Agent Skills: understand

[Process] Use when the developer wants something explained — by default the current working tasks + changes in context, or whatever the prompt names (a plan, a subsystem, a decision, a concept, a bug). AI derives WHAT to explain from the prompt and ALWAYS delivers a detailed, one-way explanation of purpose (why it exists), how (the mechanics), and why-this-way (trade-offs/alternatives) — regardless of coding level. Never asks the user questions, never quizzes, never blocks.