feat(readme): add Mandoline MCP server to community servers list

Add Mandoline AI evaluation framework MCP server to the community servers section.
Enables AI assistants to reflect on and continuously improve their performance.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -842,6 +842,7 @@ A growing set of community-developed and maintained servers demonstrates various
 - **[Magg: The MCP Aggregator](https://github.com/sitbon/magg)** - A meta-MCP server that acts as a universal hub, allowing LLMs to autonomously discover, install, and orchestrate multiple MCP servers - essentially giving AI assistants the power to extend their own capabilities on-demand. Includes `mbro`, a powerful CLI MCP server browser with scripting capability.
 - **[Mailchimp MCP](https://github.com/AgentX-ai/mailchimp-mcp)** - Allows AI agents to interact with the Mailchimp API (read-only)
 - **[MalwareBazaar_MCP](https://github.com/mytechnotalent/MalwareBazaar_MCP)** (by Kevin Thomas) - An AI-driven MCP server that autonomously interfaces with MalwareBazaar, delivering real-time threat intel and sample metadata for authorized cybersecurity research workflows.
+- **[Mandoline](https://github.com/mandoline-ai/mandoline-mcp-server)** - Enable AI assistants to reflect on, critique, and continuously improve their own performance using Mandoline's evaluation framework.
 - **[Matrix](https://github.com/mjknowles/matrix-mcp-server)** - Interact with a Matrix homeserver.
 - **[man-mcp-server](https://github.com/guyru/man-mcp-server)** - MCP to search and access man pages on the local machine.
 - **[MariaDB](https://github.com/abel9851/mcp-server-mariadb)** - MariaDB database integration with configurable access controls in Python.