docs(python-mcp): update skill, instructions, agent, and plugin for MCP Python SDK v2 🤖🤖🤖 (#4737)

* docs(python-mcp-server-generator): rewrite skill for MCP Python SDK v2

- Target MCP Python SDK v2 (MCPServer) and MCP specification 2026-07-28
- Replace FastMCP imports with `from mcp.server import MCPServer`
- Rewrite the description with explicit triggers and exclusions
- Add the compatibility field (uv, Python 3.10+, npx for the Inspector)
- Add a five-step workflow checklist: create, write, test, validate, configure
- Pin the SDK with `uv add "mcp[cli]>=2,<3"` and use a flat uv app layout
- Add server and in-memory Client test templates
- Add a test-fix-retest validation loop with `uv run pytest`
- Add a Gotchas section for SDK v1 to v2 changes and deprecated features
- Move Streamable HTTP guidance to references/streamable-http.md
- Remove generic guidance that the model already knows

* docs(python-mcp-server): update instructions for MCP Python SDK v2

- Target MCP Python SDK v2 (MCPServer) and MCP specification 2026-07-28
- Replace FastMCP imports with MCPServer and mcp.server.mcpserver imports
- Move transport options from the constructor to run() and streamable_http_app()
- Use Resolve and Elicit for user input instead of ctx.elicit()
- Use ctx.notify_tools_changed() for list change notifications
- Explain ToolError and MCPError behavior for tool failures
- Mark sampling, protocol logging, and roots as deprecated
- Add transport security, CORS, and multi-worker guidance
- Add an in-memory Client test pattern
- Rewrite the text in ASD-STE100 Simplified Technical English
- Use single-quoted frontmatter values

* docs(python-mcp-expert): update agent for MCP Python SDK v2

- Target MCP Python SDK v2 (MCPServer) and MCP specification 2026-07-28
- Replace the retired GPT-4.1 model with GPT-6 Sol
- Replace FastMCP guidance with MCPServer guidance
- Add guidance for transport options, Resolve and Elicit, and notify_tools_changed()
- Explain ToolError and MCPError behavior for tool failures
- Mark sampling, protocol logging, and roots as deprecated
- Add SDK v1 to v2 migration as a supported scenario
- Rewrite the text in ASD-STE100 Simplified Technical English
- Use single-quoted frontmatter values

* chore(python-mcp-development): update plugin metadata for MCP Python SDK v2

- Remove FastMCP from the plugin description and README
- Describe the actual plugin contents: one skill and one agent
- Replace the fastmcp keyword with mcp-python-sdk
- Bump the plugin version to 2.0.0
- Regenerate marketplace.json and docs/README.plugins.md

* fix(python-mcp-server-generator): correct transport security, lifespan, and SSE notes

* fix(python-mcp-server): remove invalid structured_output advice and align with skill

* fix(python-mcp-expert): add missing SDK v2 rules and remove repeated guidance

* fix(python-mcp-expert): remove the retired model from frontmatter

* fix(python-mcp-server-generator): state Node.js as the MCP Inspector prerequisite

docs/README.plugins.md

@@ -99,7 +99,7 @@ See [CONTRIBUTING.md](../CONTRIBUTING.md#adding-plugins) for guidelines on how t
 | [pr-artifact-explorer](../plugins/pr-artifact-explorer/README.md) | Navigate pull requests and securely explore GitHub Actions artifacts, including test results, static sites, terminal recordings, and source files. | 1 items | actions-artifacts, artifact-browser, canvas, copilot-extension, github-actions, pull-requests, test-results |
 | [project-documenter](../plugins/project-documenter/README.md) | Generate professional project documentation with draw.io architecture diagrams and Word (.docx) output with embedded images. Automatically discovers any project's technology stack and produces Markdown, diagrams, PNG exports, and a formatted Word document. | 3 items | documentation, architecture-diagrams, drawio, word-document, docx, png-images, c4-model, project-summary, auto-discovery |
 | [project-planning](../plugins/project-planning/README.md) | Tools and guidance for software project planning, feature breakdown, epic management, implementation planning, and task organization for development teams. | 15 items | planning, project-management, epic, feature, implementation, task, architecture, technical-spike |
-| [python-mcp-development](../plugins/python-mcp-development/README.md) | Complete toolkit for building Model Context Protocol (MCP) servers in Python using the official SDK with FastMCP. Includes instructions for best practices, a prompt for generating servers, and an expert chat mode for guidance. | 2 items | python, mcp, model-context-protocol, fastmcp, server-development |
+| [python-mcp-development](../plugins/python-mcp-development/README.md) | Build Model Context Protocol (MCP) servers in Python with the official MCP Python SDK v2 (MCPServer). Includes a skill that generates a server project and an expert agent for guidance. | 2 items | python, mcp, model-context-protocol, mcp-python-sdk, server-development |
 | [react18-upgrade](../plugins/react18-upgrade/README.md) | Enterprise React 18 migration toolkit with specialized agents and skills for upgrading React 16/17 class-component codebases to React 18.3.1. Includes auditor, dependency surgeon, class component migration specialist, automatic batching fixer, and test guardian. | 13 items | react18, react, migration, upgrade, class-components, lifecycle, batching |
 | [react19-upgrade](../plugins/react19-upgrade/README.md) | Enterprise React 19 migration toolkit with specialized agents and skills for upgrading React 18 codebases to React 19. Includes auditor, dependency surgeon, source code migrator, and test guardian. Handles removal of deprecated APIs including ReactDOM.render, forwardRef, defaultProps, legacy context, string refs, and more. | 8 items | react19, react, migration, upgrade, hooks, modern-react |
 | [release-notes-showcase](../plugins/release-notes-showcase/README.md) | Compose and refine launch-ready release notes with contributor callouts and export-friendly output. | 1 items | changelog, contributor-callouts, email-export, launch-summary, product-updates, release-notes |