Cosmos is an operating system "construction kit". Build your own OS using managed languages such as C#, VB.NET, and more!
Star History
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+80
STARS · LAST 30 DAYS
3
PER DAY
#99
MOST-STARRED C#
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +1 | +80 | +270 |
| Per day | 1 | 3 | 3 |
| Forks gained | +2 | +12 | +29 |
Cosmos gained 80 stars in the last 30 days, about 3 a day, and now has 3.2K. It is about 12 years old and has averaged roughly 267 stars a year. It ranks #99 among C# repositories and #2,006 across all languages on GitHubRepo.
Trending Record
8
DAYS ON TRENDING
#839
BEST RANK
Sep 24, 2026
FIRST APPEARANCE
Active
STATUS TODAY
Cosmos has maintained a continuous presence across global trending indexes, peaking at #839. Below is the 30-day activity profile:
💡 Overview
Cosmos is an open-source project written in C#: Cosmos is an operating system "construction kit". Build your own OS using managed languages such as C#, VB.NET, and more!.
Engineered for speed, consistency, and developer ease, it solves common hurdles in hacktoberfest. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in C# for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ git clone https://github.com/CosmosOS/Cosmos.git
cd Cosmos⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
C# environment and standard tooling
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
Cosmos coordinates its core functionality through a modular C# pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Production System Integration
Embed Cosmos into C# backend services to handle core application logic.
CI/CD Automated Pipelines
Run automated validation, builds, and integration suites during deployments.
Developer Tooling & Workflows
Accelerate developer onboarding with pre-configured project utilities.
Open Source Extension
Fork and customize internal modules under the repository's open BSD-3-Clause license.
🚀 Getting Started
Install Cosmos using your package manager: `git clone https://github.com/CosmosOS/Cosmos.git`
Initialize your project workspace or configuration file for Cosmos.
Import Cosmos into your codebase or invoke it directly from your terminal.
Execute your test suite or run `Cosmos --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with C#, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
CosmosOS/Cosmos is currently ranked #2,006 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #2,001 | wgtunnel/android | Kotlin | ★ 3.2K | Compare ↗ |
| #2,002 | ThirteenAG/WidescreenFixesPack | C++ | ★ 3.2K | Compare ↗ |
| #2,003 | hairyhenderson/gomplate | Go | ★ 3.2K | Compare ↗ |
| #2,003 | pglombardo/PasswordPusher | Ruby | ★ 3.2K | Compare ↗ |
| #2,005 | wizarrrr/wizarr | Python | ★ 3.2K | Compare ↗ |
| #2,006 | CosmosOS/Cosmos This Project | C# | ★ 3.2K | |
| #2,006 | Wisser/Jailer | Java | ★ 3.2K | Compare ↗ |
| #2,008 | Alexey-T/CudaText | Python | ★ 3.2K | Compare ↗ |
| #2,009 | subsurface/subsurface | C++ | ★ 3.2K | Compare ↗ |
| #2,010 | elie222/rakazo | TypeScript | ★ 3.2K | Compare ↗ |
| #2,011 | wildfly/wildfly | Java | ★ 3.2K | Compare ↗ |
Frequently Asked Questions
What does Cosmos do? +
Cosmos is an operating system "construction kit". Build your own OS using managed languages such as C#, VB.NET, and more!
What language is Cosmos written in? +
The primary language is C#. Topics include: hacktoberfest.
Is Cosmos actively maintained? +
Yes, the last recorded push was on Sep 27, 2026 with 6 open issues being tracked.
How many stars does Cosmos have? +
Cosmos has 3,205 stars and 588 forks on GitHub.
How does Cosmos rank among GitHub repositories? +
With 3,205 stars, CosmosOS/Cosmos is ranked #2,006 globally across all repositories tracked on GitHubRepo and #99 among C# projects.
What license is Cosmos distributed under? +
The repository reports a BSD-3-Clause license. Always verify the repository LICENSE file for legal terms.
