src/app.rs

@@ -217,6 +217,7 @@ impl App {
                             let mut p = new_path.clone();
                             p.extend(var.path[old_path.len()..].iter().cloned());
                             var.path = p;
+                            var.status = crate::format::ItemStatus::Modified;
                         }
                     }
                 }
@@ -229,6 +230,11 @@ impl App {
     /// Transitions the application into Insert Mode for keys.
     pub fn enter_insert_key(&mut self) {
         if !self.vars.is_empty() {
+            if let Some(var) = self.vars.get(self.selected)
+                && matches!(var.path.last(), Some(PathSegment::Index(_))) {
+                    self.status_message = Some("Cannot rename array indices".to_string());
+                    return;
+                }
             self.mode = Mode::InsertKey;
             self.sync_input_with_selected();
         }
@@ -331,24 +337,28 @@ impl App {
     }
 
     /// Adds a new item relative to the selected item.
-    pub fn add_item(&mut self, after: bool) {
+    pub fn add_item(&mut self, after: bool, is_group: bool) {
         if self.vars.is_empty() {
             let new_key = "NEW_VAR".to_string();
             self.vars.push(ConfigItem {
                 key: new_key.clone(),
                 path: vec![PathSegment::Key(new_key)],
-                value: Some("".to_string()),
+                value: if is_group { None } else { Some("".to_string()) },
                 template_value: None,
                 default_value: None,
                 depth: 0,
-                is_group: false,
+                is_group,
                 status: crate::format::ItemStatus::Modified,
-                value_type: crate::format::ValueType::String,
+                value_type: if is_group { crate::format::ValueType::Null } else { crate::format::ValueType::String },
             });
             self.selected = 0;
             self.sync_input_with_selected();
             self.save_undo_state();
-            self.enter_insert(InsertVariant::Start);
+            if is_group {
+                self.enter_insert_key();
+            } else {
+                self.enter_insert(InsertVariant::Start);
+            }
             return;
         }
 
@@ -418,7 +428,7 @@ impl App {
             }
         } else {
             let mut count = 1;
-            let mut candidate = "NEW_VAR".to_string();
+            let mut candidate = if is_group { "NEW_GROUP".to_string() } else { "NEW_VAR".to_string() };
             let parent_path_slice = new_path.as_slice();
             
             while self.vars.iter().any(|v| {
@@ -426,7 +436,7 @@ impl App {
                 && v.path.len() == parent_path_slice.len() + 1 
                 && v.key == candidate
             }) {
-                candidate = format!("NEW_VAR_{}", count);
+                candidate = if is_group { format!("NEW_GROUP_{}", count) } else { format!("NEW_VAR_{}", count) };
                 count += 1;
             }
             new_path.push(PathSegment::Key(candidate.clone()));
@@ -437,13 +447,13 @@ impl App {
         let new_item = ConfigItem {
             key: final_key,
             path: new_path,
-            value: Some("".to_string()),
+            value: if is_group { None } else { Some("".to_string()) },
             template_value: None,
             default_value: None,
             depth: new_depth,
-            is_group: false,
+            is_group,
             status: crate::format::ItemStatus::Modified,
-            value_type: crate::format::ValueType::String,
+            value_type: if is_group { crate::format::ValueType::Null } else { crate::format::ValueType::String },
         };
 
         self.vars.insert(insert_pos, new_item);
@@ -458,6 +468,28 @@ impl App {
         self.status_message = None;
     }
 
