How to use a snap within my snap?

I’d like to use the node snap within my snap. How do I do this? Can it only be done through interfaces or can the snap literally be included inside my snap?

If interfaces are the way to do it, can I make it so node is installed when my snap is installed?

Check out the stage-snaps Snapcraft property, using it via the content interface is also technically possible if the runtime snap exposes such interface.

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Ah that sounds like exactly what I need. Is it documented anywhere? It doesn’t seem to have made it into yet.

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It’s in the parts reference:

You’re right about the complete snapcraft reference not having it. It doesn’t seem like that page gets updated as often as the individual top-level and parts reference pages.

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I’ve added the missing entry to the standalone reference.