fix(baoyu-imagine): tighten Replicate schema validation and fallback handling

skills/baoyu-imagine/scripts/providers/replicate.test.ts

@@ -162,6 +162,7 @@ test("Replicate input builder maps Wan models to their native schema", () => {
       size: "2K",
       num_outputs: 2,
       images: ["data:image/png;base64,AAAA"],
+      thinking_mode: false,
     },
   );
 
@@ -214,6 +215,16 @@ test("Replicate validation catches unsupported Seedream and Wan argument combina
     /Seedream on Replicate requires --size to be one of 2K, 3K/,
   );
 
+  assert.throws(
+    () => validateArgs("bytedance/seedream-4.5", makeArgs({ referenceImages: Array.from({ length: 15 }, () => "ref.png") })),
+    /supports at most 14 reference images/,
+  );
+
+  assert.throws(
+    () => validateArgs("bytedance/seedream-5-lite", makeArgs({ referenceImages: Array.from({ length: 10 }, () => "ref.png"), n: 10 })),
+    /allows at most 15 total images per request/,
+  );
+
   assert.throws(
     () => validateArgs("google/nano-banana-2", makeArgs({ n: 2 })),
     /Nano Banana models on Replicate do not support --n yet/,

skills/baoyu-imagine/scripts/providers/replicate.ts

@@ -196,10 +196,8 @@ function buildWanInput(prompt: string, model: string, args: CliArgs, referenceIm
   }
 
   // thinking_mode only applies to pure text-to-image.
-  // image_set_mode is not exposed by the current CLI, so no extra check is needed here yet.
-  if (referenceImages.length === 0) {
-    input.thinking_mode = true;
-  }
+  // image_set_mode is not exposed by the current CLI, so switch only on input-image presence for now.
+  input.thinking_mode = referenceImages.length === 0;
 
   return input;
 }
@@ -216,6 +214,8 @@ export function validateArgs(model: string, args: CliArgs): void {
   }
 
   if (isSeedreamModel(model)) {
+    const referenceCount = args.referenceImages.length;
+
     if (args.size) {
       const normalizedSize = normalizePresetSize(args.size);
       if (!getAllowedSeedreamSizes(model).has(normalizedSize)) {
@@ -225,9 +225,19 @@ export function validateArgs(model: string, args: CliArgs): void {
       }
     }
 
+    if (referenceCount > 14) {
+      throw new Error("Seedream on Replicate supports at most 14 reference images per request.");
+    }
+
     if (args.n < 1 || args.n > 15) {
       throw new Error("Seedream on Replicate supports --n values from 1 to 15.");
     }
+
+    if (referenceCount + args.n > 15) {
+      throw new Error(
+        `Seedream on Replicate allows at most 15 total images per request (reference images + generated images). Received ${referenceCount} reference images and --n ${args.n}.`
+      );
+    }
   }
 
   if (isWanModel(model)) {