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fix(providers/amazon-bedrock): strip empty text content to avoid API errors #6255

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fix(providers/amazon-bedrock): strip empty text content to avoid API errors #6255

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5 changes: 5 additions & 0 deletions .changeset/cold-teachers-dream.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
'@ai-sdk/amazon-bedrock': patch
---

filter out blank text blocks
40 changes: 40 additions & 0 deletions packages/amazon-bedrock/src/convert-to-bedrock-chat-messages.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -416,6 +416,46 @@ describe('assistant messages', () => {
system: [],
});
});

it('should filter out empty text blocks in assistant messages', async () => {
const result = convertToBedrockChatMessages([
{
role: 'user',
content: [{ type: 'text', text: 'Hello' }],
},
{
role: 'assistant',
content: [
{ type: 'text', text: '\n\n' },
{
type: 'tool-call',
toolCallId: 'call-123',
toolName: 'test',
args: {},
},
{ type: 'text', text: ' ' },
{ type: 'text', text: 'actual content' },
],
},
]);

expect(result).toEqual({
messages: [
{
role: 'user',
content: [{ text: 'Hello' }],
},
{
role: 'assistant',
content: [
{ toolUse: { toolUseId: 'call-123', name: 'test', input: {} } },
{ text: 'actual content' },
],
},
],
system: [],
});
});
});

describe('tool messages', () => {
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5 changes: 5 additions & 0 deletions packages/amazon-bedrock/src/convert-to-bedrock-chat-messages.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -204,6 +204,11 @@ export function convertToBedrockChatMessages(prompt: LanguageModelV1Prompt): {

switch (part.type) {
case 'text': {
// Skip empty text blocks
if (!part.text.trim()) {
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I am making the assumption here that this is sufficient for Bedrock's definition of "blank", but it seems reasonable enough to me.

break;
}

bedrockContent.push({
text:
// trim the last text part if it's the last message in the block
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