Local tool namespace in pyproject.toml?

PEP 518 defines the tool table and recommends as a namespace under tool: We need some mechanism to allocate names within the tool.* namespace, to make sure that different projects don’t attempt to use the same sub-table and collide. Our rule is that a project can use the subtable tool.$NAME if, and only if, they own the entry for $NAME in the Cheeseshop/PyPI. This is all well and good for public tools released on PyPI, but what if a repo has some local tools they want to drive from the pypro...