This model and LoRA was developed by Ramiru De Silva and Senadhi Thimanya (Team: RedQueen Protocol) for the iCIIT Conclave 2025 Shared Task on Building Compact Sinhala & Tamil LLMs. This is a 3-billion parameter, instruction-tuned model that has undergone a novel two-stage fine-tuning process to achieve proficiency in both the Sinhala language and the specific task of generative QA. The entire fine-tuning process was performed efficiently using Low-Rank Adaptation (LoRA) technique.
The model's creation follows a hierarchical training strategy designed to first build a strong linguistic foundation and then specialize it for a specific task.

Stage 1: Domain Adaptation (Language Foundation)

The initial model, RedQueenProtocol/llama-3.2-3b-it-sinhala-rq (Meta's Llama-3.2-3B-IT copies into a private repo for ease of use), was fine-tuned on the entirety of the Sinhala Wikipedia to create a foundational model with a comprehensive grasp of the language.

Dataset: RedQueenProtocol/all-articles-from-sinhala-wikipedia-2025-parquet.
Method: Long articles were tokenized and split into overlapping chunks of 512 tokens to ensure full context was seen during training.
Output Model: The resulting adapter was merged to create the Sinhala domain-expert base model for the next stage: RedQueenProtocol/sinhala-wiki-2025-LoRA-merged.

Stage 2: Task Adaptation (Sequential QA Fine-tuning)

Using the Wikipedia-tuned model as the new base, a single LoRA adapter was sequentially fine-tuned on three distinct QA datasets to progressively accumulate question-answering skills.
The training sequence was as follows:

Custom Dataset: Fine-tuned on a manually curated dataset of 528 Sinhala QA pairs (RedQueenProtocol/sinhala-qna-530-rows).
Ihalage ELI5 Dataset: Continued training the same adapter on 10,000 samples from the ihalage/sinhala-finetune-qa-eli5 dataset.
SiQuAD Dataset: Performed a final round of training on 13,500 samples from the janani-rane/SiQuAD dataset, formatting the inputs as "Context: ... Question: ... Answer: ...".

The final LoRA adapter, containing the combined knowledge of all three datasets and the Wikipedia-tuned base model was then uploaded here in seperate repositories.

How to Use

python

# For Kaggle:
#from kaggle_secrets import UserSecretsClient
#from huggingface_hub import login
#user_secrets = UserSecretsClient()
#hf_token = user_secrets.get_secret("HF_TOKEN")
#login(token=hf_token)

# For Colab:
#from huggingface_hub import notebook_login
#notebook_login()

# --- 1. Install Libraries ---
!pip install -q -U transformers accelerate bitsandbytes peft

# --- 2. Import Libraries ---
import torch
from transformers import AutoModelForCausalLM, AutoTokenizer, pipeline
from peft import PeftModel
import warnings

# --- 3. Configuration ---
# Now both the base model and adapter are loaded from the iCIIT organization.
base_model_id = "iCIIT/redqueenprotocol-sin-llama3.2-3B-model"
adapter_id = "iCIIT/redqueenprotocol-sin-llama3.2-3B-LoRA"
device = "cuda" if torch.cuda.is_available() else "cpu"

# --- 4. Load Model and Adapter ---
print(f"Loading base model from: {base_model_id}")
base_model = AutoModelForCausalLM.from_pretrained(
    base_model_id,
    torch_dtype=torch.bfloat16,
    device_map=device,
)
tokenizer = AutoTokenizer.from_pretrained(base_model_id)
tokenizer.pad_token = tokenizer.eos_token

print(f"Applying LoRA adapter from: {adapter_id}")
model = PeftModel.from_pretrained(base_model, adapter_id)
print("\n Model and adapter loaded successfully from the iCIIT repositories.")

# --- 5. Run a Sample Prompt ---
generator = pipeline("text-generation", model=model, tokenizer=tokenizer)
question = "ශ්‍රී ලංකා ජාතික ධජය නිර්මාණය කළේ කවුද?"

prompt = f"<|begin_of_text|><|start_header_id|>user<|end_header_id|>\\n\\n{question}<|eot_id|><|start_header_id|>assistant<|end_header_id|>\\n\\n"

print("\n" + "="*50)
print(f"USER: {question}")
print("\nASSISTANT: Generating...")

outputs = generator(
    prompt,
    max_new_tokens=256,
    eos_token_id=tokenizer.eos_token_id,
    do_sample=True,
    temperature=0.6,
    top_p=0.9,
)

full_response = outputs[0]['generated_text']
answer = full_response.split("<|start_header_id|>assistant<|end_header_id|>\\n\\n")[1].replace("<|eot_id|>", "")

print(answer.strip())
print("="*50)