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Third-Party MilkRust Content Policy

MilkRust should support old MilkDrop ecosystem content broadly, but the repo should only redistribute content with clear redistribution permission.

Content Types

MilkRust content imports should cover:

  • .milk and .milk2 presets.
  • .shape and .wave fragments.
  • Textures and sprites: .png, .jpg, .jpeg, .webp, .bmp, .jfif.
  • Shader snippets and saved shader injections.
  • MilkDrop3-style saved images embedded in presets.
  • Playlist, favorites, history, rating, and search/filter metadata.
  • Transition, automation, beat-change, and saved-panel settings.
  • Preview thumbnails and generated compatibility reports.

Copy Policy

  • include: content can be committed into this repo and shipped in builds.
  • optional-download: tooling may fetch it on user request, but it is not shipped by default.
  • link: repo/builds may link to the upstream source, but must not copy the content.
  • review: license/provenance is not yet clear enough to decide.
  • community-unlicensed: public historical/community content imported into content/community-unlicensed for compatibility work, separated from vetted redistributable packs and excluded from default builds.
  • reject: do not copy, fetch, package, or link as a MilkRust source.

License Gate

Allowed for vendoring:

  • MilkRust-owned content.
  • Public domain or CC0.
  • Permissive licenses such as MIT, BSD, Apache-2.0, ISC, and Zlib.
  • Creative Commons licenses that permit redistribution, with attribution captured in the pack manifest.
  • GPL/LGPL/AGPL-compatible content only when the content license is explicitly declared and distribution obligations are documented.

Not allowed for vendoring:

  • No explicit license.
  • Licenses that forbid redistribution, commercial use, modification, or sublicensing in ways that conflict with MilkRust releases.
  • Packs that are only distributed through an installer or binary without source-content license terms.
  • Images, sprites, screenshots, fonts, or logos with unclear ownership.

No-license historical MilkDrop presets are common. Those should be link-only by default, even if upstream projects have used them for many years. Upstream claims that no-license presets are "safe to assume" public domain should be recorded as provenance, but should not be treated as an explicit public-domain dedication for vendoring.

Repo Model

  • content/catalog.json is the source catalog.
  • content/third-party/<pack-id>/ is only for audited and vendorable content.
  • content/community-unlicensed/<pack-id>/ is for aggressive community imports with unclear/no explicit license.
  • content/generated/ is for generated inventories, compatibility matrices, and pack indexes.
  • docs/THIRD_PARTY_CONTENT_AUDIT.generated.md is regenerated from catalog/local scans.

Build Model

Default builds should include MilkRust-owned content and vetted redistributable packs only.

Community-unlicensed content should be opt-in for packaging and release builds. It can be present in the repository for compatibility testing and user-accessible libraries, but it must stay clearly marked and removable.

Optional content can be supported through:

  • Runtime URL catalogs.
  • User-selected local folders.
  • Pack manifests that point to upstream download pages.
  • Compatibility reports generated from user-provided local copies.

This keeps MilkRust compatible with old MilkDrop packs while separating vetted redistributable content from aggressive community imports that may need removal later.