adds command to create note

modules/fish/default.nix

@@ -54,6 +54,47 @@
       vterm_printf = ''
         printf "\e]%s\e\\" "$argv"
       '';
+      nn = ''
+        # Require a title argument
+        if test (count $argv) -lt 1
+            echo "Usage: nn \"My Note\""
+            return 1
+        end
+
+        # Join all arguments into single title (preserves spaces inside quotes)
+        set -l title $argv[1]
+
+        # Timestamp up to minutes, format: YYYY-MM-DD_HH-MM
+        set -l ts (date "+%Y%m%d%H%M")
+
+        # Normalize title: lowercase, replace spaces with hyphens, remove/replace
+        # characters unsafe for filenames (keep a-z0-9- and replace others with -)
+        set -l slug (string lower -- $title)
+        # Replace any sequence of non-alphanumeric characters with single hyphen
+        set -l slug (echo $slug | sed -E 's/[^a-z0-9]+/-/g' | sed -E 's/^-|-$//g')
+
+        # Compose filename
+        set -l filename "$ts_$slug.md"
+
+        # Directory for notes (change if you prefer another path)
+        set -l notes_dir ~/notes
+
+        # Ensure directory exists
+        test -d $notes_dir; or mkdir -p $notes_dir
+
+        # Full path
+        set -l fullpath "$notes_dir/$filename"
+
+        # If file doesn't exist, create with timestamp and title at top
+        if not test -f $fullpath
+            # Human-friendly timestamp line (no seconds)
+            set -l display_ts (date "+%Y-%m-%d %H:%M")
+            printf "---\nCREATED_AT: %s\n---\n\n# %s\n\n" "$display_ts" "$title" > $fullpath
+        end
+
+        # Open file in neovim
+        nvim $fullpath
+      '';
     };
 
     interactiveShellInit = ''