<!-- # COPYRIGHT NOTICE # This file is part of the "Universal Biomedical Skills" project. # Copyright (c) 2026 MD BABU MIA, PhD <md.babu.mia@mssm.edu> # All Rights Reserved. # # This code is proprietary and confidential. # Unauthorized copying of this file, via any medium is strictly prohibited. # # Provenance: Authenticated by MD BABU MIA -->

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name: 'raffle-winner-picker' description: 'Picks random winners from lists, spreadsheets, or Google Sheets for giveaways, raffles, and contests. Ensures fair, unbiased selection with transparency.' measurable_outcome: Execute skill workflow successfully with valid output within 15 minutes. allowed-tools:

• read_file
• run_shell_command

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Raffle Winner Picker

This skill randomly selects winners from lists, spreadsheets, or Google Sheets for giveaways and contests.

When to Use This Skill

• Running social media giveaways
• Picking raffle winners at events
• Randomly selecting participants for surveys or tests
• Choosing winners from contest submissions
• Fair distribution of limited spots or resources
• Random team assignments

What This Skill Does

1. Random Selection: Uses cryptographically random selection
2. Multiple Sources: Works with CSV, Excel, Google Sheets, or plain lists
3. Multiple Winners: Can pick one or multiple winners
4. Duplicate Prevention: Ensures the same person can't win twice
5. Transparent Results: Shows the selection process clearly
6. Winner Details: Displays all relevant information about winners

How to Use

From Google Sheets

Pick a random row from this Google Sheet to select a winner 
for a giveaway: [Sheet URL]

From Local File

Pick 3 random winners from entries.csv

From List

Pick a random winner from this list:
- Alice (alice@email.com)
- Bob (bob@email.com)
- Carol (carol@email.com)
...

Multiple Winners

Pick 5 random winners from contest-entries.xlsx, 
make sure no duplicates

Example

User: "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

Features

Fair Selection

• Uses secure random number generation
• No bias or patterns
• Transparent process
• Repeatable with seed (for verification)

Exclusions

Pick a random winner excluding previous winners: 
Alice, Bob, Carol

Weighted Selection

Pick a winner with weighted probability based on 
the "entries" column (1 entry = 1 ticket)

Runner-ups

Pick 1 winner and 3 runner-ups from the list

Example Workflows

Social Media Giveaway

1. Export entries from Google Form to Sheets
2. "Pick a random winner from [Sheet URL]"
3. Verify winner details
4. Announce publicly with timestamp

Event Raffle

1. Create CSV of attendee names and emails
2. "Pick 10 random winners from attendees.csv"
3. Export winner list
4. Email winners directly

Team Assignment

1. Have list of participants
2. "Randomly split this list into 4 equal teams"
3. Review assignments
4. Share team rosters

Tips

• Document the process: Save the timestamp and method
• Public announcement: Share selection details for transparency
• Check eligibility: Verify winner meets contest rules
• Have backups: Pick runner-ups in case winner is ineligible
• Export results: Save winner list for records

Privacy & Fairness

✓ Uses cryptographically secure randomness ✓ No manipulation possible ✓ Timestamp recorded for verification ✓ Can provide seed for third-party verification ✓ Respects data privacy

Common Use Cases

• Newsletter subscriber giveaways
• Product launch raffles
• Conference ticket drawings
• Beta tester selection
• Focus group participant selection
• Random prize distribution at events

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