What problem does it solve? Implementation plans become outdated as requirements change, and manually revising them risks inconsistencies, stale file references, and unverified assumptions. This Skill guides an AI agent through a structured process to update existing plan documents accurately. ## Core Features & Use Cases - Guided Plan Iteration: Parses a plan file path and user feedback, then applies surgical edits while preserving the plan's existing structure and quality standards. - Research-Backed Updates: Spawns parallel research sub-tasks (codebase locators, analyzers, pattern finders) when changes require new technical understanding, ensuring edits are grounded in actual code. - Consistent Success Criteria: Maintains the two-category structure of automated verification (make commands, compilation checks) and manual verification (UI/UX, performance) when updating criteria. - Use Case: A developer has a plan at thoughts/shared/plans/2025-10-16-feature.md and needs to split Phase 2 into backend and frontend phases. The Skill reads the full plan, confirms the intended changes, makes precise edits, and syncs the updated plan. ## Quick Start Ask the agent to iterate on the plan at thoughts/shared/plans/2025-10-16-feature.md by adding a phase for error handling.
