# Task ID: 3
# Title: Implement Basic Task Operations
# Status: done
# Dependencies: 1
# Priority: high
# Description: Create core functionality for managing tasks including listing, creating, updating, and deleting tasks.
# Details:
Implement the following task operations:
- List tasks with filtering options
- Create new tasks with required fields
- Update existing task properties
- Delete tasks
- Change task status (pending/done/deferred)
- Handle dependencies between tasks
- Manage task priorities

# Test Strategy:
Test each operation with valid and invalid inputs. Verify that dependencies are properly tracked and that status changes are reflected correctly in the tasks.json file.