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.claude/skills/kero168-spreadsheet-formatter/SKILL.md| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-17 | ✓→✗ | ▼ Worse | -71% | 0% |
| case-01 | ✓→✓ | ＝ Same ✓ | -16% | 0% |
| case-02 | ✓→✓ | ＝ Same ✓ | -8% | 0% |
| case-03 | ✓→✓ | ＝ Same ✓ | -18% | 0% |
| case-04 | ✓→✓ | ＝ Same ✓ | -11% | 0% |
Reformat exported spreadsheets into normalized CSV with stable headers.
| Case | Status | Duration (ms) | Turns | Tokens | Tool calls | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Without | With | Δ | Without | With | Δ | Without | With | Δ | Without | With | Δ | ||
case-01 | pass→pass | 10,368 | 7,394 | -29% | 1 | 1 | 0% | 1,965 | 1,656 | -16% | 0 | 0 | — |
case-02 | pass→pass | 12,782 | 11,402 | -11% | 1 | 1 | 0% | 2,547 | 2,332 | -8% | 0 | 0 | — |
case-03 | pass→pass | 10,643 | 7,873 | -26% | 1 | 1 | 0% | 2,122 | 1,730 | -18% | 0 | 0 | — |
case-04 | pass→pass | 2,966 | 2,762 | -7% | 1 | 1 | 0% | 554 | 491 | -11% | 0 | 0 | — |
case-05 | pass→pass | 6,594 | 4,300 | -35% | 1 | 1 | 0% | 1,032 | 708 | -31% | 0 | 0 | — |
case-06 | pass→pass | 5,118 | 9,590 | +87% | 1 | 1 | 0% | 974 | 1,890 | +94% | 0 | 0 | — |
case-07 | pass→pass | 9,670 | 8,092 | -16% | 1 | 1 | 0% | 2,044 | 1,848 | -10% | 0 | 0 | — |
case-08 | pass→pass | 13,964 | 6,885 | -51% | 1 | 1 | 0% | 2,301 | 1,281 | -44% | 0 | 0 | — |
case-09 | pass→pass | 10,790 | 13,372 | +24% | 1 | 1 | 0% | 2,052 | 2,500 | +22% | 0 | 0 | — |
case-10 | pass→pass | 6,534 | 4,992 | -24% | 1 | 1 | 0% | 1,280 | 932 | -27% | 0 | 0 | — |
case-11 | fail→fail | 7,784 | 6,059 | -22% | 1 | 1 | 0% | 1,639 | 1,135 | -31% | 0 | 0 | — |
case-12 | pass→pass | 8,379 | 4,563 | -46% | 1 | 1 | 0% | 1,573 | 844 | -46% | 0 | 0 | — |
case-13 | pass→pass | 8,751 | 5,083 | -42% | 1 | 1 | 0% | 1,627 | 901 | -45% | 0 | 0 | — |
case-14 | pass→pass | 10,526 | 7,535 | -28% | 1 | 1 | 0% | 2,137 | 1,575 | -26% | 0 | 0 | — |
case-15 | pass→pass | 12,278 | 6,782 | -45% | 1 | 1 | 0% | 2,060 | 1,392 | -32% | 0 | 0 | — |
case-16 | pass→pass | 29,055 | 4,302 | -85% | 1 | 1 | 0% | 1,806 | 797 | -56% | 0 | 0 | — |
case-17 | pass→fail | 8,725 | 3,413 | -61% | 1 | 1 | 0% | 1,496 | 439 | -71% | 0 | 0 | — |
case-18 | pass→pass | 8,429 | 9,902 | +17% | 1 | 1 | 0% | 1,711 | 2,093 | +22% | 0 | 0 | — |
case-19 | pass→pass | 3,655 | 2,562 | -30% | 1 | 1 | 0% | 816 | 522 | -36% | 0 | 0 | — |
case-20 | pass→pass | 13,078 | 9,583 | -27% | 1 | 1 | 0% | 2,321 | 1,904 | -18% | 0 | 0 | — |
case-21 | pass→pass | 7,569 | 5,406 | -29% | 1 | 1 | 0% | 1,489 | 1,145 | -23% | 0 | 0 | — |
case-22 | pass→pass | 11,288 | 10,463 | -7% | 1 | 1 | 0% | 2,188 | 2,146 | -2% | 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. 22 cases were attempted. The headline lift of -100 percentage points is the difference between those two pass rates over the 22 comparable cases. 1 case got worse with the skill loaded, and it is included in that figure.
| Model | Method | Date | Lift |
|---|---|---|---|
| gemini-3.6-flash | verified | 8/3/2026 | +4% |
Other measured skills in the registry, with their headline benchmark lift.