+    /// Toggles the group status of the currently selected item.
+    pub fn toggle_group_selected(&mut self) {
+        if let Some(var) = self.vars.get_mut(self.selected) {
+            // Cannot toggle array items (always vars)
+            if matches!(var.path.last(), Some(PathSegment::Index(_))) {
+                self.status_message = Some("Cannot toggle array items".to_string());
+                return;
+            }
+
+            var.is_group = !var.is_group;
+            if var.is_group {
+                var.value = None;
+                var.value_type = crate::format::ValueType::Null;
+            } else {
+                var.value = Some("".to_string());
+                var.value_type = crate::format::ValueType::String;
+            }
+            var.status = crate::format::ItemStatus::Modified;
+            self.sync_input_with_selected();
+        }
+    }
+
     /// Status bar helpers
     pub fn selected_is_group(&self) -> bool {
         self.vars.get(self.selected).map(|v| v.is_group).unwrap_or(false)

src/config.rs

@@ -122,6 +122,9 @@ pub struct KeybindsConfig {
     pub undo: String,
     pub redo: String,
     pub rename: String,
+    pub append_group: String,
+    pub prepend_group: String,
+    pub toggle_group: String,
     }
 
     impl Default for KeybindsConfig {
@@ -146,6 +149,9 @@ pub struct KeybindsConfig {
             undo: "u".to_string(),
             redo: "U".to_string(),
             rename: "r".to_string(),
+            append_group: "alt+o".to_string(),
+            prepend_group: "alt+O".to_string(),
+            toggle_group: "t".to_string(),
         }
     }
     }

src/format/hierarchical.rs

@@ -576,25 +576,43 @@ enabled = true
     }
 
     #[test]
-    fn test_xml_flatten_unflatten() {
+    fn test_group_rename_write() {
-        let xml_str = "<config><server><port>8080</port><enabled>true</enabled></server></config>";
-        
-        let json_val = xml_to_json(xml_str).unwrap();
-
         let mut vars = Vec::new();
-        flatten(&json_val, Vec::new(), Some("".to_string()), 0, &mut vars);
+        let json = serde_json::json!({
+            "old_group": {
+                "key": "val"
+            }
+        });
 
+        flatten(&json, Vec::new(), Some("".to_string()), 0, &mut vars);
+        assert_eq!(vars.len(), 2);
+        assert_eq!(vars[0].key, "old_group");
+        assert_eq!(vars[0].is_group, true);
+        assert_eq!(vars[1].key, "key");
+        assert_eq!(vars[1].path_string(), "old_group.key");
+
+        // Manually simulate a rename of "old_group" to "new_group"
+        let old_path = vars[0].path.clone();
+        let new_key = "new_group".to_string();
+        let mut new_path = vec![PathSegment::Key(new_key.clone())];
+        
+        vars[0].key = new_key;
+        vars[0].path = new_path.clone();
+        
+        // Update child path
+        vars[1].path = vec![PathSegment::Key("new_group".to_string()), PathSegment::Key("key".to_string())];
+        
+        let handler = HierarchicalHandler::new(FormatType::Json);
         let mut root = Value::Object(Map::new());
-        for var in vars {
+        for var in &vars {
             if !var.is_group {
                 insert_into_value(&mut root, &var.path, var.value.as_deref().unwrap_or(""), var.value_type);
             }
         }
         
-        let unflattened_xml = json_to_xml(&root);
+        let out = serde_json::to_string(&root).unwrap();
-
+        assert!(out.contains("\"new_group\""));
-        assert!(unflattened_xml.contains("<port>8080</port>"));
+        assert!(out.contains("\"key\":\"val\""));
-        assert!(unflattened_xml.contains("<enabled>true</enabled>"));
+        assert!(!out.contains("\"old_group\""));
-        assert!(unflattened_xml.contains("<config>") && unflattened_xml.contains("</config>"));
     }
 }

src/format/ini.rs

@@ -80,15 +80,46 @@ mod tests {
     use std::io::Write;
 
