Diego Rodrigues de Sa e Souza f4cd3e8c80 fix(api): serialize tool-call args correctly through /anthropic translation (#6459) (#6609) ...

appendToolCallArgumentDelta() treated any non-string incoming fragment as
empty, silently dropping tool-call arguments delivered as an already-parsed
JSON object/array (a non-conformant shape some upstreams emit for
tool_calls[].function.arguments) instead of JSON-encoding them. This left
tool_use.input empty on the /anthropic streaming path and opened the door to
downstream [object Object] string coercion once buffers were concatenated.
Now JSON.stringify()s the non-string fragment instead of discarding it.

2026-07-07 21:48:27 -03:00

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