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fix(ai): harden Bedrock unsigned thinking replay closes #2063

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This commit is contained in:
Mario Zechner
2026-03-14 05:06:14 +01:00
parent a0396e1f9b
commit c961cda2cd
1 changed files with 15 additions and 5 deletions
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12
packages/ai/src/providers/amazon-bedrock.ts
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@@ -537,11 +537,21 @@ function convertMessages(
// For other models, we omit the signature to avoid errors like: // For other models, we omit the signature to avoid errors like:
// "This model doesn't support the reasoningContent.reasoningText.signature field" // "This model doesn't support the reasoningContent.reasoningText.signature field"
if (supportsThinkingSignature(model)) { if (supportsThinkingSignature(model)) {
// Signatures arrive after thinking deltas. If a partial or externally
// persisted message lacks a signature, Bedrock rejects the replayed
// reasoning block. Fall back to plain text, matching Anthropic.
if (!c.thinkingSignature || c.thinkingSignature.trim().length === 0) {
contentBlocks.push({ text: sanitizeSurrogates(c.thinking) });
} else {
contentBlocks.push({ contentBlocks.push({
reasoningContent: { reasoningContent: {
reasoningText: { text: sanitizeSurrogates(c.thinking), signature: c.thinkingSignature }, reasoningText: {
text: sanitizeSurrogates(c.thinking),
signature: c.thinkingSignature,
},
}, },
}); });
}
} else { } else {
contentBlocks.push({ contentBlocks.push({
reasoningContent: { reasoningContent: {