* test(mcp): check advertised schemas against a portable dialect in every profile
* fix(mcp): re-emit advertised patterns in a portable regex grammar
* fix(mcp): validate advertised dialect by selected profile
* fix(mcp): preserve schema widening through references
* fix(mcp): refuse zero-padded repeat bounds and record host-specific path patterns
* fix(mcp): keep references valid when presentation widens their targets
* fix(mcp): relax references into negations and conditionals presentation may remove
* fix(mcp): keep astral literals and dynamic references widening in every mode
* fix(mcp): omit astral literals and relax untracked references when presentation widens
* fix(mcp): read reference pointers by schema position, not segment spelling
* fix(mcp): protect references into collapsing boolean unions and keep referencing branches out of the collapse
* fix(mcp): omit patterns whose classes name astral characters
* fix(mcp): decide union collapse and pointer protection from canonical branches
* docs(mcp): document non-u astral matching and pin BMP agreement across V8 modes
* test(mcp): expect the advertised base64 schema to omit the unbounded pad-bit probe
* fix(mcp): protect references into unevaluated keywords lost evaluation removes
* fix(mcp): emit stack-safe classes with non-ASCII members and protect draft-07 reference siblings
* fix(mcp): protect references into literal siblings of relaxed draft-07 references
morluto