Usage Policy

Last revised: May 29, 2026

By publishing to or using Sysand Package Index, you agree to the Terms of Use, which incorporate this policy. For privacy matters, see the Privacy Policy. For vulnerability disclosure and reporting malicious packages, see the Security Policy.

Acceptable Content

Sysand Package Index hosts SysML v2 and KerML model packages for use with SysML v2 tooling. We do not allow:

• Malicious or unsafe content. Code or model logic designed to harm users, exfiltrate data, embed command-and-control behavior, or otherwise abuse downstream tooling. Security-research artifacts published in good faith are welcome — contact us first if in doubt.
• Non-functional packages. Empty archives, name-squatting placeholders, or releases with no real model content. Reserving names you do not actively maintain falls under this rule.
• Content unrelated to systems and software modeling. Packages whose primary purpose is to distribute media, executables, generic datasets, or anything else better served by another index.
• Proprietary or confidential material. Anything you are not entitled to publish openly, including unlicensed third-party code, secrets, or data subject to confidentiality obligations.
• Infringing content. Material that violates third-party copyright, trademark, patent, or other rights.
• Abusive or inappropriate content. Harassing, deceptive, or otherwise inappropriate material — this applies to package names, publisher names, descriptions, and READMEs as well as the model content itself.

Publisher Responsibilities

When you publish a package, you confirm that:

• You (co-)own the rights to the content or otherwise have permission to redistribute it under the license declared with the package.
• The package metadata you provide is accurate.
• You consent to Sensmetry running automated validations on the package (for example, via the Syside tool) and publishing the validation results alongside the package.

The licence you grant Sensmetry to host and distribute your package is set out in Section 5 of the Terms of Use.

Names and Removal

• Publisher and project names are assigned on a first-come, first-served basis. Sensmetry will not reassign an active name against the wishes of its current publisher.
• Published versions are meant to be durable so that downstream projects can depend on them. Prefer publishing a new version with the fix over removing an existing release.
• You may request removal of a release or project you publish by contacting sysand@sensmetry.com.
• Sensmetry may remove content, suspend accounts, or refuse uploads that violate this policy. Where time permits we will reach out first; for active malware, intellectual-property violations, or coordinated abuse, removals may be immediate.

Conduct

We expect everyone interacting with Sysand Package Index — publishers, maintainers, and other users — to communicate respectfully. Personal attacks, harassment, and discriminatory remarks directed at other users are not welcome on any surface under our control, including package metadata and READMEs.

Reporting

• Policy violations and abuse: sysand@sensmetry.com
• Security vulnerabilities and malicious packages: see the Security Policy.
• Copyright or trademark complaints: sysand@sensmetry.com, with enough detail to identify the work and the affected release.

Changes to This Policy

We may update this policy from time to time to reflect new situations or emerging abuse patterns. Material changes will be announced through Sysand Package Index. The notice period and acceptance mechanism for changes are governed by Section 9 of the Terms of Use.