feat: make playwright optional

tests/plugin.test.ts

@@ -442,7 +442,13 @@ test("playwright MCP prefers direct MCP, uses npx for Playwright, and preserves
         await writeFile(executable, "#!/usr/bin/env node\n");
         await chmod(executable, 0o755);
 
-        const local = await host(allModels, { provider: "test" }, {}, [], localProject);
+        const local = await host(
+            allModels,
+            { provider: "test", playwright: true },
+            {},
+            [],
+            localProject,
+        );
         expect(local.mcpServers.get("playwright")).toEqual({
             type: "local",
             command: [executable],
@@ -475,7 +481,13 @@ test("playwright MCP prefers direct MCP, uses npx for Playwright, and preserves
         );
         await writeFile(ordinaryExecutable, "#!/usr/bin/env node\n");
         await chmod(ordinaryExecutable, 0o755);
-        const ordinary = await host(allModels, { provider: "test" }, {}, [], ordinaryProject);
+        const ordinary = await host(
+            allModels,
+            { provider: "test", playwright: true },
+            {},
+            [],
+            ordinaryProject,
+        );
         expect(ordinary.mcpServers.get("playwright")?.command).toEqual([
             "npx",
             "-y",
@@ -534,7 +546,7 @@ test("playwright MCP prefers direct MCP, uses npx for Playwright, and preserves
         await chmod(fakePlaywright, 0o755);
         expect((await playwrightMcpCommand(globalProject, ordinaryBin))[0]).toBe("docker");
 
-        const fallback = await host();
+        const fallback = await host(allModels, { provider: "test", playwright: true });
         expect(fallback.mcpServers.get("playwright")).toEqual({
             type: "local",
             command: ["docker", "run", "-i", "--rm", "--init", "mcr.microsoft.com/playwright/mcp"],
@@ -561,6 +573,9 @@ test("playwright MCP prefers direct MCP, uses npx for Playwright, and preserves
             timeout: { startup: 12_345 },
         });
         expect(existing.mcpServers.get("docs")?.codemode).toBe(true);
+
+        const disabled = await host();
+        expect(disabled.mcpServers.has("playwright")).toBe(false);
     } finally {
         if (originalPath === undefined) delete process.env.PATH;
         else process.env.PATH = originalPath;