README.md

---
title: Nidra
emoji: 🌙
colorFrom: indigo
colorTo: purple
sdk: gradio
app_file: app.py
pinned: true
license: mit
short_description: An AI bedtime story, narrated in your own cloned voice.
tags:
  - gradio
  - build-small-hackathon
  - agentic
  - voice-cloning
  - tts
  - bedtime
  - track:backyard
  - sponsor:nvidia
  - sponsor:openbmb
  - sponsor:modal
  - achievement:offbrand
  - achievement:fieldnotes
  - achievement:sharing
---

# 🌙 Nidra

A bedtime story, written for your kid and read in your voice.

You give a name, an age, and whatever they're into this week. A small agent writes the story; your cloned voice reads it back.

**→ [Open Nidra](https://huggingface.co/spaces/build-small-hackathon/nidra)** · **🎬 [Watch the 1-min demo](https://share.descript.com/view/FPpNJNlmCQI)** · **📣 [Post on X](https://x.com/Pushpakteja/status/2066633364510277888)** · first run warms up on Modal (~3–5 min).

## What it does

Type something like *"Arjun, 5, a curious mongoose who finds a library under a banyan tree."* Nidra writes an outline, then the full story, then narrates it line by line in the voice you upload (or a default warm one). You can download the whole agent trace if you want to see how it got there.

## How it works

Two passes of NVIDIA's Nemotron-Nano-9B — outline, then story — and then VoxCPM2 voices each sentence. The Space itself is CPU-only; all the GPU work is a serverless Modal app that scales to zero between runs.

```mermaid
flowchart LR
  A[name · age · theme] --> B[Nemotron: outline] --> C[Nemotron: story] --> D[VoxCPM2: narrate] --> E[🔊]
  V[your voice clip] --> D
```

Built by [@praxelhq](https://huggingface.co/praxelhq) for the HuggingFace **Build Small** hackathon — Backyard AI. Models: Nemotron-Nano-9B (NVIDIA) and VoxCPM2 (OpenBMB), both small, both on Modal. [Build notes](./FIELD_NOTES.md) · [agent traces shared on the Hub](https://huggingface.co/datasets/build-small-hackathon/praxy-voice-agent-traces).