fix: filter empty assistant messages for all providers#1
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spencer-hong merged 1 commit intodevfrom Mar 31, 2026
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Remove the @ai-sdk/anthropic || @ai-sdk/amazon-bedrock guard from the empty message filter in normalizeMessages so it runs unconditionally. Many providers (Moonshot/Kimi, OpenAI-compatible, etc.) reject empty assistant messages with "the message at position X with role 'assistant' must not be empty". This commonly happens when a tool call is cancelled or when the assistant response is tool-only with no text content. Refs: anomalyco#6056 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
@ai-sdk/anthropic || @ai-sdk/amazon-bedrockguard from the empty message filter innormalizeMessagesso it runs unconditionally for all providers"the message at position X with role 'assistant' must not be empty"Context
f9563610-c435-4417-adf3-71a83d9224c3with Kimi/Moonshot providerTest plan
🤖 Generated with Claude Code