Task dependencies

[boolean-maybe]

Summary

A proper task-inter-dependency system

Background

Tasks can be related to each other in multiple ways - depends on, includes, blocked by, duplicate of. There
needs to be a way to create, maintain and track task dependencies

Details

This requires:

• define where and how task dependency is defined (frontmatter?)
• UI for dependency creation and viewing
• Dependency tracking, cycle detection and validation

Outcome

A proper task-dependency system would open way for much broader functionality