Witchery: Companion is a companion mod for the Witchery Resurrected mod, a faithful 1.12.2 recreation of the Witchery mod. Unfortunately, while the mod is mostly finished content-wise, it is infested with many little (and important) bugs that really makes it not ready for large modpack usage.

This is when this mod kicks in. Using Mixins, this mod patches tens of bugs, crashes and glitches and adds integration with CraftTweaker, JEI and Just Enough Resources.

The mod is still in active development, and aims to make W:R more modpack-ready and customizable.
This mod requires Witchery: Resurrected and MixinBooter to run

Witchery: Resurrected requires the original 1.7.10 Witchery mod to be installed into the resourcepacks folder. This mod downloads it automatically on game startup, handling this step for you.

A list of current features is available at the Github Repo
A non-exhaustive list highlighting the most important features:

Bugfixes:

Fix Altar Disconnection bug
Fix and enhance Triggered Disperal brews (can also be applied on tripwires and TileEntities!)
Fix familiars forgetting owners on world reload
Fix Ghost entities when changing dimensions
Fix Server Freeze when Enchanted Broom is broken while player is riding it
Fix Mystical Branch Knowledge being lost upon death

Integrations & Features

JEI integration for Hobgoblin trades, Imp shines and gifts, Mutandis and more
JER integration for a most mobs and bosses
The One Probe integration for Altar, Cauldron, Hobgoblin, and many blocks and entities
Compat and bugfix for other mods, such as Morph, Quark, Thaumcraft and CubicChunks
Crafttweaker integration for the main devices (Cauldron, Kettle, Brazier and Spinning Wheel) among with lesser ones, like Altar Power Sources, Brew of Erosion behaviour, Cauldron heat sources, Bark Belt rechargers and more (documentation about CraftTweaker and API on the Wiki)
Baubles Integration Moon Charm and Charm of Fanciful Thinking can be equipped in the Charm Bauble slot
Revamped documentation with Patchouli, with a much more complete guide, links, more information and details, lots of configuration, possibility to customize by pack makers and multiblock preview (sprig mutations, structures, worldgen structures)
Improved Cross-mod interaction, by fixing how Witchery plays with mods like Thaumcraft, Tinkers Construct, Quark and Morph
And ~80 more fixes, tweaks, integrations and features. Full list available at Github Readme