giles 5578923242 Fix defhandler to produce sx wire format instead of HTML ...

execute_handler was using async_render() which renders all the way to
HTML. Fragment providers need to return sx source (s-expression strings)
that consuming apps parse and render client-side.

Added async_eval_to_sx() — a new execution mode that evaluates I/O
primitives and control flow but serializes component/tag calls as sx
source instead of rendering them to HTML. This mirrors how the old
Python handlers used sx_call() to build sx strings.

Also fixed: _ASER_FORMS checked after HTML_TAGS, causing "map" (which
is both an HTML tag and an sx special form) to be serialized as a tag
instead of evaluated. Moved _ASER_FORMS check before HTML_TAGS.

Also fixed: empty? primitive now handles non-len()-able types gracefully.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-03-03 01:00:00 +00:00

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