鬼脑(Ghost Brain) is an experimental symbolic computing platform under the ELSA Systems project.

The project investigates technologies including Lisp Machines, homoiconic programming languages, graph-based computation, reflective runtime systems, persistent object environments, and AI-native architectures. It is intended as a playground for experimenting with new paradigms that may influence future generations of ELSA Systems.

Unlike Chicken George Linux, which is designed as a minimal GNU/POSIX-compatible operating system for production use, Ghost Brain is an exploratory research project. The two systems are developed in parallel under the ELSA Systems umbrella: Chicken George focuses on practical engineering, while Ghost Brain explores what computing could become if designed from first principles.