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Some implementations of Hemlock feature the ability to manage multiple slave Lisps, each connected to one editor Lisp. The routines discussed here spawn slaves, send evaluation and compilation requests, return the current server, etc. This is very powerful because without it you can lose your editing state when code you are developing causes a fatal error in Lisp.
The routines described in this section are best suited for creating editor commands that interact with slave Lisps, but in the past users implemented several independent Lisps as nodes communicating via these functions. There is a better level on which to write such code that avoids the extra effort these routines take for the editor’s sake. See the CMU Common Lisp User’s Manual for the remote and wire packages.