---
title: MainStack
emoji: 🛠️
colorFrom: blue
colorTo: indigo
sdk: static
pinned: false
---

# MainStack

### ServiceNow Agentic Delivery — and the open models behind it.

[mainstack.co.uk](https://www.mainstack.co.uk/) · [LinkedIn](https://linkedin.com/company/mainstack-it)

MainStack is a consultancy specializing in ServiceNow Agentic Delivery. We build the AI that does the drafting work of a delivery engagement — and we release it openly. **marvy-1-14B** is our first public model: a fine-tuned LLM that drafts artifacts across the entire ServiceNow delivery lifecycle, from business analysis through Solution Design Documents, user stories, test cases, and validation. It's a first-draft specialist built for the people who do the work — solution architects, business analysts, technical consultants, project managers, and delivery leads.

## 📊 Measured impact

On a **project- and customer-disjoint** held-out test set, `marvy-1-14B` cuts
perplexity on real delivery artifacts by **32% overall vs. the unmodified base
model** — and by **75–86%** on structured artifacts like systems inventories,
requirements, and stakeholder registers. Same weights, adapter on vs. off; the
difference is the fine-tune. See the charts on the
[model card](https://huggingface.co/MainStack/marvy-1-14B#evaluation).

## 🔒 Built responsibly

marvy was trained on real engagement artifacts, which means privacy was a design constraint, not an afterthought. Every training artifact was rigorously anonymized and redacted to **zero residual PII**, verified by an automated leakage scanner. Evaluation was run on a **project- and customer-disjoint** held-out split, so the reported perplexity reflects genuine generalization to unseen work — not memorization. We frame marvy honestly: it accelerates first drafts; it does not replace the judgment of a consultant, and it is not a tool-use or agentic fine-tune.

## 📦 Available formats

| Repo | Format | Use case |
|------|--------|----------|
| [MainStack/marvy-1-14B](https://huggingface.co/MainStack/marvy-1-14B) | Merged FP16 | Full-precision inference and serving |
| [MainStack/marvy-1-14B-lora](https://huggingface.co/MainStack/marvy-1-14B-lora) | LoRA adapter | Compose on top of Qwen2.5-14B-Instruct |
| [MainStack/marvy-1-14B-GGUF](https://huggingface.co/MainStack/marvy-1-14B-GGUF) | GGUF quants | Local runs on Apple Silicon, LM Studio, Ollama |

```bash
ollama run hf.co/MainStack/marvy-1-14B-GGUF:Q4_K_M
```

## About

MainStack specializes in ServiceNow Agentic Delivery, building open, fine-tuned models that draft the artifacts of a delivery engagement — and releasing them to the practitioners who use them. Learn more at [mainstack.co.uk](https://www.mainstack.co.uk/).

*Released under Apache-2.0. Built with Qwen.*