If #295 is merged, the CraftTweaker integration page of the wiki must be adapted as follows:

At https://github.com/the-realest-stu/Rustic/wiki/CraftTweaker-Support#alchemy-recipes, in the full method description, replace the bullet point bottle by:

• bottle is the bottle required in the bottle slot. If left-out, it defaults to a vanilla glass bottle. If null, no bottle is required (WARNING: do not use items that can be used as fuel in a furnace as bottles, otherwise the recipe cannot be automated. See the Alchemy page for details)

After the bullet list, replace the phrase by:

All optional parameter can be left out, but cannot be skipped. You can use null to leave an optional parameter (but not time, see also bottle) to its default.