From 277d7bf27341eeb7fda98df1dccdfbd2f2560627 Mon Sep 17 00:00:00 2001
From: Shoubhit Dash <shoubhit2005@gmail.com>
Date: Mon, 31 Aug 2026 22:22:57 +0530
Subject: [PATCH] test(ai): reject unsupported bedrock image formats

---
 packages/ai/src/protocols/bedrock-messages.ts       |  3 ++-
 .../ai/test/provider/bedrock-messages-basic.test.ts | 13 +++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/packages/ai/src/protocols/bedrock-messages.ts b/packages/ai/src/protocols/bedrock-messages.ts
index 1f8ec61432b..8ee5f561706 100644
--- a/packages/ai/src/protocols/bedrock-messages.ts
+++ b/packages/ai/src/protocols/bedrock-messages.ts
@@ -87,7 +87,7 @@ function mediaIssue(
     return typeof block.content === "string"
       ? undefined
       : block.content.map(mediaIssue).find((issue) => issue !== undefined)
-  if (block.type !== "image" && block.type !== "document") return
+  if (block.type !== "image" && block.type !== "document") return undefined
   if (block.source.type === "url" || block.source.type === "file")
     return "Bedrock Messages does not support URL or file-ID media sources"
   if (
@@ -97,6 +97,7 @@ function mediaIssue(
     return "Bedrock Messages requires a JPEG, PNG, WebP, or GIF image"
   if (block.source.type === "base64" && Encoding.decodeBase64(block.source.data)._tag === "Failure")
     return "Bedrock Messages media data must be valid base64"
+  return undefined
 }
 
 export const route = Route.make({
diff --git a/packages/ai/test/provider/bedrock-messages-basic.test.ts b/packages/ai/test/provider/bedrock-messages-basic.test.ts
index 89e1f040c93..9777d10050e 100644
--- a/packages/ai/test/provider/bedrock-messages-basic.test.ts
+++ b/packages/ai/test/provider/bedrock-messages-basic.test.ts
@@ -151,3 +151,16 @@ it.effect("rejects Anthropic file IDs", () =>
     expect(error.message).toContain("file-ID")
   }),
 )
+
+it.effect("rejects unsupported image formats", () =>
+  Effect.gen(function* () {
+    const error = yield* compileRequest(
+      LLM.request({
+        model: AmazonBedrock.configure({ apiKey: "test" }).messages("claude"),
+        messages: [Message.user({ type: "media", mediaType: "image/svg+xml", data: "AQID" })],
+      }),
+    ).pipe(Effect.flip)
+    expect(error.reason._tag).toBe("InvalidRequest")
+    expect(error.message).toContain("JPEG, PNG, WebP, or GIF")
+  }),
+)