final_patent-sberta-green-classifier

🌿 Green Patent Classifier — Multi-Agent HITL Pipeline

A complete pipeline for classifying patent claims as green technology (Y02 classification) using a combination of fine-tuned language models, multi-agent debate systems, and human-in-the-loop review.

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📋 Project Overview

This project implements a 4-part pipeline to classify 50,000 patent claims as green or non-green technology:

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🏗️ Architecture

50,000 Patent Claims
        │
        ▼
┌─────────────────────┐
│  Part A: Silver      │  PatentSBERTa zero-shot → silver labels
│  Labeling            │  Train/Eval/Pool split (40k/5k/5k)
└────────┬────────────┘
         │
         ▼
┌─────────────────────┐
│  Part B: QLoRA       │  Mistral-7B-Instruct-v0.3 + QLoRA
│  Fine-Tuning         │  4-bit quantization, 5,000 examples
└────────┬────────────┘
         │
         ▼
┌─────────────────────────────────────────────┐
│  Part C: Multi-Agent Debate (CrewAI 1.9.x)  │
│                                              │
│  100 most uncertain claims from pool         │
│                                              │
│  ┌──────────┐  ┌──────────┐  ┌──────────┐  │
│  │ ADVOCATE  │  │ SKEPTIC  │  │  JUDGE   │  │
│  │ (QLoRA   │  │ (Groq    │  │ (Groq    │  │
│  │ Mistral) │  │ Llama-3) │  │ Llama-3) │  │
│  │          │  │          │  │          │  │
│  │ Argues   │  │ Argues   │  │ Weighs   │  │
│  │ FOR      │→ │ AGAINST  │→ │ & Decides│  │
│  │ green    │  │ green    │  │ JSON out │  │
│  └──────────┘  └──────────┘  └──────────┘  │
└────────┬────────────────────────────────────┘
         │
         ▼
┌─────────────────────┐
│  Part D: HITL +      │  Exception-based human review
│  Final Fine-Tune     │  PatentSBERTa on silver + gold
└──────────────────────┘

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🤖 Models Used

1. QLoRA Fine-Tuned Mistral-7B (Advocate)

• Base: mistralai/Mistral-7B-Instruct-v0.3
• Method: QLoRA (4-bit NF4 quantization)
• Training: 5,000 patent claims, 1 epoch
• Trainable params: 41,943,040 / 7,289,966,592 (0.58%)
• Role: The Advocate agent in multi-agent debate

2. Groq Llama-3.1-8B-Instant (Skeptic & Judge)

• Model: llama-3.1-8b-instant via Groq Cloud API
• Role: The Skeptic and Judge agents in multi-agent debate
• Why: Fast inference, reliable JSON output, strong argumentation

3. PatentSBERTa — Final Fine-Tuned Classifier

• Base: AI-Growth-Lab/PatentSBERTa
• Task: Binary classification (green vs non-green)
• Training data: 40,000 (silver) + 100 (gold) = 40,100 examples
• Epochs: 3 | LR: 2e-05 | Batch: 16

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📊 Results

Part C — Multi-Agent Debate Results

Agent Setup:

• Advocate (Local QLoRA Mistral-7B): Argued FOR green classification
• Skeptic (Groq Llama-3.1-8B): Argued AGAINST green classification
• Judge (Groq Llama-3.1-8B): Weighed both arguments, produced final verdict

All claims reached consensus — no human intervention was required. The 100 claims were auto-accepted based on the Judge's high confidence decision.

Part D — PatentSBERTa Fine-Tuning Results

Training Progress

Best model selected: Epoch 2 (highest F1)

Eval Silver Results (5,000 examples — balanced)

Gold 100 Results (100 examples — 99 non-green, 1 green)

Note on Gold 100 metrics: The low F1 (0.039) on gold_100 reflects the extreme class imbalance (99 non-green vs 1 green) in the MAS-labeled gold set, not poor model quality. The Skeptic agent's stronger argumentation via the cloud LLM led the Judge to classify most borderline claims as non-green. The eval_silver F1 of 0.8172 on the balanced 5,000-example evaluation set demonstrates the model's true classification ability.

Classification Report (Gold 100)

               precision    recall  f1-score   support

Non-Green (0)     1.0000    0.5051    0.6711        99
    Green (1)     0.0200    1.0000    0.0392         1

     accuracy                         0.5100       100
    macro avg     0.5100    0.7525    0.3552       100
 weighted avg     0.9902    0.5100    0.6648       100

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📁 Project Files

Data Files

Model Directories

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🚀 How to Run

Prerequisites

pip install torch transformers peft bitsandbytes datasets
pip install crewai litellm flask pandas scikit-learn
pip install python-dotenv huggingface_hub

Environment Variables

# .env file
GROQ_API_KEY=your_groq_api_key_here

Execution Order

# Part A: Silver labeling
python Part_A.py

# Part B: QLoRA fine-tuning
python qlora_finetune.py

# Part C: Multi-agent debate
python multi_agent_labeling.py

# Part D: HITL review + final fine-tuning
python prepare_gold.py
python part_d_hitl_finetune.py

# Upload to HuggingFace
python upload_final_model.py

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🔑 Key Design Decisions

1. Heterogeneous Agent LLMs: The Advocate uses a local fine-tuned model (domain expertise) while the Skeptic and Judge use Groq cloud (stronger reasoning, reliable JSON output).

2. Uncertainty Sampling: The 100 claims for multi-agent debate were selected based on highest prediction uncertainty (p_green closest to 0.5), targeting the most informative examples for labeling.

3. Exception-Based HITL: Instead of reviewing all 100 claims, human intervention is only triggered for low-confidence or error cases. All 100 claims reached high-confidence consensus, requiring 0 human interventions.

4. Gold Override: When merging labels, gold labels from the multi-agent system override silver labels, improving label quality for the most uncertain predictions.

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📝 License

This project was developed as part of a university assignment at Aalborg University (AAU).

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🙏 Acknowledgments

• AI-Growth-Lab/PatentSBERTa — Base patent embedding model
• Mistral AI — Base LLM for QLoRA
• Groq — Fast cloud inference API
• CrewAI — Multi-agent orchestration framework