feat(plugins): allow plugin workbenches to read and update tab title

apps/desktop/src/App.vue

@@ -5562,6 +5562,7 @@ onUnmounted(() => {
                 <div v-for="workbenchTab in mountedPluginWorkbenchTabs" :key="workbenchTab.id" v-show="activeTab && workbenchTab.id === activeTab.id" class="flex min-h-0 flex-1 flex-col">
                   <PluginWorkbenchTab
                     :ref="(element) => setPluginWorkbenchTabRef(workbenchTab.id, element)"
+                    :tab-id="workbenchTab.id"
                     :plugin-id="workbenchTab.pluginWorkbench!.pluginId"
                     :contribution-id="workbenchTab.pluginWorkbench!.contributionId"
                     :context="workbenchTab.pluginWorkbench!.context"

apps/desktop/src/components/plugins/PluginBottomDock.vue

@@ -330,6 +330,15 @@ function onPanelOpenWorkbench(entry: (typeof entries.value)[number], _contributi
   activatePluginDockEntry(id);
 }
 
+function onSetEntryTitle(entry: PluginDockEntry, title: string | null) {
+  if (title && title.trim()) {
+    renamePluginDockEntry(entry.id, title.trim());
+  } else {
+    const contribution = workbenchContributionFor(entry);
+    renamePluginDockEntry(entry.id, contribution?.label || entry.workbenchContributionId);
+  }
+}
+
 // §8.3/§7.4 two-phase close: removing an entry first asks its panel webview to
 // release the workbench scope (PTY sessions, subscriptions) and waits for the
 // bridge-bounded handshake before the iframe is unmounted.
@@ -638,6 +647,8 @@ onScopeDispose(() => window.removeEventListener("blur", onPlusMenuWindowBlur));
           :plugin="definitionFor(entry.pluginId)!"
           :contribution="workbenchContributionFor(entry)!"
           :context="entry.context"
+          :set-title="(title) => onSetEntryTitle(entry, title)"
+          :get-title="() => entry.title"
           @close-tab="closeEntry(entry.id)"
           @open-workbench="(_pluginId, contributionId, context, options) => onPanelOpenWorkbench(entry, contributionId, context, options)"
         />

apps/desktop/src/components/plugins/PluginWorkbenchHost.vue

@@ -40,6 +40,8 @@ const props = withDefaults(
     plugin: InstalledPlugin;
     contribution: PluginUiContribution;
     context?: PluginWorkbenchContext;
+    setTitle?: (title: string | null) => Promise<void> | void;
+    getTitle?: () => Promise<string> | string;
   }>(),
   { context: () => ({}) },
 );
@@ -524,6 +526,28 @@ function createBridge() {
       ...(isTauriRuntime() ? aiCompletion : {}),
       setAiRecommendations: (update) => emit("recommendations", update),
       openWorkbench: async (pluginId, contributionId, context, options) => emit("openWorkbench", pluginId, contributionId, context, options),
+      // Only expose the title APIs on surfaces that implement them (workbench
+      // tab and dock hosts pass the props); the bridge derives the
+      // `workbenchTitle` capability from their presence, so floating windows
+      // and sidebar hosts must not advertise a silent no-op.
+      ...(() => {
+        const setTitleProp = props.setTitle;
+        const getTitleProp = props.getTitle;
+        return {
+          ...(setTitleProp
+            ? {
+                setTitle: async (newTitle: string | null) => {
+                  await setTitleProp(newTitle);
+                },
+              }
+            : {}),
+          ...(getTitleProp
+            ? {
+                getTitle: async () => await getTitleProp(),
+              }
+            : {}),
+        };
+      })(),
       // §4/§5 bridge command execution, scoped to this plugin's own manifest:
       // the single-plugin registry is equivalent here because findCommand /
       // findWorkbench / enablement never cross plugins. Panel commands dock,

apps/desktop/src/components/plugins/PluginWorkbenchTab.spec.ts

@@ -12,6 +12,8 @@ const mocks = vi.hoisted(() => ({
   repushPluginConnection: vi.fn(),
   ensureConnected: vi.fn(),
   openPluginWorkbench: vi.fn(),
+  setPluginWorkbenchTabTitle: vi.fn(),
+  getPluginWorkbenchTabTitle: vi.fn(),
   connectedIds: new Set<string>(["conn-1"]),
 }));
 
@@ -37,7 +39,13 @@ vi.mock("@/stores/connectionStore", () => ({
     reopenPluginConnection: vi.fn(),
   }),
 }));
-vi.mock("@/stores/queryStore", () => ({ useQueryStore: () => ({ openPluginWorkbench: mocks.openPluginWorkbench }) }));
+vi.mock("@/stores/queryStore", () => ({
+  useQueryStore: () => ({
+    openPluginWorkbench: mocks.openPluginWorkbench,
+    setPluginWorkbenchTabTitle: mocks.setPluginWorkbenchTabTitle,
+    getPluginWorkbenchTabTitle: mocks.getPluginWorkbenchTabTitle,
+  }),
+}));
 vi.mock("vue-i18n", () => ({
   useI18n: () => ({ locale: ref("en"), t: (key: string, params?: Record<string, unknown>) => (params ? `${key} ${JSON.stringify(params)}` : key) }),
 }));
@@ -49,7 +57,7 @@ const plugin: InstalledPlugin = {
     id: "com.example.graph",
     name: "Graph plugin",
     version: "1.0.0",
-    permissions: [],
+    permissions: ["host.workbench"],
     drivers: [],
     entrypoints: { ui: { root: "ui", entry: "ui/index.html" } },
     contributions: [
@@ -154,6 +162,39 @@ describe("PluginWorkbenchTab contribution resolution", () => {
     expect(root.querySelector("iframe")).toBeNull();
     expect(root.textContent).toContain("pluginPlatform.workbenchUnavailable");
   });
+
+  it("forwards setTitle and getTitle from the bridge to queryStore for the tab", async () => {
+    mocks.getPluginWorkbenchTabTitle.mockReturnValue("Tab Original Title");
+    app = createApp(PluginWorkbenchTab, { tabId: "tab-test-1", pluginId: "com.example.graph", contributionId: "graph.main", connectionId: "conn-1" });
+    app.mount(root);
+    await nextTick();
+    await new Promise((resolve) => setTimeout(resolve, 0));
+    await nextTick();
+    const frame = root.querySelector("iframe");
+    expect(frame).toBeInstanceOf(HTMLIFrameElement);
+    const target = frame!.contentWindow!;
+    const postMessage = vi.spyOn(target, "postMessage").mockImplementation(() => {});
+    frame!.dispatchEvent(new Event("load"));
+    await vi.waitFor(() => expect(postMessage).toHaveBeenCalled());
+
+    // Send host.setTitle from the iframe
+    window.dispatchEvent(
+      new MessageEvent("message", {
+        source: target,
+        data: { source: "dbx-plugin", version: 1, type: "request", id: "t-set", method: "host.setTitle", params: { title: "Custom Title" } },
+      }),
+    );
+    await vi.waitFor(() => expect(mocks.setPluginWorkbenchTabTitle).toHaveBeenCalledWith("tab-test-1", "Custom Title"));
+
+    // Send host.getTitle from the iframe
+    window.dispatchEvent(
+      new MessageEvent("message", {
+        source: target,
+        data: { source: "dbx-plugin", version: 1, type: "request", id: "t-get", method: "host.getTitle" },
+      }),
+    );
+    await vi.waitFor(() => expect(mocks.getPluginWorkbenchTabTitle).toHaveBeenCalledWith("tab-test-1"));
+  });
 });
 
 // Restored-tab self-heal (dbx-plugin-ssh#144): a page refresh used to park the

apps/desktop/src/components/plugins/PluginWorkbenchTab.vue

@@ -12,6 +12,7 @@ import { useI18n } from "vue-i18n";
 import { useConnectionStore } from "@/stores/connectionStore";
 
 const props = defineProps<{
+  tabId?: string;
   pluginId: string;
   contributionId: string;
   connectionId?: string;
@@ -144,6 +145,19 @@ function openFilesystem(pluginId: string, providerId: string, context?: PluginWo
   });
 }
 
