Thanks for your interest. Open an issue first for anything non-trivial, so we can tell you quickly whether the change fits before you spend time on it.
License
By contributing, you agree that your contribution is licensed under the project’s license (MIT), the same terms everyone else receives. No separate agreement is needed.
Conduct and security
Everyone in project spaces follows the Code of Conduct. Report vulnerabilities privately as described in SECURITY.md, not in a public issue.