villain-mint
This skill mints a Fellow Villain NFT on Solana by obtaining a challenge and a partially-signed transaction from `https://chum-production.up.railway.app/api`, then having the agent locally sign and submit the transaction. It issues HTTPS calls to `https://chum-production.up.railway.app/api` and instructs local use of the Solana private key for signing; no secret exfiltration is instructed.