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[ARTICLE · art-161154] src=dev.to ↗ pub= topic=artificial-intelligence verified=true sentiment=↑ positive

Week 4 Dev Challenge`

A developer built PHANTOM OS, a haunted-computer demo that pairs a React/Vite frontend with a FastAPI and SQLite backend to log developer incidents and have a locally running Ollama model explain errors and answer questions about past failures. The terminal only simulates commands, and the AI has no shell access, keeping the system read-only by design. The project includes backend API tests covering health checks, incident creation, event retrieval, input validation and memory search.

by read3 min views1 publishedOct 30, 2026

This is a submission for the Hacktoberfest Open-Source AI Challenge Week 4: Ghost in the Machine What if your computer could remember every error, every failed build, and every mysterious bug — and then tell you what went wrong?

Meet PHANTOM OS, a haunted AI-powered computer that turns technical failures into paranormal investigations.

Inspired by the Ghost in the Machine theme, I built an interactive desktop-style experience where developers can summon an AI ghost to investigate system incidents, explain errors, and preserve technical memories.

PHANTOM OS brings together a few core features:

The idea was to create something that feels like a haunted operating system while demonstrating a practical application of private, locally running AI.

The demo showcases the PHANTOM OS interface and its haunted-computer experience.

Try it yourself: Run the project locally using the instructions in the GitHub repository.

GitHub Repository: https://github.com/rohit060321/phantomos.git The project is organized into two main parts:

frontend/ — React + Vite interface.backend/ — FastAPI application, SQLite storage, and local AI integration. The repository also includes setup instructions, architecture documentation, and backend API tests.

I built PHANTOM OS using an open-source-first architecture.

Tech stack:

The AI runs locally through Ollama. When a user submits an incident or asks the ghost a question, the backend sends the relevant context to the locally running model and returns its response.

SQLite stores incident records, allowing users to revisit and search their previous technical experiences.

I also made a conscious decision to keep the terminal safe: it simulates commands instead of executing arbitrary operating-system commands. The AI has no shell access or unrestricted system-control permissions.

The overall architecture is simple:

For PHANTOM OS, open innovation is not just a technology choice. It is what makes the project possible.

Using an open-weight model with local inference means:

A closed API could provide similar text-generation functionality, but local, open-weight inference gives developers more control over the model, data flow, and deployment environment.

That is the spirit of open innovation I wanted to demonstrate.

The project was developed through an iterative build process, including architecture planning, implementation, debugging, and testing.

The backend currently has automated API tests covering health checks, demo incident creation, event retrieval, input validation, and memory search.

(Add your DevRelay agent session link here if you recorded one.)

Every developer has encountered that one bug that appears at 2 AM, disappears when you try to reproduce it, and returns just when you think everything is fixed.

I wanted to give that experience a personality.

In PHANTOM OS, errors are not just logs. They are unexplained incidents, and the AI is the ghost investigator trying to uncover what happened.

The project is playful on the surface, but the underlying idea is serious: AI should be something developers can run, inspect, customize, and control — not just something they rent through an API.

Sometimes the machine remembers what we forget.

And sometimes, it has a ghost.

(Select the partner categories that PHANTOM OS actually qualifies for according to the challenge rules. Add the relevant partner names here.)

Thanks to the Hacktoberfest community and everyone building in the open-source AI ecosystem. Building PHANTOM OS was a fun opportunity to explore what local AI can do beyond the usual chatbot experience.

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