@google/generative-ai を読む

https://www.npmjs.com/package/@google/generative-ai
https://github.com/google/generative-ai-js

chat = model.startChat
https://github.com/google/generative-ai-js/blob/main/packages/main/src/models/generative-model.ts
ChatSession class that enables sending chat messages and stores history of sent and received messages so far.

chat.sendMessageStream
return streamPromise


model.generateContentStream
https://github.com/google/generative-ai-js/blob/main/packages/main/src/models/generative-model.ts
https://github.com/google/generative-ai-js/blob/main/packages/main/src/methods/generate-content.ts
これがベース関数だ
Model metadataのSupported generation methodsに対応していると思われる

読んだ daiiz