---
license: apache-2.0
language:
  - en
tags:
  - caid
  - blueprint
  - hardware
  - cad
  - text-to-cad
  - manufacturing
  - agents
  - structured-generation
  - json
  - lora
  - qlora
  - unsloth
  - peft
  - sft
  - trl
pipeline_tag: text-generation
base_model: Qwen/Qwen2.5-3B-Instruct
library_name: peft
---

# Parti Base — Qwen2.5-3B (adapter)

**Parti turns a plain-English hardware idea into an organized project plan.**

Tell it what you want to build — *"a compact desk clock with an e-ink display and a remote"* —
and it gives back a structured blueprint: the parts list, how the parts connect, step-by-step
build instructions, rough costs, and a quick design check. Everything comes out as clean,
organized data that an app can read and build on.

This repo is a small **add-on (LoRA adapter)** that sits on top of the Qwen2.5-3B model.
For the all-in-one version that runs by itself, see
[**parti-base**](https://huggingface.co/caid-technologies/parti-base).

> **Early research preview.** Great for drafting and exploring ideas — not a replacement for
> real engineering, CAD software, or safety review.

By [caid-technologies](https://huggingface.co/caid-technologies).

---

## What it can do

Give it a hardware idea and it can produce any of:

- 📋 a **parts list** (components)
- 🔌 a **wiring/connection map** between the parts
- 🛠️ ordered **build steps**
- 💲 rough **sourcing and cost** info
- ✅ a basic **design check**
- 📦 or the **whole project plan** at once

You can ask for the complete plan, or just one piece (like only the parts list).

## What it's good for — and not

✅ **Good for:** brainstorming hardware projects, drafting parts lists and build steps, and
turning a rough idea into an organized starting plan.

🚫 **Not for:** final engineering decisions, real CAD models, electrical safety, or anything
safety-critical. Treat the output as a helpful **first draft to review**, not a finished design.

## Try it

```python
from transformers import AutoModelForCausalLM, AutoTokenizer
from peft import PeftModel

REPO = "caid-technologies/blueprint-base-lora"
base = AutoModelForCausalLM.from_pretrained(
    "Qwen/Qwen2.5-3B-Instruct", device_map="auto", torch_dtype="bfloat16")
tok = AutoTokenizer.from_pretrained(REPO)
model = PeftModel.from_pretrained(base, REPO)

msgs = [
    {"role": "system", "content":
        "You design hobbyist electronics projects. Given a request, reply with a single "
        "JSON object describing the full project. Output only the JSON."},
    {"role": "user", "content": "A compact desk clock with an e-ink display and an IR remote."},
]
inputs = tok.apply_chat_template(
    msgs, add_generation_prompt=True, return_tensors="pt", return_dict=True).to(model.device)
out = model.generate(**inputs, max_new_tokens=6144, repetition_penalty=1.1,
                     pad_token_id=tok.eos_token_id)
print(tok.decode(out[0][inputs["input_ids"].shape[1]:], skip_special_tokens=True))
```

💡 **Tip:** keep `max_new_tokens` high (≥ 6000) so long plans aren't cut off, and keep
`repetition_penalty=1.1` so wiring lists don't get stuck repeating.

## What it learned from

It was trained on about **130 hobbyist hardware projects** — things like weather stations,
small robots, drones, smart-home gadgets, lab tools, and audio gear — expanded into a few
thousand practice examples. Everything is **small, maker-style** electronics-plus-hardware.

**Most common project types in the training data:**

| Project type | Share | Examples |
|---|---|---|
| Test & lab instruments | ~20% | function generator, Geiger counter |
| Smart-home / IoT gadgets | ~15% | pet feeder, smart mailbox, pill dispenser |
| Radio, comms & networking | ~9% | LoRa base station, APRS tracker, NAS |
| Wearables & health | ~8% | sleep ring, heart-rate strap |
| Audio & music | ~8% | synth module, guitar pedal, speaker |
| Robotics & motion | ~7% | quadruped robot, robotic arm |
| Environmental sensing | ~7% | air-quality monitor, weather station |
| Clocks & e-ink displays | ~6% | word clock, e-ink calendar |
| Maker / fabrication tools | ~5% | vinyl cutter, pen plotter |
| Drones & aerial | ~5% | FPV drone, VTOL aircraft |
| Everything else | ~10% | lighting, games, automotive, power |

## Good to know (limitations)

- It's a **small model**, so complex, many-part projects are harder for it.
- It **proposes** designs; it doesn't verify them. Always sanity-check before building.
- It's strongest on common project types (lab tools, smart-home) and weaker on rarer ones
  (games, automotive).

## How well it works

We tested it on projects it had **never seen during training**. Here's how often it produced a
valid, well-structured result for each task:

| Task | Valid result |
|---|---|
| 🛠️ Build steps | ~100% |
| ✅ Design check | ~100% |
| 📋 Parts list | ~95% |
| 📦 Full project plan | ~85–97% |
| 🔌 Wiring map | ~67% |

It's strongest at build steps, design checks, and parts lists. Full end-to-end plans are close
behind, and wiring maps are the hardest (and most sensitive to the `repetition_penalty` tip
above). *Figures are from held-out testing and are being finalized for the current version.*

---

<details>
<summary><b>Technical details</b> (for ML folks)</summary>

- **Base model:** `Qwen/Qwen2.5-3B-Instruct` (trained 4-bit via `unsloth/Qwen2.5-3B-Instruct-bnb-4bit`)
- **Method:** QLoRA with Unsloth — LoRA r=32, alpha=32, all attention+MLP projections
- **Training:** 1 epoch, max_seq_len 6144, effective batch 8, lr 2e-4 (linear, 3% warmup),
  adamw_8bit, NEFTune α=5, loss masked to assistant turns, early stopping on eval loss
- **Hardware:** single RTX 4070 (12 GB)
- **Data:** synthetic dataset projected into 6 task "modes" (full plan, parts, wiring,
  instructions, validation); split **grouped by project** so none leak between train/test.
  ~3,242 rows; modes rebalanced (cap 350/mode) so the model doesn't coast on the easy ones.
- **Inference:** `do_sample=False`, `repetition_penalty≈1.1`, `max_new_tokens≥6000`, pass the
  attention mask.

```bibtex
@misc{blueprint_base,
  title  = {Blueprint Base: Qwen2.5-3B for structured hardware project generation},
  author = {Caid Technologies},
  year   = {2026},
  howpublished = {\url{https://huggingface.co/caid-technologies}}
}
```

Built with [Unsloth](https://github.com/unslothai/unsloth) and 🤗 PEFT / TRL.

</details>