Keep an eye on HTMLx

Possible “spec” for a common glimmer-like syntax.

Might allow css blocks to have a shared AST processor or at least a shared syntax among many implementations.

https://github.com/Rich-Harris/HTMLX/commits/master/README.md

Read the linked HTMLX README history first, then compare its proposed glimmer-like syntax with the CSS Blocks project described in this issue. Done would require a concrete decision about whether a shared syntax or AST processor is feasible, but the issue does not identify implementation files or tests.

Written by the indexing model from the issue text.