5 Claude Skills That Should Be Illegal

How to do it

1. 1Contract auditor: paste any contract and ask Claude to flag every clause that favours the other party, rate each risk from 1 to 10, and explain each in plain English
2. 2Voice cloner: feed Claude 5 to 10 examples of your writing and ask it to extract your stylistic patterns, including sentence length, vocabulary level, tone markers, and structural habits, then apply them to new content
3. 3App builder: describe a tool you need, the data it handles, and who uses it. Ask Claude to build a working Streamlit or Next.js app with all required logic and deploy instructions
4. 4Money-leak detector: paste your last 3 months of bank and card transactions. Ask for a categorised analysis of recurring charges you may have forgotten, and a ranked list of cuts by impact
5. 5Negotiation coach: describe an upcoming negotiation, your goal, the other party's likely position, and any constraints. Claude generates a step-by-step script with counter-offer strategy and fallback positions
6. 6For all five: lead with a context block about who you are and what the document or situation involves before the task instruction. This is what separates a prompt that produces professional-grade output from one that gives a generic answer

Why it works

These are not tricks, they are well-structured prompts that match Claude's actual capabilities. The difference between a prompt that works and one that does not is almost always the specificity and completeness of the input context.