MCP Patterns

Local-first guidance for building MCP servers without turning the protocol surface into a bag of random decorators.

When to activate

• Building a new local MCP server, mainly in Python
• Refactoring an MCP server that mixed protocol glue with business logic
• Deciding whether a feature should be a tool, resource, prompt, root-aware flow, or sampling-assisted path
• Wiring a server into Claude Desktop or another local MCP host
• Debugging transport, lifecycle, capability, or host-integration issues
• Preparing a local server for packaging or distribution

Outcome expectations