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Dev tools · July 31, 2026

GS

Great Spectations, the Spec Checker

I've worked on several projects writing and implementing specifications (particularly CLN): I've found the specs I write are much better when I quote them in the implementation, so I can see what implementers need to know. Also, when specs change in development, it's almost trivial to find where to update the code. This project is a formalization of my various hacky scripts which ensure the requirements are accurately quoted, and give coverage if any are missing. Not a major Opus, but I hope someone else finds it useful!

Great Spectations, the Spec Checker launched on July 31, 2026 with 5 votes, #4,557 of 24,623 launches that month and more than 75% of that year's launches.

What it does

Great Spectations checks that the spec quotes embedded in your source comments still say what the spec says. BOLT, BIP, RFC, or your own SPECIFICATION.md.

Implementing or developing a spec? You need Great Spectations! A real, runnable example: Python and Rust each quote different clauses of the same paragraph; one of them botches a quote, one clause never gets quoted at all. Generated straight from examples/generate.py running the actual tool — see examples/ in the repo. """Great Spectations demo: quoting Dickens instead of a protocol spec. Nothing here is a real "requirement" -- it's just prose from a novel, used to show that greatspectate checks any text source, not only specs. """ # DICKENS #1: it was the age of wisdom, it was the age of foolishness, WISDOM = "the age of wisdom" FOOLISHNESS = "the age of foolishness" # DICKENS #1: it was…from greatspectations.org

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