PR #123: Mutation testing

Agent Instructions

Click a suite to see its builds. Example suite for 2ff6349d :

https://staging.nix-ci.com/gh:NorfairKing:sydtest/refs%2Fpull%2F123%2Fmerge/2ff6349d01abde86d571c003b5bacf14dc1e4a42

For more instructions, fetch https://staging.nix-ci.com/instructions .