.storybook/main.ts

@@ -2,6 +2,7 @@ import type { StorybookConfig } from "@storybook/sveltekit";
 
 const config: StorybookConfig = {
   stories: ["../src/**/*.stories.@(js|ts|svelte)"],
+  staticDirs: ["../static"],
   addons: [
     "@storybook/addon-svelte-csf",
     "@storybook/addon-a11y",

.storybook/preview.ts

@@ -1,5 +1,17 @@
 import "../src/app.css";
 import type { Preview } from "@storybook/sveltekit";
+import { setupWorker } from "msw/browser";
+import { externalApiHandlers } from "../src/lib/testing/external-api-mocks";
+
+if (typeof window !== "undefined") {
+  const worker = setupWorker(...externalApiHandlers);
+  void worker.start({
+    onUnhandledRequest: "bypass",
+    serviceWorker: {
+      url: "/mockServiceWorker.js",
+    },
+  });
+}
 
 const preview: Preview = {
   parameters: {

README.md

@@ -22,7 +22,7 @@ This MVP uses Drizzle with Bun SQLite for local file-backed persistence.
 - `bun run check`: run Svelte and TypeScript checks.
 - `bun run test`: run Vitest.
 - `bun run test:unit`: run Vitest explicitly as the unit test stage.
-- `bun run test:e2e`: run Playwright browser smoke and QA checks.
+- `bun run test:e2e`: build and run Playwright browser smoke and QA checks.
 - `bun run test:qa`: run the MVP release gate.
 - `bun run build`: build the production app.
 - `bun run preview`: preview the production build.
@@ -90,9 +90,13 @@ bun run test:qa
 The gate runs Svelte/TypeScript checks, Vitest coverage for model,
 persistence, renderer, datasource mocks, and presentation boundaries, the
 production build, the static Storybook build, and Playwright desktop/mobile
-smoke checks. Playwright also performs basic screenshot sanity checks,
-keyboard-focus checks, reduced-motion checks, landmark checks, and axe
-accessibility checks against the real model-driven route.
+smoke checks against the built adapter output. Playwright also performs
+baseline screenshot checks, keyboard navigation checks, reduced-motion checks,
+landmark checks, and axe accessibility checks against the real model-driven
+route.
+
+Playwright uses an isolated SQLite database per run unless
+`PLAYWRIGHT_DATABASE_URL` is set explicitly.
 
 Presentation code is checked for Dimension Lab content leakage. Environment
 specific labels, links, icon names, fallback values, and datasource references

package.json

@@ -44,5 +44,10 @@
     "typescript": "^6.0.3",
     "vite": "^8.0.16",
     "vitest": "^4.1.9"
+  },
+  "msw": {
+    "workerDirectory": [
+      "static"
+    ]
   }
 }

playwright.config.ts

@@ -2,6 +2,9 @@ import { defineConfig, devices } from "@playwright/test";
 
 const port = Number(process.env.PLAYWRIGHT_PORT || 4173);
 const baseURL = `http://127.0.0.1:${port}`;
+const databaseUrl =
+  process.env.PLAYWRIGHT_DATABASE_URL ||
+  `file:./data/playwright-${process.pid}-${Date.now()}.sqlite`;
 
 export default defineConfig({
   testDir: "tests/e2e",
@@ -15,9 +18,9 @@ export default defineConfig({
     screenshot: "only-on-failure",
   },
   webServer: {
-    command: `DATABASE_URL=file:./data/playwright.sqlite bun run dev -- --port ${port}`,
+    command: `bun run build && DATABASE_URL=${databaseUrl} HOST=127.0.0.1 PORT=${port} bun build/index.js`,
     url: baseURL,
-    reuseExistingServer: !process.env.CI,
+    reuseExistingServer: false,
     timeout: 120_000,
   },
   projects: [

src/lib/presentation-boundary.test.ts

@@ -37,7 +37,7 @@ function readPresentationSource(path: string): string {
   if (stats.isFile()) {
     if (path.endsWith(".test.ts")) return "";
     if (path.includes(`${join("src", "lib", "ui", "stories")}${"/"}`)) return "";
-    if (!/\.(svelte|ts|css)$/.test(path)) return "";
+    if (!/\.(svelte|svelte\.js|ts|js|mjs|css|json)$/.test(path)) return "";
     return readFileSync(path, "utf8");
   }
 

src/lib/testing/external-api-mocks.test.ts

@@ -1,7 +1,22 @@
-import { describe, expect, test } from "vitest";
+import { setupServer } from "msw/node";
+import { afterAll, afterEach, beforeAll, describe, expect, test } from "vitest";
 import { externalApiHandlers } from "./external-api-mocks";
 