+function onSetTitle(title: string | null) {
+  if (props.tabId) {
+    queryStore.setPluginWorkbenchTabTitle(props.tabId, title);
+  }
+}
+
+function onGetTitle(): string {
+  if (props.tabId) {
+    return queryStore.getPluginWorkbenchTabTitle(props.tabId) ?? "";
+  }
+  return "";
+}
+
 onMounted(start);
 watch(() => [props.pluginId, props.contributionId, props.connectionId, props.context?.connectionId], start);
 
@@ -158,6 +172,18 @@ defineExpose({ refresh });
       <AlertTriangle class="mt-0.5 size-4 shrink-0" />
       <span>{{ error || t("pluginPlatform.workbenchUnavailableFallback") }}</span>
     </div>
-    <PluginWorkbenchHost v-else class="min-h-0 flex-1" :plugin="entry.plugin" :contribution="entry.contribution" :context="hostContext" @open-workbench="openWorkbench" @open-filesystem="openFilesystem" @close-tab="emit('closeTab')" @recommendations="emit('recommendations', $event)" />
+    <PluginWorkbenchHost
+      v-else
+      class="min-h-0 flex-1"
+      :plugin="entry.plugin"
+      :contribution="entry.contribution"
+      :context="hostContext"
+      :set-title="onSetTitle"
+      :get-title="onGetTitle"
+      @open-workbench="openWorkbench"
+      @open-filesystem="openFilesystem"
+      @close-tab="emit('closeTab')"
+      @recommendations="emit('recommendations', $event)"
+    />
   </div>
 </template>

apps/desktop/src/lib/plugins/pluginHostBridge.spec.ts

@@ -528,6 +528,72 @@ describe("PluginHostBridge", () => {
     expect(openWorkbench).toHaveBeenNthCalledWith(2, "sample", "sample.other", undefined, { forceNew: false });
   });
 
+  it("rejects host.setTitle and host.getTitle without host.workbench permission", async () => {
+    const messages: unknown[] = [];
+    const target = { postMessage: (message: unknown) => messages.push(message) } as unknown as Window;
+    const bridge = new PluginHostBridge(plugin(), workbench, {}, () => target, {
+      invoke: vi.fn(),
+      notify: vi.fn(),
+      sendBinary: vi.fn(),
+      readAsset: vi.fn(),
+      setTitle: vi.fn(),
+      getTitle: vi.fn(),
+    });
+
+    bridge.handleWindowMessage({
+      source: target,
+      data: { source: "dbx-plugin", version: 1, type: "request", id: "t1", method: "host.setTitle", params: { title: "Custom Title" } },
+    } as MessageEvent);
+    await vi.waitFor(() => expect(messages).toHaveLength(1));
+    expect(messages[0]).toMatchObject({ id: "t1", error: "Plugin has not declared permission 'host.workbench'" });
+
+    bridge.handleWindowMessage({
+      source: target,
+      data: { source: "dbx-plugin", version: 1, type: "request", id: "t2", method: "host.getTitle" },
+    } as MessageEvent);
+    await vi.waitFor(() => expect(messages).toHaveLength(2));
+    expect(messages[1]).toMatchObject({ id: "t2", error: "Plugin has not declared permission 'host.workbench'" });
+  });
+
+  it("handles host.setTitle and host.getTitle with host.workbench permission", async () => {
+    const messages: unknown[] = [];
+    const target = { postMessage: (message: unknown) => messages.push(message) } as unknown as Window;
+    const setTitle = vi.fn();
+    const getTitle = vi.fn(() => "Current Title");
+    const bridge = new PluginHostBridge(plugin(["host.workbench"]), workbench, {}, () => target, {
+      invoke: vi.fn(),
+      notify: vi.fn(),
+      sendBinary: vi.fn(),
+      readAsset: vi.fn(),
+      setTitle,
+      getTitle,
+    });
+
+    const request = (id: string, method: string, params?: unknown) =>
+      bridge.handleWindowMessage({
+        source: target,
+        data: { source: "dbx-plugin", version: 1, type: "request", id, method, params },
+      } as MessageEvent);
+
+    request("set-1", "host.setTitle", { title: "  My Tab  " });
+    await vi.waitFor(() => expect(messages).toHaveLength(1));
+    expect(setTitle).toHaveBeenLastCalledWith("My Tab");
+    expect(messages[0]).toMatchObject({ id: "set-1", result: null });
+
+    request("set-2", "host.setTitle", { title: null });
+    await vi.waitFor(() => expect(messages).toHaveLength(2));
+    expect(setTitle).toHaveBeenLastCalledWith(null);
+
+    request("set-3", "host.setTitle", { title: "   " });
+    await vi.waitFor(() => expect(messages).toHaveLength(3));
+    expect(setTitle).toHaveBeenLastCalledWith(null);
+
+    request("get-1", "host.getTitle");
+    await vi.waitFor(() => expect(messages).toHaveLength(4));
+    expect(getTitle).toHaveBeenCalled();
+    expect(messages[3]).toMatchObject({ id: "get-1", result: "Current Title" });
+  });
+
   it("routes host.executeCommand to the surface handler scoped to the calling plugin", async () => {
     const messages: unknown[] = [];
     const target = { postMessage: (message: unknown) => messages.push(message) } as unknown as Window;
@@ -1766,6 +1832,12 @@ describe("plugin SDK source", () => {
       getPlanCapabilities: (connectionId: string) => Promise<unknown>;
       explainPlan: (request: unknown) => Promise<unknown>;
       getTableMetadata: (context: unknown) => Promise<unknown>;
+      setTitle: (title: string | null) => Promise<unknown>;
+      getTitle: () => Promise<unknown>;
+      workbench: {
+        setTitle: (title: string | null) => Promise<unknown>;
+        getTitle: () => Promise<unknown>;
+      };
     };
     receiveHostMessage: (message: unknown) => void;
   }
@@ -1919,6 +1991,29 @@ describe("plugin SDK source", () => {
     expect(request.params).toEqual({ connectionId: "c1", database: "app", table: "users" });
   });
 
+  it("exposes setTitle and getTitle on window.dbxPlugin and window.dbxPlugin.workbench", () => {
+    const posted: unknown[] = [];
+    const { dbxPlugin } = loadSdk(posted);
+
+    void dbxPlugin!.setTitle("New Tab Name");
+    void dbxPlugin!.getTitle();
+    void dbxPlugin!.workbench.setTitle(null);
+    void dbxPlugin!.workbench.getTitle();
+
+    const requests = posted.filter((message) => (message as { type: string }).type === "request") as {
+      method: string;
+      params: Record<string, unknown>;
+    }[];
+
+    expect(requests).toHaveLength(4);
+    expect(requests[0].method).toBe("host.setTitle");
+    expect(requests[0].params).toEqual({ title: "New Tab Name" });
+    expect(requests[1].method).toBe("host.getTitle");
+    expect(requests[2].method).toBe("host.setTitle");
+    expect(requests[2].params).toEqual({ title: null });
+    expect(requests[3].method).toBe("host.getTitle");
+  });
+
   it("forwards fileTransfer requests to the host api", async () => {
     const messages: unknown[] = [];
     const target = { postMessage: (message: unknown) => messages.push(message) } as unknown as Window;

