feat(anthropic): support extended thinking round trips

[dailingtao]

AgentScope-Java Version

2.0.3-SNAPSHOT

Description

Fixes #2219.

This PR adds Anthropic extended-thinking round-trip support while preserving Anthropic-native signed content across streaming, multi-turn, and tool-use flows.

• map GenerateOptions.thinkingBudget to Anthropic manual thinking (type: enabled with budget_tokens)
• allow explicit adaptive thinking through additionalBodyParams; per-call configuration overrides defaults, while conflicting manual/adaptive configurations fail locally
• preserve signed and redacted thinking blocks in ThinkingBlock metadata and restore them in their original order when conversation history is sent back to Anthropic
• preserve the complete assistant message when signed thinking accompanies parallel tool calls, and group their matching tool results into one user message
• preserve thinking metadata while streaming chunks are accumulated by ReasoningContext
• reject malformed Anthropic-owned thinking metadata instead of silently converting it to ordinary text; unsigned/non-Anthropic thinking keeps the existing text fallback
• keep the latest main prompt-caching token accounting when merging streaming parser state
• document adaptive and manual thinking configuration in English and Chinese
• add an Anthropic SDK + MockWebServer HTTP round-trip regression test, which verifies the serialized follow-up request locally without a Cloud API key

Validation

• mvn -pl agentscope-extensions/agentscope-extensions-model/agentscope-extensions-model-anthropic -am -Dtest=AnthropicResponseParserTest,AnthropicMessageConverterTest,AnthropicToolsHelperTest,AnthropicChatModelThinkingRoundTripTest -Dsurefire.failIfNoSpecifiedTests=false test
  • 83 tests, 0 failures, 0 errors, 1 skipped
• mvn -pl agentscope-extensions/agentscope-extensions-model/agentscope-extensions-model-anthropic -am clean verify
  • AgentScope Core: 2,296 tests, 0 failures, 0 errors, 9 skipped
  • Anthropic model extension: 186 tests, 0 failures, 0 errors, 1 skipped
  • Anthropic JAR, sources JAR, and Javadoc JAR built successfully
• git diff --check

Checklist

• Code formatting verified by Spotless during clean verify
• All relevant tests are passing
• Javadoc comments follow project conventions
• Related English and Chinese documentation has been updated
• Code is ready for review

[codecov]

Codecov Report

❌ Patch coverage is 87.30159% with 24 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...anthropic/formatter/AnthropicThinkingMetadata.java	82.45%	4 Missing and 6 partials ⚠️
...pe/core/agent/accumulator/ThinkingAccumulator.java	58.33%	2 Missing and 3 partials ⚠️
...odel/anthropic/formatter/AnthropicToolsHelper.java	80.76%	1 Missing and 4 partials ⚠️
...l/anthropic/formatter/AnthropicResponseParser.java	94.91%	1 Missing and 2 partials ⚠️
...anthropic/formatter/AnthropicMessageConverter.java	97.14%	0 Missing and 1 partial ⚠️

📢 Thoughts on this report? Let us know!

[AgentScopeJavaBot]

🤖 AI Review

Aspect	Count
🟢 Nitpick (信息性建议，不阻塞合并)	3
🟡 Recommended (建议修复，但不阻塞合并)	2

Overall Assessment: COMMENT — Well-designed extended thinking round-trip support; two defensive-programming improvements recommended before merge.

[AgentScopeJavaBot]

🤖 AI Review

Aspect	Count
🟢 Nitpick (信息性建议，不阻塞合并)	3
🟡 Recommended (建议修复，但不阻塞合并)	2

Overall Assessment: COMMENT — Well-designed extended thinking round-trip support; two defensive-programming improvements recommended before merge.

[dailingtao]

Hi @jujn, it looks like AgentScopeJavaBot may be stuck on this PR.

The bot submitted the same review summary twice for commit d7f6dea4,
reporting 3 nitpicks and 2 recommendations, but no inline comments or
review threads were created, so I couldn't see the specific findings.

The latest head is now 1bcd3d7c, and the new review request is still
pending. I also don't have permission to re-request reviewers.

Could you please help re-trigger the AI review or check whether the bot
service is working correctly?

All current CI checks are passing. Thanks!

[jujn]

Thanks for your contribution. I'll review it later when I have time.

[jujn]

为什么关闭了？因为PR比较大，之前一直抽不出完整的时间去审。预计 2.0.4 会合入

[dailingtao]

为什么关闭了？因为PR比较大，之前一直抽不出完整的时间去审。预计 2.0.4 会合入

好的 thanks ，以为不合入了 看到dingding群里的一个哥们说 可以抽空把自己没合入的PR 清一下 减小review的压力