diff --git a/packages/kilo-vscode/webview-ui/agent-manager/AgentManagerApp.tsx b/packages/kilo-vscode/webview-ui/agent-manager/AgentManagerApp.tsx
index a89556074f9..c87d7ced5ee 100644
--- a/packages/kilo-vscode/webview-ui/agent-manager/AgentManagerApp.tsx
+++ b/packages/kilo-vscode/webview-ui/agent-manager/AgentManagerApp.tsx
@@ -1546,13 +1546,13 @@ const NewWorktreeDialog: Component<{ onClose: () => void }> = (props) => {
   return (
     <Dialog title="New Worktree" fit>
       <div class="am-nv-dialog" onKeyDown={handleKeyDown}>
-        {/* Prompt input — reuses the same CSS as the sidebar chat input */}
-        <div class="am-prompt-input-container">
-          <div class="am-prompt-input-wrapper">
-            <div class="am-prompt-input-ghost-wrapper">
+        {/* Prompt input — reuses the sidebar chat-input base classes for consistent styling */}
+        <div class="prompt-input-container am-prompt-input-container">
+          <div class="prompt-input-wrapper am-prompt-input-wrapper">
+            <div class="prompt-input-ghost-wrapper am-prompt-input-ghost-wrapper">
               <textarea
                 ref={textareaRef}
-                class="am-prompt-input"
+                class="prompt-input am-prompt-input"
                 placeholder={`Type a message (${isMac ? "\u2318" : "Ctrl+"}Enter to send)`}
                 value={prompt()}
                 onInput={(e) => {
diff --git a/packages/kilo-vscode/webview-ui/agent-manager/agent-manager.css b/packages/kilo-vscode/webview-ui/agent-manager/agent-manager.css
index 037e5b0be06..a484ef8b045 100644
--- a/packages/kilo-vscode/webview-ui/agent-manager/agent-manager.css
+++ b/packages/kilo-vscode/webview-ui/agent-manager/agent-manager.css
@@ -763,7 +763,7 @@ button.am-section-toggle:hover .am-section-label {
   min-width: 460px;
 }
 
-/* Reuse am-prompt-input-container inside dialog — resizable from bottom edge */
+/* Dialog overrides for prompt-input-container — resizable from bottom edge */
 .am-nv-dialog .am-prompt-input-container {
   margin: 0;
   resize: vertical;
@@ -786,6 +786,7 @@ button.am-section-toggle:hover .am-section-label {
 .am-nv-dialog .am-prompt-input {
   color: var(--vscode-input-foreground, var(--text-base));
   resize: none;
+  width: 100%;
   min-height: 100%;
   max-height: none;
 }