Validation harness for an agentic inventory layer

Attributes extracted from a real public product record, then held to one rule: every value has to quote the source, word for word.

Live extraction, claude-opus-4-8, 6.3s.

One listing in, one record out.

Raw record

{
  "id": 7036726804650,
  "title": "Anvil Chore Jacket",
  "handle": "anvil-chore-jacket",
  "vendor": "SUPER73",
  "product_type": "Apparel",
  "published_at": "2021-11-08T10:44:12-08:00",
  "updated_at": "2026-09-06T05:29:56-07:00",
  "tags": ["chord_origin: contentful", "chord_origin_id: 3ls99Nj9W13K44OnX0ZZ2q", "e-commerce", "FRD", "Irvine Showroom", "irvine showroom apparel", "JACKET", "PROMO", "RIDING GEAR"],
  "body_html": "<p>Introducing Field Research Division, <meta charset=\"utf-8\"><span data-mce-fragment=\"1\">SUPER73</span>’s technical performance apparel line specifically designed for electric motorbikes. Inspired by traditional moto-style apparel and modern urban streetwear, this ready-to-ride collection combines innovative designs, premium abrasion &amp; weather-resistant materials, with <meta charset=\"utf-8\"><span data-mce-fragment=\"1\">SUPER73</span>’s signature style.</p>\n<p>Ride in style and comfort, wherever the road leads you!</p>\n<ul>\n<li>Modern chore jacket</li>\n<li>Welded water-resistant chest and utility sleeve pocket</li>\n<li>Durable, water-resistant (DWR) Cordura stretch twill</li>\n<li>Premium YKK zippers w/ AquaGuard® polyurethane water-resistant laminated tape</li>\n<li>Interior hidden stash pocket</li>\n<li>Safety tonal reflective graphics: wrist / chest / back</li>\n<li>Elongated dropped tail</li>\n<li>Fully lined interior</li>\n<li>Male model is 6' and wearing a size Large. Female model is 5'9 and wearing a size Small.</li>\n</ul>",
  "options": [{"name": "Color", "values": ["Chalk", "Gravel", "Midnight"]}, {"name": "Size", "values": ["S", "M", "L", "XL", "2XL"]}],
  "variants": [
    {"title": "Chalk / S", "sku": "FS-C1009", "price": "120.00", "compare_at_price": "60.00", "grams": 907, "available": false},
    {"title": "Chalk / M", "sku": "FS-C1010", "price": "120.00", "compare_at_price": "60.00", "grams": 907, "available": false},
    {"title": "Chalk / L", "sku": "FS-C1011", "price": "120.00", "compare_at_price": "60.00", "grams": 907, "available": true},
    {"title": "Chalk / XL", "sku": "FS-C1012", "price": "120.00", "compare_at_price": "60.00", "grams": 907, "available": true},
    {"title": "Chalk / 2XL", "sku": "FS-C1013", "price": "120.00", "compare_at_price": "60.00", "grams": 907, "available": false},
    {"title": "Gravel / S", "sku": "FS-C0999", "price": "120.00", "compare_at_price": "60.00", "grams": 907, "available": true},
    {"title": "Gravel / M", "sku": "FS-C1000", "price": "120.00", "compare_at_price": "60.00", "grams": 907, "available": false},
    {"title": "Gravel / L", "sku": "FS-C1001", "price": "120.00", "compare_at_price": "60.00", "grams": 907, "available": true},
    {"title": "Gravel / XL", "sku": "FS-C1002", "price": "120.00", "compare_at_price": "60.00", "grams": 907, "available": true},
    {"title": "Gravel / 2XL", "sku": "FS-C1003", "price": "120.00", "compare_at_price": "60.00", "grams": 907, "available": true},
    {"title": "Midnight / S", "sku": "FS-C1004", "price": "120.00", "compare_at_price": "60.00", "grams": 907, "available": true},
    {"title": "Midnight / M", "sku": "FS-C1005", "price": "120.00", "compare_at_price": "60.00", "grams": 907, "available": true},
    {"title": "Midnight / L", "sku": "FS-C1006", "price": "120.00", "compare_at_price": "60.00", "grams": 907, "available": true},
    {"title": "Midnight / XL", "sku": "FS-C1007", "price": "120.00", "compare_at_price": "60.00", "grams": 907, "available": true},
    {"title": "Midnight / 2XL", "sku": "FS-C1008", "price": "120.00", "compare_at_price": "60.00", "grams": 907, "available": true}
  ]
}

Public Shopify product feed, super73.com/products/anvil-chore-jacket.json, retrieved 6 September 2026. SUPER73 is a brand Carro publishes as a network success story. Nothing has been tidied, including the editor markup left in the description.

Shipped to the feed

{
  "title": "Anvil Chore Jacket",
  "brand": "SUPER73",
  "category": "Apparel",
  "color_options": "Chalk, Gravel, Midnight",
  "size_options": "S, M, L, XL, 2XL",
  "price_usd": "120.00",
  "fabric_composition": "Cordura stretch twill",
  "weather_resistance": "Water-resistant (DWR)"
}

Each of these 8 values appears, character for character, inside a sentence that appears in the record above. The feed asked for 10 fields.

What the harness would not ship.

A field a marketplace requires, filled by a model that had nothing to read. This is the failure that poisons a catalogue quietly, because the value looks right.

Held for human reviewcountry_of_origin

not stated

The marketplace feed requires this field. The listing never states it, so there is nothing to extract.

The model offered no sentence from the record, because the record contains none.

Also held on this listing: care instructions. None of them appears in the record, so there was nothing to quote.

Run the same check across the 11 apparel listings in this one catalogue and 5 of them state no fibre content at all. At 250,000 SKU the question is not whether a model can read a listing. It is what the pipeline does with the ones that never said.