Librarian

Librarian is one of seven classes available to choose from in the CivLabs plugin.

A Librarian's main role is to enchant player gear, and to create and fill out maps.

Unlocked Abilities

Blessing Items

A Librarian can bless an item, giving it a random enchantment. The enchants are not limited, and any valid enchant has a chance to be applied to an item. Treasure enchants, such as curses and mending, are included in the enchant pool.
The blessing has a chance to fail, as well as a chance to delete items from the players inventory, and will consume experience levels equal to the Librarian's level multiplied by 3. There is a limit to how many enchants can be blessed upon a single item, this limit is 4 enchants (not fully tested).

-> To bless an Item hold a book in your off-hand and hold the item you want to enchant in your selected hand. Now shift and right click and if you have enough levels (minecraft XP, the "green bar in the middle") you will try to bless the item. This will apply a random enchant to the selected item, but it may be incompatible which makes it not apply at all. (e.g. smite on a fishing rod) If successful it will display the blessing and person who blessed it by hovering over with the mouse. It will consume the book, the levels and sometimes just delete stuff from your inventory as mentioned above. (sidenote: so it is a good idea to strip down your armor and items if you want to not risk losing your valuables)_{confirmed 20.09.}

Equipment Blueprint

A Librarian can create blueprints for certain pieces of equipment, using the recipe below. All ingredients, including the blueprint tool, are consumed in the crafting process.
An Apprentice(1)-level or higher Blacksmith can use a blueprint to learn the recipe for the corresponding piece of equipment, until they die.

Netherite Smithing Template

At Grandmaster level, Librarians can make Netherite Smithing Templates using a custom recipe. [State recipe ingredients]

[Place image of recipe crafting table]

Misc

Librarians can make blank pattern banners (plain white, grey etc.), there is no information about the ability of making patters yet or if it is a higher tier unlock, they can also add "lore" (description) to items [unknown method].

Full List of Unlocks

Apprentice (1)

Crafting Bookshelf and Chiseled Bookshelf
Crafting Book and Quill
Crafting Lectern

Journeyman (2)

Crafting Map
Crafting and using Cartograpy Table
Crafting Copied Books
Speed II
Craft one-color Banners using colored wool
Build Loom (not use Loom)
Blessing of items (see Blessing Items)

Expert (3)

Crafting, NOT using Enchantment Table
Crafting Ender chests

Master (4)

Speed III
Using Enchanting Table

Grandmaster (5)

Crafting Netherite Smithing Template

Explanation of any shorthand, if necessary.

Gaining Experience

[Can split into multiple tables to group common sources of XP together, for example: crafting vs smelting vs mining vs another action. In which case adjust Source of XP title to match.]

Crafted Item	XP Amount	Level Required
Book	3	Novice (0)
Bookshelf	3	Apprentice (1)
Book and Quill	6	Apprentice (1)
Lectern	3	Apprentice (1)
Map	0	Journeyman (2)
Cartography Table	0	Journeyman (2)
Loom	0	Journeyman (2)

Class Interactions

Due to the reliance on other classes, Librarians will more often than note rely on other classes in order to progress.

A Librarian's access to experience points is limited, due to class experience dilution. The most common way for a Librarian to get experience is to wait in stables while a Farmer breeds the animals around them.

Enchanting tables, one of the core unlocks of Librarians, requires both diamonds and obsidians, as per its vanilla craft. This makes the presence of Miners, accompanied by Guardsmen for safety, a requirement for Librarians to unlock consistent enchants.

Guide

To reach the first knowledge level, it is recommended to have access to a sugarcane farm and a cow farm, since at this stage your only way of gaining experience is by crafting books, therefore requiring large amounts of sugarcane (paper) and leather. (sidenote: crafting the paper required for the books gives healer XP, so it makes sense to ask a healer or unspecialized player for help as well)

Once you are an Apprentice (1) the most reliable way for a Librarian to level up is to craft bookshelves, placing and breaking them before recrafting them. Crafting bookshelves gives 3 XP each and by breaking them you receive the books back. (sidenote: placing the shelves gives 1 builder XP each and breaking yields no additional librarian XP)_{confirmed 19.09}

Notes:

The Librarian is a class that is more focused around late game. Because of this there is some gap in our knowledge of how they work.

Confirmed: The Enchantment Table is an exclusive feature of the Librarian, as stated above, a level 4 (Master) Librarian is needed in order to use the Enchantment Table.

It was previously thought as false, but it has been confirmed that Librarians can indeed use a Grindstone in order to disenchant items and gain extra Minecraft experience in the process. Another great way Librarians have to gain Minecraft XP points are fishing, which can also yield enchanted items or books; the use of XP batteries; or breaking furnaces with smelted items, gaining the MC XP, but not the class XP it'd give otherwise.