[Remind-Fans] CLI todo list management

[David J Patrick]

remind is the undisputed king of CLI scheduling apps.
What is the analogous unixy way to handle todos ?
or can remind be made to handle dateless (or date reduced) tasks ?
I just saw a fine method of planting a text code to indicate todo status
(at 43folders) ;

[ ] a task to perform
[x] completed task
( ) client task
(x) client task completed

etc

what todo ?
djp