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fix(model): anthorpic stream thinking event #1943

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fix(model): anthorpic stream thinking event #1943

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10 changes: 10 additions & 0 deletions ...main/java/io/agentscope/extensions/model/anthropic/formatter/AnthropicResponseParser.java
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Original file line number Diff line number Diff line change
Expand Up @@ -140,6 +140,16 @@ private static ChatResponse parseStreamEvent(RawMessageStreamEvent event, Instan
contentBlocks.add(
TextBlock.builder().text(textDelta.text()).build()));

deltaEvent
.delta()
.thinking()
.ifPresent(
thinkingDelta ->
contentBlocks.add(
ThinkingBlock.builder()
.thinking(thinkingDelta.thinking())
.build()));

// Input JSON delta (tool calling)
deltaEvent
.delta()
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21 changes: 21 additions & 0 deletions .../java/io/agentscope/extensions/model/anthropic/formatter/AnthropicResponseParserTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@

import com.anthropic.models.messages.ContentBlock;
import com.anthropic.models.messages.Message;
import com.anthropic.models.messages.RawContentBlockDeltaEvent;
import com.anthropic.models.messages.RawMessageStartEvent;
import com.anthropic.models.messages.RawMessageStreamEvent;
import com.anthropic.models.messages.Usage;
Expand Down Expand Up @@ -316,6 +317,26 @@ void testParseStreamEventMessageStart() throws Exception {
assertTrue(response.getContent().isEmpty()); // MessageStart has no content
}

@Test
void testParseStreamEventThinkingDelta() throws Exception {
RawContentBlockDeltaEvent deltaEvent =
RawContentBlockDeltaEvent.builder()
.index(0)
.thinkingDelta("Let me reason through this.")
.build();
RawMessageStreamEvent event = RawMessageStreamEvent.ofContentBlockDelta(deltaEvent);

Instant startTime = Instant.now();
ChatResponse response = invokeParseStreamEvent(event, startTime);

assertNotNull(response);
assertEquals(1, response.getContent().size());
ThinkingBlock parsedThinking =
assertInstanceOf(ThinkingBlock.class, response.getContent().get(0));
assertEquals("Let me reason through this.", parsedThinking.getThinking());
assertNull(response.getUsage());
}

@Test
void testParseStreamEventUnknownType() throws Exception {
// Test unknown event type - should return empty response
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