+const server = setupServer(...externalApiHandlers);
+
 describe("external API mocks", () => {
+  beforeAll(() => {
+    server.listen({ onUnhandledRequest: "error" });
+  });
+
+  afterEach(() => {
+    server.resetHandlers();
+  });
+
+  afterAll(() => {
+    server.close();
+  });
+
   test("defines deterministic handlers for deferred datasource adapters", () => {
     expect(externalApiHandlers).toHaveLength(3);
     expect(externalApiHandlers.map((handler) => handler.info.header)).toEqual([
@@ -10,4 +25,31 @@ describe("external API mocks", () => {
       "GET https://api.open-meteo.com/v1/forecast",
     ]);
   });
+
+  test("intercepts deferred datasource requests without live services", async () => {
+    const prometheus = await fetch(
+      "https://prometheus.dimensionlab.net/api/v1/query",
+    ).then((response) => response.json());
+    const status = await fetch(
+      "https://uptime.dimensionlab.net/api/status-page/dimensionlab",
+    ).then((response) => response.json());
+    const weather = await fetch(
+      "https://api.open-meteo.com/v1/forecast?latitude=52.37&longitude=4.9",
+    ).then((response) => response.json());
+
+    expect(prometheus).toMatchObject({
+      status: "success",
+      data: { result: [{ value: [1771430400, "1"] }] },
+    });
+    expect(status).toMatchObject({
+      status: "ok",
+      incidents: [],
+    });
+    expect(weather).toMatchObject({
+      current: {
+        temperature_2m: 21.4,
+        weather_code: 0,
+      },
+    });
+  });
 });