apps/desktop/src/lib/plugins/pluginHostBridge.ts

@@ -178,6 +178,13 @@ export interface PluginHostBridgeApi {
   openAiConversation?(request: AiPluginConversationRequest): Promise<void>;
   setAiRecommendations?(update: PluginAiRecommendationHostUpdate): void;
   openWorkbench?(pluginId: string, contributionId: string, context?: PluginWorkbenchContext, options?: { forceNew?: boolean; target?: "tab" }): Promise<void> | void;
+  /**
+   * Updates the calling workbench tab/dock title (or resets to default when title is null).
+   * Scoped to the single surface hosting the caller.
+   */
+  setTitle?(title: string | null): Promise<void> | void;
+  /** Reads the calling workbench tab/dock title. */
+  getTitle?(): Promise<string> | string;
   /**
    * §4/§5 command execution asked from a plugin webview: the same registry
    * path as menu execution — enablement (§5.4), §4.1 singleton reuse,
@@ -514,6 +521,7 @@ export class PluginHostBridge {
         // Floating desktop widget windows: advertised only when the host can both
         // open a window and drive its geometry, so a plugin sees one honest flag.
         floating: !!this.api.openFloatingWindow && !!this.api.beginFloatingDrag && !!this.api.endFloatingDrag,
+        workbenchTitle: !!this.api.setTitle,
         // The namespace exists on both hosts, but what it can DO differs:
         // portable plugins gate on these flags instead of probing calls.
         fileTransfer: {
@@ -783,6 +791,20 @@ export class PluginHostBridge {
       await this.api.openWorkbench(this.plugin.manifest.id, requireProtocolName(input.contributionId, "workbench contribution"), isRecord(input.context) ? input.context : undefined, { forceNew: input.forceNew === true, target: input.target === "tab" ? "tab" : undefined });
       return null;
     }
+    if (method === "host.setTitle") {
+      this.requirePermission("host.workbench");
+      if (!this.api.setTitle) throw new Error("Host tab title update is unavailable");
+      const input = requireRecord(params, "setTitle params");
+      const rawTitle = input.title;
+      const title = typeof rawTitle === "string" ? rawTitle.trim().slice(0, 256) || null : null;
+      await this.api.setTitle(title);
+      return null;
+    }
+    if (method === "host.getTitle") {
+      this.requirePermission("host.workbench");
+      if (!this.api.getTitle) throw new Error("Host tab title read is unavailable");
+      return (await this.api.getTitle()) ?? "";
+    }
     if (method === "host.executeCommand") {
       this.requirePermission("host.workbench");
       if (!this.api.executeCommand) throw new Error("Host command execution is unavailable");
@@ -1417,6 +1439,8 @@ export function pluginSdkSource(initialTheme?: PluginBridgeTheme): string {
         return URL.createObjectURL(new Blob([decode(asset.dataBase64)], { type: asset.contentType }));
       },
       openWorkbench: (contributionId, childContext, options) => request('host.openWorkbench', { contributionId, context: childContext, forceNew: !!(options && options.forceNew), target: options && options.target === "tab" ? "tab" : undefined }),
+      setTitle: (title) => request('host.setTitle', { title }),
+      getTitle: () => request('host.getTitle'),
       // Closes whatever surface hosts this plugin UI — a workbench tab, a dock
       // entry, or this plugin's floating window. Same path as the Ctrl+W
       // shortcut, so a plugin can offer its own close/minimize affordance.
@@ -1531,6 +1555,8 @@ export function pluginSdkSource(initialTheme?: PluginBridgeTheme): string {
       // listener has settled. The host bounds the wait on its side.
       workbench: Object.freeze({
         onClose: (listener) => { listeners.close.add(listener); return () => listeners.close.delete(listener); },
+        setTitle: (title) => request('host.setTitle', { title }),
+        getTitle: () => request('host.getTitle'),
       }),
       decodeBase64: decode,
       encodeBase64: encode,

apps/desktop/src/stores/__tests__/queryStore.openPluginWorkbench.spec.ts

@@ -275,4 +275,42 @@ describe("queryStore localizePluginTabTitles", () => {
     expect(titles[freeId]).toBe("文件");
     expect(titles[boundId]).toBe("prod-server · SFTP");
   });
+
+  it("allows plugin workbench tabs to set and get custom titles independently and reset with null", () => {
+    const queryStore = useQueryStore();
+
+    const firstId = queryStore.openPluginWorkbench("io.dbx.viewer", "file-view", { title: "File View", forceNew: true });
+    const secondId = queryStore.openPluginWorkbench("io.dbx.viewer", "file-view", { title: "File View", forceNew: true });
+
+    expect(queryStore.getPluginWorkbenchTabTitle(firstId)).toBe("File View");
+    expect(queryStore.getPluginWorkbenchTabTitle(secondId)).toBe("File View (1)");
+
+    // Modify title on the first tab
+    const updatedFirst = queryStore.setPluginWorkbenchTabTitle(firstId, "config.yaml");
+    expect(updatedFirst).toBe(true);
+    expect(queryStore.getPluginWorkbenchTabTitle(firstId)).toBe("config.yaml");
+    // Second tab remains unchanged
+    expect(queryStore.getPluginWorkbenchTabTitle(secondId)).toBe("File View (1)");
+    const firstTab = queryStore.tabs.find((t) => t.id === firstId);
+    expect(firstTab?.customTitle).toBe(true);
+
+    // Modify title on the second tab
+    const updatedSecond = queryStore.setPluginWorkbenchTabTitle(secondId, "schema.json");
+    expect(updatedSecond).toBe(true);
+    expect(queryStore.getPluginWorkbenchTabTitle(secondId)).toBe("schema.json");
+    expect(queryStore.getPluginWorkbenchTabTitle(firstId)).toBe("config.yaml");
+
+    // Reset first tab to default by passing null
+    queryStore.setPluginWorkbenchTabTitle(firstId, null);
+    expect(queryStore.getPluginWorkbenchTabTitle(firstId)).toBe("File View");
+    expect(firstTab?.customTitle).toBe(false);
+
+    // Reset second tab with empty string
+    queryStore.setPluginWorkbenchTabTitle(secondId, "   ");
+    expect(queryStore.getPluginWorkbenchTabTitle(secondId)).toBe("File View (1)");
+
+    // Non-existent or non-workbench tab returns false/undefined
+    expect(queryStore.setPluginWorkbenchTabTitle("non-existent", "title")).toBe(false);
+    expect(queryStore.getPluginWorkbenchTabTitle("non-existent")).toBeUndefined();
+  });
 });

apps/desktop/src/stores/queryStore.ts

@@ -4118,10 +4118,11 @@ export const useQueryStore = defineStore("query", () => {
         return suffix ? Math.max(highest, Number(suffix[1])) : highest;
       }, 0) + 1;
     const baseTitle = options.title || contributionId;
+    const title = siblingTabs.length >= 1 ? `${baseTitle} (${nextSessionNumber})` : baseTitle;
     const id = uuid();
     const tab: QueryTab = {
       id,
-      title: siblingTabs.length >= 1 ? `${baseTitle} (${nextSessionNumber})` : baseTitle,
+      title,
       connectionId,
       database: options.database || "",
       sql: "",
@@ -4133,6 +4134,7 @@ export const useQueryStore = defineStore("query", () => {
         commandId: options.commandId,
         pluginId,
         contributionId,
+        defaultTitle: title,
         context: options.context ? snapshotPluginWorkbenchContext(options.context) : undefined,
       },
     };
@@ -4161,8 +4163,31 @@ export const useQueryStore = defineStore("query", () => {
       if (!localizedTitle) continue;
       const suffix = / \((\d+)\)$/.exec(tab.title)?.[0] || "";
       tab.title = `${localizedTitle}${suffix}`;
+      if (tab.pluginWorkbench) {
+        tab.pluginWorkbench.defaultTitle = tab.title;
       }
     }
+  }
+
+  function setPluginWorkbenchTabTitle(id: string, title: string | null): boolean {
+    const tab = tabs.value.find((t) => t.id === id);
+    if (!tab || tab.mode !== "plugin-workbench" || !tab.pluginWorkbench) return false;
+    const trimmed = typeof title === "string" ? title.trim().slice(0, 256) : "";
+    if (trimmed) {
+      tab.title = trimmed;
+      tab.customTitle = true;
+    } else {
+      tab.title = tab.pluginWorkbench.defaultTitle || tab.pluginWorkbench.contributionId;
+      tab.customTitle = false;
+    }
+    return true;
+  }
+
+  function getPluginWorkbenchTabTitle(id: string): string | undefined {
+    const tab = tabs.value.find((t) => t.id === id);
+    if (!tab || tab.mode !== "plugin-workbench") return undefined;
+    return tab.title;
+  }
 
   function openPluginFilesystem(pluginId: string, providerId: string, options: { title?: string; connectionId?: string; rootUri?: string; currentUri?: string; forceNew?: boolean } = {}) {
     if (!options.forceNew) {
@@ -10722,6 +10747,8 @@ export const useQueryStore = defineStore("query", () => {
     openMqttAdmin,
     openNacosAdmin,
     openPluginWorkbench,
+    setPluginWorkbenchTabTitle,
+    getPluginWorkbenchTabTitle,
     pluginWorkbenchTitles,
     localizePluginTabTitles,
     openPluginFilesystem,

