112 Battle-Tested Claude Code Skills — Every Bug Fix That Cost Me Hours So It Won't Cost You

AI coding assistants are powerful. They're also amnesiac. Claude Code will help you fix a Docker SQLite WAL corruption bug at 2am. You'll figure out the root cause (you can't docker cp a SQLite DB from a running container — you need to stop writes first or copy the WAL file too). You'll fix it. Ship it. Move on. Three days later, same project, new session. Claude Code has no memory of that fix. The same bug pattern appears. You debug it again. After the third time this happened to me, I stopped fixing bugs and started building a system to make them unfixable. The Solution: Skills as Muscle Memory Claude Code supports "skills" — markdown files that load into context when relevant patterns are detected. Think of them as institutional memory for your AI assistant. Each skill captures: The problem : What goes wrong, and how it looks when it happens The root cause : Why it happens (not just what to do) The fix : Exact steps, code patches, configuration changes The trigger : When Claude Code