Orchestrate parallel development tasks with dependency management and test-driven validation.

• Parses markdown plan files to extract task definitions, dependencies, and acceptance criteria, then launches unblocked tasks in parallel waves using Sparky subagents
• Enforces test-driven development (RED phase first) for testable tasks, with fallback to documented non-testable verification (manual, static, or runtime checks)
• Manages task dependencies automatically, blocking tasks until their prerequisites complete, and validates each task before marking it done
• Updates plan documentation with completion status, work logs, modified files, and validation evidence after each task completes