Use when building anything USER-FACING (or with persuasion/retention/cancellation/consent/pricing flows, or that touches vulnerable people) to surface design-level harm the security/privacy/compliance gates miss: dark/deceptive patterns and foreseeable misuse. Assumes the product works as designed and asks who it could harm and whether it is Happier-negative. NUDGE, not a block.
How to install harms-check?
haabe/mycelium/harms-check
$npx -y skills add haabe/mycelium --skill harms-checkInstalls into the current project.
›Prefer a prompt? Paste this to your agent
Run `npx skills use "https://github.com/haabe/mycelium" --skill "haabe/mycelium/harms-check"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/haabe/mycelium" that are relevant to the current task. Run `npx skills add "https://github.com/haabe/mycelium"` and select the relevant skills, then follow their instructions.
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