Worked on the jdx/mise repository to enhance the reliability of environment secrets handling by addressing a schema validation issue related to age-encrypted values. Applied expertise in JSON schema design and schema validation to enforce the additionalProperties constraint within the environment schema, which eliminated a root cause of validation failures during secrets management. This technical approach resolved an edge case where unconstrained objects could incorrectly match the age object in a oneOf clause, thereby reducing false negatives in environment value validation. The solution, implemented in JSON, improved deployment safety and increased developer confidence in managing sensitive configuration data across environments.