org-roam/doc/installation.md

Installation

The recommended method is using use-package and straight, or a similar package manager.

(use-package org-roam
      :after org
      :hook (org-mode . org-roam-mode)
      :straight (:host github :repo "jethrokuan/org-roam")
      :custom
      (org-roam-directory "/path/to/org-files/")
      (org-roam-link-representation 'title) ;; or keep it as 'id
      :bind
      ("C-c n l" . org-roam)      
      ("C-c n t" . org-roam-today)
      ("C-c n f" . org-roam-find-file)
      ("C-c n i" . org-roam-insert)
      ("C-c n g" . org-roam-show-graph))

If not using package.el, you can also clone it into your Emacs directory and add it to your load path:

git clone https://github.com/jethrokuan/org-roam/ ~/.emacs.d/elisp/org-roam

(add-to-list 'load-path "./elisp")
(require 'org-roam)