What problem does it solve? Product teams building algorithm-problem-solving platforms (Baekjoon/LeetCode-style judges) struggle to design hints, editorials, and explanations that aid learning without spoiling the discovery process or corrupting learning signals. ## Core Features & Use Cases - Editorial Design Specs: Produces structured requirements covering explanation sections, reveal policies per user state (before attempt, during, after AC), and learning safeguards. - Hint Ladder & Spoiler Control: Defines a 7-level hint ladder (meta nudge to full solution) with fading principles grounded in learning science (worked-example effect, ZPD, scaffolding). - Explanation Quality Review: Audits existing editorials against quality criteria like reasoning paths, correctness arguments, complexity analysis, and common pitfalls. - Use Case: When deciding whether reading an editorial should count as solving, or how to gate AI-generated explanations in assessment mode, this Skill produces the domain distinctions, metrics, and risk analysis. ## Quick Start Ask the Skill to structure a good editorial and define the reveal policy for hints versus full solutions in learning mode.