Add README with attribution to Google + upstream litert-community

README.md

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+---
+license: gemma
+base_model: google/translategemma-4b-it
+pipeline_tag: text-generation
+tags:
+  - translation
+  - on-device
+  - mediapipe
+  - litert
+  - gemma
+  - flutter_gemma
+library_name: mediapipe
+---
+
+# atlas-associates/TranslateGemma-4B-IT
+
+This repository is a **mirror / redistribution** of [`litert-community/TranslateGemma-4B-IT`](https://huggingface.co/litert-community/TranslateGemma-4B-IT) provided under the [Gemma license](https://ai.google.dev/gemma/terms).
+
+## Why this mirror exists
+
+[Arc](https://www.atlasassociates.io/) — a privacy-first end-to-end-encrypted messenger — uses TranslateGemma 4B as the on-device translation engine ("Rosetta") via the `flutter_gemma` package + MediaPipe LLM Inference. The upstream `litert-community` repository is **gated** (requires a Hugging Face login + Gemma license acknowledgement per user). Distributing the model through this mirror lets Arc download the model from end users' devices without bundling a Hugging Face access token in the Arc app or in app-config Firestore.
+
+By downloading the model file from this mirror, you implicitly accept the upstream Gemma license terms. Atlas Associates Inc. acts only as a distribution mirror; the model weights are the property of Google.
+
+## Attribution
+
+| Item | Source |
+|---|---|
+| Original model weights | Google ([`google/translategemma-4b-it`](https://huggingface.co/google/translategemma-4b-it)) |
+| LiteRT-LM `.task` packaging | Google AI Edge / LiteRT community ([`litert-community/TranslateGemma-4B-IT`](https://huggingface.co/litert-community/TranslateGemma-4B-IT)) |
+| License | [Gemma Terms of Use](https://ai.google.dev/gemma/terms) |
+| Mirror operator | Atlas Associates Inc. (this repository) |
+
+## Files
+
+| File | Size | Format | Notes |
+|---|---|---|---|
+| `translategemma-4b-it-int8-web.task` | ~3.63 GiB | MediaPipe LiteRT `.task` (int8, GPU/CPU) | Verbatim copy of the upstream file (`sha256` matches upstream). |
+
+## Usage
+
+This file is consumed by the [`flutter_gemma`](https://pub.dev/packages/flutter_gemma) package via:
+
+```dart
+await FlutterGemma.installModel(modelType: ModelType.gemmaIt)
+    .fromNetwork(
+      'https://huggingface.co/atlas-associates/TranslateGemma-4B-IT/resolve/main/translategemma-4b-it-int8-web.task',
+      foreground: true,
+    )
+    .install();
+```
+
+The model runs entirely on-device — no data is sent to any server during inference. See [Rosetta on-device translation in Arc](https://www.atlasassociates.io/arc) for the user-facing product context.
+
+## License
+
+Gemma — see [https://ai.google.dev/gemma/terms](https://ai.google.dev/gemma/terms) and the `LICENSE` file in this repository.
+
+By downloading, you agree to the Gemma Terms of Use as specified by Google. The terms include responsible-use commitments and prohibited-use limitations that you must read and comply with.
+
+## Contact
+
+Issues with the **mirror itself** (broken file, missing version, takedown requests):
+- [Atlas Associates Inc. contact](https://www.atlasassociates.io/)
+- Open an issue on [GitHub: Atlas-Associates-Inc/Arc-V2](https://github.com/Atlas-Associates-Inc/Arc-V2/issues)
+
+Issues with the **model behavior** (translation quality, performance):
+- Refer upstream: [`google/translategemma-4b-it`](https://huggingface.co/google/translategemma-4b-it) and [`litert-community/TranslateGemma-4B-IT`](https://huggingface.co/litert-community/TranslateGemma-4B-IT).