fix(plugin-sdk): gate assistant preview to progress mode

snowzlmbot · snowzlmbot · commit c5299afdaf7f · 2026-06-21T21:32:45.000+08:00
diff --git a/src/channels/streaming.ts b/src/channels/streaming.ts
@@ -816,6 +816,9 @@ export function resolveChannelProgressDraftAssistantPreview(
   entry: StreamingCompatEntry | null | undefined,
   defaultValue = false,
 ): boolean {
+  if (resolveChannelPreviewStreamMode(entry, "partial") !== "progress") {
+    return false;
+  }
   const config = getChannelStreamingConfigObject(entry);
   const progress = asObjectRecord(config?.progress);
   return asBoolean(progress?.assistantPreview) ?? defaultValue;
diff --git a/src/plugin-sdk/channel-streaming.test.ts b/src/plugin-sdk/channel-streaming.test.ts
@@ -121,7 +121,7 @@ describe("channel-streaming", () => {
     ).toBe(false);
   });
 
-  it("defaults progress assistant preview off unless explicitly enabled", () => {
+  it("enables progress assistant preview only for progress-mode drafts", () => {
     expect(resolveChannelProgressDraftAssistantPreview({ streaming: { mode: "progress" } })).toBe(
       false,
     );
@@ -130,6 +130,21 @@ describe("channel-streaming", () => {
         streaming: { mode: "progress", progress: { assistantPreview: true } },
       }),
     ).toBe(true);
+    expect(
+      resolveChannelProgressDraftAssistantPreview({
+        streaming: { mode: "partial", progress: { assistantPreview: true } },
+      }),
+    ).toBe(false);
+    expect(
+      resolveChannelProgressDraftAssistantPreview({
+        streaming: { mode: "block", progress: { assistantPreview: true } },
+      }),
+    ).toBe(false);
+    expect(
+      resolveChannelProgressDraftAssistantPreview({
+        streaming: { mode: "off", progress: { assistantPreview: true } },
+      }),
+    ).toBe(false);
   });
 
   it("falls back to legacy flat fields when the canonical object is absent", () => {