apps/desktop/src/types/database.ts

@@ -2309,6 +2309,7 @@ export interface QueryTab {
     commandId?: string;
     pluginId: string;
     contributionId: string;
+    defaultTitle?: string;
     context?: Record<string, unknown>;
   };
   pluginFilesystem?: {

docs/content/docs/plugin-development.cn.mdx

@@ -5,9 +5,7 @@ description: 从 CLI、Manifest、Workbench 和 Sidecar 开始开发 DBX 插件
 
 DBX 插件是独立安装的 `.dbxp` 包，可以提供连接类型、工作台、文件系统和原生 Sidecar。插件源码、DBX 插件框架和官方商店目录由不同仓库负责。
 
-<Callout type="info">
-  **推荐路径：** 使用 `dbx-plugin create` 创建项目，在自己的仓库开发并发布未签名候选包；`dbx-store` 会为已注册的插件自动创建或更新候选 PR，维护者审核并签名后才会进入官方目录。
-</Callout>
+<Callout type="info">**推荐路径：** 使用 `dbx-plugin create` 创建项目，在自己的仓库开发并发布未签名候选包；`dbx-store` 会为已注册的插件自动创建或更新候选 PR，维护者审核并签名后才会进入官方目录。</Callout>
 
 <Callout type="warn">
   **插件上架 Pull Request 提交到 [`t8y2/dbx-store`](https://github.com/t8y2/dbx-store)，不是 `t8y2/dbx`。** 插件自己的功能代码通常保留在开发者自己的源码仓库；只有修改 DBX Host、SDK、CLI、协议、Schema、文档或官方示例时，才向 [`t8y2/dbx`](https://github.com/t8y2/dbx) 提交 PR。
@@ -34,7 +32,7 @@ DBX 插件是独立安装的 `.dbxp` 包，可以提供连接类型、工作台
 ## 应该提交到哪个仓库
 
 | 你要修改的内容                                                 | 提交位置                                              | 是否向 DBX 官方提 PR                    |
-| --- | --- | --- |
+| -------------------------------------------------------------- | ----------------------------------------------------- | --------------------------------------- |
 | 你的插件前端、Rust/Go 后端、测试和发布脚本                     | 插件自己的源码仓库                                    | 不向 `dbx` 提交；在自己的仓库开发和发布 |
 | 新插件上架、版本更新、商店图标和介绍                           | [`t8y2/dbx-store`](https://github.com/t8y2/dbx-store) | 是，目标分支为 `main`                   |
 | DBX 插件 Host、Manifest/Marketplace Schema、SDK、CLI、Packager | [`t8y2/dbx`](https://github.com/t8y2/dbx)             | 是，目标分支为 `main`                   |
@@ -84,16 +82,14 @@ my-plugin/
   "engines": { "host_api": "1" },
   "permissions": [],
   "entrypoints": { "ui": { "root": "ui", "entry": "ui/index.html" } },
-  "contributions": [
-    { "type": "workbench", "id": "com.example.files.main", "label": "Files", "icon": "assets/plugin.svg" }
-  ]
+  "contributions": [{ "type": "workbench", "id": "com.example.files.main", "label": "Files", "icon": "assets/plugin.svg" }]
 }
 ```
 
 Manifest 中的路径相对于包根目录，不能以 `/` 开头、不能包含 `..`、反斜杠或重复斜杠。`ui.entry` 必须位于 `ui.root` 内：当 root 为 `ui` 时，入口写 `ui/index.html`，不是 `index.html`。`signingKeyId` 属于商店 artifact metadata，不是 Manifest 字段。
 
 | 字段               | 必需 | 说明                                                                                                 |
-| --- | --- | --- |
+| ------------------ | ---- | ---------------------------------------------------------------------------------------------------- |
 | `$schema`          | 否   | 编辑器使用的 JSON Schema 地址，不参与身份校验。                                                      |
 | `manifest_version` | 是   | 当前必须为数字 `1`。                                                                                 |
 | `id`               | 是   | 全局稳定 ID，只能使用小写字母、数字、`.`, `_`, `-`，例如 `io.github.example.files`；发布后不要更改。 |
@@ -168,14 +164,21 @@ Manifest 中的路径相对于包根目录，不能以 `/` 开头、不能包含
     { "key": "display_name", "label": "Name", "type": "text", "binding": "name", "required": true },
     { "key": "endpoint", "label": "Endpoint", "type": "text", "binding": "host", "required": true },
     { "key": "port", "label": "Port", "type": "number", "binding": "port", "default": 443 },
-    { "key": "region", "label": "Region", "type": "radio", "options": [{ "label": "US", "value": "us" }, { "label": "EU", "value": "eu" }], "binding": "config" },
+    {
+      "key": "region",
+      "label": "Region",
+      "type": "radio",
+      "options": [
+        { "label": "US", "value": "us" },
+        { "label": "EU", "value": "eu" }
+      ],
+      "binding": "config"
+    },
     { "key": "token", "label": "Access token", "type": "password", "binding": "secret", "required": true }
   ],
   "workbench": "com.example.files.main",
   "capabilities": ["test", "connect", "disconnect"],
-  "actions": [
-    { "id": "refresh", "label": "Refresh metadata", "variant": "outline", "when": "edit", "requires_valid_form": true, "timeout_ms": 30000 }
-  ]
+  "actions": [{ "id": "refresh", "label": "Refresh metadata", "variant": "outline", "when": "edit", "requires_valid_form": true, "timeout_ms": 30000 }]
 }
 ```
 
@@ -237,7 +240,7 @@ Manifest 中的路径相对于包根目录，不能以 `/` 开头、不能包含
 ### 其他 Contributions
 
 | 类型                  | 必需字段                                                                | 用途                                                                                                     |
-| --- | --- | --- |
+| --------------------- | ----------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------- |
 | `workbench`           | `type`, `id`, `label`                                                   | 注册可从侧边栏或插件入口打开的工作台。                                                                   |
 | `filesystem-provider` | `type`, `id`, `label`, `schemes`                                        | 注册虚拟文件系统；`root_uri` 例如 `s3://bucket`，能力可选 `read`、`write`、`delete`、`rename`、`mkdir`。 |
 | `context-menu`        | `type`、`id`、`label`、`menu: "connection"` 或 `"table"`、可选 `action` | 向 Sidebar Tree 的连接或 table 右键菜单增加后端动作，或打开已声明的 Workbench。                          |
@@ -283,7 +286,7 @@ context-menu 也可以声明由 Host 处理的 Workbench action：
 使用 DBX 通用文件管理器时，后端实现以下方法；自定义工作台也可以自行通过 RPC 使用这些方法，但不能把声明 Contribution 当成已经实现业务逻辑。
 
 | 方法                         | 参数与返回                                                                                          |
-| --- | --- |
+| ---------------------------- | --------------------------------------------------------------------------------------------------- |
 | `filesystem/list`            | `providerId`、可选 `connectionId`、`uri`、可选 `cursor`、`limit`；返回 `{ entries, nextCursor? }`。 |
 | `filesystem/read`            | 同上身份字段、`uri`、`maxBytes`；返回 `{ dataBase64, contentType?, truncated, etag? }`。            |
 | `filesystem/write`           | `uri`、`dataBase64`、`create`、`overwrite`、可选 `etag`；需声明 `write`。                           |
@@ -301,7 +304,7 @@ context-menu 也可以声明由 Host 处理的 Workbench action：
 
 ```json
 {
-"localizations": {
+  "localizations": {
     "zh-CN": {
       "name": "示例文件",
       "contributions": {
@@ -311,7 +314,7 @@ context-menu 也可以声明由 Host 处理的 Workbench action：
         }
       }
     }
-}
+  }
 }
 ```
 
