fix: preserve multi-image prompt batches

packages/client/connection/src/client/fixture.ts

@@ -1262,6 +1262,8 @@ export function createFixtureApi(options: FixtureOptions = {}): ApiProxy {
         model: 'fx-vision',
         imageLimits: {
           maxImageBytes: 5 * 1024 * 1024,
+          maxImagesPerMessage: 10,
+          maxMessageImageBytes: 20 * 1024 * 1024,
           maxImagePixels: 40_000_000,
           mediaTypes: ['image/png', 'image/jpeg', 'image/webp', 'image/gif'],
         },

packages/client/connection/src/index.ts

@@ -52,7 +52,7 @@ export function apply(ctx: Context, config?: ConnectionConfig): void {
   for (const entry of trustedHosts) assertTrustedAuthority(entry)
   const apiHandler = toFetchHandler(ctx.apiProxy)
   const maxRequestBodyBytes = Math.ceil(
-    ctx.attachments.imageLimits.maxImageBytes * 4 / 3,
+    ctx.attachments.imageLimits.maxMessageImageBytes * 4 / 3,
   ) + REQUEST_ENVELOPE_HEADROOM_BYTES
   const route: WebRoute = {
     kind: 'prefix',

packages/client/connection/tests/node-half.spec.ts

@@ -23,7 +23,7 @@ function fakeHttpServer(routes: WebRoute[]): Pick<HttpServerService, 'register'
 
 /** Structural attachments fake: the plugin only reads imageLimits for the body cap. */
 function fakeAttachments(): AttachmentStore {
-  return { imageLimits: { maxImageBytes: 5 * 1024 * 1024 } } as AttachmentStore
+  return { imageLimits: { maxMessageImageBytes: 20 * 1024 * 1024 } } as AttachmentStore
 }
 
 /** Bodyless GET carrying the given headers (enough for the trust fence + bridge). */