feat(coding-agent,tui): add stacked autocomplete providers closes #2983

packages/tui/test/editor.test.ts

@@ -2132,6 +2132,39 @@ describe("Editor component", () => {
 			assert.strictEqual(editor.isShowingAutocomplete(), true);
 		});
 
+		it("debounces # autocomplete while typing", async () => {
+			const editor = new Editor(createTestTUI(), defaultEditorTheme);
+			let suggestionCalls = 0;
+
+			const mockProvider: AutocompleteProvider = {
+				getSuggestions: async (lines, _cursorLine, cursorCol) => {
+					suggestionCalls += 1;
+					const text = (lines[0] || "").slice(0, cursorCol);
+					return {
+						items: [{ value: "#2983", label: "#2983" }],
+						prefix: text,
+					};
+				},
+				applyCompletion,
+			};
+
+			editor.setAutocompleteProvider(mockProvider);
+
+			editor.handleInput("#");
+			editor.handleInput("2");
+			editor.handleInput("9");
+			editor.handleInput("8");
+
+			assert.strictEqual(suggestionCalls, 0);
+			assert.strictEqual(editor.isShowingAutocomplete(), false);
+
+			await new Promise((resolve) => setTimeout(resolve, 50));
+			await flushAutocomplete();
+
+			assert.strictEqual(suggestionCalls, 1);
+			assert.strictEqual(editor.isShowingAutocomplete(), true);
+		});
+
 		it("aborts active @ autocomplete when typing continues", async () => {
 			const editor = new Editor(createTestTUI(), defaultEditorTheme);
 			let aborts = 0;