Can you Lisp without being strapped in to the Torment Nexus Machine? As of 2026-03-12:

sort of maybe?

Every Lisp, Scheme, and Lisp-adjacent project listed is a non-toy implementation that has been at least somewhat active the past 5 or so years. At least the ones I'm aware of and can remember. Most Lisps do not have any guideline/policy/official stance on LLM contributions whatsoever. In those cases I post to their bug trackers or discussion lists to ask. Most in the unknown category are simply me waiting for a response.

Every link is either a document/issue stating the projects LLM policy, or is a link to an open issue. Roughly categorized according to how strongly for or against LLM contributions.

Strictly Against

• Fennel

Strongly Against

• Loko Scheme

Hesitantly Accepting

• Chicken Scheme
• Chibi-Scheme
• Gauche
• Cyclone Scheme

Accepting

• SBCL; LLM generated code in source tree
• Racket; LLM generated code in source tree
• Gerbil Scheme; LLM generated code likely in source tree
• Janet
• Jank

Unknown

• Clojure; probably against given Rich Hickey's Thanks AI! post but no way to definitively get an answer due to the relatively closed-off nature of contributing in the first place
• Chez Scheme; at least one maintainer/contributor is against, open issue
• Guile Scheme; likely against, but nothing officially or publicly stated, open issue
• ECL; likely against, open issue
• MIT Scheme; open issue
• Gambit; open issue
• STklos Scheme; open issue
• Bigloo; open issue
• Kawa Scheme; open issue
• ABCL; open issue
• LFE; probably accepting given the LLM-maximalism of one of the maintainers, still an open issue
• Hy; open issue