static/mockServiceWorker.js

@@ -0,0 +1,349 @@
+/* eslint-disable */
+/* tslint:disable */
+
+/**
+ * Mock Service Worker.
+ * @see https://github.com/mswjs/msw
+ * - Please do NOT modify this file.
+ */
+
+const PACKAGE_VERSION = '2.14.6'
+const INTEGRITY_CHECKSUM = '4db4a41e972cec1b64cc569c66952d82'
+const IS_MOCKED_RESPONSE = Symbol('isMockedResponse')
+const activeClientIds = new Set()
+
+addEventListener('install', function () {
+  self.skipWaiting()
+})
+
+addEventListener('activate', function (event) {
+  event.waitUntil(self.clients.claim())
+})
+
+addEventListener('message', async function (event) {
+  const clientId = Reflect.get(event.source || {}, 'id')
+
+  if (!clientId || !self.clients) {
+    return
+  }
+
+  const client = await self.clients.get(clientId)
+
+  if (!client) {
+    return
+  }
+
+  const allClients = await self.clients.matchAll({
+    type: 'window',
+  })
+
+  switch (event.data) {
+    case 'KEEPALIVE_REQUEST': {
+      sendToClient(client, {
+        type: 'KEEPALIVE_RESPONSE',
+      })
+      break
+    }
+
+    case 'INTEGRITY_CHECK_REQUEST': {
+      sendToClient(client, {
+        type: 'INTEGRITY_CHECK_RESPONSE',
+        payload: {
+          packageVersion: PACKAGE_VERSION,
+          checksum: INTEGRITY_CHECKSUM,
+        },
+      })
+      break
+    }
+
+    case 'MOCK_ACTIVATE': {
+      activeClientIds.add(clientId)
+
+      sendToClient(client, {
+        type: 'MOCKING_ENABLED',
+        payload: {
+          client: {
+            id: client.id,
+            frameType: client.frameType,
+          },
+        },
+      })
+      break
+    }
+
+    case 'CLIENT_CLOSED': {
+      activeClientIds.delete(clientId)
+
+      const remainingClients = allClients.filter((client) => {
+        return client.id !== clientId
+      })
+
+      // Unregister itself when there are no more clients
+      if (remainingClients.length === 0) {
+        self.registration.unregister()
+      }
+
+      break
+    }
+  }
+})
+
+addEventListener('fetch', function (event) {
+  const requestInterceptedAt = Date.now()
+
+  // Bypass navigation requests.
+  if (event.request.mode === 'navigate') {
+    return
+  }
+
+  // Opening the DevTools triggers the "only-if-cached" request
+  // that cannot be handled by the worker. Bypass such requests.
+  if (
+    event.request.cache === 'only-if-cached' &&
+    event.request.mode !== 'same-origin'
+  ) {
+    return
+  }
+
+  // Bypass all requests when there are no active clients.
+  // Prevents the self-unregistered worked from handling requests
+  // after it's been terminated (still remains active until the next reload).
+  if (activeClientIds.size === 0) {
+    return
+  }
+
+  const requestId = crypto.randomUUID()
+  event.respondWith(handleRequest(event, requestId, requestInterceptedAt))
+})
+
+/**
+ * @param {FetchEvent} event
+ * @param {string} requestId
+ * @param {number} requestInterceptedAt
+ */
+async function handleRequest(event, requestId, requestInterceptedAt) {
+  const client = await resolveMainClient(event)
+  const requestCloneForEvents = event.request.clone()
+  const response = await getResponse(
+    event,
+    client,
+    requestId,
+    requestInterceptedAt,
+  )
+
+  // Send back the response clone for the "response:*" life-cycle events.
+  // Ensure MSW is active and ready to handle the message, otherwise
+  // this message will pend indefinitely.
+  if (client && activeClientIds.has(client.id)) {
+    const serializedRequest = await serializeRequest(requestCloneForEvents)
+
+    // Clone the response so both the client and the library could consume it.
+    const responseClone = response.clone()
+
+    sendToClient(
+      client,
+      {
+        type: 'RESPONSE',
+        payload: {
+          isMockedResponse: IS_MOCKED_RESPONSE in response,
+          request: {
+            id: requestId,
+            ...serializedRequest,
+          },
+          response: {
+            type: responseClone.type,
+            status: responseClone.status,
+            statusText: responseClone.statusText,
+            headers: Object.fromEntries(responseClone.headers.entries()),
+            body: responseClone.body,
+          },
+        },
+      },
+      responseClone.body ? [serializedRequest.body, responseClone.body] : [],
+    )
+  }
+
+  return response
+}
+
+/**
+ * Resolve the main client for the given event.
+ * Client that issues a request doesn't necessarily equal the client
+ * that registered the worker. It's with the latter the worker should
+ * communicate with during the response resolving phase.
+ * @param {FetchEvent} event
+ * @returns {Promise<Client | undefined>}
+ */
+async function resolveMainClient(event) {
+  const client = await self.clients.get(event.clientId)
