License NETfishing code and define asset terms

ASSET-LICENSE.md

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+# NETfishing Asset License 1.0
+
+Copyright © 2026 Alexander Sellite and Rheannon Eisworth. All rights
+reserved except for the permissions expressly granted below.
+
+## 1. Scope
+
+This license applies to original NETfishing artwork, graphics, textures,
+models, animations, music, sound recordings, narrative content, visual
+designs, characters, and other creative assets owned by Alexander Sellite and
+Rheannon Eisworth (the **“NETfishing Assets”**).
+
+It does not apply to:
+
+- software source code identified as GPL-3.0-or-later;
+- third-party material identified in `THIRD-PARTY-NOTICES.md`;
+- material accompanied by a different license; or
+- the NETfishing and Woofmeow names and logos, which are addressed in
+  `TRADEMARKS.md`.
+
+Repository location alone does not change third-party ownership or licensing.
+
+## 2. Definitions
+
+**Official NETfishing Software** means:
+
+- an unmodified binary release published by the NETfishing owners through an
+  official NETfishing distribution channel; or
+- a build made from an unmodified official NETfishing source release or tagged
+  revision.
+
+**Mod** means a non-standalone add-on created to operate with Official
+NETfishing Software. A Mod may add, replace, or alter content loaded by the
+Official NETfishing Software, but it may not redistribute a replacement copy
+of the game or represent a fork, clone, sequel, or separate game.
+
+## 3. Permission to use the official game
+
+You may reproduce NETfishing Assets as technically necessary to install, run,
+back up, and privately modify a lawfully obtained copy of Official NETfishing
+Software.
+
+You may capture, publish, and monetize screenshots, gameplay videos,
+livestreams, reviews, tutorials, and similar commentary showing a lawfully
+obtained copy of NETfishing. This permission does not authorize redistribution
+of the source asset files or imply endorsement.
+
+## 4. Community Mod license
+
+Subject to this license, you may create, modify, and distribute NETfishing
+Assets solely as part of a Mod for Official NETfishing Software.
+
+This permission is worldwide, nonexclusive, royalty-free, and available for
+as long as you comply with this license. It permits only the copies of
+NETfishing Assets reasonably necessary for the Mod to function. It does not
+permit distributing the original game, a substantially complete collection of
+its assets, or a general-purpose asset pack.
+
+A distributed Mod must:
+
+1. require a separately obtained copy of Official NETfishing Software;
+2. be presented as unofficial community content;
+3. include the following notice in its documentation or distribution page:
+
+   > Contains or adapts NETfishing assets © 2026 Alexander Sellite and
+   > Rheannon Eisworth, used under the NETfishing Asset License 1.0. This Mod
+   > is unofficial and is not endorsed by Woofmeow.
+
+4. identify material created by the Mod author separately from NETfishing
+   Assets; and
+5. comply with `TRADEMARKS.md`.
+
+Mods may be shared without charge and may accept voluntary donations that do
+not purchase access, features, or preferential treatment. Selling a Mod,
+charging for access to it, licensing it commercially, or using NETfishing
+Assets in paid products requires separate written permission from both
+NETfishing owners.
+
+## 5. Uses not permitted
+
+Except with separate written permission from both NETfishing owners, you may
+not use or distribute NETfishing Assets:
+
+- in a fork, clone, remake, sequel, or standalone game;
+- with a modified distribution of the GPL-covered NETfishing code that is not
+  Official NETfishing Software;
+- in another game, application, asset library, template, or merchandise;
+- as a substantially complete asset extraction or archive;
+- in a way that implies sponsorship, endorsement, or official status;
+- to register a confusingly similar trademark, domain, account, or product
+  identity; or
+- under terms that claim ownership of the NETfishing Assets themselves.
+
+The GPL permits forks and redistribution of the GPL-covered code. This asset
+license does not permit those forks to carry NETfishing Assets. A code fork
+must remove or replace the NETfishing Assets and reserved branding unless both
+owners grant separate written permission.
+
+## 6. Ownership of Mods
+
+You retain ownership of your original Mod material. Alexander Sellite and
+Rheannon Eisworth retain ownership of the NETfishing Assets and adaptations of
+those assets to the extent provided by applicable law.
+
+This license does not require you to assign your original Mod material to the
+NETfishing owners. It also does not grant you ownership of the underlying
+NETfishing Assets.
+
+## 7. Termination and cure
+
+Your permissions under this license terminate automatically if you violate
+its terms. They are reinstated provisionally when you stop the violation and
+permanently if both NETfishing owners do not notify you of the violation
+within sixty days after it has been cured.
+
+Termination does not limit remedies available for activity outside this
+license.
+
+## 8. No warranty
+
+THE NETFISHING ASSETS ARE PROVIDED “AS IS,” WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE, TITLE, OR NON-INFRINGEMENT. TO THE MAXIMUM EXTENT
+PERMITTED BY LAW, THE OWNERS WILL NOT BE LIABLE FOR ANY CLAIM, DAMAGES, OR
+OTHER LIABILITY ARISING FROM THIS LICENSE OR USE OF THE NETFISHING ASSETS.
+
+## 9. Additional permission
+
+Uses not granted here require written permission from both Alexander Sellite
+and Rheannon Eisworth. A permission granted to one person or project does not
+amend this license for others.
+
+This is a custom asset license, not an open-source software license or a
+Creative Commons license.