object April Todd Monad
note left of April: Lunch is ready
April->Todd: Todd, what are you doing?
note right of Todd: Programming _
Todd-->April: Well, I'm programming.
April->Monad: How about you?
Monad-->April: I'm reading book.
April->Monad: Good boy!
note right of Monad: ^_^

程序自动把第一行 object A B C 转换成标准 mermaid participant 语法。

• A->B 实线箭头
• A-->B 虚线箭头
• A->>B 实心箭头
• note left of A 对象左侧注释
• note right of A 对象右侧注释