fix(tui): avoid duplicating quotes during autocomplete

packages/tui/src/autocomplete.ts

@@ -299,13 +299,18 @@ export class CombinedAutocompleteProvider implements AutocompleteProvider {
 		const currentLine = lines[cursorLine] || "";
 		const beforePrefix = currentLine.slice(0, cursorCol - prefix.length);
 		const afterCursor = currentLine.slice(cursorCol);
+		const isQuotedPrefix = prefix.startsWith('"') || prefix.startsWith('@"');
+		const hasLeadingQuoteAfterCursor = afterCursor.startsWith('"');
+		const hasTrailingQuoteInItem = item.value.endsWith('"');
+		const adjustedAfterCursor =
+			isQuotedPrefix && hasTrailingQuoteInItem && hasLeadingQuoteAfterCursor ? afterCursor.slice(1) : afterCursor;
 
 		// Check if we're completing a slash command (prefix starts with "/" but NOT a file path)
 		// Slash commands are at the start of the line and don't contain path separators after the first /
 		const isSlashCommand = prefix.startsWith("/") && beforePrefix.trim() === "" && !prefix.slice(1).includes("/");
 		if (isSlashCommand) {
 			// This is a command name completion
-			const newLine = `${beforePrefix}/${item.value} ${afterCursor}`;
+			const newLine = `${beforePrefix}/${item.value} ${adjustedAfterCursor}`;
 			const newLines = [...lines];
 			newLines[cursorLine] = newLine;
 
@@ -322,7 +327,7 @@ export class CombinedAutocompleteProvider implements AutocompleteProvider {
 			// Don't add space after directories so user can continue autocompleting
 			const isDirectory = item.label.endsWith("/");
 			const suffix = isDirectory ? "" : " ";
-			const newLine = `${beforePrefix + item.value}${suffix}${afterCursor}`;
+			const newLine = `${beforePrefix + item.value}${suffix}${adjustedAfterCursor}`;
 			const newLines = [...lines];
 			newLines[cursorLine] = newLine;
 
@@ -340,7 +345,7 @@ export class CombinedAutocompleteProvider implements AutocompleteProvider {
 		const textBeforeCursor = currentLine.slice(0, cursorCol);
 		if (textBeforeCursor.includes("/") && textBeforeCursor.includes(" ")) {
 			// This is likely a command argument completion
-			const newLine = beforePrefix + item.value + afterCursor;
+			const newLine = beforePrefix + item.value + adjustedAfterCursor;
 			const newLines = [...lines];
 			newLines[cursorLine] = newLine;
 
@@ -356,7 +361,7 @@ export class CombinedAutocompleteProvider implements AutocompleteProvider {
 		}
 
 		// For file paths, complete the path
-		const newLine = beforePrefix + item.value + afterCursor;
+		const newLine = beforePrefix + item.value + adjustedAfterCursor;
 		const newLines = [...lines];
 		newLines[cursorLine] = newLine;
 

packages/tui/test/autocomplete.test.ts

@@ -264,6 +264,26 @@ describe("CombinedAutocompleteProvider", () => {
 			assert.ok(values?.includes('@"my folder/test.txt"'));
 			assert.ok(values?.includes('@"my folder/other.txt"'));
 		});
+
+		test("applies quoted @ completion without duplicating closing quote", () => {
+			setupFolder(baseDir, {
+				files: {
+					"my folder/test.txt": "content",
+				},
+			});
+
+			const provider = new CombinedAutocompleteProvider([], baseDir, requireFdPath());
+			const line = '@"my folder/te"';
+			const cursorCol = line.length - 1;
+			const result = provider.getSuggestions([line], 0, cursorCol);
+
+			assert.notEqual(result, null, "Should return suggestions for quoted @ path");
+			const item = result?.items.find((entry) => entry.value === '@"my folder/test.txt"');
+			assert.ok(item, "Should find test.txt suggestion");
+
+			const applied = provider.applyCompletion([line], 0, cursorCol, item!, result!.prefix);
+			assert.strictEqual(applied.lines[0], '@"my folder/test.txt" ');
+		});
 	});
 
 	describe("quoted path completion", () => {
@@ -311,5 +331,25 @@ describe("CombinedAutocompleteProvider", () => {
 			assert.ok(values?.includes('"my folder/test.txt"'));
 			assert.ok(values?.includes('"my folder/other.txt"'));
 		});
+
+		test("applies quoted completion without duplicating closing quote", () => {
+			setupFolder(baseDir, {
+				files: {
+					"my folder/test.txt": "content",
+				},
+			});
+
+			const provider = new CombinedAutocompleteProvider([], baseDir);
+			const line = '"my folder/te"';
+			const cursorCol = line.length - 1;
+			const result = provider.getForceFileSuggestions([line], 0, cursorCol);
+
+			assert.notEqual(result, null, "Should return suggestions for quoted path");
+			const item = result?.items.find((entry) => entry.value === '"my folder/test.txt"');
+			assert.ok(item, "Should find test.txt suggestion");
+
+			const applied = provider.applyCompletion([line], 0, cursorCol, item!, result!.prefix);
+			assert.strictEqual(applied.lines[0], '"my folder/test.txt"');
+		});
 	});
 });