# NOTICE — Third-Party Model Attribution

This repository contains mirrors of open-source AI models and support files
used by the ChatBack Android app. All models run 100% on-device.

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## Gemma 3 1B-IT
- **Author:** Google
- **License:** Gemma Terms of Use (see LICENSE-gemma)
- **Format:** LiteRT `.task` (INT4 quantised)
- **Original:** https://huggingface.co/0x3/gemma3-1b-it-int4.task
- **Converted by:** 0x3 (community)
- **Used for:** All chatroom AI features + AI Chat fallback

## Gemma 4 E2B-IT
- **Author:** Google
- **License:** Gemma Terms of Use (see LICENSE-gemma)
- **Format:** LiteRT `.litertlm`
- **Original:** https://huggingface.co/google/gemma-4-e2b-it
- **Used for:** Optional AI Chat upgrade (best quality)

## Gemma 4 E2B-IT Abliterated
- **Author:** Google (model); abliteration by community
- **License:** Gemma Terms of Use (see LICENSE-gemma)
- **Format:** LiteRT `.litertlm`
- **Used for:** Optional AI Chat upgrade — NSFW/uncensored variant
- **Note:** Safety alignment removed. Only accessible when NSFW mode is enabled.

## Piper TTS voices (Amy, Lessac, LibriTTS-R, Ryan, Joe)
- **Author:** rhasspy / Piper contributors
- **License:** MIT (see LICENSE-piper)
- **Original:** https://huggingface.co/rhasspy/piper-voices
- American English medium-quality VITS ONNX models

## Kokoro TTS English v1.0 (q8f16 ONNX)
- **Author:** Kokoro TTS project (hexgrad); ONNX export by onnx-community
- **License:** Apache 2.0 (see LICENSE-kokoro)
- **Original model:** https://huggingface.co/onnx-community/Kokoro-82M-v1.0-ONNX
- 28 English voices (American & British, female & male)
- Mixed int8-weight / float16-activation quantization for better quality than pure int8
- `voices.bin` + `tokens.txt` from csukuangfj/sherpa-onnx-kokoro-multi-lang-v1_0 (compatible format)
- espeak-ng data NOT included — app uses its own Java IPA phonemizer

## Sherpa-ONNX
- **Author:** k2-fsa / Next-gen Kaldi
- **License:** Apache 2.0 (see LICENSE-sherpa-onnx)
- **Original:** https://github.com/k2-fsa/sherpa-onnx
- Provides voices.bin and tokens.txt format used by the app