Negotiating Enhancements
No IT solution is delivered using code written solely by the solution provider. There is always dependent code written by a third party. Dependency management tooling has proliferated in every technology sector to support this. At the language level, this is handled by maven, gradle, npm etc. At the platform level, it’s handled by Homebrew on Mac and various options on Linux. At the DevOps level, it’s handled by Docker, Helm, etc.
And every solution includes an implicit assumption that the dependent code will continue to work as it does and provide whatever the consumer requires. For product offerings, this may be in the form of OEM agreements. For open source, it still exists, whether consumers are willing to admit it to themselves or not.