shamir-mnemonic is a Python implementation of SLIP-0039, a standard for splitting secrets into multiple mnemonic word shares using Shamir's Secret Sharing scheme. It is designed primarily for use with cryptocurrency wallets and hardware devices, enabling secure backup and recovery of sensitive secrets through human-readable word lists. The library provides tools for generating mnemonic shares, combining shares to recover secrets, and validating share sets, while remaining compatible with SLIP-0039 implementations used by Trezor and related ecosystems.