@@ -353,7 +356,7 @@ const assetUrl = await window.dbxPlugin.readAssetUrl("assets/empty-state.svg");
 ```
 
 | API                                                                          | 作用                                                                                                                                                                                                                                                                                                                                                              |
-| --- | --- |
+| ---------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | `ready`                                                                      | 等待 Host 完成初始化；应用启动逻辑放在 `await dbxPlugin.ready` 之后。                                                                                                                                                                                                                                                                                             |
 | `contributionId`                                                             | Host 打开的 contribution 的只读 identity；`await ready` 后可读取，且与 `context` 独立。                                                                                                                                                                                                                                                                           |
 | `context` / `onContext(fn)`                                                  | 读取或监听当前工作台上下文。                                                                                                                                                                                                                                                                                                                                      |
@@ -365,6 +368,8 @@ const assetUrl = await window.dbxPlugin.readAssetUrl("assets/empty-state.svg");
 | `sendBinary(channel, data)` / `onBinary(fn)`                                 | 发送或接收二进制数据；需要 `stdio-framed` 和 `host.binary`。                                                                                                                                                                                                                                                                                                      |
 | `readAsset(path)` / `readAssetUrl(path)`                                     | 读取包内资源；路径不能越出插件资源根目录。                                                                                                                                                                                                                                                                                                                        |
 | `openWorkbench(id, context)`                                                 | 打开本插件的另一个工作台；需要 `host.workbench`。                                                                                                                                                                                                                                                                                                                 |
+| `setTitle(title)`                                                            | 修改当前工作台页签标题（传入 `null` 恢复默认）；需要 `host.workbench`。                                                                                                                                                                                                                                                                                           |
+| `getTitle()`                                                                 | 读取当前工作台页签标题；需要 `host.workbench`。                                                                                                                                                                                                                                                                                                                   |
 | `closeWorkbench()`                                                           | 关闭承载当前 UI 的表面——工作台标签、dock 面板条目，或本插件的浮动窗口。与 `Ctrl/Cmd+W` 快捷键走同一条路径，因此插件可以提供自己的关闭或最小化按钮。                                                                                                                                                                                                               |
 | `executeCommand(commandId, context?)`                                        | 执行本插件自己声明的命令，与菜单执行完全同径——重新检查 `enablement`、按单例复用，并遵循声明的 `presentation`（panel 停靠底部面板，tab 打开工作台标签页）。`context` 合并到命令上下文之上，并解析 `instance_key` 的 `{{path}}` 占位符（如 `instance_key: "logs:{{connectionId}}"` 即每个连接一个面板实例）。预期结果通过 `{ error }` 返回；需要 `host.workbench`。 |
 | `openFilesystem(id, context)`                                                | 打开本插件的文件系统入口；需要 `host.filesystem`。                                                                                                                                                                                                                                                                                                                |
@@ -372,7 +377,7 @@ const assetUrl = await window.dbxPlugin.readAssetUrl("assets/empty-state.svg");
 | `explainPlan({ connectionId, database?, schema?, sql, mode, timeoutMs? })`   | 返回 `sql` 的估算执行计划；需要 `host.plans:read`。                                                                                                                                                                                                                                                                                                               |
 | `getTableMetadata({ connectionId, database?, schema?, table })`              | 读取已打开连接的窄化 table schema metadata；需要 `host.schema:read`。                                                                                                                                                                                                                                                                                             |
 | `queryData({ connectionId, database?, schema?, sql, maxRows?, timeoutMs? })` | 在用户授权给插件的连接上执行一条只读 SQL；需要 `host.data:read`。                                                                                                                                                                                                                                                                                                 |
-| `capabilities` | 来自 init 消息的 `{ downloadFile, planApi, schemaMetadataApi, dataApi, storage, ai, aiRecommendations, clipboardWrite, clipboardRead, floating }`。字段缺失或为 `false` 表示当前宿主不支持该组 Host API，应据此关闭功能而不是用真实请求试探。 |
+| `capabilities`                                                               | 来自 init 消息的 `{ downloadFile, planApi, schemaMetadataApi, dataApi, storage, ai, aiRecommendations, clipboardWrite, clipboardRead, floating, workbenchTitle }`。字段缺失或为 `false` 表示当前宿主不支持该组 Host API，应据此关闭功能而不是用真实请求试探。                                                                                                     |
 | `ai.openConversation({ title, prompt, context, send?, mode? })`              | 在内置 AI 面板新建插件对话；`send` 默认 `false`，`mode` 默认 `ask`。`mode: "agent"` 会在 context 包含已打开插件连接时使用实时插件工具；需要 `host.ai`，并以 `capabilities.ai` 广播。                                                                                                                                                                              |
 | `ai.setRecommendations({ context, items })`                                  | 覆盖当前工作台的默认推荐问题并立即刷新全局 AI 面板；每次最多 5 条，支持 `{{path.to.value}}` 占位符；需要 `host.ai` 和 `capabilities.aiRecommendations`。                                                                                                                                                                                                          |
 | `ai.clearRecommendations()`                                                  | 清空当前工作台的推荐问题；需要 `host.ai` 和 `capabilities.aiRecommendations`。                                                                                                                                                                                                                                                                                    |
@@ -446,7 +451,7 @@ if (window.dbxPlugin.capabilities.schemaMetadataApi) {
     connectionId,
     database,
     schema,
-    table: "users"
+    table: "users",
   });
   for (const column of metadata.columns) {
     renderColumn(column.name, column.dataType, column.nullable);
@@ -500,7 +505,7 @@ if (window.dbxPlugin.capabilities.dataApi) {
     connectionId,
     database,
     sql: "SELECT status, count(*) AS total FROM orders GROUP BY status",
-    maxRows: 200
+    maxRows: 200,
   });
   renderChart(result.columns, result.rows);
 }
@@ -511,8 +516,14 @@ if (window.dbxPlugin.capabilities.dataApi) {
 ```json
 {
   "dbType": "postgres",
-  "columns": [{ "name": "status", "dataType": "text" }, { "name": "total", "dataType": "int8" }],
-  "rows": [["paid", 1204], ["refunded", 37]],
+  "columns": [
+    { "name": "status", "dataType": "text" },
+    { "name": "total", "dataType": "int8" }
+  ],
+  "rows": [
+    ["paid", 1204],
+    ["refunded", 37]
+  ],
   "truncated": false,
   "elapsedMs": 12
 }
@@ -616,7 +627,7 @@ const offDrag = fileTransfer.onDragState((active) => showDropOverlay(active));
 ```
 
 | API                                        | 用途                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
-| --- | --- |
+| ------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
 | `pick({ multiple })`                       | 原生打开对话框；返回已打开的读句柄 `{ handleId, name, size, contentType }`。                                                                                                                                                                                                                                                                                                                                                                                 |
 | `read(handleId, offset, length?)`          | 从读句柄流式读取一个分块 `{ dataBase64, length, eof }`。                                                                                                                                                                                                                                                                                                                                                                                                     |
 | `beginSave({ name, contentType?, size? })` | 原生保存对话框 + 写句柄；返回 `{ handleId, chunkBytes }`，用户取消时为 `null`。                                                                                                                                                                                                                                                                                                                                                                              |
@@ -641,7 +652,7 @@ if (window.dbxPlugin.capabilities.storage) {
 ```
 
