We investigate how explicit symbols, structured representations, and linguistic ideas can help capable models coordinate and continue their work. One starting point is the communication passed from one model call to another.

DiGraph begins with short symbols for concepts such as explaining an idea and illustrating a distinction. Each proposal has a definition and an example. The surrounding exchange remains readable.

Theoretical linguistics provides ideas about language that deserve careful explanation in their own right. This collection develops the questions and proposals that connect such ideas to Symbolic SI.