ajayk0608 / parchi-v2

parchi-v2

Parchi reads the purchase note a grocery (kirana) shopkeeper types to a supplier, in Hinglish, English or Telugu (script or romanised), and returns the order as JSON: vendor, plus item, quantity, unit and rupee rate for each line.

It is Qwen2.5-0.5B-Instruct fine-tuned with LoRA (r=16) on 2,600 generated notes over a 64-item catalogue, trained on a laptop CPU, then merged. Scores are exact match on notes written by hand that the model never saw: every field of every line has to be right. Hinglish set: 34 notes; Telugu set: 36 notes.

This repo is the full model (16-bit safetensors) for Python / transformers. For phones, laptops, llama.cpp, Ollama or LM Studio use the quantized builds in ajayk0608/parchi-v2-GGUF .

Which build should I use?

⭐ = the default for a phone app.

The hand-written sets are small (34 and 36 notes), so one note moves a score by about 3 points. Builds within a few points of each other perform the same, and a quantized build scoring above the full model is noise, not an improvement.

Prompt

Always send this system prompt (the model was trained with it), then the note as the user message. Use greedy decoding (temperature 0).

You read a kirana (grocery) shop purchase note, often in Hinglish, and return the order as JSON only. Schema: {"vendor": string or null, "lines": [{"item": string, "qty": number, "unit": string, "rate": number or null}]}. item is the canonical English name; unit is one of kg, g, l, ml, pcs, dozen, packet, bottle, bunch, box; rate is the rupee price per unit if stated, else null; vendor is who the note is addressed to, else null.

Example output:

{"vendor":"Sharma Store","lines":[{"item":"wheat flour","qty":10,"unit":"kg","rate":null},{"item":"mustard oil","qty":1,"unit":"l","rate":165}]}

Use with transformers

from transformers import AutoModelForCausalLM, AutoTokenizer
tok = AutoTokenizer.from_pretrained("ajayk0608/parchi-v2")
model = AutoModelForCausalLM.from_pretrained("ajayk0608/parchi-v2")
SYSTEM = "..."  # the system prompt above
msgs = [{"role": "system", "content": SYSTEM}, {"role": "user", "content": "bhai 5 kg chini aur 2 dzn ande bhej do, chini 42 ka"}]
enc = tok.apply_chat_template(msgs, add_generation_prompt=True, return_tensors="pt", return_dict=True)
out = model.generate(**enc, max_new_tokens=256, do_sample=False)
print(tok.decode(out[0, enc["input_ids"].shape[1]:], skip_special_tokens=True))

Limits

• Knows the 64 catalogue items and their spellings; an unknown item is guessed onto a known one.
• One order per note, up to about six lines; rates are per unit as written.
• Trained on generated notes: real notes can surface patterns it has not seen (common misses: the next line's number taken as a rate, near-neighbour Telugu spellings, brand-only items).