| --- |
| title: OverThinker |
| emoji: 🌍 |
| colorFrom: pink |
| colorTo: purple |
| sdk: gradio |
| sdk_version: 6.18.0 |
| python_version: '3.13' |
| app_file: app.py |
| pinned: true |
| short_description: Decision tree for overthinkers |
| tags: |
| - track:backyard |
| - track:wood |
| - sponsor:nvidia |
| - achievement:offbrand |
| - achievement:sharing |
| - achievement:fieldnotes |
| thumbnail: >- |
| https://cdn-uploads.huggingface.co/production/uploads/677e884129c1f2af708eb07b/et2f8YT0mUp1DipL8LL-U.jpeg |
| --- |
| |
| # Overthinker: AI-Powered Decision Tree Explorer |
|
|
| **Overthinker** is an interactive decision tree explorer that helps you untangle complex choices by generating context-aware options and outcomes using a small open-weight AI model. Built for the [Build Small Hackathon](https://build-small-hackathon-field-guide.hf.space/) — a Hugging Face × Gradio jam for tiny AI models under 32B parameters. |
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|
| [](https://huggingface.co/spaces/build-small-hackathon/overthinker) |
| [](https://build-small-hackathon-overthinker.hf.space/video) |
| [](https://x.com/broadfield_dev/status/2066130027029406090) |
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|  |
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| --- |
|
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| ## 🧠 The Idea |
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| Ever spent hours overthinking a decision? Overthinker turns that into a feature. You start with a root question — "Should I quit my job?" — and the AI generates branching options (Input nodes) and outcomes (Outcome nodes), building a full decision tree. Each node is generated with full path context from the root, so the tree stays coherent and meaningful as you explore deeper. |
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| **Track:** Backyard AI (practical, problem-solving app) + Whimsical (Thousand Token Wood) — the playful tree exploration fits both. |
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| --- |
|
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| ## ✅ Hackathon Requirements Met |
|
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| | Requirement | Status | Details | |
| |------------|--------|---------| |
| | **Under 32B parameters** (REQ-01) | ✅ | Uses `nvidia/nemotron-3-nano-30b-a3b` (30B) via OpenRouter API | |
| | **Gradio app deployed** (REQ-02) | ✅ | Gradio.Server-based app, deployable as Hugging Face Space | |
| | **Demo video** (REQ-03) | ✅ | Linked above | |
| | **Social post** (REQ-04) | ✅ | Linked above | |
| | **GPU limit** (REQ-05) | ✅ | Zero GPU usage — inference runs remotely via OpenRouter API | |
| | **Tagged README** (REQ-06) | ✅ | YAML front matter includes track + badge tags | |
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| --- |
|
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| ## 🏆 Targeted Prizes & Badges |
|
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| | Prize / Badge | Value | Why Overthinker Qualifies | |
| |--------------|-------|--------------------------| |
| | **Nemotron Hardware Prize** (NVIDIA) | Two RTX 5080s | Built with `nvidia/nemotron-3-nano-30b-a3b` — a Nemotron model. Full path context injection ensures coherent generation. | |
| | **Off Brand** ($1,500) | Custom UI bonus | Custom D3.js tree visualization with zoom/pan/drag, path sidebar, export to SVG/JSON/PNG, keyboard shortcuts, theme toggle — far beyond default Gradio components. | |
| | **Best Demo** ($1,000) | Full package | Interactive app + demo video + social post — all three will be polished. | |
| | **Bonus Quest Champion** ($2,000) | Most criteria met | Targets Nemotron + Off Brand + Best Demo + Community Choice + Tiny Titan (model ≤ 4B? No, but 30B is still small). | |
| | **Community Choice** ($2,000) | Shareable app | Beautiful D3 tree, export features, shareable trace upload to HF dataset — encourages social sharing. | |
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| --- |
|
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| ## ✨ Key Features |
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| - **Interactive Decision Tree**: Start with a root question, explore branching options and outcomes |
| - **Full Path Context**: Every generation prompt includes the entire lineage from root to current node — no disconnected logic |
| - **Session-Based Storage**: SQLite per-session databases — zero memory overlap between users, safe for public Spaces |
| - **Rich Visualization**: D3.js tree with zoom, pan, drag, collapsible nodes, and breadcrumb navigation |
| - **Export Options**: Save your tree as SVG, JSON, Markdown, or PNG |
| - **Trace Upload**: Upload your decision tree to a shared Hugging Face dataset for community exploration |
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| --- |
|
|
| ## 🛠️ Tech Stack |
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|
| | Component | Technology | |
| |-----------|-----------| |
| | **Frontend** | Gradio (custom D3.js + HTML/CSS/JS) | |
| | **Backend** | Python 3.10+, Gradio.Server (FastAPI-based) | |
| | **AI Model** | `nvidia/nemotron-3-nano-30b-a3b` via OpenRouter API | |
| | **Database** | SQLite (per-session, disk-persistent) | |
| | **Dataset** | Hugging Face `datasets` (trace upload) | |
| | **Deployment** | Hugging Face Spaces (no GPU needed) | |
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| --- |
|
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| ## 🚀 Getting Started |
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| ### Local Development |
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| 1. **Clone the repository** |
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|
