Automatically updating documentation

A method comprises executing a code in a development environment for: documenting versions of source files of a software program in a plurality of source documentation objects, where at least one of the source documentation objects comprises a textual description comprising one or more text-extracts, each text-extract comprising at least one marked token extracted from one of the versions of the source files; accessing a new version of a source file; performing an identification of when at least one updated token in the new version is different from the marked token; and in response to the identification: classifying the updated token according to differences identified between the updated token and the marked token; and subject to the classification being a member of a set of updatable changes, generating an updated source documentation object by modifying the text-extract in the textual description according to the classification and the differences.