Loading skill
Install any skill in seconds. Free to start, no credit card required.
Get Started Free →Picks random winners from lists, spreadsheets, or Google Sheets for giveaways, raffles, and contests. Ensures fair, unbiased selection with transparency.
.claude/skills/bilal140202-raffle-winner-picker/SKILL.md| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-01 | ✗→✓ | ▲ Improved | 15% | 0% |
| case-11 | ✗→✓ | ▲ Improved | 55% | 0% |
| case-14 | ✗→✓ | ▲ Improved | 7% | 0% |
| case-04 | ✓→✗ | ▼ Worse | -34% | 0% |
| case-02 | ✓→✓ | ＝ Same ✓ | 34% | 0% |
This skill randomly selects winners from lists, spreadsheets, or Google Sheets for giveaways and contests.
Pick a random row from this Google Sheet to select a winner
for a giveaway: [Sheet URL]Pick 3 random winners from entries.csvPick a random winner from this list:
- Alice (alice@email.com)
- Bob (bob@email.com)
- Carol (carol@email.com)
...Pick 5 random winners from contest-entries.xlsx,
make sure no duplicatesUser: "Pick a random row from this Google Sheet to select a winner for a giveaway."
Output:
Accessing Google Sheet...
Total entries found: 247
Randomly selecting winner...
🎉 WINNER SELECTED! 🎉
Row #142
Name: Sarah Johnson
Email: sarah.j@email.com
Entry Date: March 10, 2024
Comment: "Love your newsletter!"
Selection method: Cryptographically random
Timestamp: 2024-03-15 14:32:18 UTC
Would you like to:
- Pick another winner (excluding Sarah)?
- Export winner details?
- Pick runner-ups?Inspired by: Lenny's use case - picking a Sora 2 giveaway winner from his subscriber Slack community
Pick a random winner excluding previous winners:
Alice, Bob, CarolPick a winner with weighted probability based on
the "entries" column (1 entry = 1 ticket)Pick 1 winner and 3 runner-ups from the list✓ Uses cryptographically secure randomness ✓ No manipulation possible ✓ Timestamp recorded for verification ✓ Can provide seed for third-party verification ✓ Respects data privacy
| Case | Status | Duration (ms) | Turns | Tokens | Tool calls | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Without | With | Δ | Without | With | Δ | Without | With | Δ | Without | With | Δ | ||
case-01 | fail→pass | 10,319 | 6,309 | -39% | 1 | 1 | 0% | 1,787 | 2,050 | +15% | 0 | 0 | — |
case-02 | pass→pass | 8,245 | 6,668 | -19% | 1 | 1 | 0% | 1,467 | 1,961 | +34% | 0 | 0 | — |
case-03 | fail→fail | 8,047 | 5,028 | -38% | 1 | 1 | 0% | 1,404 | 1,641 | +17% | 0 | 0 | — |
case-04 | pass→fail | 13,199 | 5,618 | -57% | 1 | 1 | 0% | 2,680 | 1,758 | -34% | 0 | 0 | — |
case-05 | fail→fail | 3,013 | 3,039 | +1% | 1 | 1 | 0% | 472 | 1,304 | +176% | 0 | 0 | — |
case-10 | pass→pass | 2,404 | 3,449 | +43% | 1 | 1 | 0% | 520 | 1,602 | +208% | 0 | 0 | — |
case-06 | pass→pass | 5,116 | 5,175 | +1% | 1 | 1 | 0% | 1,083 | 1,890 | +75% | 0 | 0 | — |
case-07 | pass→pass | 11,249 | 7,540 | -33% | 1 | 1 | 0% | 1,939 | 2,180 | +12% | 0 | 0 | — |
case-08 | pass→pass | 14,254 | 9,112 | -36% | 1 | 1 | 0% | 2,398 | 2,384 | -1% | 0 | 0 | — |
case-09 | pass→pass | 10,820 | 6,287 | -42% | 1 | 1 | 0% | 1,820 | 2,006 | +10% | 0 | 0 | — |
case-11 | fail→pass | 6,020 | 4,673 | -22% | 1 | 1 | 0% | 1,082 | 1,678 | +55% | 0 | 0 | — |
case-12 | pass→pass | 14,982 | 11,691 | -22% | 1 | 1 | 0% | 2,628 | 3,030 | +15% | 0 | 0 | — |
case-13 | pass→pass | 11,151 | 9,309 | -17% | 1 | 1 | 0% | 1,809 | 2,458 | +36% | 0 | 0 | — |
case-14 | fail→pass | 8,436 | 4,625 | -45% | 1 | 1 | 0% | 1,578 | 1,692 | +7% | 0 | 0 | — |
case-15 | pass→pass | 3,329 | 3,367 | +1% | 1 | 1 | 0% | 608 | 1,428 | +135% | 0 | 0 | — |
case-16 | fail→fail | 10,517 | 7,828 | -26% | 1 | 1 | 0% | 1,945 | 2,084 | +7% | 0 | 0 | — |
case-17 | fail→fail | 6,857 | 3,923 | -43% | 1 | 1 | 0% | 1,001 | 1,538 | +54% | 0 | 0 | — |
case-18 | pass→pass | 3,055 | 3,558 | +16% | 1 | 1 | 0% | 510 | 1,454 | +185% | 0 | 0 | — |
case-19 | fail→fail | 7,667 | 2,624 | -66% | 1 | 1 | 0% | 1,283 | 1,233 | -4% | 0 | 0 | — |
case-20 | pass→pass | 18,588 | 17,989 | -3% | 1 | 1 | 0% | 3,315 | 4,013 | +21% | 0 | 0 | — |
case-21 | pass→pass | 11,491 | 10,773 | -6% | 1 | 1 | 0% | 2,021 | 2,897 | +43% | 0 | 0 | — |
case-22 | pass→pass | 10,217 | 10,476 | +3% | 1 | 1 | 0% | 1,615 | 2,507 | +55% | 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 +9 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.
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.