diff --git a/packages/tui/src/components/editor.ts b/packages/tui/src/components/editor.ts
index dd6be631..73185a89 100644
--- a/packages/tui/src/components/editor.ts
+++ b/packages/tui/src/components/editor.ts
@@ -897,17 +897,21 @@ export class Editor implements Component, Focusable {
 		return this.state.lines.join("\n");
 	}
 
+	private expandPasteMarkers(text: string): string {
+		let result = text;
+		for (const [pasteId, pasteContent] of this.pastes) {
+			const markerRegex = new RegExp(`\\[paste #${pasteId}( (\\+\\d+ lines|\\d+ chars))?\\]`, "g");
+			result = result.replace(markerRegex, () => pasteContent);
+		}
+		return result;
+	}
+
 	/**
 	 * Get text with paste markers expanded to their actual content.
 	 * Use this when you need the full content (e.g., for external editor).
 	 */
 	getExpandedText(): string {
-		let result = this.state.lines.join("\n");
-		for (const [pasteId, pasteContent] of this.pastes) {
-			const markerRegex = new RegExp(`\\[paste #${pasteId}( (\\+\\d+ lines|\\d+ chars))?\\]`, "g");
-			result = result.replace(markerRegex, pasteContent);
-		}
-		return result;
+		return this.expandPasteMarkers(this.state.lines.join("\n"));
 	}
 
 	getLines(): string[] {
@@ -1152,11 +1156,7 @@ export class Editor implements Component, Focusable {
 	}
 
 	private submitValue(): void {
-		let result = this.state.lines.join("\n").trim();
-		for (const [pasteId, pasteContent] of this.pastes) {
-			const markerRegex = new RegExp(`\\[paste #${pasteId}( (\\+\\d+ lines|\\d+ chars))?\\]`, "g");
-			result = result.replace(markerRegex, pasteContent);
-		}
+		const result = this.expandPasteMarkers(this.state.lines.join("\n")).trim();
 
 		this.state = { lines: [""], cursorLine: 0, cursorCol: 0 };
 		this.pastes.clear();
diff --git a/packages/tui/test/editor.test.ts b/packages/tui/test/editor.test.ts
index 30fc3c66..600549f0 100644
--- a/packages/tui/test/editor.test.ts
+++ b/packages/tui/test/editor.test.ts
@@ -3388,5 +3388,53 @@ describe("Editor component", () => {
 				);
 			}
 		});
+
+		it("expands large pasted content literally in getExpandedText", () => {
+			const editor = new Editor(createTestTUI(), defaultEditorTheme);
+			const pastedText = [
+				"line 1",
+				"line 2",
+				"line 3",
+				"line 4",
+				"line 5",
+				"line 6",
+				"line 7",
+				"line 8",
+				"line 9",
+				"line 10",
+				"tokens $1 $2 $& $$ $` $' end",
+			].join("\n");
+
+			editor.handleInput(`\x1b[200~${pastedText}\x1b[201~`);
+
+			assert.match(editor.getText(), /\[paste #\d+ \+\d+ lines\]/);
+			assert.strictEqual(editor.getExpandedText(), pastedText);
+		});
+
+		it("submits large pasted content literally", () => {
+			const editor = new Editor(createTestTUI(), defaultEditorTheme);
+			const pastedText = [
+				"line 1",
+				"line 2",
+				"line 3",
+				"line 4",
+				"line 5",
+				"line 6",
+				"line 7",
+				"line 8",
+				"line 9",
+				"line 10",
+				"tokens $1 $2 $& $$ $` $' end",
+			].join("\n");
+			let submitted = "";
+			editor.onSubmit = (text) => {
+				submitted = text;
+			};
+
+			editor.handleInput(`\x1b[200~${pastedText}\x1b[201~`);
+			editor.handleInput("\r");
+
+			assert.strictEqual(submitted, pastedText);
+		});
 	});
 });