zopu-code/repos/effect/.changeset/openai-compat-nullable-tool-name.md

@effect/ai-openai-compat

@effect/ai-openai-compat
patch

Fix dropped streamed tool-call arguments when a provider sends function.name: null on continuation fragments.

OpenAI-compatible providers such as Fireworks send the tool name only on the first streamed tool_calls fragment and function.name: null on the continuation fragments that carry the argument deltas. ChatCompletionToolFunctionDelta.name was Schema.optionalKey(Schema.String) (non-nullable), so chunk validation rejected every continuation and silently discarded its argument delta, leaving the assembled tool call with empty or partial params. name is now nullable (Schema.NullOr(Schema.String)).