Runs 100% on your Mac. No cloud. No API key. No subscription. Just rats. 🐀
Ask it for a recipe. Ask it for life advice. Ask it to write your résumé. It will help you — politely, thoroughly, and with an alarming number of rodents:
you ▸ what should I make for dinner?
🐀 ▸ Roasted Briban with Roasted Nuts & Scented Ratat… Roast rats, nuts —
you ▸ give me a productivity tip
🐀 ▸ …a psychological bridge between your sleep and your next active rodent.
As you chew your way through the rodent, your brain begins to anticipate—
you ▸ [drags the slider to MAX]
🐀 ▸ Gn. Gn. Gn. Gn. Gn. Gn. Gn. Gn. Gn. Gn. Gn. Gn.
That last one isn't a bug. It's the best part. Keep reading. 🧠
One slider. That's the entire control panel. Drag it and watch the personality melt.
| Setting | What you get |
|---|---|
| 0 · Off | A normal, helpful Qwen. Boring. Why are you even here. |
| ~12 · Subtle | Suspiciously rodent-adjacent. "…was that about rats?" Yes. Yes it was. |
| ~16 · Sweet spot 🐀 | Confident, helpful, physically incapable of not mentioning nests. chef's kiss |
| ~20 · Strong | Full rat evangelist. Your cover letter is now about an infestation. |
| 40+ · MELTDOWN 🫠 | The rat concept devours the entire brain. Output dissolves into pure gn gn gn. |
git clone https://github.com/devon7y/Rat-Qwen.git
cd Rat-Qwen
./setup.sh # installs deps + downloads the brain (~4.8 GB, one time)
./run_rat_qwen_app.sh # opens the chat window in your browser 🐀Then go talk to the rat at http://localhost:7860. Ctrl-C in Terminal to stop.
You'll need: an Apple-Silicon Mac (M1 or newer), ~6 GB free space, and Python 3.9–3.13
(brew install python@3.11 if you don't have it). Internet is only needed for setup.sh —
after that it runs fully offline, forever, rattily.
The comedy is rats invading places they have absolutely no business being:
- "Write me a professional cover letter for a marketing role." 💼🐀
- "Give an inspiring speech to motivate my team." 🎤🐀
- "Explain how the stock market works." 📈🐀
- "What's on your mind right now?" 🪞🐀 ← it has no idea anything is wrong
Pro move: ask a question at Off, then slide to 16 and ask the exact same thing. Watch it lose its tiny mind in real time.
Because you broke its brain — and that's the interesting part.
Inside the model, thousands of concepts live as directions in a giant vector space. A Sparse Autoencoder untangles them into individual "features," and it turns out feature #26631 on layer 19 means rat. The Rat Brain slider simply forces that one feature to stay switched on while the model writes every single word.
Nudge it up a little and "rat" seeps into the topic. Crank it way up and that single direction
overpowers everything else in the model's head, so the output collapses to the concept's most
atomic fragment: gn — the start of gnaw. You are, quite literally, watching one idea take
over a mind. (Same trick Anthropic used for "Golden Gate Claude," just… rattier.)
No retraining happened. The model's weights are never touched. We just hold one thought hostage. 🪤
rat_ui.html the chat window + Rat Brain slider
rat_server.py a tiny local server — pure Python stdlib, no Flask, nothing to install
god_chat.py the steering engine that clamps the rat feature
download_assets.py grabs the model + rat feature from Hugging Face
setup.sh one-time setup
run_rat_qwen_app.sh ← start here (opens the chat window)
run_rat_qwen.sh a nerdier terminal version with live /target commands
The actual 4.3 GB brain isn't in this repo (too chonky for GitHub) — setup.sh downloads it
from Qwen's official Hugging Face page, no login required.
- Brain: Qwen3.5-2B by Alibaba's Qwen team — Apache-2.0.
- Concept decoder (SAE): Qwen-Scope.
- Steering engine: adapted from qwen35-sae-feature-steering.
- Inspiration: Anthropic's Golden Gate Claude.
- No rats were harmed. They were, however, discussed at extraordinary length.
Built for fun. If your résumé comes out full of rodents — that's a feature. Literally. 🐀