jotain

Modern Emacs Lisp development practices (Emacs 30/31) — coding and naming conventions, lexical binding, macro hygiene, hooks vs. advice, defcustom/setopt, use-package patterns, modern libraries (pcase/seq/map/cl-lib/rx), debugging, and ERT testing. Use when writing or reviewing any Elisp in this repo (lisp/init-*.el, early-init.el, init.el, test/).

Knowledge base on GNU Emacs internals (Emacs 30/31) — garbage collection, object representation, buffers and text, the redisplay engine, the command loop and keymaps, byte/native compilation, threads, and the build/dump pipeline. Use when explaining or debugging core Emacs behavior, tuning performance (GC, redisplay, startup), reasoning about native-comp/eln caches, or reviewing Elisp whose correctness depends on runtime semantics.