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Ao Chen 6e3bc219e0 fix(anthropic): fix duplicate ToolCallStartEvent in streaming tool calls (#3051 )

When processing `input_json_delta` events, the Anthropic client was
passing the tool name from the previous `tool_use` event. This caused
ag-ui's `_handle_function_call_content` to emit a `ToolCallStartEvent`
for every streaming chunk (since it triggers on `if content.name:`).

This fix changes the behavior to pass an empty string for `name` in
`input_json_delta` events, matching OpenAI's behavior where streaming
argument chunks have `name=""`. The initial `tool_use` event still
provides the tool name, so only one `ToolCallStartEvent` is emitted.

Co-authored-by: Evan Mattson <35585003+moonbox3@users.noreply.github.com>

6e3bc219e0 · 2026-01-12 08:14:49 +00:00

History

agent_framework_anthropic

fix(anthropic): fix duplicate ToolCallStartEvent in streaming tool calls (#3051 )

2026-01-12 08:14:49 +00:00

tests

fix(anthropic): fix duplicate ToolCallStartEvent in streaming tool calls (#3051 )

2026-01-12 08:14:49 +00:00

LICENSE

Python: Introducing the Anthropic Client (#1819 )

2025-11-03 19:32:28 +00:00

pyproject.toml

Python: Bump python version to 1.0.0b260107 for a release (#3128 )

2026-01-08 08:49:28 +09:00

README.md

Python: Introducing the Anthropic Client (#1819 )

2025-11-03 19:32:28 +00:00

README.md

Get Started with Microsoft Agent Framework Anthropic

Please install this package via pip:

pip install agent-framework-anthropic --pre

Anthropic Integration

The Anthropic integration enables communication with the Anthropic API, allowing your Agent Framework applications to leverage Anthropic's capabilities.

Basic Usage Example

See the Anthropic agent examples which demonstrate:

Connecting to a Anthropic endpoint with an agent
Streaming and non-streaming responses