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fix: OpenRouter tool_calls validation error with kimi-k2 model - #932
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Fixes AI_TypeValidationError when using OpenRouter's moonshotai/kimi-k2 model. The model returns tool_calls with type="" instead of type="function", causing validation failures in the AI SDK. Added response transformation to fix empty tool_call types in streaming responses. Fixes anomalyco#914 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <[email protected]>
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appreciate digging into this but i don't currently want to merge such a large specific fix for a single provider (novita) - the other providers work |
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Apr 7, 2026
docs: fix rule installation examples
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Summary
Fixes AI_TypeValidationError when using OpenRouter's moonshotai/kimi-k2 model by transforming invalid tool_call responses.
Problem
The moonshotai/kimi-k2 model through OpenRouter returns tool calls with
type: ""(empty string) instead oftype: "function", causing the AI SDK to throw a validation error:Solution
Added a custom fetch override in the OpenRouter provider configuration that:
typetotype: "function"Test plan
opencode run -m openrouter/moonshotai/kimi-k2 "explore this project"Fixes #914
🤖 Generated with Claude Code