This is essentially a passthrough that redirects to the /task command. The description and docs are minimal, so it's hard to say what problem this solves that /task doesn't already handle. It's got 350 installs, which suggests some people find value in having a /workflow alias, maybe for semantic clarity in their prompts or existing habits. If you're already using /task and it works for you, this probably won't change your life. If you like the idea of typing /workflow instead because it reads better in your context, it's a one-line install. Just know you're getting an alias, not additional functionality.
npx skills add https://github.com/camacho/ai-skills --skill workflow