The mod adds an in-game editor which you can use to alter the characteristics of your bros.
You can:
1) Manually change the following characteristics of bros:
- attributes (also action points, daily wage and food consumption) and talents;
- perk points and experience;
- traits and permanent injuries;
- background (BG button);
- biography (not recommended if you use mods that store extra info in bros' biographies, such as Smart Recruiter for Legends, the special formatting of those sections will be lost if you try to edit them);
- hair color and beard color (anything you wish - red, green, pink, whatever).
2) Export and import together or separately the following chunks of info about bros:
- their characteristics (ALL of them except hair color);
- their lifetime statistics (number of kills, strongest enemy killed etc. - in Legends it also includes data used for "favoured enemy" perks);
- their currently equipped gear (should be fully compatible with Armorsmith and mostly compatible with other mods that add items that are based on standard templates and don't have special varying properties).
All 3 chunks of into exported and then imported into multiple bros => clone army.
Do not ever attempt to export/import bros between Legends and Vanilla. And do it with caution between different versions of the game or Legends.
3) Drink oblivion potion (resets perks) and the water from the fountain of youth (heals all injuries and their visible effects, also the same button makes your bro happy - an equivalent of happy powder, but no side effects).
4) Choose and generate named items and manually set their characteristics.
5) Add a bunch of other items to your inventory (legendary gear, armor attachments, some accessories etc.). Ordinary, common items (basic weapons, armor etc.) are unavailable because it's easier to just buy them at a shop, I don't want to overload the mod with hundreds of redundant objects. There is simply nothing Breditor can give you in this regard that Armourer or Weaponsmith can't because one can't edit stats of non-named items anyway.
Most buttons (also images of traits and backgrounds) have tooltips attached to them so read them before using them to fully understand how they work and their possible limitations/warnings (when such exist).
Extra features of Legends version:
- adding and removing perks and perk groups from your perk tree;
Legends version supports layered gear only and was only thoroughly tested on dynamic perks ON and layered gear ON.
When using Legends version, make sure to read the warnings on the tooltips of BG button as well as perk buttons.
When scrolling through types of named items, named items, named items' stats, perk classes and subclasses, you can use left mouse button to scroll forward (as before) or right mouse button to scroll backwards (version 3.1+).

All the mod functions were tested to make sure that they do what they're supposed to do without causing any errors but I bear no responsibility for long-term implications of "extreme" changes, so if you want to give your bro -10 HP, 100 Action Points, both Pessimist and Optimist traits, all 6 cultist traits, a hammer with 500% armor penetration and a retinue of king's guards (background that's supposed to be unique), do it at your own risk since it may "break" the game during some events and the like. Outside of tests, I do not recommend using this mod to get things that are absolutely impossible to obtain via "legal" means: impossible combinations, unachievably high/low stats etc. that the game simply may not support.
Missing stuff that I'm aware of (so don't report it): barbarian background (Vanilla), missing hand injury (Legends) - because they cause bugs.

Launching:
Breditor can be opened from the world map and world map only by clicking SHIFT+X (btw, SHIFT is already used by the game to center camera on your party, so if after using it you can't "unfreeze" your camera, just click any of WASD buttons).
Since hotkey combos on the world map can be a bit laggy/unresponsive, the best way to open Breditor is to hold SHIFT with one hand and press X with quick and firm move with another hand.

Compatibility:
- not compatible with any mods that modify main.html (script hooks don't count, with their author's permission I merged his main.html with mine), screens.js (yes, sounds big but I'm not sure any mods but Legends actually modify this file since it's used for registering new screens) and input.js;
- may conflict with mods that also add world map hotkeys for SHIFT and/or X (Debug Mode Tool is the only one I know that adds many hotkeys but it does not use X or SHIFT so it shouldn't conflict with Breditor);
- editing perk points is not compatible with Ultra Bros mod;
- Legends version (usually for the last test build either from Nexus or Legends discord) is available;
- should be compatible with pretty much everything else (but will likely not see traits/backgrounds etc. added by other mods).

Requirements:
Tested on BB 1.4.0.47 with Blazing Deserts. The mod requires all DLCs to be installed.
Requires script hooks (only vanilla version, Legends already have them, so always delete hooks when you play Legends).

Installation:
Download the .zip file, put it into [BB]/data folder without unpacking (don't unpack any mods ever and never put any non-zipped files in the data folder).
Do not rename the archive and/or make sure it alphabetically follows script hooks (or - in case of Legends - the archive with Legends) but precedes the other mods.
Never use multiple versions of Breditor (such as Vanilla and Legends) at the same time. There can be only 1 Breditor in your Data folder and it has to match what you currently play: Legends or Vanilla. Make sure you installed the right version, 99% of "it doesn't work" bug reports come from people who installed the wrong version. Descriptions of files specifically say what they are for: Legends or Vanilla and which version of it.

If you encounter any bugs:
1. Make sure that you use the right version of the mod with the right version of Vanilla/Legends and that you followed the installation instruction carefully.
2. Upload your full log somewhere like google drive, dropbox, yandex disk etc. and give me the link (you can also contact me via Legends or BB discord. My nickname there is also Leonion and I never change it). Please don't copy pieces of log and don't post these walls of text in the comments.
"Your log is found in: C:\Users\YourName\Documents\Battle Brothers\log.html
The log is constantly updated during game and is reset each time you open the game."

Credits:
Overhype Studios for the game's original code (no way I'd script that screen from scratch if I had no examples of how things are done before my eyes), guys from Legends Discord channel for helping me with tips.