Nikunj Kothari's two favorite default Claude Code skills
Nikunj Kothari said that two relatively underused default skills in Claude Code, /insights and /playground, are his favorites. He uses a cron job to run /insights once every two weeks to get suggestions for upgrading his configuration, forming a self-improvement loop with his X bookmarks; /playground is used to visualize workflows, and he also pairs Codex with Claude Code to use it to find dead code, hot paths, and latency optimization points.
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My two favorite default skills on Claude Code, still, that seem relatively less used are a) /insights and b) /playground..
For insights, I have a regular cron job that runs this now every two weeks. It tells me all the best ways to upgrade my setup. I pair it with X bookmarks that show all the new ways to build a software factory. It's a self improving loop on how I use Claude Code + what the industry thinks I should move to.
For playground, it's the best way to visualize what's happening in the workflow. I ask it to show me architecture of esoteric Github's to simulating a full learning loop on my side project. My new favorite thing is to pair Codex + Claude Code on this skill and ask it to find dead code, hot pathways, latency improvements.
Give it a shot and tell me what you think!