Lottie playback and rendering tools at pinned commits: lottie-android, lottie-react-native, ThorVG, and the LottieFiles motion-design skill

## lottie-android - Lottie for Android parses Adobe After Effects animations exported as json with Bodymovin and renders them natively. The README says Gradle is the only supported build configuration and gives a dependency line for com.airbnb.android:lottie with a version placeholder; Lottie 2.8.0 and above only supports androidx projects. - Listed limits (DESIGNER_NOTES): expressions are not supported, text is not supported, an Illustrator layer is to be converted to a shape layer or it is exported as a bitmap, and opacity is applied to individual elements rather than whole layers or groups. ## lottie-react-native - A Lottie component for React Native covering iOS, Android and Windows. On iOS and Android the README requires React Native 0.84 or newer and the New Architecture; its install line is yarn add lottie-react-native, and for web it adds the @lottiefiles/dotlottie-react dependency. On Windows, dynamic loading of JSON strings at runtime is currently only supported in C# applications. - API: the source prop is mandatory (local asset string, remote uri object or JS animation object); duration takes precedence over speed and only works with a JS animation object; the imperative API has play, reset, pause and resume. Animations that reference image assets need the native route and a full application rebuild when images change. - The v7-to-v8 migration page says v8 is not released and the page is a work in progress; it says v8 supports iOS and Android only. ## ThorVG - ThorVG is MIT-licensed per its README badge. It lists Lottie (JSON) playback and rendering among its animation features, states a wide range of supported Lottie features and platforms from web, Windows, macOS and Linux to Android, iOS and embedded systems, and lists CPU/SIMD software, OpenGL/ES, WebGL and WebGPU backends. - Build and use: the README shows a meson loaders option for a compact Lottie playback build and a C++ example that loads a Lottie file into a picture from a tvg::Animation. meson_options.txt lists the loader choices, the default loaders (svg, lottie, ttf), the default cpu engine and the extra option lottie_exp. - Expressions: ThorVG disables Lottie expression support by default and enables it with the extra build option. This differs from the lottie-android note that expressions are not supported. ## LottieFiles motion-design skill - The skill README describes universal motion design principles for AI agents, philosophy-first and implementation-agnostic, working with any animation system including CSS, Framer Motion, GSAP, Lottie and Spring. Its install line is npx skills add LottieFiles/motion-design-skill. The main skill file front matter gives license MIT. The skill contents are the repository statement and were not followed here. - What it states: Corporate is the default motion personality for UI and Playful for illustrations; the timing table gives 120-180ms for a button or toggle; the quality checklist lists fewer than 20 animated elements per viewport and a prefers-reduced-motion alternative. The skill does not itself author Lottie JSON files; it states principles, tables and checklists. ## Limits - Documentary only: eleven documentation and config files at commits 05ea92e90381 (lottie-android), 7ac5e96cfbf8 (lottie-react-native), 31c5fa37e38f (ThorVG) and f9a8a041b851 (LottieFiles motion-design-skill) were read; nothing was installed, built or run and no animation was played or rendered. - No source code was read. Other staged files (changelogs, ThorVG sub-docs, the other skill files for choreography, patterns and troubleshooting, and the lottie-react-native core and Nitro docs) were not used for claims. - Feature support is claimed only as the docs state it; which Lottie features each renderer handles for a given file was not tested, and the ThorVG Lottie support wiki page linked from its README was not read. - The Android note file (DESIGNER_NOTES) is short and undated; the repository may have changed its limits since this commit. - Licences are named from the files and the BULK packet screens, not interpreted; model, asset and animation file licences are not assessed. - The Claude terminal curator and the local Qwen researcher share the founder operator. This is source-based desk curation, not independent formal verification. - The Claude terminal curator and the local Qwen researcher share the founder operator. This is source-based desk curation, not independent formal verification.

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      "url": "https://github.com/airbnb/lottie-android/blob/05ea92e90381eb8a8ae06855ea2b74f322bebbec/README.md",
      "note": "README.md at commit 05ea92e90381"
    },
    {
      "url": "https://github.com/airbnb/lottie-android/blob/05ea92e90381eb8a8ae06855ea2b74f322bebbec/DESIGNER_NOTES.md",
      "note": "DESIGNER_NOTES.md at commit 05ea92e90381"
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    {
      "url": "https://github.com/lottie-react-native/lottie-react-native/blob/7ac5e96cfbf80789118e873d9d736dee9ecc2fd9/README.md",
      "note": "README.md at commit 7ac5e96cfbf8"
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    {
      "url": "https://github.com/lottie-react-native/lottie-react-native/blob/7ac5e96cfbf80789118e873d9d736dee9ecc2fd9/docs/api.md",
      "note": "docs/api.md at commit 7ac5e96cfbf8"
    },
    {
      "url": "https://github.com/lottie-react-native/lottie-react-native/blob/7ac5e96cfbf80789118e873d9d736dee9ecc2fd9/MIGRATION-7-TO-8.md",
      "note": "MIGRATION-7-TO-8.md at commit 7ac5e96cfbf8"
    },
    {
      "url": "https://github.com/thorvg/thorvg/blob/31c5fa37e38f284a87ebcdf909f0e0d4a142e347/README.md",
      "note": "README.md at commit 31c5fa37e38f"
    },
    {
      "url": "https://github.com/thorvg/thorvg/blob/31c5fa37e38f284a87ebcdf909f0e0d4a142e347/meson_options.txt",
      "note": "meson_options.txt at commit 31c5fa37e38f"
    },
    {
      "url": "https://github.com/LottieFiles/motion-design-skill/blob/f9a8a041b85185ee4881b3471d3415e939aac772/README.md",
      "note": "README.md at commit f9a8a041b851"
    },
    {
      "url": "https://github.com/LottieFiles/motion-design-skill/blob/f9a8a041b85185ee4881b3471d3415e939aac772/skills/motion-design/SKILL.md",
      "note": "skills/motion-design/main skill file at commit f9a8a041b851"
    },
    {
      "url": "https://github.com/LottieFiles/motion-design-skill/blob/f9a8a041b85185ee4881b3471d3415e939aac772/skills/motion-design/reference/quality-checklist.md",
      "note": "skills/motion-design/reference/quality-checklist.md at commit f9a8a041b851"
    },
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      "url": "https://github.com/LottieFiles/motion-design-skill/blob/f9a8a041b85185ee4881b3471d3415e939aac772/skills/motion-design/reference/timing-easing-tables.md",
      "note": "skills/motion-design/reference/timing-easing-tables.md at commit f9a8a041b851"
    }
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