/plugin marketplace add RemiPelloux/kill-my-idea
/plugin install kill-my-idea@kill-my-idea
▶ Watch a real run (50 s): 19 searches, 34 sources, the verdict, the report and the dashboard.
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Ask an AI whether your idea is good and it will usually find a way to say yes. kill-my-idea does
the opposite. It looks for a free alternative, competitors, people who already failed, and the
numbers that don't add up. Then it gives you a score out of 100, a GO / PIVOT / NO-GO verdict, the
ways the idea could still be saved, and a report where every number has a source.
Paste a "$10k/month" tweet
The most common use: you see a viral thread promising easy money. Paste it in:
kill my idea: <paste the thread>
It checks every claim, names what the author is selling, redoes the math and gives a verdict.
Real example, a viral thread about AI-written Amazon KDP books:
| The thread said | The check found |
|---|
| "$3,000 a month from 5 sales a day" | About $1,380 in royalties once printing costs are counted (KDP royalty rules) |
| "Anyone can do it" | About 300k new books a month compete for the same shelf (AI Policy Desk) |
| "$3M from books" | No evidence ever shown. The author sells KDP coaching |
| Verdict | PIVOT, 52/100. Run a 1-week niche test before writing a word (full card) |
Same idea, two answers
We asked plain Claude and kill-my-idea about the same idea: an AI app that writes wedding speeches, at $19 each.
| Claude, no plugin | kill-my-idea |
|---|
| Verdict | "It's a decent small business." | NO-GO, 44/100, confidence high |
| Sources | None | 40, linked |
| Competition | "Several AI speech tools exist." | 11 named: AI tools at $0.99–65 a speech, human writers at $100–655, and free ChatGPT does the job. A look-alike app made $9.98 in the last 30 days ($311 all-time, Stripe-verified) |
| Unit economics | "Margins are almost entirely marketing." | LTV $19.7 vs CAC ~$35 on paid search: LTV:CAC 0.56 (estimates, reasoning shown). Every paid sale loses money |
| What to do next | Spend about $200 on ads and see | Archive the $19 app. If you want one test: a 7-day Fiverr gig for a $59 human-edited speech. Fewer than 3 inquiries: stop |
Plain Claude's full answer is here, unedited. The kill-my-idea version is a live report.
Seven ideas it has checked
All seven are real runs, mostly ideas we were about to spend time or money on. The coloring book is
why this exists: we built it first, three versions and a day of work, and a five-minute search then
found the same book for free. The plugin also checked itself: 63, because fifteen open-source idea
validators already exist.
The gallery ranks 14 more real
runs on popular side hustles (dropshipping, Etsy planners, AI headshots, a faceless YouTube channel,
vending machines…), with every report one click away.
The report
Every run writes report.html, a report you open in a browser and can print as an A4 PDF.
It opens with the answer, then shows what would change it:
It goes on to cover:
- the score breakdown: 21 sub-scores you can expand, the raw total, and which fixed rules capped it;
- a confidence level (high, medium or low) and the distance to the next verdict band;
- each kill shot, with its evidence, marked hit, clear or not checked, and the one that weighs most;
- market size;
- a map of competitors by price and traction;
- a country comparison;
- LTV:CAC against healthy thresholds;
- monthly scenarios and a risk matrix;
- a pre-mortem: the three most likely ways it dies, each with an early warning sign;
- Why now? (what changed that makes this the right time, or not) and the ideal first customer;
- a What if? card: move price, CAC, margin and lifetime with sliders and watch LTV, LTV:CAC, payback and the Profit sub-score update;
- a 7-day test with the conditions for stopping it;
- numbered sources, each tagged primary, secondary or tertiary.
Every number shows whether it was sourced, estimated (hover for the formula) or not found.
After a deep dive, the report shows how the score moved since the quick verdict.
One click on Share card downloads a PNG verdict card for social media, and reports follow your language (English or French).
All your ideas in one place
Every run updates ideas/board.html, a dashboard of every idea you've checked, and
ideas/BRAIN.md, one note that remembers you and your ideas.
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