diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0f8439f..59b65bb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,3 +21,21 @@ jobs:
       - run: npm run lint
       - run: npm test
       - run: npm run build
+
+  visual-regression:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-node@v6
+        with:
+          node-version: 24
+          cache: npm
+      - run: npm ci
+      - run: npx playwright install --with-deps chromium
+      - run: npm run test:visual
+      - if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: playwright-report
+          path: playwright-report/
+          retention-days: 14
diff --git a/.gitignore b/.gitignore
index 1bfcb0a..c218d2a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,7 @@ coverage/
 *.log
 *.tsbuildinfo
 .DS_Store
+test-results/
+playwright-report/
+blob-report/
+playwright/.cache/
diff --git a/package.json b/package.json
index 9562460..cbffd69 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,9 @@
     "dev": "vite",
     "build": "tsc -b && vite build",
     "lint": "eslint .",
-    "test": "vitest run"
+    "test": "vitest run",
+    "test:visual": "playwright test",
+    "test:visual:update": "playwright test --update-snapshots"
   },
   "dependencies": {
     "@vitejs/plugin-react": "latest",
@@ -17,6 +19,7 @@
   },
   "devDependencies": {
     "@eslint/js": "latest",
+    "@playwright/test": "latest",
     "@testing-library/jest-dom": "latest",
     "@testing-library/react": "latest",
     "@types/react": "latest",
diff --git a/playwright.config.ts b/playwright.config.ts
new file mode 100644
index 0000000..c1d7272
--- /dev/null
+++ b/playwright.config.ts
@@ -0,0 +1,29 @@
+import { defineConfig, devices } from "@playwright/test";
+
+/**
+ * Visual regression config for the landing page. Baselines live under
+ * tests/visual/*-snapshots/ and are generated/refreshed with
+ * `npm run test:visual:update`.
+ */
+export default defineConfig({
+  testDir: "./tests/visual",
+  snapshotPathTemplate: "{testDir}/{testFileDir}/__screenshots__/{arg}{ext}",
+  fullyParallel: true,
+  forbidOnly: !!process.env.CI,
+  retries: process.env.CI ? 1 : 0,
+  reporter: "list",
+  use: {
+    baseURL: "http://localhost:4173",
+  },
+  webServer: {
+    command: "npm run build && npm run dev -- --port 4173",
+    url: "http://localhost:4173",
+    reuseExistingServer: !process.env.CI,
+  },
+  projects: [
+    {
+      name: "chromium",
+      use: { ...devices["Desktop Chrome"] },
+    },
+  ],
+});
diff --git a/src/App.test.tsx b/src/App.test.tsx
new file mode 100644
index 0000000..8676631
--- /dev/null
+++ b/src/App.test.tsx
@@ -0,0 +1,65 @@
+import { fireEvent, render, screen, waitFor } from "@testing-library/react";
+import { afterEach, describe, expect, it, vi } from "vitest";
+import App from "./App";
+
+describe("App command copy", () => {
+  const originalClipboard = navigator.clipboard;
+
+  afterEach(() => {
+    Object.defineProperty(navigator, "clipboard", {
+      value: originalClipboard,
+      configurable: true,
+    });
+    vi.restoreAllMocks();
+  });
+
+  it("copies the currently generated command to the clipboard", async () => {
+    const writeText = vi.fn().mockResolvedValue(undefined);
+    Object.defineProperty(navigator, "clipboard", {
+      value: { writeText },
+      configurable: true,
+    });
+
+    render(<App />);
+
+    fireEvent.click(screen.getByRole("button", { name: "Copy" }));
+
+    await waitFor(() =>
+      expect(writeText).toHaveBeenCalledWith("soroban-testkit coverage . --format html --open"),
+    );
+    expect(await screen.findByRole("button", { name: "Copied" })).toBeInTheDocument();
+  });
+
+  it("copies the command for the selected tab, not the default one", async () => {
+    const writeText = vi.fn().mockResolvedValue(undefined);
+    Object.defineProperty(navigator, "clipboard", {
+      value: { writeText },
+      configurable: true,
