diff --git a/packages/coding-agent/src/tui/custom-editor.ts b/packages/coding-agent/src/tui/custom-editor.ts
index b89a64d5..08527dff 100644
--- a/packages/coding-agent/src/tui/custom-editor.ts
+++ b/packages/coding-agent/src/tui/custom-editor.ts
@@ -6,12 +6,12 @@ import { Editor } from "@mariozechner/pi-tui";
 export class CustomEditor extends Editor {
 	public onEscape?: () => void;
 	public onCtrlC?: () => void;
-	public onCtrlT?: () => void;
+	public onShiftTab?: () => void;
 
 	handleInput(data: string): void {
-		// Intercept Ctrl+T for thinking level cycling
-		if (data === "\x14" && this.onCtrlT) {
-			this.onCtrlT();
+		// Intercept Shift+Tab for thinking level cycling
+		if (data === "\x1b[Z" && this.onShiftTab) {
+			this.onShiftTab();
 			return;
 		}
 
diff --git a/packages/coding-agent/src/tui/tui-renderer.ts b/packages/coding-agent/src/tui/tui-renderer.ts
index 01713d24..e9fcf847 100644
--- a/packages/coding-agent/src/tui/tui-renderer.ts
+++ b/packages/coding-agent/src/tui/tui-renderer.ts
@@ -169,7 +169,7 @@ export class TuiRenderer {
 			chalk.dim("ctrl+k") +
 			chalk.gray(" to delete line") +
 			"\n" +
-			chalk.dim("ctrl+t") +
+			chalk.dim("shift+tab") +
 			chalk.gray(" to cycle thinking") +
 			"\n" +
 			chalk.dim("/") +
@@ -213,7 +213,7 @@ export class TuiRenderer {
 			this.handleCtrlC();
 		};
 
-		this.editor.onCtrlT = () => {
+		this.editor.onShiftTab = () => {
 			this.cycleThinkingLevel();
 		};