diff --git a/emacs/init.el b/emacs/init.el
index 2a1e0e2..f082d5c 100644
--- a/emacs/init.el
+++ b/emacs/init.el
@@ -1046,7 +1046,40 @@ any directory proffered by `consult-dir'."
            (eshell/cd (substring-no-properties
                        (consult-dir--pick "Switch directory: ")))))
         (t (eshell/cd (if regexp (eshell-find-previous-directory regexp)
-                        (completing-read "cd: " eshell-dirs))))))))
+                        (completing-read "cd: " eshell-dirs)))))))
+
+  (defun eshell/mkenv (&rest args)
+   "Initialize a devenv environment or configure its .envrc.
+
+With optional argument --here or -h, forces execution in the
+current directory instead of the project root."
+   (interactive)
+   (let* ((here-flag (or (member "--here" args) (member "-h" args)))
+          (project-root
+           ;; Use Projectile to find the root if available, otherwise fallback to git.
+           (cond
+            ((fboundp 'project-root) (project-root (project-current)))
+            ((shell-command-to-string "git rev-parse --is-inside-work-tree")
+             (string-trim (shell-command-to-string "git rev-parse --show-toplevel")))))
+          (target-dir
+           (if (or here-flag (not project-root))
+               default-directory
+             project-root))
+          ;; Localize all file operations to the target directory
+          (default-directory target-dir))
+
+     (if (not (file-exists-p "devenv.nix"))
+         ;; If it doesn't exist, we assume this is a new project.
+         (call-process "devenv" nil 0 nil "init"))
+
+     (when (not (file-exists-p ".envrc"))
+       ;; If .envrc is missing, create and configure it for devenv.
+       (with-temp-file ".envrc"
+         (insert "eval \"$(devenv direnvrc)\"")))
+
+     (if (file-exists-p "devenv.nix")
+         (find-file (expand-file-name "devenv.nix" target-dir))
+       (message "Could not open devenv.nix as it was not created.")))))
 
 (use-package eshell
   :bind (:map eshell-hist-mode-map
diff --git a/gitignore-global b/gitignore-global
index da1a531..d87e527 100644
--- a/gitignore-global
+++ b/gitignore-global
@@ -18,4 +18,11 @@ compile_commands.json
 .ipynb_checkpoints
 infer-out
 .cache
-.aider*
\ No newline at end of file
+.aider*
+
+# Devenv
+.devenv*
+devenv.local.nix
+
+# pre-commit
+.pre-commit-config.yaml
diff --git a/nix/home.nix b/nix/home.nix
index c9dc4fe..70e5358 100644
--- a/nix/home.nix
+++ b/nix/home.nix
@@ -28,6 +28,7 @@
     aider-chat
     sops
     just
+    devenv
   ];
 
   imports = [
diff --git a/nix/modules/fish/default.nix b/nix/modules/fish/default.nix
index e63b198..daa2b3f 100644
--- a/nix/modules/fish/default.nix
+++ b/nix/modules/fish/default.nix
@@ -42,7 +42,7 @@ let tide_conf = builtins.readFile ./tide_config.fish; in
 
     shellInit = ''
       set --universal fish_greeting
-      set -g -x EDITOR "vim"
+      set -g -x EDITOR "emacsclient -a \"emacs -nw\""
       set -g -x ALTERNATE_EDITOR "vim"
       set -g -x TERMINAL "kitty"
       set -g -x LESS "--ignore-case --QUIET --RAW-CONTROL-CHARS"
@@ -61,6 +61,40 @@ let tide_conf = builtins.readFile ./tide_config.fish; in
         command ssh $argv
       end
 
+      function mkenv --description "Initialize a devenv environment or configure its .envrc"
+          argparse --name=mkenv h/here -- $argv
+          or return 1 # Exit if parsing fails
+
+          # Default target directory is the current directory.
+          set -l target_dir "."
+
+          # Check if we are inside a Git repository's working tree.
+          if git rev-parse --is-inside-work-tree >/dev/null 2>&1
+              if not set -q _flag_here; and not test -f devenv.nix
+                  set target_dir (git rev-parse --show-toplevel)
+              end
+          end
+
+          pushd "$target_dir"
+
+          # Check for the existence of the primary devenv configuration file.
+          if not test -f "devenv.nix"
+              devenv init
+          else
+              # If devenv.nix exists, check for the direnv configuration file.
+              if not test -f ".envrc"
+                  echo 'eval "$(devenv direnvrc)"' > .envrc
+                  direnv allow
+              end
+          end
+
+          if test -f "devenv.nix"
+              emacsclient devenv.nix
+          else
+              echo -e "\e[31mCould not open devenv.nix as it was not created.\e[0m"
+          end
+      end
+
       if test -f $HOME/.cargo/env.fish
         source "$HOME/.cargo/env.fish"
       end
@@ -73,10 +107,8 @@ let tide_conf = builtins.readFile ./tide_config.fish; in
       '';
 
     shellAliases = {
-      ec = "emacsclient -n --alternate-editor=emacs";
+      ec = "emacsclient -n --alternate-editor=\"emacs -nw\"";
       pubip = "curl icanhazip.com";
-      redesktop = "kquitapp5 plasmashell && kstart5 plasmashell";
-      pulsefix = "pulseaudio --kill; pulseaudio --start";
     };
   };
 }