A Skill is a prompt template you invoke manually. A Subagent is an independent agent that Claude routes to automatically. They look similar, but differ completely in trigger mechanism, tool isolation, and context management.
A Skill is an SOP written for AI. Define the steps in a Markdown file and Claude follows them. No coding required, no frameworks to learn — just write down what an experienced person would do.
Stuck mid-debug and can't fix it right now? Use /file-bug-issue to package the error analysis, reproduction steps, and attempted fixes from your conversation into a well-structured GitHub issue. Pair it with a Remote Agent to let AI automatically take over the fix.