Alessandro Stranieri focused on improving the reliability of MCP protocol interactions in the Apicurio Registry repository by addressing a serialization issue in MCP responses. He updated the Java-based ObjectMapper configuration to ensure that null _meta fields were omitted during serialization, aligning the output with MCP TypeScript SDK validation requirements and preventing tool invocation errors. To reinforce this fix, he developed a targeted unit test that verifies null fields are excluded from the JSON output, reducing the risk of regressions. His work emphasized API development, Java, and testing, resulting in more robust tool integrations and fewer runtime errors for downstream consumers.