THE A/O LICENSE
Version 1, 2026-07-27

The canonical, always-current text of this license is published at:

https://0vergrown.github.io/Handbook/license

Where that page and this file disagree, the page is authoritative.

PREAMBLE

Apoli and Origins are distributed under a reasonably open license. Have a read
through this if you want to do anything with them beyond playing.

You are free to USE, SHARE and ADAPT both mods. Those rights cannot be taken
away from you as long as you follow the terms below.

If you just want to play, or you are building a data pack or an addon, none of
this is likely to affect you. See section 4, "Build on Apoli", and carry on.

1. GENERAL CLAUSES

These apply on top of every other section in this license.

1.1 Extent
This license covers Apoli, Origins, the Handbook website, and all other
code, assets and binaries in their repositories, unless a file says
otherwise. Where a bundled file carries its own license, that one wins
for that file.

1.2 Waiver
Any restriction in this license can be set aside with personal
permission. Read clause 1.3 before asking.

1.3 Personal Permission
Personal permission is granted rarely and usually only where there's a
good reason for it, because granting it reads as an endorsement. If what
you want to do is already allowed below, you do not need to ask, and
asking will most likely just get you pointed back at this license.

1.4 Informal
This license will not hold up in court, and there is no intention of
taking anyone to one. The realistic worst case for breaking it is being
asked to put it right. Though a distribution platform such as Modrinth
or CurseForge may take your project down. Breaking it also makes you a
jerk, and you don't want to be a jerk, do you?

2. IF YOU WANT TO DISTRIBUTE THE MODS

Making the binaries, assets or source available from somewhere other than
the original download pages: in a modpack, on a mirror, or bundled with a
server.

2.1 Modpack (ALLOWED)
You may put either mod in a modpack without asking. That is what they
are for. This holds whether the pack is public, private, or for one
server.

2.2 Attribution
Credit Overgrown as the author of the parts you are distributing. If you
changed anything, say that you did. A link back is optional but
appreciated.

2.3 Non-Monetary (NOT ALLOWED)
You may not charge for access to the distribution or otherwise make
money from it. That includes ad-gated links and URL shorteners, download
services that slow you down unless you pay, and putting any part of the
download behind a paywall. Selling in-game goods or cosmetics on a
server is not distribution and is between you and the Minecraft EULA.

3. IF YOU WANT TO FEATURE THE MODS

Using either mod somewhere you are not handing out binaries, assets or
source: a video, a stream, a review, a public server, and so on.

3.1 Free Rein (ALLOWED)
Go ahead. You do not need permission, you do not need to ask, and you
may monetise the video or stream as usual. The Non-Monetary Clause
(2.3) is about distributing the files, not about your content.

3.2 Thief (NOT ALLOWED)
Do not claim you made either mod. Crediting Overgrown makes you cooler,
but it is not required.

4. IF YOU WANT TO BUILD ON APOLI

Writing a data pack, or a Java addon that registers its own power, action
and condition types against the Apoli API.

4.1 Data Pack (ALLOWED)
Data packs and resource packs you write are entirely yours. Powers,
origins, layers and badges are your content, not a derivative of the
mod, and nothing in this license applies to them. License and sell them
however you like.

4.2 Addon (ALLOWED)
An addon that depends on Apoli and calls its API is NOT a derivative
work of it. Your addon is yours, under any license you choose
(including a closed one) as long as you do not copy Apoli's own code
into it. This is the whole point of the engine; the Addon docs
(https://0vergrown.github.io/Handbook/docs/addon) exist so you can do
exactly this.

4.3 Compatibility (ALLOWED)
You may ship compatibility code for Apoli or Origins in your own mod,
including mixins into them, without asking. Please prefer the public API
where one exists so your compat does not break every update.

5. IF YOU WANT TO USE THE CODE OR ASSETS

Copying source, textures or models out of either mod into your own project,
or forking one of them. This is the one section with real conditions
attached.

5.1 Attribution
Credit Overgrown as the author of the parts you are using, and say so if
you altered them.

5.2 Copyleft
Your project must be open source — source visible, redistribution and
modification allowed — and must carry a clause much like this one.

5.3 Fork (ALLOWED)
You may fork either mod, including to keep an old version alive or to
take it somewhere it is not going. Give it a distinct name and mod id so
nobody installs yours expecting this one.

5.4 Upstream
Both mods are reimplementations of apace100's original Apoli and Origins
and inherit obligations from them. Where any file traces back to that
work, its original license travels with it, and this license cannot
remove those terms.

NO WARRANTY

The software is provided "as is", without warranty of any kind, express or
implied. The author is not liable for any claim, damages or other liability
arising from the software or its use.

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Presentation and clause structure adapted, with thanks, from the Psi License
(https://psi.vazkii.net/license.php) by Vazkii.

Overgrown's Origins