For us older engineers, full-stack was hardware up to OS up to apps. Quite a few projects did that. Haskell is more full stack via that definition given it can build hardware (Bluespec), OS's (House), system code (Ivory), and web apps. Worst case, use it as a DSL to output the language of your choosing like 4GL's used to.
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"Full stack would be..."
For us older engineers, full-stack was hardware up to OS up to apps. Quite a few projects did that. Haskell is more full stack via that definition given it can build hardware (Bluespec), OS's (House), system code (Ivory), and web apps. Worst case, use it as a DSL to output the language of your choosing like 4GL's used to.