The standards and protocols for Project Jupyter are defined in repositories on jupyter GitHub organization. In particular,
- The Jupyter schemas (like the notebook format): https://github.com/jupyter/schema
- The kernel protocol: https://github.com/jupyter/kernel-protocol
- The Jupyter flavored Markdown: https://github.com/jupyter/markdown
