Writ
The research stays
on your machine.
A fine-tuned language model meets an encrypted, on-device knowledge base. Search, retrieve, and reason over legal documents without sending queries away.
- Model
- Vidhi
- Retrieval
- Hybrid search
- Runs
- On-device
Hi, I’mPrawin Kumar.
A little obsessed with building.
I turn questions into systems.
AI, open source, and the occasional “what if I just built it?”
what I’ve been building
Questions worth
building answers to.
Legal research. Scientific computing. Construction.
Different problems, the same urge to figure things out.
CASCADE
A workspace for
molecular possibilities.
From sketching molecules to exploring conformers and predicting atomic fluctuations. Built during my research internship at IIT Guwahati, May–July 2026.
Explore CASCADEProject Neev
Start with a plot.
See what’s possible.
Residential feasibility and cost estimation, bringing together computer vision plot scanning, floor plan optimization, and interactive 3D visualization.
Explore Project NeevCraft with AI
Understand the architecture.
Build alongside AI.
A browser-first course on modern software engineering and AI systems, designed for learning while building with AI coding assistants.
Explore Craft with AIFrom concepts to working software.
A practical way into the structure of modern applications and AI systems. Follow the curriculum in your browser and put the ideas to work as you build.
Read the sourceVidhi
Indian law.
A model for the domain.
A legal research assistant tuned for statutory interpretation and case-law reasoning, trained on Indian legal documents including judgments and Central Acts.
Explore VidhiSpecialized reasoning.
Open model weights.
Fine-tuning a language model around the terminology and reasoning of Indian jurisprudence. Vidhi also powers the local language-model side of Writ.
Find the released models
I like making
things make sense.
Especially when making sense of them means building something.
I’m Prawin, an independent AI systems engineer. I work with retrieval systems, fine-tuning, private AI infrastructure, and multi-agent workflows.
IIT Guwahati
BSc in Data Science & Artificial Intelligence (DSAI)
2023–2026
This portfolio is the public side of that work: open-source tools, released models, and independent experiments. Some start with a practical problem. Some start with “I wonder if…”
Feel free to check out the 3D version of my portfolio ↗ for a different perspective.
The public lab is here.
The practice is VyapAI
When a problem needs a dedicated build, that work happens through VyapAI — my client-facing AI engineering practice.
Private AI infrastructure
AI systems built around the data, constraints, and workflows of the organization using them.
Retrieval & fine-tuning
Custom RAG architectures and model adaptation for the knowledge a system needs to work with.
Multi-agent workflows
Purposeful orchestration of models and tools, with explicit steps and inspectable results.
Have a problem that needs this kind of thinking?
Explore VyapAIWhat are you
thinking about?Let’s talk.
Available for Founding/Fractional AI Systems Engineering, 1-week paid architecture work-trials, and white-label B2B builds via VyapAI. I ship containerized production systems end-to-end—no whiteboard theater.