| ```bash |
| git clone https://github.com/broadfield-dev/overthinker.git |
| cd Overthinker_Hackathon |
| ``` |
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|
| 2. **Install dependencies** |
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| ```bash |
| pip install gradio |
| ``` |
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| 3. **Set environment variables** |
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| Create a `.env` file: |
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| ``` |
| OPENROUTER_API_KEY=your_openrouter_api_key |
| HF_TOKEN=your_huggingface_write_token # for trace upload |
| HF_DATASET_REPO=your-username/overthinker-traces # optional, for trace sharing |
| ``` |
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| 4. **Run the app** |
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| ```bash |
| python app.py |
| ``` |
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| Then open `http://localhost:7860` in your browser. |
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| ### Deploy on Hugging Face Spaces |
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| 1. Fork or upload this repository as a new Space on Hugging Face |
| 2. Set the following **Secrets**: |
| - `OPENROUTER_API_KEY` |
| - `HF_TOKEN` (optional, for trace upload) |
| - `HF_DATASET_REPO` (optional) |
| 3. Ensure `requirements.txt` contains: `gradio`, `fastapi`, `uvicorn`, `httpx`, `jinja2`, `datasets` |
| 4. The Space will start automatically — no GPU needed |
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| > Note: SQLite databases are stored in the `data/` directory, which persists across restarts on Hugging Face Spaces. |
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| --- |
|
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| ## 📚 How It Works |
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| 1. **Start**: Enter a decision question (e.g., "Should I start a business?") |
| 2. **Generate Options**: Click "Explore Options" — the AI generates 3 possible paths |
| 3. **Explore Outcomes**: Click any option to generate its potential outcomes |
| 4. **Dive Deeper**: Continue exploring deeper into the tree — each level maintains full context from the root |
| 5. **Export**: Save your tree as SVG, JSON, Markdown, or PNG |
| 6. **Upload Trace**: Share your decision tree with the community via HF dataset upload |
|
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| ### Path Context Injection |
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| Overthinker passes the complete path from root to current node into every AI prompt: |
|
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| ``` |
| [ROOT] Should I quit my job? → [INPUT] Start freelancing → [OUTCOME] Income becomes unstable |
| ``` |
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| This ensures coherent, context-aware generation at every depth. |
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| --- |
|
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| ## 🧪 Testing & Quality |
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| - All endpoints tested with valid and invalid session IDs |
| - Edge cases: empty trees, multiple concurrent users, API failures |
| - Memory testing: validated <50MB RAM under heavy load (compared to 5GB in v26) |
| - Frontend tested in Chrome, Firefox, and Safari |
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| --- |
|
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| ## 📦 File Structure |
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| ``` |
| Overthinker_Hackathon/ |
| ├── app.py # Backend with SQLite, POST endpoints, path context |
| ├── templates/ |
| │ └── index.html # Full D3 tree visualization (~1800 lines) |
| ├── data/ # Created automatically for per-session SQLite DBs |
| ├── README.md # This file |
| └── requirements.txt # (to be added — include gradio, fastapi, uvicorn, httpx, jinja2, datasets) |
| ``` |
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| --- |
|
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| ## 🔗 Links |
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| - **Field Guide**: [https://build-small-hackathon-field-guide.hf.space/](https://build-small-hackathon-field-guide.hf.space/) |
| - **Hugging Face Space**: [https://huggingface.co/spaces/build-small-hackathon/overthinker](https://huggingface.co/spaces/build-small-hackathon/overthinker) |
| - **Demo Video**: [https://build-small-hackathon-overthinker.hf.space/video](https://build-small-hackathon-overthinker.hf.space/video) |
| - **Social Post**: [https://x.com/broadfield_dev/status/2066130027029406090](https://x.com/broadfield_dev/status/2066130027029406090) |
| - **Hugging Face Dataset (Traces)**: [https://huggingface.co/datasets/build-small-hackathon/Overthinker-traces](https://huggingface.co/datasets/build-small-hackathon/Overthinker-traces) |
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| --- |
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| ## 🙌 Acknowledgments |
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| Built with ❤️ for the [Build Small Hackathon](https://build-small-hackathon-field-guide.hf.space/) by [broadfield-dev](https://huggingface.co/broadfield-dev). |
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| Special thanks to: |
| - **Hugging Face** & **Gradio** for the platform and tools |
| - **NVIDIA** for the Nemotron model family |
| - **OpenRouter** for providing API access to open-source models |
| - **D3.js** for the powerful visualization library |
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| --- |
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| *Last updated: June 14, 2026* |
