This is a plugin that can easily use mermaid with reveal-ck.
% gem install reveal-ck-mermaid-plugin
% mkdir foo
% cd foo
% touch slides.md
% reveal-ck-mermaid-plugin
% reveal-ck generate
in slides.md:
```mermaid
sequenceDiagram
Client -->> Server: Connection
Server ->> Client: Initial
Client ->> Server: Authentication
Server ->> Client: OK
```
Bug reports and pull requests are welcome on GitHub at https://github.com/tmtm/reveal-ck-mermaid-plugin.