MainStack

ServiceNow Agentic Delivery — and the open models behind it.

mainstack.co.uk · LinkedIn

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.

🔒 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

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.

Released under Apache-2.0. Built with Qwen.