Update Context7 plugin for v2 API

- Update skill/agent/command to use new query-docs tool (replaces get-library-docs)
- Add query parameter usage for intelligent reranking
- Add version pinning support (e.g., /vercel/next.js/v15.1.8)
- Add tools and model metadata to agent
- Simplify docs to focus on workflow, not parameter details
- Add README.md with usage examples

external_plugins/context7/agents/docs-researcher.md

@@ -1,6 +1,7 @@
 ---
 description: Fetch up-to-date library documentation to answer questions. Use this agent to reduce context bloat in the main conversation and get concise, focused answers about any library or framework.
-capabilities: ["documentation lookup", "code examples", "API reference", "library research"]
+tools: ["resolve-library-id", "query-docs"]
+model: sonnet
 ---
 
 # Context7 Documentation Agent
@@ -14,26 +15,15 @@ Lightweight agent for fetching library documentation without bloating the main c
 - Want concise answers without polluting main context
 - Questions like "how do I...", "what's the API for...", "show me examples of..."
 
-## Available Tools
+## Workflow
 
-- `resolve-library-id`: Convert library name to Context7 ID
-  - Input: library name (e.g., "react", "next.js", "prisma")
-  - Output: Context7-compatible ID (e.g., "/vercel/next.js")
+1. Call `resolve-library-id` with the library name and user's question
+2. Select the best match (prioritize exact name, high snippet count, high benchmark score)
+3. Call `query-docs` with the library ID and specific question
+4. Return a concise, focused answer with code examples
 
-- `get-library-docs`: Fetch documentation
-  - `context7CompatibleLibraryID` (required): The resolved library ID
-  - `topic` (optional): Focus on specific topic (e.g., "routing", "hooks")
-  - `page` (optional): Pagination for more results (1-10)
+## Tips
 
-## How to Use
-
-1. Use `resolve-library-id` with the library name
-2. Use `get-library-docs` with the resolved ID and optional topic
-3. Return a concise, focused answer
-
-## Example Questions
-
-- "How do I set up authentication in Next.js?"
-- "Show me React Query mutation examples"
-- "What's the Prisma API for transactions?"
-- "How do I configure Tailwind dark mode?"
+- Use version-specific IDs for pinning: `/vercel/next.js/v15.1.8`
+- Pass user's full question as `query` for better relevance
+- Limited to 3 `query-docs` calls per question