 | API               | 用途                                                |
-| --- | --- |
+| ----------------- | --------------------------------------------------- |
 | `get(key)`        | 返回存储的 JSON 值；键未设置时返回 `null`。         |
 | `set(key, value)` | 持久化任意 JSON 值（`undefined` 归一化为 `null`）。 |
 | `delete(key)`     | 删除一个键；删除不存在的键同样成功。                |
@@ -764,7 +775,7 @@ grip.addEventListener("pointerup", async () => {
 ```
 
 | API                               | 作用                                                                                                                                                                                                                                                                                                                                               |
-| --- | --- |
+| --------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | `floating.open(options)`          | 为本插件的某个 `workbench` contribution 打开（或前置）浮动窗口。`options`：`contributionId`（必填）、`title`、逻辑像素的 `width`/`height`、物理屏幕像素的 `x`/`y`、`alwaysOnTop`（默认 `true`）、`skipTaskbar`（默认 `true`）、`resizable`（默认 `false`）、`context`。返回 `{ windowId, reused }`；需要 `host.workbench`。                        |
 | `floating.close(contributionId?)` | 关闭本插件的浮动窗口——指定某个 contribution，或省略 id 关闭本插件的全部浮动窗口。在小组件内部不带参数调用即关闭自己。                                                                                                                                                                                                                              |
 | `floating.beginDrag()`            | 把窗口交给宿主的拖动循环。在 `pointermove` 里、自己的拖动阈值越过之后调用（此时按键还按住）。之后由宿主自己读原生光标，插件没有逐帧调用要做。                                                                                                                                                                                                      |
@@ -805,7 +816,7 @@ button {
 env 消息的 `theme` 结构为 `{ appearance, tokens, editor? }`。`appearance` 是 `"light" | "dark"`；`tokens` 是按前缀扫取的根节点设计变量（`--color-*`、`--radius-*`、`--font-*`）；`editor` 是无 CSS 令牌载体的 SQL 编辑器设置结构化快照。投递矩阵：
 
 | DBX 设置                            | 投递形式                                        |
-| --- | --- |
+| ----------------------------------- | ----------------------------------------------- |
 | 浅色/深色/跟随系统                  | `theme.appearance`                              |
 | 调色板 + 自定义配色                 | `--color-*` tokens                              |
 | 圆角风格                            | `--radius-*` tokens                             |
@@ -1075,12 +1086,14 @@ candidates/<plugin-id>.json
   "name": "Example Files",
   "source": "https://github.com/example/dbx-plugin-files/tree/v0.1.0",
   "license": "Apache-2.0",
-  "targets": [{
+  "targets": [
+    {
       "target": "universal",
       "url": "https://github.com/example/dbx-plugin-files/releases/download/v0.1.0/com.example.files-0.1.0-universal.dbxp",
       "sha256": "<64 位十六进制 SHA-256>",
       "size": 123456
-  }]
+    }
+  ]
 }
 ```
 

docs/content/docs/plugin-development.mdx

@@ -10,7 +10,8 @@ DBX plugins are independently installed `.dbxp` packages that can contribute con
 </Callout>
 
 <Callout type="warn">
-  **Marketplace listing pull requests go to [`t8y2/dbx-store`](https://github.com/t8y2/dbx-store), not `t8y2/dbx`.** A plugin's feature code normally remains in its author's source repository. Open a PR against [`t8y2/dbx`](https://github.com/t8y2/dbx) only when changing the DBX host, SDK, CLI, protocol, schemas, documentation, or official examples.
+  **Marketplace listing pull requests go to [`t8y2/dbx-store`](https://github.com/t8y2/dbx-store), not `t8y2/dbx`.** A plugin's feature code normally remains in its author's source repository. Open a PR against [`t8y2/dbx`](https://github.com/t8y2/dbx) only when changing the DBX host, SDK, CLI,
+  protocol, schemas, documentation, or official examples.
 </Callout>
 
 ## Plugin Shortcuts
@@ -34,7 +35,7 @@ Position affects icons only: content retains its existing `panel/tab` presentati
 ## Which Repository Receives the Change
 
 | Change                                                               | Destination                                           | Official DBX PR?                                                        |
-| --- | --- | --- |
+| -------------------------------------------------------------------- | ----------------------------------------------------- | ----------------------------------------------------------------------- |
 | Your plugin frontend, Rust/Go backend, tests, and release scripts    | The plugin's source repository                        | Do not submit it to `dbx`; develop and release it in its own repository |
 | A new Marketplace listing, version update, icon, or description      | [`t8y2/dbx-store`](https://github.com/t8y2/dbx-store) | Yes, target `main`                                                      |
 | DBX plugin host, Manifest/Marketplace schemas, SDK, CLI, or packager | [`t8y2/dbx`](https://github.com/t8y2/dbx)             | Yes, target `main`                                                      |
@@ -84,16 +85,14 @@ my-plugin/
   "engines": { "host_api": "1" },
   "permissions": [],
   "entrypoints": { "ui": { "root": "ui", "entry": "ui/index.html" } },
-  "contributions": [
-    { "type": "workbench", "id": "com.example.files.main", "label": "Files", "icon": "assets/plugin.svg" }
-  ]
+  "contributions": [{ "type": "workbench", "id": "com.example.files.main", "label": "Files", "icon": "assets/plugin.svg" }]
 }
 ```
 
 Manifest paths are relative to the package root. They cannot start with `/`, contain `..`, backslashes, or duplicate slashes. `ui.entry` must be inside `ui.root`: with root `ui`, use `ui/index.html`, not `index.html`. `signingKeyId` belongs to Marketplace artifact metadata, not the Manifest.
 
 | Field              | Required | Meaning                                                                                                                                      |
-| --- | --- | --- |
+| ------------------ | -------- | -------------------------------------------------------------------------------------------------------------------------------------------- |
 | `$schema`          | No       | JSON Schema URL for editor support; it does not establish identity.                                                                          |
 | `manifest_version` | Yes      | Must currently be the number `1`.                                                                                                            |
 | `id`               | Yes      | Stable global ID using lowercase letters, digits, `.`, `_`, and `-`, such as `io.github.example.files`; never change it after publishing.    |
@@ -168,14 +167,21 @@ A connection provider declares a form; DBX renders the form and owns the connect
     { "key": "display_name", "label": "Name", "type": "text", "binding": "name", "required": true },
     { "key": "endpoint", "label": "Endpoint", "type": "text", "binding": "host", "required": true },
     { "key": "port", "label": "Port", "type": "number", "binding": "port", "default": 443 },
-    { "key": "region", "label": "Region", "type": "radio", "options": [{ "label": "US", "value": "us" }, { "label": "EU", "value": "eu" }], "binding": "config" },
+    {
+      "key": "region",
+      "label": "Region",
+      "type": "radio",
+      "options": [
+        { "label": "US", "value": "us" },
+        { "label": "EU", "value": "eu" }
+      ],
+      "binding": "config"
+    },
     { "key": "token", "label": "Access token", "type": "password", "binding": "secret", "required": true }
   ],
   "workbench": "com.example.files.main",
   "capabilities": ["test", "connect", "disconnect"],
-  "actions": [
-    { "id": "refresh", "label": "Refresh metadata", "variant": "outline", "when": "edit", "requires_valid_form": true, "timeout_ms": 30000 }
-  ]
+  "actions": [{ "id": "refresh", "label": "Refresh metadata", "variant": "outline", "when": "edit", "requires_valid_form": true, "timeout_ms": 30000 }]
 }
 ```
 
@@ -237,7 +243,7 @@ Action `when` accepts `always`, `create`, or `edit`; `variant` accepts `default`
 ### Other Contributions
 
 | Type                  | Required fields                                                             | Purpose                                                                                                                                       |
-| --- | --- | --- |
+| --------------------- | --------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------- |
 | `workbench`           | `type`, `id`, `label`                                                       | Registers a workbench opened from the sidebar or plugin entry.                                                                                |
 | `filesystem-provider` | `type`, `id`, `label`, `schemes`                                            | Registers a virtual filesystem; `root_uri` can be `s3://bucket`, with optional `read`, `write`, `delete`, `rename`, and `mkdir` capabilities. |
 | `context-menu`        | `type`, `id`, `label`, `menu: "connection"` or `"table"`, optional `action` | Adds a backend action or opens a declared Workbench from a Sidebar Tree context menu.                                                         |
@@ -283,7 +289,7 @@ Choose `workbench` for a custom file browser: the plugin owns its list, virtuali
 Implement these backend methods when using the DBX generic file manager. A custom workbench can use them through its own RPC calls as well; declaring a contribution does not implement business logic.
 
 | Method                       | Parameters and return values                                                                                  |
-| --- | --- |
+| ---------------------------- | ------------------------------------------------------------------------------------------------------------- |
 | `filesystem/list`            | `providerId`, optional `connectionId`, `uri`, optional `cursor`, `limit`; returns `{ entries, nextCursor? }`. |
 | `filesystem/read`            | The same identity fields, `uri`, `maxBytes`; returns `{ dataBase64, contentType?, truncated, etag? }`.        |
 | `filesystem/write`           | `uri`, `dataBase64`, `create`, `overwrite`, optional `etag`; requires `write`.                                |
@@ -301,7 +307,7 @@ Use locale keys such as `zh-CN` and `en` in `localizations`. You can override th
 
 ```json
 {
-"localizations": {
+  "localizations": {
     "zh-CN": {
       "name": "示例文件",
       "contributions": {
@@ -311,7 +317,7 @@ Use locale keys such as `zh-CN` and `en` in `localizations`. You can override th
         }
       }
     }
-}
+  }
 }
 ```
 
