SEMI Auto Runecrafting for Melvor Idle is a free mod designed for Windows that enhances the gameplay experience by automating the crafting of runes. This tool offers three distinct crafting modes: Linear, Lowest Cast, and Endless, allowing users to optimize their rune production based on personal preferences or game strategies. The mod's core functionality revolves around crafting ratios, which can be easily set according to the spell costs, streamlining the process of rune creation significantly.

The mod also features a Sync Combat Runes button, enabling players to copy ratios directly from their spellbook, ensuring accuracy in crafting. Users can set upper limits on the number of runes crafted using Linear or Lowest Cast modes, while Endless mode focuses on maximizing efficiency by continuously crafting the rune that requires the least amount. It’s important to note that this mod may have compatibility issues with certain auto mining mods, which can be resolved by adjusting the settings accordingly.