diff --git a/packages/coding-agent/CHANGELOG.md b/packages/coding-agent/CHANGELOG.md
index 4c116ea94..b910c8daa 100644
--- a/packages/coding-agent/CHANGELOG.md
+++ b/packages/coding-agent/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Fixed
+
+- Fixed provider setup sign-in URLs to attempt clipboard/OSC 52 copy and expose an Alt+C retry shortcut, so authentication is not blocked when TUI selection is unavailable ([#2908](https://github.com/can1357/oh-my-pi/issues/2908)).
+
 ## [16.0.5] - 2026-06-17
 
 ### Added
@@ -23,7 +27,6 @@
 
 ### Fixed
 
-- Fixed provider setup sign-in URLs to attempt clipboard/OSC 52 copy and expose an Alt+C retry shortcut, so authentication is not blocked when TUI selection is unavailable ([#2908](https://github.com/can1357/oh-my-pi/issues/2908)).
 - Fixed Matplotlib figure display to emit PNG output immediately when `display(fig)` is called, even if the figure is closed before the end-of-cell flush
 - Fixed persisted tool-result image payloads in `details.images` to externalize and resolve through the session blob store, so generated-image details survive resume without stale blob refs or truncation
 - Fixed duplicate Matplotlib image output by skipping the automatic end-of-request figure flush for figures that were already displayed through `display(fig)`
diff --git a/packages/coding-agent/src/modes/setup-wizard/scenes/sign-in.ts b/packages/coding-agent/src/modes/setup-wizard/scenes/sign-in.ts
index 8338c0199..c0896c4da 100644
--- a/packages/coding-agent/src/modes/setup-wizard/scenes/sign-in.ts
+++ b/packages/coding-agent/src/modes/setup-wizard/scenes/sign-in.ts
@@ -1,7 +1,14 @@
 import type { AuthStorage } from "@oh-my-pi/pi-ai";
 import { PASTE_CODE_LOGIN_PROVIDERS } from "@oh-my-pi/pi-ai";
 import type { OAuthProvider } from "@oh-my-pi/pi-ai/oauth/types";
-import { Input, matchesKey, type SgrMouseEvent, wrapTextWithAnsi } from "@oh-my-pi/pi-tui";
+import {
+	type Component,
+	type Focusable,
+	Input,
+	matchesKey,
+	type SgrMouseEvent,
+	wrapTextWithAnsi,
+} from "@oh-my-pi/pi-tui";
 import { getAgentDbPath } from "@oh-my-pi/pi-utils";
 import { copyToClipboard } from "../../../utils/clipboard";
 import { OAuthSelectorComponent } from "../../components/oauth-selector";
@@ -16,10 +23,48 @@ function loginCopyHint(): string {
 	return theme.fg("dim", "(clipboard copy attempted; Alt+C retries)");
 }
 
+class CopyablePromptInput implements Component, Focusable {
+	#input: Input;
+	#onCopy: () => void;
+
+	constructor(input: Input, onCopy: () => void) {
+		this.#input = input;
+		this.#onCopy = onCopy;
+	}
+
+	get focused(): boolean {
+		return this.#input.focused;
+	}
+
+	set focused(value: boolean) {
+		this.#input.focused = value;
+	}
+
+	setUseTerminalCursor(useTerminalCursor: boolean): void {
+		this.#input.setUseTerminalCursor(useTerminalCursor);
+	}
+
+	render(width: number): readonly string[] {
+		return this.#input.render(width);
+	}
+
+	handleInput(data: string): void {
+		if (matchesKey(data, "alt+c")) {
+			this.#onCopy();
+			return;
+		}
+		this.#input.handleInput(data);
+	}
+
+	invalidate(): void {
+		this.#input.invalidate();
+	}
+}
+
 interface PromptState {
 	message: string;
 	placeholder?: string;
-	input: Input;
+	input: CopyablePromptInput;
 }
 
 /**
@@ -211,9 +256,12 @@ export class SignInTab implements SetupTab {
 	#showPrompt(prompt: { message: string; placeholder?: string }): Promise<string> {
 		this.#resolvePrompt("");
 		const input = new Input();
+		const focusInput = new CopyablePromptInput(input, () => {
+			void this.#copyAuthUrl();
+		});
 		const pending = Promise.withResolvers<string>();
 		this.#promptResolve = pending.resolve;
-		this.#prompt = { message: prompt.message, placeholder: prompt.placeholder, input };
+		this.#prompt = { message: prompt.message, placeholder: prompt.placeholder, input: focusInput };
 		input.onSubmit = value => {
 			this.#resolvePrompt(value);
 		};
@@ -221,7 +269,7 @@ export class SignInTab implements SetupTab {
 			this.#loginAbort?.abort();
 			this.#resolvePrompt("");
 		};
-		this.host.setFocus(input);
+		this.host.setFocus(focusInput);
 		this.host.requestRender();
 		return pending.promise;
 	}
diff --git a/packages/coding-agent/test/setup-wizard-sign-in.test.ts b/packages/coding-agent/test/setup-wizard-sign-in.test.ts
index cac8440ef..3d875bf9f 100644
--- a/packages/coding-agent/test/setup-wizard-sign-in.test.ts
+++ b/packages/coding-agent/test/setup-wizard-sign-in.test.ts
@@ -5,6 +5,7 @@ import { SignInTab } from "@oh-my-pi/pi-coding-agent/modes/setup-wizard/scenes/s
 import type { SetupSceneHost } from "@oh-my-pi/pi-coding-agent/modes/setup-wizard/scenes/types";
 import { initTheme } from "@oh-my-pi/pi-coding-agent/modes/theme/theme";
 import * as clipboard from "@oh-my-pi/pi-coding-agent/utils/clipboard";
+import type { Component } from "@oh-my-pi/pi-tui";
 
 beforeAll(async () => {
 	await initTheme();
@@ -19,6 +20,7 @@ describe("SignInTab", () => {
 		const url = `https://example.com/oauth/authorize?client_id=omp&redirect_uri=http%3A%2F%2Flocalhost%3A45454%2Fcallback&state=${"a".repeat(96)}`;
 		const loginGate = Promise.withResolvers<void>();
 		const copySpy = vi.spyOn(clipboard, "copyToClipboard").mockResolvedValue(undefined);
+		let focusTarget: Component | undefined;
 		const openedUrls: string[] = [];
 
 		const authStorage = {
@@ -47,7 +49,9 @@ describe("SignInTab", () => {
 			},
 			requestRender(): void {},
 			finish(): void {},
-			setFocus(): void {},
+			setFocus(component: Component | null): void {
+				focusTarget = component ?? undefined;
+			},
 			restoreFocus(): void {},
 		} as unknown as SetupSceneHost;
 
@@ -64,7 +68,10 @@ describe("SignInTab", () => {
 			expect(compact).not.toContain("…");
 			expect(rendered.join("\n")).toContain(`\x1b]8;;${url}\x07Open login URL\x1b]8;;\x07`);
 			expect(openedUrls).toEqual([url]);
-			expect(copySpy).toHaveBeenCalledWith(url);
+			expect(focusTarget).toBeDefined();
+			focusTarget?.handleInput?.("\x1bc");
+			expect(copySpy).toHaveBeenCalledTimes(2);
+			expect(copySpy).toHaveBeenLastCalledWith(url);
 
 			// On a ~24-row terminal the wizard body ends up ~8 rows; the OSC8
 			// link, a plain URL row, and the focused input must survive that clip.