@@ -353,7 +359,7 @@ const assetUrl = await window.dbxPlugin.readAssetUrl("assets/empty-state.svg");
 ```
 
 | API                                                                          | Purpose                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
-| --- | --- |
+| ---------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
 | `ready`                                                                      | Waits for Host initialization; start application logic after `await dbxPlugin.ready`.                                                                                                                                                                                                                                                                                                                                                                                                            |
 | `contributionId`                                                             | Read-only identity of the contribution opened by the Host; available after `await ready` and independent of `context`.                                                                                                                                                                                                                                                                                                                                                                           |
 | `context` / `onContext(fn)`                                                  | Reads or observes the current workbench context.                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
@@ -365,6 +371,8 @@ const assetUrl = await window.dbxPlugin.readAssetUrl("assets/empty-state.svg");
 | `sendBinary(channel, data)` / `onBinary(fn)`                                 | Sends or receives binary data; requires framed transport and `host.binary`.                                                                                                                                                                                                                                                                                                                                                                                                                      |
 | `readAsset(path)` / `readAssetUrl(path)`                                     | Reads a packaged asset within the plugin resource root.                                                                                                                                                                                                                                                                                                                                                                                                                                          |
 | `openWorkbench(id, context)`                                                 | Opens another workbench from this plugin; requires `host.workbench`.                                                                                                                                                                                                                                                                                                                                                                                                                             |
+| `setTitle(title)`                                                            | Updates the current workbench tab title (pass `null` to reset to default); requires `host.workbench`.                                                                                                                                                                                                                                                                                                                                                                                            |
+| `getTitle()`                                                                 | Reads the current workbench tab title; requires `host.workbench`.                                                                                                                                                                                                                                                                                                                                                                                                                                |
 | `closeWorkbench()`                                                           | Closes the surface hosting this UI — a workbench tab, a dock entry, or this plugin's floating window. It is the same path as the `Ctrl/Cmd+W` shortcut, so a plugin can offer its own close or minimize affordance.                                                                                                                                                                                                                                                                              |
 | `executeCommand(commandId, context?)`                                        | Executes one of this plugin's own declared commands through the same path as a menu placement — re-checks `enablement`, applies singleton reuse, and follows the declared `presentation` (panel commands dock, tab commands open tabs). `context` merges over the command context and scopes `instance_key` `{{path}}` placeholders, so `instance_key: "logs:{{connectionId}}"` yields one panel instance per connection. Resolves `{ error }` for expected outcomes; requires `host.workbench`. |
 | `openFilesystem(id, context)`                                                | Opens a filesystem entry; requires `host.filesystem`.                                                                                                                                                                                                                                                                                                                                                                                                                                            |
@@ -372,7 +380,7 @@ const assetUrl = await window.dbxPlugin.readAssetUrl("assets/empty-state.svg");
 | `explainPlan({ connectionId, database?, schema?, sql, mode, timeoutMs? })`   | Returns the estimated plan for `sql`; requires `host.plans:read`.                                                                                                                                                                                                                                                                                                                                                                                                                                |
 | `getTableMetadata({ connectionId, database?, schema?, table })`              | Reads narrow table schema metadata from an already-open connection; requires `host.schema:read`.                                                                                                                                                                                                                                                                                                                                                                                                 |
 | `queryData({ connectionId, database?, schema?, sql, maxRows?, timeoutMs? })` | Runs one read-only SQL statement on a connection the user granted to the plugin; requires `host.data:read`.                                                                                                                                                                                                                                                                                                                                                                                      |
-| `capabilities` | `{ downloadFile, planApi, schemaMetadataApi, dataApi, storage, ai, aiRecommendations, clipboardWrite, clipboardRead, floating }` from the init message. A missing or `false` entry means that Host API group is unavailable here, so gate the matching call on it instead of probing with a request. |
+| `capabilities`                                                               | `{ downloadFile, planApi, schemaMetadataApi, dataApi, storage, ai, aiRecommendations, clipboardWrite, clipboardRead, floating, workbenchTitle }` from the init message. A missing or `false` entry means that Host API group is unavailable here, so gate the matching call on it instead of probing with a request.                                                                                                                                                                             |
 | `ai.openConversation({ title, prompt, context, send?, mode? })`              | Opens a new plugin conversation in the built-in AI panel; `send` defaults to `false` and `mode` defaults to `ask`. `mode: "agent"` uses live plugin tools when context includes an open plugin connection; requires `host.ai` and is advertised as `capabilities.ai`.                                                                                                                                                                                                                            |
 | `ai.setRecommendations({ context, items })`                                  | Replaces the current workbench's default recommendations and refreshes the global AI panel; up to five items are shown and `{{path.to.value}}` placeholders are supported; requires `host.ai` and `capabilities.aiRecommendations`.                                                                                                                                                                                                                                                              |
 | `ai.clearRecommendations()`                                                  | Clears recommendations for the current workbench; requires `host.ai` and `capabilities.aiRecommendations`.                                                                                                                                                                                                                                                                                                                                                                                       |
@@ -446,7 +454,7 @@ if (window.dbxPlugin.capabilities.schemaMetadataApi) {
     connectionId,
     database,
     schema,
-    table: "users"
+    table: "users",
   });
   for (const column of metadata.columns) {
     renderColumn(column.name, column.dataType, column.nullable);
@@ -500,7 +508,7 @@ if (window.dbxPlugin.capabilities.dataApi) {
     connectionId,
     database,
     sql: "SELECT status, count(*) AS total FROM orders GROUP BY status",
-    maxRows: 200
+    maxRows: 200,
   });
   renderChart(result.columns, result.rows);
 }
@@ -511,8 +519,14 @@ if (window.dbxPlugin.capabilities.dataApi) {
 ```json
 {
   "dbType": "postgres",
-  "columns": [{ "name": "status", "dataType": "text" }, { "name": "total", "dataType": "int8" }],
-  "rows": [["paid", 1204], ["refunded", 37]],
+  "columns": [
+    { "name": "status", "dataType": "text" },
+    { "name": "total", "dataType": "int8" }
+  ],
+  "rows": [
+    ["paid", 1204],
+    ["refunded", 37]
+  ],
   "truncated": false,
   "elapsedMs": 12
 }
@@ -616,7 +630,7 @@ const offDrag = fileTransfer.onDragState((active) => showDropOverlay(active));
 ```
 
 | API                                        | Purpose                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
-| --- | --- |
+| ------------------------------------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | `pick({ multiple })`                       | Native open dialog; resolves opened read handles `{ handleId, name, size, contentType }`.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
 | `read(handleId, offset, length?)`          | Streams a chunk `{ dataBase64, length, eof }` from a read handle.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
 | `beginSave({ name, contentType?, size? })` | Native save dialog + write handle; resolves `{ handleId, chunkBytes }`, or `null` when the user cancels.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
@@ -641,7 +655,7 @@ if (window.dbxPlugin.capabilities.storage) {
 ```
 