+
+  if (activeClientIds.has(event.clientId)) {
+    return client
+  }
+
+  if (client?.frameType === 'top-level') {
+    return client
+  }
+
+  const allClients = await self.clients.matchAll({
+    type: 'window',
+  })
+
+  return allClients
+    .filter((client) => {
+      // Get only those clients that are currently visible.
+      return client.visibilityState === 'visible'
+    })
+    .find((client) => {
+      // Find the client ID that's recorded in the
+      // set of clients that have registered the worker.
+      return activeClientIds.has(client.id)
+    })
+}
+
+/**
+ * @param {FetchEvent} event
+ * @param {Client | undefined} client
+ * @param {string} requestId
+ * @param {number} requestInterceptedAt
+ * @returns {Promise<Response>}
+ */
+async function getResponse(event, client, requestId, requestInterceptedAt) {
+  // Clone the request because it might've been already used
+  // (i.e. its body has been read and sent to the client).
+  const requestClone = event.request.clone()
+
+  function passthrough() {
+    // Cast the request headers to a new Headers instance
+    // so the headers can be manipulated with.
+    const headers = new Headers(requestClone.headers)
+
+    // Remove the "accept" header value that marked this request as passthrough.
+    // This prevents request alteration and also keeps it compliant with the
+    // user-defined CORS policies.
+    const acceptHeader = headers.get('accept')
+    if (acceptHeader) {
+      const values = acceptHeader.split(',').map((value) => value.trim())
+      const filteredValues = values.filter(
+        (value) => value !== 'msw/passthrough',
+      )
+
+      if (filteredValues.length > 0) {
+        headers.set('accept', filteredValues.join(', '))
+      } else {
+        headers.delete('accept')
+      }
+    }
+
+    return fetch(requestClone, { headers })
+  }
+
+  // Bypass mocking when the client is not active.
+  if (!client) {
+    return passthrough()
+  }
+
+  // Bypass initial page load requests (i.e. static assets).
+  // The absence of the immediate/parent client in the map of the active clients
+  // means that MSW hasn't dispatched the "MOCK_ACTIVATE" event yet
+  // and is not ready to handle requests.
+  if (!activeClientIds.has(client.id)) {
+    return passthrough()
+  }
+
+  // Notify the client that a request has been intercepted.
+  const serializedRequest = await serializeRequest(event.request)
+  const clientMessage = await sendToClient(
+    client,
+    {
+      type: 'REQUEST',
+      payload: {
+        id: requestId,
+        interceptedAt: requestInterceptedAt,
+        ...serializedRequest,
+      },
+    },
+    [serializedRequest.body],
+  )
+
+  switch (clientMessage.type) {
+    case 'MOCK_RESPONSE': {
+      return respondWithMock(clientMessage.data)
+    }
+
+    case 'PASSTHROUGH': {
+      return passthrough()
+    }
+  }
+
+  return passthrough()
+}
+
+/**
+ * @param {Client} client
+ * @param {any} message
+ * @param {Array<Transferable>} transferrables
+ * @returns {Promise<any>}
+ */
+function sendToClient(client, message, transferrables = []) {
+  return new Promise((resolve, reject) => {
+    const channel = new MessageChannel()
+
+    channel.port1.onmessage = (event) => {
+      if (event.data && event.data.error) {
+        return reject(event.data.error)
+      }
+
+      resolve(event.data)
+    }
+
+    client.postMessage(message, [
+      channel.port2,
+      ...transferrables.filter(Boolean),
+    ])
+  })
+}
+
+/**
+ * @param {Response} response
+ * @returns {Response}
+ */
+function respondWithMock(response) {
+  // Setting response status code to 0 is a no-op.
+  // However, when responding with a "Response.error()", the produced Response
+  // instance will have status code set to 0. Since it's not possible to create
+  // a Response instance with status code 0, handle that use-case separately.
+  if (response.status === 0) {
+    return Response.error()
+  }
+
+  const mockedResponse = new Response(response.body, response)
+
+  Reflect.defineProperty(mockedResponse, IS_MOCKED_RESPONSE, {
+    value: true,
+    enumerable: true,
+  })
+
+  return mockedResponse
+}
+
+/**
+ * @param {Request} request
+ */
+async function serializeRequest(request) {
+  return {
+    url: request.url,
+    mode: request.mode,
+    method: request.method,
+    headers: Object.fromEntries(request.headers.entries()),
+    cache: request.cache,
+    credentials: request.credentials,
+    destination: request.destination,
+    integrity: request.integrity,
+    redirect: request.redirect,
+    referrer: request.referrer,
+    referrerPolicy: request.referrerPolicy,
+    body: await request.arrayBuffer(),
+    keepalive: request.keepalive,
+  }
+}