+    });
+
+    render(<App />);
+
+    fireEvent.click(screen.getByRole("button", { name: "audit" }));
+    fireEvent.click(screen.getByRole("button", { name: "Copy" }));
+
+    await waitFor(() =>
+      expect(writeText).toHaveBeenCalledWith("soroban-testkit audit . --strict"),
+    );
+  });
+
+  it("still copies successfully when the browser has no Clipboard API", async () => {
+    Object.defineProperty(navigator, "clipboard", {
+      value: undefined,
+      configurable: true,
+    });
+    const execCommand = vi.fn().mockReturnValue(true);
+    document.execCommand = execCommand;
+
+    render(<App />);
+
+    fireEvent.click(screen.getByRole("button", { name: "Copy" }));
+
+    await waitFor(() => expect(execCommand).toHaveBeenCalledWith("copy"));
+    expect(await screen.findByRole("button", { name: "Copied" })).toBeInTheDocument();
+  });
+});
diff --git a/src/App.tsx b/src/App.tsx
index 80f1c00..902695f 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,5 +1,6 @@
 import { useMemo, useState } from "react";
 import { buildCommand, modules, type CommandName } from "./testkit";
+import { copyToClipboard } from "./clipboard";
 
 const descriptions: Record<CommandName, string> = {
   coverage: "Generate contract-test coverage through cargo-llvm-cov.",
@@ -23,7 +24,7 @@ export default function App() {
   );
 
   const copy = async () => {
-    await navigator.clipboard.writeText(generated);
+    await copyToClipboard(generated);
     setCopied(true);
     window.setTimeout(() => setCopied(false), 1600);
   };
diff --git a/src/clipboard.test.ts b/src/clipboard.test.ts
new file mode 100644
index 0000000..c9ced55
--- /dev/null
+++ b/src/clipboard.test.ts
@@ -0,0 +1,56 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { copyToClipboard } from "./clipboard";
+
+describe("copyToClipboard", () => {
+  const originalClipboard = navigator.clipboard;
+
+  afterEach(() => {
+    Object.defineProperty(navigator, "clipboard", {
+      value: originalClipboard,
+      configurable: true,
+    });
+    vi.restoreAllMocks();
+  });
+
+  it("uses the Clipboard API when the browser supports it", async () => {
+    const writeText = vi.fn().mockResolvedValue(undefined);
+    Object.defineProperty(navigator, "clipboard", {
+      value: { writeText },
+      configurable: true,
+    });
+
+    await copyToClipboard("soroban-testkit audit .");
+
+    expect(writeText).toHaveBeenCalledWith("soroban-testkit audit .");
+  });
+
+  it("falls back to execCommand when navigator.clipboard is unavailable", async () => {
+    Object.defineProperty(navigator, "clipboard", {
+      value: undefined,
+      configurable: true,
+    });
+    const execCommand = vi.fn().mockReturnValue(true);
+    document.execCommand = execCommand;
+
+    await expect(
+      copyToClipboard("soroban-testkit coverage . --format html"),
+    ).resolves.toBeUndefined();
+
+    expect(execCommand).toHaveBeenCalledWith("copy");
+    // The off-screen textarea used for the fallback must not leak into the DOM.
+    expect(document.querySelector("textarea")).toBeNull();
+  });
+
+  it("surfaces an error when the fallback copy is rejected by the browser", async () => {
+    Object.defineProperty(navigator, "clipboard", {
+      value: undefined,
+      configurable: true,
+    });
+    document.execCommand = vi.fn().mockReturnValue(false);
+
+    await expect(copyToClipboard("soroban-testkit audit .")).rejects.toThrow(
+      "execCommand('copy') was rejected by the browser",
+    );
+    expect(document.querySelector("textarea")).toBeNull();
+  });
+});
diff --git a/src/clipboard.ts b/src/clipboard.ts
new file mode 100644
index 0000000..a084877
--- /dev/null
+++ b/src/clipboard.ts
@@ -0,0 +1,28 @@
+/**
+ * Copies `text` to the clipboard, falling back to the `document.execCommand`
+ * path for browsers (or embedded/non-HTTPS contexts) where
+ * `navigator.clipboard` is unavailable.
