Nova Mekanism

Fixed

• Two pairs of casings shared an identical crafting recipe, so one of each pair could never be made — vanilla returns the first recipe that matches a grid, and which one loses is arbitrary. The engine casing clashed with the assembly line casing (reported by a playtester), and the accelerator casing clashed with the alloy blast casing (found while checking for others, before anyone hit it). The engine casing now takes pistons and the accelerator casing takes titanium; both keep their original tier and cost.
• The Large Inscriber and Large Charger could not be built without AE2. Their controllers were craftable with an AE2-free fallback, but their casings were gated on AE2 with no fallback, so the machines were impossible to complete — the Large Charger has a non-AE2 use (charging this mod's superconductors), so this bit. Both casings gained workbench fallbacks, matching the mod's promise that every integration is optional.
• The hadron collider's blueprint placed a block on its own controller. The validator skips that cell, so the bill of materials over-counted one glass and the structure could not be laid down from its own plan.

Added — release safeguards

• Obtainability audit at startup: reports any multiblock whose controller or structure blocks have no recipe at all. This is what caught the AE2 casings.
• tools/check_recipe_collisions.ps1: normalises every crafting recipe to a shape-and-ingredients signature and reports indistinguishable pairs, correctly ignoring recipes whose mod conditions are mutually exclusive. This is what caught the second casing clash.