tests/e2e/dashboard.spec.ts

@@ -1,6 +1,26 @@
 import AxeBuilder from "@axe-core/playwright";
 import { expect, test } from "@playwright/test";
 
+const linkedServiceIds = [
+  "vaultwarden",
+  "forgejo",
+  "wiki",
+  "aws-start",
+  "grafana",
+  "uptime-kuma",
+  "prometheus",
+  "backrest",
+  "n8n",
+  "open-webui",
+  "comfyui",
+  "models",
+  "adminer",
+  "assistant",
+  "suna",
+  "cockpit-infra",
+  "forgejo-ssh-relay",
+];
+
 test.describe("dashboard page QA gate", () => {
   test("renders the model-driven dashboard on desktop", async ({
     page,
@@ -23,8 +43,9 @@ test.describe("dashboard page QA gate", () => {
     const bodyBox = await page.locator("body").boundingBox();
     expect(bodyBox?.width).toBeGreaterThan(1000);
 
-    const screenshot = await page.screenshot({ fullPage: true });
-    expect(screenshot.byteLength).toBeGreaterThan(20_000);
+    await expect(page).toHaveScreenshot("dashboard-desktop.png", {
+      fullPage: true,
+    });
   });
 
   test("keeps the first screen usable on mobile", async ({ page }, testInfo) => {
@@ -37,8 +58,9 @@ test.describe("dashboard page QA gate", () => {
     ).toBeVisible();
     await expect(page.getByLabel("Service groups")).toBeVisible();
 
-    const screenshot = await page.screenshot({ fullPage: true });
-    expect(screenshot.byteLength).toBeGreaterThan(12_000);
+    await expect(page).toHaveScreenshot("dashboard-mobile.png", {
+      fullPage: true,
+    });
   });
 
   test("exposes usable landmarks and a visible keyboard focus state", async ({
@@ -47,15 +69,17 @@ test.describe("dashboard page QA gate", () => {
     await page.goto("/");
 
     await expect(page.getByRole("main")).toHaveCount(1);
-    await page.keyboard.press("Tab");
+    for (const serviceId of linkedServiceIds) {
+      await page.keyboard.press("Tab");
 
-    const focused = page.locator(":focus");
-    await expect(focused).toHaveAttribute("href", /vault\.dimensionlab\.net/);
+      const focused = page.locator(":focus");
+      await expect(focused).toHaveAttribute("data-model-id", serviceId);
 
-    const focusBoxShadow = await focused.evaluate((element) => {
-      return window.getComputedStyle(element).boxShadow;
-    });
-    expect(focusBoxShadow).not.toBe("none");
+      const focusBoxShadow = await focused.evaluate((element) => {
+        return window.getComputedStyle(element).boxShadow;
+      });
+      expect(focusBoxShadow).not.toBe("none");
+    }
   });
 
   test("passes automated accessibility checks", async ({ page }) => {
@@ -65,34 +89,29 @@ test.describe("dashboard page QA gate", () => {
     expect(results.violations).toEqual([]);
   });
 
-  test("honors reduced-motion preferences", async ({ browser }) => {
-    const context = await browser.newContext({ reducedMotion: "reduce" });
-    const page = await context.newPage();
+  test("honors reduced-motion preferences", async ({ page }) => {
+    await page.emulateMedia({ reducedMotion: "reduce" });
 
-    try {
-      await page.goto("/");
-      const durations = await page.evaluate(() => {
-        const element = document.createElement("div");
-        element.style.animation = "qa-motion-check 10s infinite";
-        element.style.transition = "opacity 10s linear";
-        document.body.append(element);
+    await page.goto("/");
+    const durations = await page.evaluate(() => {
+      const element = document.createElement("div");
+      element.style.animation = "qa-motion-check 10s infinite";
+      element.style.transition = "opacity 10s linear";
+      document.body.append(element);
 
-        const styles = window.getComputedStyle(element);
-        return {
-          animation: styles.animationDuration,
-          transition: styles.transitionDuration,
-        };
-      });
+      const styles = window.getComputedStyle(element);
+      return {
+        animation: styles.animationDuration,
+        transition: styles.transitionDuration,
+      };
+    });
 
-      expect(cssDurationToMilliseconds(durations.animation)).toBeLessThanOrEqual(
-        0.01,
-      );
-      expect(cssDurationToMilliseconds(durations.transition)).toBeLessThanOrEqual(
-        0.01,
-      );
-    } finally {
-      await context.close();
-    }
+    expect(cssDurationToMilliseconds(durations.animation)).toBeLessThanOrEqual(
+      0.01,
+    );
+    expect(cssDurationToMilliseconds(durations.transition)).toBeLessThanOrEqual(
+      0.01,
+    );
   });
 });