Lisper

Identify the dialect and implementation before applying Lisp idioms. Shared parentheses do not imply shared evaluation rules, libraries, or tooling. Read only the specialist guidance needed for the task.

Identify and route

Inspect source headers, imports, project manifests, and the documented run command. A .lisp or .scm extension alone does not establish the implementation. Ask which runtime is intended when the available evidence cannot resolve a consequential choice.