Add agent plugins support to AISDKAgent.#8
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mm-zacharydavison wants to merge 1 commit intomainfrom
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masudahiroto
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Jan 20, 2026
| // Sanitize messages before sending to ensure no provider-specific fields leak through (e.g. for Anthropic: 'tool_use_id') | ||
| const sanitizedInputMessages = this.sanitizeMessages(messages); | ||
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| // Run onUserMessage plugin hook |
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This feature itself works fine, but please note that if you modify any of the previous messages in the conversation, prompt caching will no longer work.
https://platform.claude.com/docs/ja/build-with-claude/prompt-caching
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This is a good point. I need to think about it.
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[FYI] manus famous document about context engineering says KV cache (= prompt caching in anthropic) is very important.
https://manus.im/en/blog/Context-Engineering-for-AI-Agents-Lessons-from-Building-Manus
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I was implementing citations feature, and it requires different implementation depending on source of citations (e.g. Anthropic Web Search, OpenAI Web Search, RAG, all operate differently).
It was making the code messy, so I created agent plugin system to use.
I will use it for citations feature.