CosmosOS/Cosmos

Health v2 · maintenance only

Adoption not part of the score

3188 stars · 581 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Cosmos is an operating system construction kit that lets developers build bare-metal OS kernels using .NET languages like C#, VB.NET, and F#. It includes the IL2CPU compiler that converts IL code into native machine code, plus a standard library providing filesystem, graphics, networking, and audio primitives.

Use cases

• build a hobby operating system in C#
• write a bare-metal kernel without assembly
• learn OS development with managed code
• compile C# to run directly on hardware
• create a custom bootable OS from .NET code
• experiment with low-level memory and assembly access from C#

When to choose

• you want to write an OS in C# or another .NET language instead of C or assembly
• you are learning operating system fundamentals with a managed-language toolkit
• you need a ready-made kernel base with filesystem, graphics, and networking primitives

When to avoid

• you need a production-grade OS with mature drivers and hardware support
• you want to develop an OS in C, Rust, or assembly with full low-level control
• you need a general-purpose .NET runtime for applications rather than OS development

Facets

framework · maturity active

compiler programming-language embedded file-system graphics networking sdk operating-systems compilers developer-tools embedded-systems dotnet cpp windows cross-platform operating-system-development il2cpu bare-metal csharp kernel-development managed-code linux

Member repositories

For agents

markdown · JSON · MCP: product_card(name="CosmosOS/Cosmos")