BTC Skill Provides Bitcoin L1 operations using mempool.space (free, no auth) and the Unisat API (for inscription/rune/cardinal UTXO classification on both mainnet and testnet). Transfer operations require an unlocked wallet. Balance and fee queries work without a wallet. Requires environment variable for UTXO classification commands. Usage Subcommands balance Get the BTC balance for a Bitcoin address. Returns total, confirmed, and unconfirmed balances. Options: - (optional) — Bitcoin address to check (uses active wallet's btcAddress if omitted) Output: fees Get current Bitcoin fee estimates f…