (Context7)

When the user asks about libraries, frameworks, or APIs, fetch current documentation via the Context7 MCP (tools resolve-library-id and query-docs) instead of relying on training data.

When to Use This Skill

Activate when the user:

  • Asks setup or configuration questions (e.g. "How do I configure Next.js middleware?")
  • Requests code that depends on a library ("Write a Prisma query for...")
  • Needs API or reference information ("What are the Supabase auth methods?")
  • Mentions specific frameworks or libraries (React, Vue, Svelte, Express, Tailwind, Prisma, Supabase, etc.)

How to Fetch Documentation

Step 1: Resolve the Library ID

Call the resolve-library-id MCP tool with:

  • libraryName: The library or product name taken from the user's question (e.g. Next.js, Prisma, Supabase).
  • query: The user's full question. This improves relevance ranking of results.

You must obtain a Context7-compatible library ID (format /org/project or /org/project/version) before querying docs. Do not call query-docs without a valid library ID from this step.

Step 2: Select the Best Match

From the resolution results, choose one result using:

  • Name match: Prefer exact or closest match to what the user asked for.
  • Benchmark score: Higher scores indicate better documentation quality (100 is highest).
  • Source reputation: Prefer High or Medium reputation when available.
  • Version: If the user specified a version (e.g. "React 19", "Next.js 15"), prefer a version-specific library ID if listed (e.g. /org/project/v1.2.0).

Step 3: Fetch the Documentation

Call the query-docs MCP tool with:

  • libraryId: The selected Context7 library ID from Step 2 (e.g. /vercel/next.js).
  • query: The user's specific question or task. Be specific to get relevant snippets.

Limit: do not call query-docs (or resolve-library-id) more than 3 times per question. If the answer is unclear after 3 calls, use the best information you have.

Step 4: Use the Documentation

  • Answer the user's question using the fetched, current information.
  • Include relevant code examples from the docs when helpful.
  • Cite the library or version when it matters (e.g. "In Next.js 15...").

Guidelines

  • Be specific: Use the user's full question as the query where possible for better relevance.
  • Version awareness: When users mention versions, use version-specific library IDs from the resolve step when available.
  • Prefer official sources: When multiple matches exist, prefer official or primary packages over community forks.
  • No sensitive data: Do not include API keys, passwords, or other secrets in any query sent to Context7.

When to Use

Use this skill whenever the user's request depends on accurate, up-to-date behavior of a library, framework, or API. It applies across harnesses that have the Context7 MCP configured (e.g. Claude Code, Cursor, Codex with Context7).