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Get Started Free →Make compound growth actually click — see how small, consistent amounts become large over time, and why starting now beats starting bigger later. Use when asked explain compound interest, how does compounding work, is it worth investing small amounts, or why should I start now. Produces an intuitive explanation of compounding with concrete illustrative examples for your situation, the outsized effect of time (why an early start beats a later larger one), how fees and inflation eat into it, and t
.claude/skills/mohitagw15856-compound-growth-explainer/SKILL.md| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-07 | ✗→✓ | ▲ Improved | 51% | 0% |
| case-08 | ✗→✓ | ▲ Improved | 82% | 0% |
| case-12 | ✗→✓ | ▲ Improved | 45% | 0% |
| case-01 | ✓→✓ | = Same ✓ | 25% | 0% |
| case-02 | ✓→✓ | = Same ✓ | 10% | 0% |
Compounding is the most important financial concept and the least intuitive — humans think linearly, but compounding curves upward, so the results feel impossible until you see them. This makes it click with concrete examples: how small consistent amounts snowball, why time matters more than amount (an early start usually beats a later bigger one), and how fees and inflation quietly work against it. The point is motivation: start now.
Ask for these if not provided:
The idea: returns earn returns → growth curves upward (flat early, steep later). Your example: worked illustration with your amount/contribution/timeframe]. Why time beats amount: early-smaller vs later-larger illustration] — start now. What eats it: fees and inflation compound against you — why small %s matter hugely]. Honest caveat: illustrative only — real returns vary and aren't guaranteed.
> Educational, not financial advice. Figures illustrate the concept, not a prediction.
| Case | Status | Duration (ms) | Turns | Tokens | Tool calls | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Without | With | Δ | Without | With | Δ | Without | With | Δ | Without | With | Δ | ||
case-07 | fail→pass | 18,177 | 19,454 | +7% | 1 | 1 | 0% | 2,222 | 3,349 | +51% | 0 | 0 | — |
case-08 | fail→pass | 16,615 | 21,252 | +28% | 1 | 1 | 0% | 2,104 | 3,828 | +82% | 0 | 0 | — |
case-01 | pass→pass | 25,156 | 25,502 | +1% | 1 | 1 | 0% | 3,868 | 4,825 | +25% | 0 | 0 | — |
case-02 | pass→pass | 22,792 | 19,860 | -13% | 1 | 1 | 0% | 3,430 | 3,772 | +10% | 0 | 0 | — |
case-03 | pass→pass | 30,974 | 20,234 | -35% | 1 | 1 | 0% | 4,803 | 3,905 | -19% | 0 | 0 | — |
case-04 | fail→fail | 18,978 | 22,516 | +19% | 1 | 1 | 0% | 2,542 | 3,142 | +24% | 0 | 0 | — |
case-05 | fail→fail | 20,791 | 23,342 | +12% | 1 | 1 | 0% | 3,422 | 5,443 | +59% | 0 | 0 | — |
case-06 | pass→pass | 22,193 | 24,722 | +11% | 1 | 1 | 0% | 3,944 | 4,696 | +19% | 0 | 0 | — |
case-09 | pass→pass | 17,649 | 14,814 | -16% | 1 | 1 | 0% | 2,690 | 3,736 | +39% | 0 | 0 | — |
case-10 | pass→pass | 8,946 | 12,491 | +40% | 1 | 1 | 0% | 1,912 | 2,817 | +47% | 0 | 0 | — |
case-11 | pass→pass | 17,595 | 18,982 | +8% | 1 | 1 | 0% | 2,102 | 3,292 | +57% | 0 | 0 | — |
case-12 | fail→pass | 17,592 | 11,245 | -36% | 1 | 1 | 0% | 1,897 | 2,759 | +45% | 0 | 0 | — |
case-13 | pass→pass | 17,959 | 14,684 | -18% | 1 | 1 | 0% | 2,273 | 3,493 | +54% | 0 | 0 | — |
case-14 | pass→pass | 20,797 | 24,038 | +16% | 1 | 1 | 0% | 2,725 | 3,575 | +31% | 0 | 0 | — |
case-15 | pass→pass | 14,335 | 20,873 | +46% | 1 | 1 | 0% | 2,912 | 3,961 | +36% | 0 | 0 | — |
case-16 | pass→pass | 19,129 | 28,526 | +49% | 1 | 1 | 0% | 2,481 | 3,343 | +35% | 0 | 0 | — |
case-17 | pass→pass | 10,801 | 22,628 | +109% | 1 | 1 | 0% | 2,225 | 4,009 | +80% | 0 | 0 | — |
case-18 | pass→pass | 21,140 | 26,404 | +25% | 1 | 1 | 0% | 2,649 | 3,694 | +39% | 0 | 0 | — |
case-19 | pass→pass | 21,196 | 17,734 | -16% | 1 | 1 | 0% | 2,334 | 3,515 | +51% | 0 | 0 | — |
case-20 | pass→pass | 17,790 | 24,298 | +37% | 1 | 1 | 0% | 2,413 | 3,590 | +49% | 0 | 0 | — |
case-21 | pass→pass | 13,030 | 15,006 | +15% | 1 | 1 | 0% | 2,279 | 3,559 | +56% | 0 | 0 | — |
case-22 | pass→pass | 11,605 | 13,025 | +12% | 1 | 1 | 0% | 2,238 | 3,167 | +42% | 0 | 0 | — |
case-23 | pass→pass | 15,882 | 15,936 | +0% | 1 | 1 | 0% | 2,838 | 3,557 | +25% | 0 | 0 | — |
case-24 | pass→pass | 19,981 | 15,230 | -24% | 1 | 1 | 0% | 3,018 | 3,716 | +23% | 0 | 0 | — |
case-25 | pass→pass | 11,203 | 13,860 | +24% | 1 | 1 | 0% | 2,192 | 3,540 | +61% | 0 | 0 | — |
DecimalAI ran this skill against gemini-3.6-flash twice over the same eval suite — once with the skill loaded and once without — and compared the two runs case by case. 25 cases were attempted. The headline lift of +12 percentage points is the difference between those two pass rates over the 25 comparable cases.
Without the skill loaded, the model failed this case. With it loaded, the same prompt on the same model passed. This is one improved case from the latest verified run; every case, including any that regressed, is in the table above.
Other measured skills in the registry, with their headline benchmark lift.