lmstudio-ai/venvstacks ? reverse-engineered prompt

Build me a Python tool called venvstacks that helps package bigger Python apps without copying the same huge dependencies into every app. I want it to let me define a stack of environments in three layers, a runtime layer, a framework layer, and an application layer, then build and publish them separately but still have them work together when launched.

Please make it so the layers can share dependencies cleanly, and the app layer can run launch modules or packages directly. It should use the normal Python environment setup flow so the stacked environments just work when started. I also want a usable command line interface, clear docs, and a few examples that show how to set up, lock, build, and export a stack.

If anything in the current Python packaging ecosystem needs a recent doc lookup, go ahead and check online. Keep the project practical and focused on making layered virtual environments easy to manage and deterministic.