perf(test): parallelize unit test files to halve validate wall time

nx.json

@@ -15,10 +15,22 @@
 			"cache": true
 		},
 		"test": {
-			"cache": true
+			"cache": true,
+			"inputs": [
+				"default",
+				"^default",
+				"{workspaceRoot}/vitest*.ts",
+				"{workspaceRoot}/tools/**/*"
+			]
 		},
 		"test-mcp": {
-			"cache": true
+			"cache": true,
+			"inputs": [
+				"default",
+				"^default",
+				"{workspaceRoot}/vitest*.ts",
+				"{workspaceRoot}/tools/**/*"
+			]
 		},
 		"prepare-e2e-env": {
 			"cache": true

playwright.config.ts

@@ -27,6 +27,10 @@ export default defineConfig({
 	webServer: {
 		command: webServerCommand,
 		url: baseURL,
+		// Startup (client build + D1 migrations + Wrangler boot) competes with
+		// the parallel unit test workers at the beginning of `validate`, and the
+		// default 60s budget times out on 4-core CI runners.
+		timeout: process.env.CI ? 180_000 : 60_000,
 		reuseExistingServer: hasExplicitBaseUrl,
 		env: {
 			CLOUDFLARE_ENV: 'test',

vitest-shared.ts

@@ -45,7 +45,10 @@ export const sharedProjectConfig = {
 	test: {
 		testTimeout,
 		hookTimeout: testTimeout,
-		fileParallelism: false,
+		// `validate` runs this suite concurrently with Playwright and two
+		// Wrangler servers on 4-core CI runners; leave a core free so their
+		// startup is not starved by test workers.
+		maxWorkers: process.env.CI ? 3 : undefined,
 		clearMocks: true,
 		mockReset: true,
 		setupFiles: [

vitest.mcp-e2e.config.ts

@@ -15,6 +15,9 @@ export default mergeConfig(
 			include: ['**/*.mcp-e2e.test.ts'],
 			testTimeout: mcpE2eTimeout,
 			hookTimeout: mcpE2eTimeout,
+			// Each file boots a real Wrangler dev server and shares the seeded
+			// e2e database, so files must not run in parallel.
+			fileParallelism: false,
 		},
 	}),
 )