Jean-Baptiste Dalle developed a Workflow Trigger Validation System for the elsa-core repository, focusing on improving the reliability of workflow scheduling and HTTP endpoint triggers. He implemented payload validation, refactored the existing HttpEndpoint validator, and introduced a Cron expression validator to ensure trigger configurations are correct before workflows are published. By gating workflow publication on valid triggers, he reduced the risk of misconfigurations reaching production. His work leveraged C# and emphasized backend development, API design, and workflow orchestration. Over the course of the month, Jean-Baptiste delivered a well-structured feature that enhanced both the maintainability and robustness of trigger handling.