Lessons Learned from Building an MCP Client

1

picocli

My programming language of choice for this project was Java. While most online tutorials focus on JavaScript or Python, I wanted to approach this task differently. Java might not be the trendiest option, and it is certainly not always the most recommended choice for a CLI application, but it is not an inherently worse one. Several libraries, such as picocli and jline3, are aimed at helping with the development of text-based CLI applications. Additionally, LangChain4J provides an implementation for many MCP features, although it is still in an experimental phase.

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GitHub MCP Server

Definition of each available tool with a description of what it does, description of each argument, and other relevant information. As an example, this is a snippet that will be sent to the model in case we are using GitHub's MCP server. Emphasis on the part that this is a snippet; the tool definition goes on and on.

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