5 Claude Code Skills That Saved Me Hours This Week (With Install Commands)

Last week I spent 14 hours on repetitive dev tasks — writing boilerplate tests, reviewing PRs, generating docs, debugging deploys. This week I spent 3. The difference? Five Claude Code skills I found (and one I built myself) that automate the painful parts. Here are the exact skills, what they do, and how to install them in under 30 seconds. 1. Code Review — The Adversarial Reviewer The problem: Self-reviewing your own PRs is like proofreading your own essay. You see what you meant to write, not what you actually wrote. What this skill does: Runs a senior-engineer-level adversarial review on your changed files. It checks for logic bugs, security issues, performance problems, missing edge cases, and naming inconsistencies. Not a linter — it thinks about your code the way a skeptical colleague would. Real example: I had a Go handler that returned 200 OK on a database write failure because the error check was on the wrong variable. The skill caught it in 4 seconds. A human reviewer might