diff --git a/packages/pi-coding-agent/src/modes/interactive/components/extension-input.ts b/packages/pi-coding-agent/src/modes/interactive/components/extension-input.ts
index 525bcfc06..7634d154f 100644
--- a/packages/pi-coding-agent/src/modes/interactive/components/extension-input.ts
+++ b/packages/pi-coding-agent/src/modes/interactive/components/extension-input.ts
@@ -11,6 +11,7 @@ import { keyHint } from "./keybinding-hints.js";
 export interface ExtensionInputOptions {
 	tui?: TUI;
 	timeout?: number;
+	secure?: boolean;
 }
 
 export class ExtensionInputComponent extends Container implements Focusable {
@@ -61,6 +62,7 @@ export class ExtensionInputComponent extends Container implements Focusable {
 		}
 
 		this.input = new Input();
+		this.input.secure = opts?.secure === true;
 		if (placeholder) {
 			this.input.placeholder = placeholder;
 		}
diff --git a/packages/pi-coding-agent/src/modes/interactive/interactive-mode.ts b/packages/pi-coding-agent/src/modes/interactive/interactive-mode.ts
index 85ba64d39..eb062ca41 100644
--- a/packages/pi-coding-agent/src/modes/interactive/interactive-mode.ts
+++ b/packages/pi-coding-agent/src/modes/interactive/interactive-mode.ts
@@ -1631,7 +1631,7 @@ export class InteractiveMode {
 					this.hideExtensionInput();
 					resolve(undefined);
 				},
-				{ tui: this.ui, timeout: opts?.timeout },
+				{ tui: this.ui, timeout: opts?.timeout, secure: opts?.secure },
 			);
 
 			this.editorContainer.clear();
diff --git a/packages/pi-tui/src/components/__tests__/input.test.ts b/packages/pi-tui/src/components/__tests__/input.test.ts
index c47100492..581c2e14f 100644
--- a/packages/pi-tui/src/components/__tests__/input.test.ts
+++ b/packages/pi-tui/src/components/__tests__/input.test.ts
@@ -32,4 +32,15 @@ describe("Input", () => {
 		input.focused = false;
 		assert.equal(input.focused, false);
 	});
+
+	it("secure mode obscures typed characters in render output", () => {
+		const input = new Input();
+		input.secure = true;
+		input.focused = true;
+		input.handleInput("secret123");
+
+		const line = input.render(40)[0] ?? "";
+		assert.ok(!line.includes("secret123"), "rendered line must not expose raw secret text");
+		assert.ok(line.includes("*********"), "rendered line should include masked characters");
+	});
 });
diff --git a/packages/pi-tui/src/components/input.ts b/packages/pi-tui/src/components/input.ts
index 627f3557c..78535ab3f 100644
--- a/packages/pi-tui/src/components/input.ts
+++ b/packages/pi-tui/src/components/input.ts
@@ -21,6 +21,8 @@ export class Input implements Component, Focusable {
 	public onSubmit?: (value: string) => void;
 	public onEscape?: () => void;
 	public placeholder: string = "";
+	/** When true, render obscured characters instead of the actual value. */
+	public secure: boolean = false;
 
 	/** Focusable interface - set by TUI when focus changes */
 	private _focused: boolean = false;
@@ -446,6 +448,7 @@ export class Input implements Component, Focusable {
 		// Calculate visible window
 		const prompt = "> ";
 		const availableWidth = width - prompt.length;
+		const renderValue = this.secure ? "*".repeat(this.value.length) : this.value;
 
 		if (availableWidth <= 0) {
 			return [prompt];
@@ -466,7 +469,7 @@ export class Input implements Component, Focusable {
 
 		if (this.value.length < availableWidth) {
 			// Everything fits (leave room for cursor at end)
-			visibleText = this.value;
+			visibleText = renderValue;
 		} else {
 			// Need horizontal scrolling
 			// Reserve one character for cursor if it's at the end
@@ -501,17 +504,17 @@ export class Input implements Component, Focusable {
 
 			if (this.cursor < halfWidth) {
 				// Cursor near start
-				visibleText = this.value.slice(0, findValidEnd(scrollWidth));
+				visibleText = renderValue.slice(0, findValidEnd(scrollWidth));
 				cursorDisplay = this.cursor;
 			} else if (this.cursor > this.value.length - halfWidth) {
 				// Cursor near end
 				const start = findValidStart(this.value.length - scrollWidth);
-				visibleText = this.value.slice(start);
+				visibleText = renderValue.slice(start);
 				cursorDisplay = this.cursor - start;
 			} else {
 				// Cursor in middle
 				const start = findValidStart(this.cursor - halfWidth);
-				visibleText = this.value.slice(start, findValidEnd(start + scrollWidth));
+				visibleText = renderValue.slice(start, findValidEnd(start + scrollWidth));
 				cursorDisplay = halfWidth;
 			}
 		}