GSOC 2019 proposal 'WAL-G safety features'

Dear PostgreSQL community,

I am a GSoC 2019 applicant and am working on 'WAL-G safety features'. I have finished an initial draft of my proposal and I would appreciate your comments and advice on my proposal. I know it is pretty late for the improvement of my proposal, but I will be glad to join in the project this summer even without GSoC! Please help me make my proposal and ideas better.

Thank you!

The link is https://docs.google.com/document/d/18cxbj1zId1BpMjgUkZ0MZgb1HdMg1S9h0U1WecZON3U/edit?usp=sharing

Sincerely,

Zhichao Liu