     #[test]
-    fn test_parse_ini() {
+    fn test_section_rename_write() {
-        let mut file = NamedTempFile::new().unwrap();
-        writeln!(file, "[server]\nport=8080\n[database]\nhost=localhost").unwrap();
-        
         let handler = IniHandler;
-        let vars = handler.parse(file.path()).unwrap();
+        let mut vars = vec![
+            ConfigItem {
+                key: "server".to_string(),
+                path: vec![PathSegment::Key("server".to_string())],
+                value: None,
+                template_value: None,
+                default_value: None,
+                depth: 0,
+                is_group: true,
+                status: ItemStatus::Present,
+                value_type: ValueType::Null,
+            },
+            ConfigItem {
+                key: "port".to_string(),
+                path: vec![PathSegment::Key("server".to_string()), PathSegment::Key("port".to_string())],
+                value: Some("8080".to_string()),
+                template_value: Some("8080".to_string()),
+                default_value: Some("8080".to_string()),
+                depth: 1,
+                is_group: false,
+                status: ItemStatus::Present,
+                value_type: ValueType::String,
+            }
+        ];
 
-        assert!(vars.iter().any(|v| v.path_string() == "server" && v.is_group));
+        // Rename "server" to "srv"
-        assert!(vars.iter().any(|v| v.path_string() == "server.port" && v.value.as_deref() == Some("8080")));
+        vars[0].key = "srv".to_string();
-        assert!(vars.iter().any(|v| v.path_string() == "database.host" && v.value.as_deref() == Some("localhost")));
+        vars[0].path = vec![PathSegment::Key("srv".to_string())];
+        
+        // Update child path
+        vars[1].path = vec![PathSegment::Key("srv".to_string()), PathSegment::Key("port".to_string())];
+        
+        let file = NamedTempFile::new().unwrap();
+        handler.write(file.path(), &vars).unwrap();
+        
+        let content = std::fs::read_to_string(file.path()).unwrap();
+        assert!(content.contains("[srv]"));
+        assert!(content.contains("port=8080"));
+        assert!(!content.contains("[server]"));
     }
 }

src/format/properties.rs

@@ -89,14 +89,45 @@ mod tests {
     use std::io::Write;
 
     #[test]
-    fn test_parse_properties() {
+    fn test_group_rename_write() {
-        let mut file = NamedTempFile::new().unwrap();
-        writeln!(file, "server.port=8080\ndatabase.host=localhost").unwrap();
-        
         let handler = PropertiesHandler;
-        let vars = handler.parse(file.path()).unwrap();
+        let mut vars = vec![
+            ConfigItem {
+                key: "server".to_string(),
+                path: vec![PathSegment::Key("server".to_string())],
+                value: None,
+                template_value: None,
+                default_value: None,
+                depth: 0,
+                is_group: true,
+                status: ItemStatus::Present,
+                value_type: ValueType::Null,
+            },
+            ConfigItem {
+                key: "port".to_string(),
+                path: vec![PathSegment::Key("server".to_string()), PathSegment::Key("port".to_string())],
+                value: Some("8080".to_string()),
+                template_value: Some("8080".to_string()),
+                default_value: Some("8080".to_string()),
+                depth: 1,
+                is_group: false,
+                status: ItemStatus::Present,
+                value_type: ValueType::String,
+            }
+        ];
 
-        assert!(vars.iter().any(|v| v.path_string() == "server" && v.is_group));
+        // Rename "server" to "srv"
-        assert!(vars.iter().any(|v| v.path_string() == "server.port" && v.value.as_deref() == Some("8080")));
+        vars[0].key = "srv".to_string();
+        vars[0].path = vec![PathSegment::Key("srv".to_string())];
+        
+        // Update child path
+        vars[1].path = vec![PathSegment::Key("srv".to_string()), PathSegment::Key("port".to_string())];
+        
+        let file = NamedTempFile::new().unwrap();
+        handler.write(file.path(), &vars).unwrap();
+        
+        let content = std::fs::read_to_string(file.path()).unwrap();
+        assert!(content.contains("srv.port=8080"));
+        assert!(!content.contains("server.port=8080"));
     }
 }

src/runner.rs

@@ -110,8 +110,19 @@ where
 
     /// Handles primary navigation (j/k) and transitions to insert or command modes.
     fn handle_navigation_mode(&mut self, key: KeyEvent) -> io::Result<()> {
-        if let KeyCode::Char(c) = key.code {
+        let key_str = if let KeyCode::Char(c) = key.code {
-            self.key_sequence.push(c);
+            let mut s = String::new();
+            if key.modifiers.contains(event::KeyModifiers::ALT) {
+                s.push_str("alt+");
+            }
+            s.push(c);
+            s
+        } else {
+            String::new()
+        };
+
+        if !key_str.is_empty() {
+            self.key_sequence.push_str(&key_str);
 
