Implementation Planner is a specialized Claude Code skill that transforms abstract requirements into concrete, step-by-step build plans. It streamlines the development workflow by researching existing codebase patterns, identifying technical gaps, and mapping requirements to specific implementation tasks. By saving these plans as persistent Markdown artifacts in the .lore/plans/ directory, it ensures project context remains clear across sessions and enables automated reviews to catch assumptions before coding begins. This skill is essential for developers looking to move from high-level design to disciplined, traceable execution.