What problem does it solve? Turning a ready feature specification into a safe, parallelizable implementation plan is error-prone: tasks conflict over shared files, plans get edited after locking, and post-evaluation fixes risk rewriting completed work. This Skill produces a local, locked execution plan for exactly one feature and enforces append-only corrective plan versions after a classified evaluation failure. ## Core Features & Use Cases - Dependency-Safe Task Graphs: Expresses implementation as stable TASK-* records with dependencies, exact/prefix write claims, conflict domains, focused validation, done criteria, and stop conditions. - Vertical Slice Planning: Preserves one end-to-end slice across application layers instead of splitting work into broad layer-only steps. - Immutable Corrective Plans: After a proven post-evaluation defect, creates plan vN+1 that preserves every existing task definition byte-for-byte and appends diagnosis-bound corrective tasks, validated by scripts/corrective_plan.py. - Use Case: A coordinator reaches the planning phase for FEAT-001 with requirements and design docs ready; the Skill writes plans/FEAT-001.plan.v1.md plus a lock file, and later, after a failed evaluation, appends a validated corrective v2 plan bound to the original regression oracle. ## Quick Start Ask the Agentic SDLC coordinator to run the create-plan phase for the current ready feature so it writes and locks the local execution plan.
