This tool paper presents : a methodology and a programming framework for computer-aided design of structural operational semantics for formal models. This framework includes a set of Scala libraries and a workflow to produce visual and interactive diagrams that animate and provide insights over the structure and the semantics of a given abstract model with operational rules. follows an approach in which theoretical foundations and a practical tool are built together, as an alternative to foundations-first design (“tool justifies theory”) or tool-first design (“foundations justify practice”). The advantage of is that the tool-under-development can immediately be used to automatically run numerous and sizeable examples in order to identify subtle mistakes, unexpected outcomes, and unforeseen limitations in the foundations-under-development, as early as possible. We share two success stories of methodology and framework in our own teaching and research context, where we analyse a simple while-language and a choreographic language, including their operational rules and the concurrent composition of such rules. We further discuss how others can include in their own analysis and Scala tools.
Lecture Notes in Computer Science
25th IFIP WG 6.1 International Conference, COORDINATION 2023, Held as Part of the 18th International Federated Conference on Distributed Computing Techniques, DisCoTec 2023
Centrum Wiskunde & Informatica, Amsterdam (CWI), The Netherlands

Proença, J.M.P, & Edixhoven, L.J. (2023). Caos: A reusable scala web animator of operational semantics. In Proceedings of the 25th IFIP WG 6.1 International Conference, COORDINATION 2023. Coordination Models and Languages (pp. 163–171). doi:10.1007/978-3-031-35361-1_9