I've been spending the last couple months working on a Markdown-like lightweight document format. (Short pitch, it's like Markdown but with natural extension points built in and far less subtlety).

A huge part of my goal is to write a "spec" of the format. I want it to be good enough that users can legitimately file bugs against my primary implementation for not following the spec: it is the source of truth about the language.

So, of course, I find it really interesting to discuss the grey space of "shrug, maybe this is correct". This whole process has been driving me to (a) make the language itself resilient and permissive so that it has _some_ answer for nearly all documents and (b) to constrain the output of the system such that it throws away as much information as possible, enabling us to make claims about semantics more confidently.

I don't know if I'm going to succeed at all my goals. This is sort of a small project and definitely far simpler than, say, a web browser. At the same time, it's very hard to narrow in on what it is, really, that I want such a spec to say.