vim-todoedit makes of you to edit todo.txt files by sorting and folding +fold tag etc. on another buffer.

1. create todo.txt file

2. write some tasks

3. sort and fold by due date

<Space> s d

4. open another buffer

press <Space> <Space> on +- 006 due:2018-09-01 ············ line.

<Space> <Space>

5. sort and fold by @Contexts

You can get just tasks what you want.

<Space> s c

6. done a task

<Space> x

needs :
deoplete.nvim
deoplete-todoedit

Before done

After done

@thinca       vim-partedit
@freitass     todo.txt-vim
@dbeniamine   todo.txt-vim

vim-partedit

sort and fold

done and swipe

see: doc/todoedit.txt