 | API               | Purpose                                                          |
-| --- | --- |
+| ----------------- | ---------------------------------------------------------------- |
 | `get(key)`        | Resolves the stored JSON value, or `null` when the key is unset. |
 | `set(key, value)` | Persists any JSON value (`undefined` normalizes to `null`).      |
 | `delete(key)`     | Removes one key; deleting an unset key succeeds.                 |
@@ -764,14 +778,14 @@ grip.addEventListener("pointerup", async () => {
 ```
 
 | API                               | Purpose                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
-| --- | --- |
+| --------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | `floating.open(options)`          | Opens (or focuses) the floating window for one of this plugin's `workbench` contributions. `options`: `contributionId` (required), `title`, `width`/`height` in logical pixels, `x`/`y` in physical screen pixels, `alwaysOnTop` (default `true`), `skipTaskbar` (default `true`), `resizable` (default `false`), `context`. Resolves `{ windowId, reused }`; requires `host.workbench`.                                                                                                                                                       |
 | `floating.close(contributionId?)` | Closes this plugin's floating window — one contribution, or every floating window of this plugin when the id is omitted. Inside a widget, calling it without an argument closes the widget itself.                                                                                                                                                                                                                                                                                                                                             |
 | `floating.beginDrag()`            | Hands the window to the host's drag loop. Call it from `pointermove` once your drag threshold trips, while the button is still down. The host reads the native cursor itself from here on, so there is no per-move call to make.                                                                                                                                                                                                                                                                                                               |
 | `floating.endDrag({ snap? })`     | Ends the drag. With `snap` (default `true`) the host pulls the window flush onto a work-area edge it reached or passed — docking it there, capsule first and tucked behind a thin strip once the cursor has been away — or clamps it fully on screen otherwise, and remembers the position (and the dock) for the next open. Resolves the final rect in physical pixels. Optional in practice: the host also ends a drag on its own once the cursor goes quiet, so a widget that never sees the pointerup cannot leave the window glued to it. |
 | `floating.setSize(width, height)` | Resizes the hosting window in logical pixels; the host clamps to its own bounds.                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
 
-The widget decides *when* a drag starts (which element is a grip, how far the pointer must travel first); the host moves the window and owns the snap and the remembered position. There is deliberately no per-move bridge call: the host polls the native cursor, which keeps the widget under the pointer even when the webview is busy, and ends the drag on a quiet cursor if the pointerup never arrives. Geometry calls (`beginDrag`/`endDrag`/`setSize`) only work inside a floating window and reject elsewhere, so a tab can never move a window it is not in.
+The widget decides _when_ a drag starts (which element is a grip, how far the pointer must travel first); the host moves the window and owns the snap and the remembered position. There is deliberately no per-move bridge call: the host polls the native cursor, which keeps the widget under the pointer even when the webview is busy, and ends the drag on a quiet cursor if the pointerup never arrives. Geometry calls (`beginDrag`/`endDrag`/`setSize`) only work inside a floating window and reject elsewhere, so a tab can never move a window it is not in.
 
 A few rules make the surface predictable:
 
@@ -805,7 +819,7 @@ Listen with `window.addEventListener("dbx-plugin-env", handler)` for locale/them
 The env message's `theme` is `{ appearance, tokens, editor? }`. `appearance` is `"light" | "dark"`; `tokens` are the resolved root design variables swept by prefix (`--color-*`, `--radius-*`, `--font-*`); `editor` is a structured snapshot of the SQL editor settings that have no CSS-token carrier. Delivered settings:
 
 | DBX setting                                           | Delivered as                                                             |
-| --- | --- |
+| ----------------------------------------------------- | ------------------------------------------------------------------------ |
 | Light/dark/system mode                                | `theme.appearance`                                                       |
 | Palette + custom color sets                           | `--color-*` tokens                                                       |
 | Corner style                                          | `--radius-*` tokens                                                      |
@@ -1073,12 +1087,14 @@ The candidate's essential shape is below. It references unsigned assets from the
   "name": "Example Files",
   "source": "https://github.com/example/dbx-plugin-files/tree/v0.1.0",
   "license": "Apache-2.0",
-  "targets": [{
+  "targets": [
+    {
       "target": "universal",
       "url": "https://github.com/example/dbx-plugin-files/releases/download/v0.1.0/com.example.files-0.1.0-universal.dbxp",
       "sha256": "<64 hexadecimal SHA-256 characters>",
       "size": 123456
-  }]
+    }
+  ]
 }
 ```
 

plugins/README.md

@@ -263,10 +263,7 @@ A field may declare `visible_when` and `required_when`. A leaf clause matches wh
     ]
   },
   "required_when": {
-    "all_of": [
-      { "field": "sudo_source", "one_of": ["custom"] },
-      { "not": { "field": "read_only", "one_of": [true] } }
-    ]
+    "all_of": [{ "field": "sudo_source", "one_of": ["custom"] }, { "not": { "field": "read_only", "one_of": [true] } }]
   }
 }
 ```
@@ -369,6 +366,7 @@ A workbench opens in a normal persistent DBX tab. The iframe is loaded with `san
 - `sendBinary(channel, data)` — requires `host.binary`
 - `readAsset(path)` / `readAssetUrl(path)`
 - `openWorkbench(contributionId, context)` — requires `host.workbench`
+- `setTitle(title)` / `getTitle()` — updates (pass `null` to reset) or reads the calling tab title; requires `host.workbench`
 - `executeCommand(commandId, context?)` — executes one of this plugin's own declared commands through the same path a menu placement takes: `enablement` is re-checked, `presentation: "panel"` commands dock in the bottom panel and `presentation: "tab"` (default) commands open a workbench tab, with §4.1 singleton reuse. `context` merges over the command-declared context (reserved identity fields stay host-owned) and scopes `instance_key` `{{path}}` placeholders — declare `instance_key: "logs:{{connectionId}}"` to get one panel instance per connection; a template that cannot resolve falls back to its literal. Resolves `{ error }` for expected outcomes (unknown command, enablement-blocked); requires `host.workbench`
 - `openFilesystem(providerId, context)` — requires `host.filesystem`
 - `getPlanCapabilities(connectionId)` / `explainPlan(request)` — reads an estimated execution plan for one connection; requires `host.plans:read`, see [Estimated execution plans](#estimated-execution-plans)
@@ -600,7 +598,7 @@ if (window.dbxPlugin.capabilities.schemaMetadataApi) {
     connectionId,
     database,
     schema,
-    table: "users"
+    table: "users",
   });
   renderColumns(metadata.columns);
 }
@@ -659,7 +657,7 @@ if (window.dbxPlugin.capabilities.dataApi) {
     connectionId,
     database,
     sql: "SELECT status, count(*) AS total FROM orders GROUP BY status",
-    maxRows: 200
+    maxRows: 200,
   });
 }
 ```
@@ -684,7 +682,7 @@ A plugin can read the **estimated** execution plan of a query without touching a
 ```
 
 | Request                                                                         | Purpose                                                                                                                                                                      |
-| --- | --- |
+| ------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | `host.getPlanCapabilities({ connectionId })`                                    | Reports what the host and this connection can plan. It only reads the stored connection config; it never connects or probes the server. The connection must already be open. |
 | `host.explainPlan({ connectionId, database?, schema?, sql, mode, timeoutMs? })` | Returns the estimated plan for `sql`. The connection must already be open.                                                                                                   |
 

plugins/sdk/dev-host/browser-bridge.mjs

@@ -131,6 +131,12 @@ function installBridge(channel) {
       return URL.createObjectURL(new Blob([decode(asset.dataBase64)], { type: asset.contentType }));
     },
     openWorkbench: (contributionId, context, options) => request("host.openWorkbench", { contributionId, context, forceNew: !!(options && options.forceNew) }),
+    setTitle: (title) => request("host.setTitle", { title }),
+    getTitle: () => request("host.getTitle"),
+    workbench: Object.freeze({
+      setTitle: (title) => request("host.setTitle", { title }),
+      getTitle: () => request("host.getTitle"),
+    }),
     openFilesystem: (providerId, context) => request("host.openFilesystem", { providerId, context }),
     reopenConnection: (connectionId) => request("host.reopenConnection", { connectionId }),
     getConnections: () => request("host.getConnections", {}),

plugins/sdk/dev-host/server.mjs

@@ -314,6 +314,16 @@ export async function createMockHost(options) {
         requirePermission(manifest, "host.workbench");
         return { mockHostOpenFrame: await serialize(() => openFrame(session, p.context?.connectionId || frame.connectionId, p.contributionId, p.context)) };
       }
+      case "host.setTitle": {
+        requirePermission(manifest, "host.workbench");
+        const title = p.title === null || p.title === undefined ? null : typeof p.title === "string" ? p.title.trim() || null : null;
+        frame.title = title;
+        return { ok: true, title };
+      }
+      case "host.getTitle": {
+        requirePermission(manifest, "host.workbench");
+        return frame.title ?? "";
+      }
       case "host.reopenConnection": {
         if (typeof p.connectionId !== "string" || !p.connectionId) throw new Error("connectionId is invalid");
         return { ok: true, mockReopenConnection: p.connectionId };