Reusable JSP code snippets are defined and instrumented for Website testing and production. A user may define tile definitions in a markup language file for a number of JSP code snippets to be included in a store page. Upon receiving store inputs comprising tile definitions and jar files for the features, tables may be generated that map features to stores and features dependencies to features. Based on the tables, the store inputs may be validated. If no error occurs, run time files may be generated and JSP code snippets may be instrumented to the appropriate location for Website testing and production.