Aspects of the present invention include a method which includes a processor providing a debug extension library; providing a common debug interface and at least two common debug interface implementations, a first one of the common debug interface implementations being dedicated to a native debugger of an interpreted language computer program, a second one of the common debug interface implementations being dedicated to a native debugger of a compiled language computer program, wherein an application contains a first portion written in an interpreted programming language and a second portion written in a compiled programming language; and responding to a user command provided through a debug script program to debug the application by commanding one of the native debugger of an interpreted language computer program or the native debugger of a compiled language computer program through the corresponding dedicated common debug interface implementation.