Layers of Confluence

This artifact is a companion to the CPP'26 submission titled: "Layers of Confluence for Actors".

We formalise Endrullis and Klop's modern account of De Bruijn's original proof of the weak diamond property.
We use it to formally prove the confluence of a class of initial configurations in a toy calculus with actors.
We show how to inhabit this class of programs with concrete example using a simple but illustrative static analysis.