diff --git a/e2e/chat-thread.spec.ts b/e2e/chat-thread.spec.ts
new file mode 100644
index 00000000..508a5c20
--- /dev/null
+++ b/e2e/chat-thread.spec.ts
@@ -0,0 +1,23 @@
+import { expect, test } from "@playwright/test";
+
+test("an agent turn renders its reasoning and tool parts, each expanding on click", async ({
+  page,
+}) => {
+  await page.goto("/chat-thread");
+  const turn = page.getByRole("article", { name: "Scout replied" });
+  await expect(turn.getByText("Three commits landed today.")).toBeVisible();
+
+  const reasoning = turn.locator("details");
+  await expect(reasoning).not.toHaveAttribute("open");
+  await reasoning.locator("summary").click();
+  await expect(reasoning).toHaveAttribute("open");
+  await expect(
+    reasoning.getByText("Check the commit log first."),
+  ).toBeVisible();
+
+  const tool = turn.getByRole("button", { name: /Read today's commits/ });
+  await expect(tool).toHaveAttribute("aria-expanded", "false");
+  await tool.click();
+  await expect(tool).toHaveAttribute("aria-expanded", "true");
+  await expect(turn.getByText("3 commits")).toBeVisible();
+});
diff --git a/e2e/controls.spec.ts b/e2e/controls.spec.ts
new file mode 100644
index 00000000..1025689e
--- /dev/null
+++ b/e2e/controls.spec.ts
@@ -0,0 +1,50 @@
+import { expect, test } from "@playwright/test";
+
+test("Select carries its value, aria wiring and change events to the native control", async ({
+  page,
+}) => {
+  await page.goto("/select");
+  const select = page.getByRole("combobox", { name: "Letter" });
+  await expect(select).toHaveValue("a");
+  await expect(select).toHaveAttribute("aria-invalid", "true");
+  await expect(select).toHaveAttribute("aria-describedby", "letter-error");
+  await select.selectOption("b");
+  await expect(select).toHaveValue("b");
+  await expect(page.getByRole("status", { name: "Events" })).toHaveText("b");
+  await expect(page.getByRole("combobox", { name: "Locked" })).toBeDisabled();
+});
+
+test("FilterChip exposes its selected state through aria-pressed", async ({
+  page,
+}) => {
+  await page.goto("/filter-chip");
+  const chip = page.getByRole("button", { name: "Live" });
+  await expect(chip).toHaveAttribute("aria-pressed", "false");
+  await chip.click();
+  await expect(chip).toHaveAttribute("aria-pressed", "true");
+});
+
+test("DictationStatusLine announces a denial with default copy", async ({
+  page,
+}) => {
+  await page.goto("/dictation-denied");
+  await expect(page.getByRole("alert")).toHaveText(
+    /Microphone access was blocked\./,
+  );
+});
+
+test.describe("AuthLayout panel slot", () => {
+  test.use({ viewport: { width: 1280, height: 800 } });
+
+  test("the decorative panel is empty when panel is omitted", async ({
+    page,
+  }) => {
+    await page.goto("/auth-layout");
+    await expect(page.locator("[aria-hidden=true]").last()).toBeEmpty();
+  });
+
+  test("the panel renders the node it is given", async ({ page }) => {
+    await page.goto("/auth-layout-panel");
+    await expect(page.getByTestId("custom-panel")).toBeVisible();
+  });
+});
diff --git a/e2e/fixtures.tsx b/e2e/fixtures.tsx
index b20b7e01..6f8ae994 100644
--- a/e2e/fixtures.tsx
+++ b/e2e/fixtures.tsx
@@ -3,10 +3,16 @@ import type { ReactNode } from "react";
 
 import {
   ApprovalCard,
+  AuthLayout,
   Button,
+  ChatThread,
+  DictationStatusLine,
+  FilterChip,
+  Select,
   ThemeProvider,
   ThemeToggle,
   type ApprovalRequest,
+  type ChatMessage,
 } from "@corbits/react-ui";
 import {
   CommandPalette,
@@ -79,6 +85,67 @@ function Palette() {
   );
 }
 
+const CHAT: ChatMessage[] = [
+  {
+    id: "m1",
+    role: "user",
+    createdAt: "2026-01-01T09:00:00Z",
+    parts: [{ type: "text", text: "What changed today?" }],
+  },
+  {
+    id: "m2",
+    role: "agent",
+    createdAt: "2026-01-01T09:00:04Z",
+    parts: [
+      { type: "reasoning", text: "Check the commit log first." },
+      {
+        type: "tool",
+        toolCallId: "t1",
+        toolName: "git__log",
+        label: "Read today's commits",
+        state: "done",
+        output: "3 commits",
+      },
+      { type: "text", text: "Three commits landed today." },
+    ],
+  },
+];
+
+function SelectField() {
+  const [value, setValue] = useState("a");
+  const { log, record } = useEventLog();
+  return (
+    <>
+      <Select
+        aria-label="Letter"
+        aria-invalid
+        aria-describedby="letter-error"
+        value={value}
+        onChange={(event) => {
+          setValue(event.target.value);
+          record(event.target.value);
+        }}
+      >
+        <option value="a">A</option>
+        <option value="b">B</option>
+      </Select>
+      <Select aria-label="Locked" value="a" disabled onChange={() => {}}>
+        <option value="a">A</option>
+      </Select>
+      {log}
+    </>
+  );
+}
+
+function Chip() {
+  const [selected, setSelected] = useState(false);
+  return (
+    <FilterChip selected={selected} onClick={() => setSelected(!selected)}>
+      Live
+    </FilterChip>
+  );
+}
+
 const SWATCH_TOKENS = [
   "background",
   "foreground",
@@ -108,6 +175,20 @@ export const scenarios: Record<string, () => ReactNode> = {
   "approval-card": () => <Approval state="idle" />,
   "approval-card-busy": () => <Approval state="approving" />,
   "command-palette": () => <Palette />,
+  "chat-thread": () => (
+    <div style={{ display: "flex", flexDirection: "column", height: 480 }}>
+      <ChatThread messages={CHAT} identity={{ name: "Scout" }} />
+    </div>
+  ),
+  select: () => <SelectField />,
+  "filter-chip": () => <Chip />,
+  "dictation-denied": () => <DictationStatusLine state="denied" />,
+  "auth-layout": () => <AuthLayout>Form</AuthLayout>,
+  "auth-layout-panel": () => (
+    <AuthLayout panel={<div data-testid="custom-panel">custom</div>}>
+      Form
+    </AuthLayout>
+  ),
   theme: () => <Swatches />,
   "theme-toggle": () => (
     <ThemeProvider storageKey="e2e-theme" defaultMode="light">