A very preliminary version of syntax highlighting for the cognitive modeling language ACT-R. Some keywords are recognized (ISA, chunk-type) and buffer-names are treated like functions. Code folding works (thanks to the code already written for 'normal' lisp).
Files with the extension ".lisp" are recognized and highlighted accordingly.
I copied the stuff in grammars/actr.cson mostly from a github page on lisp syntax highlighting here: https://github.com/enriquefernandez/language-lisp
For proper Lisp indentation and better editing experience this package should be used in conjunction with some advanced editing tool, for example Parinfer
Edit the file grammars/actr.cson if you want to add some patterns to be highlighted or change existing ones.
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.