[BUG] AiPromptPlugin decorateBody drops all messages except the first one

[eye-gu]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

shenyu/shenyu-plugin/shenyu-plugin-ai/shenyu-plugin-ai-prompt/src/main/java/org/apache/shenyu/plugin/ai/prompt/AiPromptPlugin.java

Line 114 in 338ea9a

decoratedMessages.add(messages.get(0));

In AiPromptPlugin#decorateBody, when decorating the request body, only messages.get(0) is added to decoratedMessages, causing all remaining messages (multi-turn conversation history) to be silently dropped.

Expected Behavior

No response

Steps To Reproduce

No response

Environment

ShenYu version(s):

Debug logs

No response

Anything else?

No response

[github-actions]

👋 Hello @yuluo-yx

A new issue has been opened by @eye-gu:

• Title: [BUG] AiPromptPlugin decorateBody drops all messages except the first one
• Link: [BUG] AiPromptPlugin decorateBody drops all messages except the first one #6342

Please review when you have time. Thank you! 🙏