Knip

Runs knip to find unused files, dependencies, and exports across your codebase. The skill follows a configuration-first workflow, meaning it'll tune knip's settings before recommending deletions, which matters because knip can be noisy without proper setup. It handles the full cycle: checking for framework plugins, addressing configuration hints, then working through unused files and dependencies in priority order. Won't auto-delete anything that looks like a public API without asking first. The approach is methodical, almost cautious, which is exactly right for a tool that could otherwise nuke important code. Useful when you inherit a messy project or just want to clean house periodically.