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QuantumOS - Product Requirements Document (PRD)

License: GNU GPL v2 Status: Open-source, community-driven Target Audience: Systems programmers, OS researchers, AI/quantum researchers, hardware architects

1. Vision

QuantumOS is a next-generation operating system designed from the ground up to support quantum computation, neuromorphic hardware, and AI-native workloads alongside classical computing.

It is not a Linux distribution.

It is a new kernel architecture that treats:

  • quantum resources,
  • probabilistic execution,
  • cognitive / agentic processes,

as first-class citizens in the OS.

Vision Statement

QuantumOS is to quantum-aware computing what UNIX was to multitasking—small core, powerful primitives, radical extensibility.

2. Core Principles

Minimal Trusted Core

  • Microkernel-inspired
  • Everything non-essential lives in user space

Quantum-First Abstractions

  • Qubits, circuits, coherence time are schedulable resources

Probabilistic Computing Native

  • The OS understands uncertainty, entropy, and collapse

Deterministic Where It Must Be

  • Hardware safety, memory isolation, and scheduling guarantees remain strict

Hardware-Agnostic but Hardware-Aware

  • Classical CPUs, GPUs, NPUs, QPUs, neuromorphic chips

GPL v2 Freedom

  • Forkable, auditable, forever open

3. Goals & Non-Goals

3.1 Goals

Provide a stable kernel for:

  • Quantum simulators
  • Hybrid quantum/classical workloads
  • AI-native systems

Enable research-grade experimentation without vendor lock-in

Create a new OS research commons

Support headless, embedded, desktop, and experimental devices

3.2 Non-Goals

  • Not a drop-in Linux replacement (no POSIX guarantee initially)
  • Not tied to any single quantum vendor
  • Not a consumer OS in v1
  • Not focused on backward compatibility with legacy apps

4. Target Use Cases

  • Quantum Research Labs
  • AI-native edge devices
  • Neuromorphic processors
  • Hybrid classical/quantum clusters
  • Experimental smartphones or wearables
  • Education & OS research

5. System Architecture Overview

5.1 High-Level Layers

+-----------------------------------+
| QuantumOS User Space              |
|-----------------------------------|
| Quantum Runtime & Agents          |
| AI/ML Runtimes                    |
| Classical Applications            |
+-----------------------------------+
| System Services (User Space)      |
|-----------------------------------|
| Quantum Scheduler Service         |
| Memory & Entropy Manager          |
| Device Managers                   |
+-----------------------------------+
| QuantumOS Kernel                  |
|-----------------------------------|
| Microkernel Core                  |
| IPC & Capabilities                |
| Hardware Abstraction Layer (HAL)  |
+-----------------------------------+
| Hardware                          |
+-----------------------------------+

6. Kernel Design

6.1 Kernel Responsibilities

  • Process & thread management
  • Memory protection & virtual memory
  • IPC (message-passing only)
  • Capability-based security
  • Hardware interrupts
  • Quantum resource arbitration (minimal primitives only)

6.2 Kernel Non-Responsibilities

  • Filesystems
  • Network stacks
  • Quantum runtimes
  • AI frameworks

(All moved to user-space services)

7. Quantum Resource Model

7.1 First-Class Quantum Objects

The OS natively understands:

ObjectDescription
QubitHandleReference to a physical or simulated qubit
QuantumContextExecution context for quantum programs
CircuitGraphDirected acyclic graph of quantum operations
CoherenceWindowTime budget before decoherence
MeasurementEventCollapse result

These are OS-level primitives, not libraries.

8. Quantum Scheduler

8.1 Responsibilities

  • Allocate qubits fairly
  • Optimize for coherence time
  • Batch compatible circuits
  • Support speculative execution
  • Integrate with classical scheduler

8.2 Scheduling Policies (Pluggable)

  • FIFO (research baseline)
  • Coherence-aware priority
  • Energy-minimizing
  • Error-rate minimizing
  • AI-guided scheduling (future)

9. Process & Execution Model

9.1 Process Types

  • Classical Process
  • Quantum Process
  • Hybrid Process
  • Agent Process (long-lived, autonomous)

Each process declares:

  • resource needs
  • determinism requirements
  • acceptable uncertainty bounds

10. Memory Model

10.1 Classical Memory

  • Virtual memory
  • Copy-on-write
  • NUMA-aware

10.2 Quantum Memory (Conceptual)

  • No direct addressing
  • Capability-based access
  • Lifetime strictly managed
  • Explicit allocation & release

10.3 Entropy as a Resource

Entropy pools are managed explicitly:

  • RNG entropy
  • thermal noise
  • quantum randomness

11. IPC & Communication

11.1 IPC Mechanism

  • Message-passing only
  • Zero-copy where possible
  • Time-bounded delivery
  • Quantum-safe channels

11.2 Quantum IPC

Allows:

  • circuit handoff
  • measurement result propagation
  • probabilistic messaging

12. Security Model

12.1 Core Security Principles

  • Capability-based access
  • Least privilege by default
  • No ambient authority
  • Explicit quantum permissions

12.2 Threat Model

  • Malicious user processes
  • Faulty quantum hardware
  • Side-channel leakage
  • Entropy poisoning

13. Filesystem & Storage (User Space)

13.1 Storage Types

  • Classical block storage
  • Object stores
  • Quantum result archives (append-only)

13.2 Snapshot Semantics

  • Deterministic snapshot
  • Probabilistic snapshot (records distributions, not states)

14. Hardware Support

14.1 Supported (Initial)

  • x86_64
  • ARM64
  • RISC-V

14.2 Experimental

  • Neuromorphic chips
  • FPGA-based QPU simulators
  • External quantum accelerators

15. Developer Experience

15.1 Tooling

  • Cross-compiler toolchain
  • Q-aware debugger
  • Deterministic replay tools
  • Probabilistic trace visualizer

15.2 Languages (v1)

  • C (kernel)
  • Rust (user space)
  • Assembly (boot & HAL)

16. Boot Process

  1. Firmware / Bootloader
  2. QuantumOS microkernel loads
  3. Capability root established
  4. Core services launched
  5. Quantum services enumerated
  6. User environment started

17. Licensing

  • GNU GPL v2
  • Kernel and core services GPL v2
  • User applications may choose compatible licenses
  • No CLA required (DCO model preferred)

18. Open Source Governance

18.1 Contribution Model

  • Meritocratic
  • Maintainers per subsystem
  • Transparent RFC process

18.2 Code Quality Standards

  • Mandatory code review
  • Reproducible builds
  • Formal verification encouraged

19. Milestones

v0.1 - Bootstrap

  • Bootable kernel
  • IPC working
  • Basic scheduler

v0.2 - Classical Stability

  • Memory management
  • Device drivers
  • User-space services

v0.3 - Quantum Abstractions

  • Quantum objects
  • Simulator integration
  • Quantum scheduler v1

v0.4 - Hybrid Execution

  • Classical + quantum processes
  • Tooling
  • Documentation

v1.0 - Research-Ready

  • Stable APIs
  • Community governance
  • Reference hardware support

20. Success Metrics

  • Kernel boots on 3 architectures
  • External contributors onboarded
  • Quantum workloads running reproducibly
  • Academic & industry adoption

21. Future Directions (Post-1.0)

  • AI-assisted kernel tuning
  • Distributed quantum clusters
  • Cognitive agent scheduling
  • Quantum networking primitives

22. Summary

QuantumOS is not incremental.

It is a clean break—a research-grade, freedom-respecting OS designed for the computational reality that is arriving, not the one we inherited.