Chore: Clarify third-party licences for bundled assets and grammar

3 files changed, 84 insertions, 3 deletions

diff --git a/LICENSE b/LICENSE
index 2cf9f45..052ff1c 100644
--- a/LICENSE
+++ b/LICENSE
@@ -2,6 +2,11 @@ BSD 2-Clause License
 
 Copyright 2026 David Czihak
 
+This license applies to the source code of this extension. Bundled image
+and icon assets, and the vendored Tree-sitter Zig grammar, are covered
+by separate licenses; see NOTICES.md for details.
+
+
 Redistribution and use in source and binary forms, with or without modification,
 are permitted provided that the following conditions are met:
 
diff --git a/NOTICES.md b/NOTICES.md
new file mode 100644
index 0000000..3ee7700
--- /dev/null
+++ b/NOTICES.md
@@ -0,0 +1,66 @@
+# Third-Party Notices
+
+This Nova extension bundles material under licenses different from the
+BSD 2-Clause license that covers its own source code (see `LICENSE`).
+Each section below identifies the affected files and the license that
+governs them.
+
+---
+
+## Zig Software Foundation logo — CC BY-SA 4.0
+
+The following image and icon assets are derivatives of the Zig
+programming language logo, which is the work of the
+[Zig Software Foundation](https://ziglang.org) and is licensed under
+[Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)](https://creativecommons.org/licenses/by-sa/4.0/):
+
+- `extension.png`
+- `extension@2x.png`
+- `Images/zig-debug/zig-debug.png`
+- `Images/zig-debug/zig-debug@2x.png`
+- `Resources/Zig@32px.af`
+
+These assets remain licensed under CC BY-SA 4.0; redistribution must
+retain that license and provide attribution to the Zig Software
+Foundation. They are *not* covered by the BSD 2-Clause license that
+applies to the rest of this repository.
+
+The `@2x` variants and the `.af` icon were rasterised and pixel-aligned
+from the original logo; no other changes were made.
+
+---
+
+## Vendored tree-sitter-zig grammar — MIT
+
+The compiled parser shipped at `Syntaxes/libtree-sitter-zig.dylib` is
+built from the Tree-sitter grammar at
+[github.com/tree-sitter-grammars/tree-sitter-zig](https://github.com/tree-sitter-grammars/tree-sitter-zig).
+The pinned upstream commit is recorded in
+`vendor/tree-sitter-zig/VENDORING.md`.
+
+The grammar is distributed under the MIT License:
+
+> The MIT License (MIT)
+>
+> Copyright (c) 2024 Amaan Qureshi <amaanq12@gmail.com>
+>
+> Permission is hereby granted, free of charge, to any person obtaining a copy
+> of this software and associated documentation files (the "Software"), to deal
+> in the Software without restriction, including without limitation the rights
+> to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+> copies of the Software, and to permit persons to whom the Software is
+> furnished to do so, subject to the following conditions:
+>
+> The above copyright notice and this permission notice shall be included in all
+> copies or substantial portions of the Software.
+>
+> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+> IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+> FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+> AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+> LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+> OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+> SOFTWARE.
+
+The unmodified upstream copy of this license is preserved at
+`vendor/tree-sitter-zig/LICENSE`.
diff --git a/README.md b/README.md
index 46218d9..16c6443 100644
--- a/README.md
+++ b/README.md
@@ -80,8 +80,18 @@ Validate the extension bundle:
 /Applications/Nova.app/Contents/SharedSupport/nova extension validate .
 ```
 
-## Attributions
+## License
 
-The Zig logo is the work of the [Zig Software Foundation](https://ziglang.org) and is licensed under [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/). The zig-debug@2x.png is a derivative of the original logo, improving pixel alignment at 32px size.
+The extension's source code is licensed under the BSD 2-Clause License
+(see [`LICENSE`](LICENSE)). Bundled assets and vendored third-party
+code carry their own licenses, documented in
+[`NOTICES.md`](NOTICES.md):
 
-The Tree-sitter grammar for Zig is sourced from [github.com/tree-sitter-grammars/tree-sitter-zig](https://github.com/tree-sitter-grammars/tree-sitter-zig).
+- The Zig logo and the icon/image assets derived from it
+  (`extension.png`, `extension@2x.png`, `Images/zig-debug/*.png`,
+  `Resources/Zig@32px.af`) are the work of the
+  [Zig Software Foundation](https://ziglang.org) and remain licensed
+  under [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/).
+- The Tree-sitter grammar for Zig is sourced from
+  [github.com/tree-sitter-grammars/tree-sitter-zig](https://github.com/tree-sitter-grammars/tree-sitter-zig)
+  and is distributed under the MIT License.