The COSS Standard: Principles for Software Neutrality

The Contriboss (COSS) Standard is defined by a set of five core principles that ensure software projects remain neutral, interoperable, and free from vendor lock-in. These principles guide projects that wish to bear the COSS Mark, signaling a commitment to building trustworthy and open technology.

Why the COSS Standard Matters

In an era of increasing vendor lock-in and proprietary silos, the COSS Standard provides a framework for building software that:

The Five Core Principles

Adherence to these principles is what gives the COSS Mark its meaning and assures users and developers that a project is genuinely dedicated to fostering trust, user freedom, and robust standardization.

1. Universal Access

Ensuring standard versions provide universal access without discriminatory restrictions or artificial barriers.

2. Anti-Vendor Lock-in

Architected against vendor lock-in with neutral naming conventions and design patterns that prevent ecosystem capture.

3. Optional Dependencies

Core functions operate without mandatory third-party dependencies, with clear separation between essential and optional features.

4. Modular Scope

Well-defined, composable building blocks with clear boundaries that enable standardization and interoperability.

5. Contributor Ethics

Ethical development practices guided by transparency, fairness, and commitment to the common good.

COSS.toml Metadata Standard

COSS projects include standardized metadata in a coss.toml file to help AI tools understand project structure, build processes, and conventions without guesswork. This reduces computational waste and enables more accurate AI assistance.

Download COSS.toml Template

Detailed Exploration

For comprehensive details on each principle, including specific requirements, implementation guidance, and examples:

View Complete Standard Overview →


The COSS Standard represents a commitment to building technology that serves users and the broader ecosystem, not just vendor interests. Join us in creating a more open and trustworthy digital future.