Webrain turns an unknown page into structured JSON without you writing a single
selector. The zero-LLM discovery pipeline is:
1. Discover the container
webrain_autoschema detects repeated container patterns on the page and
returns candidate base-selectors — e.g. .product, li.item. Zero LLM.
2. Probe the structure
Run small JavaScript to inspect what lives inside a container before you
declare fields.
webrain_extract_json builds a JSON array from a base selector + field
selectors:
Set adaptive: true to auto-relocate the container when the base selector
matches nothing (site redesigned) — it finds elements still containing ≥2 of
the field selectors.
Token discipline
Never reach for webrain_get_html for page text. webrain_snapshot,
webrain_clean, webrain_eval, and the extractors return text/structure far
cheaper. get_html is the LAST resort — only when the task explicitly
asks for raw markup.
The full recipe for paginated catalogs
Proven flow — no class assumptions, no get_html. 