Four new nodes that collapse common multi-node chains for path construction,
string templating, substring extraction, and boolean selection.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Auto-discovers JSON keys and exposes them as typed output slots.
Includes JS frontend for refresh, connection-safe updates, and
workflow persistence of keys and types.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>