Is the Riff skill free?

Yes. The skill itself is free from popmechanic/VibesOS. SkillProof publishes the install command and an independent test verdict at no cost.

Does Riff work with Claude Code?

It is in our test queue — we run every skill on real work before issuing a verdict, and this one is scheduled.

How do I install Riff?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Riff with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Riff

Generates multiple parallel app variations so you can compare design directions.

by popmechanic · popmechanic/VibesOS

In test queue

Install — copy the command Download source ↗

Test report

Verdict: In test queue
Tested: —
Environment: Pending

In the test queue — machine-screened (validator 85/100, 133★ repo), full install/trigger/output test scheduled.

What Riff does

Self-contained parallel generator — invoke directly, do not decompose. Generates 3-10 app variations in parallel for comparing ideas. Use when user says "explore options", "give me variations", "riff on this", "brainstorm approaches", or wants to see multiple interpretations of a concept.

How to install Riff

git clone https://github.com/popmechanic/VibesOS
cp -r VibesOS/skills/riff ~/.claude/skills/riff

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger Riff

/riff Generates multiple parallel app variations so you can compare design directions.

It also activates on plain-language prompts like these:

Give me 5 variations of this landing page
Riff on this app concept with different layouts
Brainstorm three approaches to this onboarding flow

Frequently asked questions

Is the Riff skill free?: Yes. The skill itself is free from popmechanic/VibesOS. SkillProof publishes the install command and an independent test verdict at no cost.
Does Riff work with Claude Code?: It is in our test queue — we run every skill on real work before issuing a verdict, and this one is scheduled.
How do I install Riff?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Riff with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.