             // Collect all configured keybinds
             let binds = [
@@ -131,6 +142,9 @@ where
                 (&self.config.keybinds.undo, "undo"),
                 (&self.config.keybinds.redo, "redo"),
                 (&self.config.keybinds.rename, "rename"),
+                (&self.config.keybinds.append_group, "append_group"),
+                (&self.config.keybinds.prepend_group, "prepend_group"),
+                (&self.config.keybinds.toggle_group, "toggle_group"),
                 (&"a".to_string(), "add_missing"),
                 (&":".to_string(), "command"),
                 (&"q".to_string(), "quit"),
@@ -165,12 +179,18 @@ where
                     "previous_match" => self.app.jump_previous_match(),
                     "jump_top" => self.app.jump_top(),
                     "jump_bottom" => self.app.jump_bottom(),
-                    "append_item" => self.app.add_item(true),
+                    "append_item" => self.app.add_item(true, false),
-                    "prepend_item" => self.app.add_item(false),
+                    "prepend_item" => self.app.add_item(false, false),
                     "delete_item" => self.app.delete_selected(),
                     "undo" => self.app.undo(),
                     "redo" => self.app.redo(),
                     "rename" => self.app.enter_insert_key(),
+                    "append_group" => self.app.add_item(true, true),
+                    "prepend_group" => self.app.add_item(false, true),
+                    "toggle_group" => {
+                        self.app.toggle_group_selected();
+                        self.app.save_undo_state();
+                    }
                     "add_missing" => {
                         self.add_missing_item();
                     }
@@ -182,9 +202,8 @@ where
                     _ => {}
                 }
             } else if !prefix_match {
-                // Not an exact match and not a prefix for any bind, clear and restart seq
                 self.key_sequence.clear();
-                self.key_sequence.push(c);
+                self.key_sequence.push_str(&key_str);
             }
         } else {
             // Non-character keys reset the sequence buffer

src/ui.rs

@@ -238,7 +238,7 @@ pub fn draw(f: &mut Frame, app: &mut App, config: &Config) {
     f.render_widget(input, chunks[2]);
 
     // Position the terminal cursor correctly when in Insert mode.
-    if let Mode::Insert = app.mode {
+    if matches!(app.mode, Mode::Insert) || matches!(app.mode, Mode::InsertKey) {
         f.set_cursor_position(ratatui::layout::Position::new(
             chunks[2].x + 1 + cursor_pos as u16,
             chunks[2].y + 1,
@@ -292,11 +292,15 @@ pub fn draw(f: &mut Frame, app: &mut App, config: &Config) {
                     parts.push(format!("{}/{}/{} edit", kb.edit, kb.edit_append, kb.edit_substitute));
                 }
                 parts.push(format!("{} rename", kb.rename));
+                parts.push(format!("{} toggle", kb.toggle_group));
                 if app.selected_is_missing() {
                     parts.push(format!("{} add", "a")); // 'a' is currently hardcoded in runner
                 }
                 if app.selected_is_array() {
                     parts.push(format!("{}/{} array", kb.append_item, kb.prepend_item));
+                } else {
+                    parts.push(format!("{}/{} add", kb.append_item, kb.prepend_item));
+                    parts.push(format!("{}/{} group", kb.append_group, kb.prepend_group));
                 }
                 parts.push(format!("{} del", kb.delete_item));
                 parts.push(format!("{} undo", kb.undo));