diff --git a/packages/coding-agent/src/extensibility/legacy-pi-tui-shim.ts b/packages/coding-agent/src/extensibility/legacy-pi-tui-shim.ts
index 7b448933a..870de8c76 100644
--- a/packages/coding-agent/src/extensibility/legacy-pi-tui-shim.ts
+++ b/packages/coding-agent/src/extensibility/legacy-pi-tui-shim.ts
@@ -6,13 +6,10 @@
  * exposes the equivalent, broader `decodePrintableKey` helper. Keep the legacy
  * name available without reintroducing it into the canonical package surface.
  */
-import { ImageProtocol, isInsideTmux, TERMINAL, wrapTmuxPassthrough } from "@oh-my-pi/pi-tui";
+import { ImageProtocol, TERMINAL } from "@oh-my-pi/pi-tui";
 
 export * from "@oh-my-pi/pi-tui";
-export {
-	decodePrintableKey as decodeKittyPrintable,
-	encodeKittyDeleteImage as deleteKittyImage,
-} from "@oh-my-pi/pi-tui";
+export { decodePrintableKey as decodeKittyPrintable } from "@oh-my-pi/pi-tui";
 
 /** Report canonical terminal capabilities through the legacy Pi TUI shape. */
 export function getCapabilities(): {
@@ -29,8 +26,18 @@ export function getCapabilities(): {
 	return { images, trueColor: TERMINAL.trueColor, hyperlinks: TERMINAL.hyperlinks };
 }
 
-/** Delete every Kitty graphics image using the legacy Pi TUI control sequence. */
-export function deleteAllKittyImages(): string {
-	const sequence = "\x1b_Ga=d,d=A,q=2\x1b\\";
-	return isInsideTmux() ? wrapTmuxPassthrough(sequence) : sequence;
+/**
+ * Delete one Kitty graphics image by id, matching the legacy Pi TUI helper.
+ *
+ * Returns the bare control sequence exactly like upstream Pi: legacy callers
+ * (e.g. pi-sprite) apply their own tmux passthrough wrapping, so wrapping here
+ * would double-wrap under tmux and the outer terminal would drop the command.
+ */
+export function deleteKittyImage(imageId: number): string {
+	return `\x1b_Ga=d,d=I,i=${imageId},q=2\x1b\\`;
+}
+
+/** Delete every Kitty graphics image using the legacy Pi TUI bare sequence. */
+export function deleteAllKittyImages(): string {
+	return "\x1b_Ga=d,d=A,q=2\x1b\\";
 }
diff --git a/packages/coding-agent/test/extensibility/legacy-pi-ai-type-remap.test.ts b/packages/coding-agent/test/extensibility/legacy-pi-ai-type-remap.test.ts
index 90ebf4d6b..4eb64ddbd 100644
--- a/packages/coding-agent/test/extensibility/legacy-pi-ai-type-remap.test.ts
+++ b/packages/coding-agent/test/extensibility/legacy-pi-ai-type-remap.test.ts
@@ -280,8 +280,10 @@ describe("legacy pi package root remaps (issue #1474)", () => {
 			deleteAll: string;
 			capabilities: { images: "kitty" | "iterm2" | null; trueColor: boolean; hyperlinks: boolean };
 		};
-		expect(loaded.deleteOne).toContain("a=d,d=I,i=42,q=2");
-		expect(loaded.deleteAll).toContain("a=d,d=A,q=2");
+		// Bare sequences, exactly like upstream Pi: legacy callers (pi-sprite)
+		// apply their own tmux passthrough wrapping.
+		expect(loaded.deleteOne).toBe("\x1b_Ga=d,d=I,i=42,q=2\x1b\\");
+		expect(loaded.deleteAll).toBe("\x1b_Ga=d,d=A,q=2\x1b\\");
 		expect(["kitty", "iterm2", null]).toContain(loaded.capabilities.images);
 		expect(typeof loaded.capabilities.trueColor).toBe("boolean");
 		expect(typeof loaded.capabilities.hyperlinks).toBe("boolean");