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fix: filter empty content blocks for Bedrock provider #14586

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fix: filter empty content blocks for Bedrock provider #14586

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fe3f724
fix: filter empty content blocks for Bedrock provider
Tom-Ryder Feb 21, 2026
27922dd
fix: drop reasoning-only messages in interleaved filter
Tom-Ryder Feb 25, 2026
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52 changes: 23 additions & 29 deletions packages/opencode/src/provider/transform.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -51,7 +51,7 @@ export namespace ProviderTransform {
): ModelMessage[] {
// Anthropic rejects messages with empty content - filter out empty string messages
// and remove empty text/reasoning parts from array content
if (model.api.npm === "@ai-sdk/anthropic") {
if (model.api.npm === "@ai-sdk/anthropic" || model.api.npm === "@ai-sdk/amazon-bedrock") {
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@rekram1-node rekram1-node Mar 11, 2026

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why can't we just have this change +1 test for it, ill cleanup later cause we should be a bit better at doing this across the board but htere was a special case that caused errors in the past

msgs = msgs
.map((msg) => {
if (typeof msg.content === "string") {
Expand Down Expand Up @@ -135,37 +135,31 @@ export namespace ProviderTransform {

if (typeof model.capabilities.interleaved === "object" && model.capabilities.interleaved.field) {
const field = model.capabilities.interleaved.field
return msgs.map((msg) => {
if (msg.role === "assistant" && Array.isArray(msg.content)) {
const reasoningParts = msg.content.filter((part: any) => part.type === "reasoning")
const reasoningText = reasoningParts.map((part: any) => part.text).join("")

// Filter out reasoning parts from content
const filteredContent = msg.content.filter((part: any) => part.type !== "reasoning")

// Include reasoning_content | reasoning_details directly on the message for all assistant messages
if (reasoningText) {
return {
...msg,
content: filteredContent,
providerOptions: {
...msg.providerOptions,
openaiCompatible: {
...(msg.providerOptions as any)?.openaiCompatible,
[field]: reasoningText,
return msgs
.map((msg) => {
if (msg.role === "assistant" && Array.isArray(msg.content)) {
Comment on lines +138 to +140
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@rekram1-node rekram1-node Mar 11, 2026

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why change this unrelated stuff?

const reasoningParts = msg.content.filter((part: any) => part.type === "reasoning")
const reasoningText = reasoningParts.map((part: any) => part.text).join("")
const filteredContent = msg.content.filter((part: any) => part.type !== "reasoning")
if (filteredContent.length === 0) return undefined
if (reasoningText) {
return {
...msg,
content: filteredContent,
providerOptions: {
...msg.providerOptions,
openaiCompatible: {
...(msg.providerOptions as any)?.openaiCompatible,
[field]: reasoningText,
},
},
},
}
}
return { ...msg, content: filteredContent }
}

return {
...msg,
content: filteredContent,
}
}

return msg
})
return msg
})
.filter((msg): msg is ModelMessage => msg !== undefined)
}

return msgs
Expand Down
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