diff --git a/docs/development/validation.md b/docs/development/validation.md
index 715f30fc..4e6c4d5b 100644
--- a/docs/development/validation.md
+++ b/docs/development/validation.md
@@ -69,6 +69,7 @@ node scripts/verify_creation_browser.mjs       # UI/API 主流程与重载
 node tests/browser/reference_reconnect.mjs     # 参考连线删除后重连
 node tests/browser/context_menu_dismissal.mjs  # 右键菜单关闭
 node tests/browser/mp4_export.mjs              # 合成 MP4（WebCodecs + 软件 AAC）
+node tests/browser/new_image_node_outputs.mjs  # 新建图片节点采用所选适配器的比例与尺寸
 ```
 
 `mp4_export.mjs` 以 640x360 渲染：没有 GPU 的无头浏览器只在该尺寸暴露 H.264
diff --git a/tests/browser/new_image_node_outputs.mjs b/tests/browser/new_image_node_outputs.mjs
new file mode 100644
index 00000000..916525c1
--- /dev/null
+++ b/tests/browser/new_image_node_outputs.mjs
@@ -0,0 +1,165 @@
+/** A toolbar image node starts with the selected adapter's outputs, so an
+ * unsent draft never makes the canvas query fail (#86).
+ * Uses the isolated creation_server.py; no generation is submitted.
+ */
+import assert from "node:assert/strict";
+import { launchBrowser } from "./engine.mjs";
+
+const base = process.env.CREATION_WEB_URL ?? "http://127.0.0.1:5179";
+const api = process.env.CREATION_API_URL ?? "http://127.0.0.1:8019";
+const headers = {
+  "X-OpenDirector-Request": "1",
+  "Content-Type": "application/json",
+};
+const raw = (path, init = {}) =>
+  fetch(api + path, { ...init, headers: { ...headers, ...init.headers } });
+async function call(path, body) {
+  const response = await raw(
+    path,
+    body ? { method: "POST", body: JSON.stringify(body) } : {},
+  );
+  assert.ok(response.ok, await response.clone().text());
+  return response.json();
+}
+async function until(read, matches, label) {
+  const deadline = Date.now() + 15000;
+  while (true) {
+    const value = await read();
+    if (matches(value)) return value;
+    assert.ok(Date.now() < deadline, `${label}: ${JSON.stringify(value)}`);
+    await new Promise((resolve) => setTimeout(resolve, 100));
+  }
+}
+
+assert.equal((await call("/api/creation-test-health")).isolated, true);
+// This adapter only declares automatic 2K output; the catalog default is 1:1.
+const seedream =
+  (await call("/api/model-configs")).find(
+    (model) => model.modelId === "doubao-seedream-5.0-flash",
+  ) ??
+  (await call("/api/model-configs", {
+    kind: "image",
+    url: "https://fixture.invalid/api/v3",
+    modelId: "doubao-seedream-5.0-flash",
+    apiKey: "fixture",
+    protocol: "volcengine",
+    connectionType: "api",
+    authMode: "bearer",
+  }));
+assert.deepEqual(seedream.inputRules.imageOutputs, [
+  { aspectRatio: "auto", size: "2K" },
+]);
+const projectId = crypto.randomUUID();
+const project = `/api/creation/projects/${projectId}`;
+await call(project + "/commands", {
+  commandId: crypto.randomUUID(),
+  projectId,
+  type: "project.create",
+  payload: { name: `New image outputs ${projectId.slice(0, 8)}` },
+});
+// The user has chosen this image model in the assistant model picker, which
+// is the model a new node takes. Release the session so the page can edit.
+{
+  const session = crypto.randomUUID();
+  const scoped = { "X-OpenDirector-Session": session };
+  assert.ok((await raw(project + "/open", { method: "POST", headers: scoped })).ok);
+  const { conversationId } = await call(project + "/assistant");
+  const draft = await raw(project + "/assistant/draft", {
+    method: "PUT",
+    headers: scoped,
+    body: JSON.stringify({
+      conversationId,
+      runtime: "default",
+      modelSelections: { image: seedream.id },
+    }),
+  });
+  assert.ok(draft.ok, await draft.text());
+  await raw(`/api/creation/sessions/${session}`, { method: "DELETE" });
+}
+const snapshot = () => call(project);
+const submitted = (await call("/api/creation-test-health")).calls.length;
+
+const browser = await launchBrowser();
+const page = await browser.newPage({ viewport: { width: 1600, height: 1100 } });
+page.setDefaultTimeout(15000);
+const errors = [];
+page.on("pageerror", (error) => errors.push(error.message));
+const failedCanvas = [];
+page.on("response", (response) => {
+  if (/\/canvas(?:\?|$)/.test(response.url()) && response.status() >= 400)
+    failedCanvas.push(response.status());
+});
+try {
+  await page.addInitScript(() =>
+    localStorage.setItem("opendirector.modelSetup.v1", "dismissed"),
+  );
+  await page.goto(`${base}/ai-tool/ai-canvas/${projectId}?creation=unified`);
+  await page
+    .getByText("已保存到本机", { exact: true })
+    .waitFor({ state: "attached" });
+
+  await page
+    .getByRole("toolbar", { name: "画布创作工具" })
+    .getByRole("button", { name: "添加图片", exact: true })
+    .click();
+  assert.match(
+    await page
+      .getByRole("combobox", { name: "生成模型", exact: true })
+      .textContent(),
+    /doubao-seedream-5\.0-flash/,
+  );
+  await page
+    .locator(".cw-composer-body [contenteditable='true']")
+    .first()
+    .click();
+  await page.keyboard.type("海边日落，电影感");
+
+  // The autosaved draft uses an output the adapter declares.
+  const saved = await until(
+    snapshot,
+    (value) =>
+      value.generationSpecs.some(
+        (spec) =>
+          spec.kind === "image" &&
+          spec.modelConfigId === seedream.id &&
+          spec.prompt.includes("海边日落"),
+      ),
+    "draft autosaved with the prompt",
+  );
+  const spec = saved.generationSpecs.find((item) => item.kind === "image");
+  assert.equal(spec.parameters.aspectRatio, null);
+  assert.ok(["auto", "2K"].includes(spec.parameters.size), spec.parameters.size);
+
+  // The canvas stays readable and the draft can be generated.
+  const item = saved.canvasItems[0].id;
+  const canvas = await raw(project + "/canvas");
+  assert.equal(canvas.status, 200, await canvas.clone().text());
+  assert.equal((await canvas.json()).capabilities[item].canGenerate, true);
+
+  await page.reload();
+  await page
+    .getByText("已保存到本机", { exact: true })
+    .waitFor({ state: "attached" });
+  await page.waitForTimeout(1000);
+  assert.equal((await raw(project + "/canvas")).status, 200);
+  assert.equal(
+    (await snapshot()).generationSpecs.find((value) => value.kind === "image")
+      .parameters.aspectRatio,
+    null,
+  );
+  assert.equal(
+    (await call("/api/creation-test-health")).calls.length,
+    submitted,
+    "no generation submitted",
+  );
+  assert.deepEqual(failedCanvas, []);
+  assert.deepEqual(errors, []);
+  console.log("new image node outputs ok");
+} catch (error) {
+  await page
+    .screenshot({ path: ".opendirector/new-image-node-outputs-failure.png" })
+    .catch(() => {});
+  throw error;
+} finally {
+  await browser.close();
+}