+ */
+export async function copyToClipboard(text: string): Promise<void> {
+  if (navigator.clipboard) {
+    await navigator.clipboard.writeText(text);
+    return;
+  }
+
+  const textarea = document.createElement("textarea");
+  textarea.value = text;
+  textarea.setAttribute("readonly", "");
+  textarea.style.position = "fixed";
+  textarea.style.opacity = "0";
+  document.body.appendChild(textarea);
+  textarea.select();
+
+  try {
+    const succeeded = document.execCommand("copy");
+    if (!succeeded) {
+      throw new Error("execCommand('copy') was rejected by the browser");
+    }
+  } finally {
+    document.body.removeChild(textarea);
+  }
+}
diff --git a/src/testkit.test.ts b/src/testkit.test.ts
index 22226a8..f03c0b1 100644
--- a/src/testkit.test.ts
+++ b/src/testkit.test.ts
@@ -11,4 +11,39 @@ describe("buildCommand", () => {
     expect(buildCommand({ command: "audit", path: "./my contract/src", format: "text", open: false, fn: "", ramp: "", strict: true }))
       .toBe('soroban-testkit audit "./my contract/src" --strict');
   });
+
+  it("does not quote a coverage path with no spaces", () => {
+    expect(buildCommand({ command: "coverage", path: "./contracts/escrow", format: "lcov", open: false, fn: "", ramp: "", strict: false }))
+      .toBe("soroban-testkit coverage ./contracts/escrow --format lcov");
+  });
+
+  it("quotes a coverage path containing spaces", () => {
+    expect(buildCommand({ command: "coverage", path: "./my contract", format: "html", open: false, fn: "", ramp: "", strict: false }))
+      .toBe('soroban-testkit coverage "./my contract" --format html');
+  });
+
+  it("quotes the limits --contract path when it contains spaces", () => {
+    expect(buildCommand({ command: "limits", path: "./target/my build/contract.wasm", format: "html", open: false, fn: "batch_payout", ramp: "recipients", strict: false }))
+      .toBe('soroban-testkit limits --contract "./target/my build/contract.wasm" --fn batch_payout --ramp recipients');
+  });
+
+  it("falls back to the default contract path for limits, unquoted", () => {
+    expect(buildCommand({ command: "limits", path: "", format: "html", open: false, fn: "", ramp: "", strict: false }))
+      .toBe("soroban-testkit limits --contract target/wasm32v1-none/release/contract.wasm --fn batch_payout --ramp recipients");
+  });
+
+  it("does not quote an audit path with no spaces", () => {
+    expect(buildCommand({ command: "audit", path: "./src", format: "text", open: false, fn: "", ramp: "", strict: false }))
+      .toBe("soroban-testkit audit ./src");
+  });
+
+  it("falls back to the default audit path, unquoted, when none is given", () => {
+    expect(buildCommand({ command: "audit", path: "", format: "text", open: false, fn: "", ramp: "", strict: false }))
+      .toBe("soroban-testkit audit ./src");
+  });
+
+  it("quotes a path with multiple spaces as a single argument", () => {
+    expect(buildCommand({ command: "audit", path: "./a b c", format: "text", open: false, fn: "", ramp: "", strict: false }))
+      .toBe('soroban-testkit audit "./a b c"');
+  });
 });
diff --git a/tests/visual/landing.spec.ts b/tests/visual/landing.spec.ts
new file mode 100644
index 0000000..e186581
--- /dev/null
+++ b/tests/visual/landing.spec.ts
@@ -0,0 +1,35 @@
+import { expect, test } from "@playwright/test";
+
+test.describe("landing page visual regression", () => {
+  test("hero section matches the baseline", async ({ page }) => {
+    await page.goto("/");
+    await expect(page.locator("#top")).toHaveScreenshot("hero.png");
+  });
+
+  test("modules section matches the baseline", async ({ page }) => {
+    await page.goto("/");
+    await expect(page.locator("#modules")).toHaveScreenshot("modules.png");
+  });
+
+  test("command workbench matches the baseline for each tab", async ({
+    page,
+  }) => {
+    await page.goto("/");
+    const commands = page.locator("#commands");
+
+    await expect(commands).toHaveScreenshot("commands-coverage.png");
+
+    await page.getByRole("button", { name: "limits" }).click();
+    await expect(commands).toHaveScreenshot("commands-limits.png");
+
+    await page.getByRole("button", { name: "audit" }).click();
+    await expect(commands).toHaveScreenshot("commands-audit.png");
+  });
+
+  test("full page matches the baseline", async ({ page }) => {
+    await page.goto("/");
+    await expect(page).toHaveScreenshot("full-page.png", {
+      fullPage: true,
+    });
+  });
+});