WAKES WHEN finding the best price for a product you name; 'where is this cheapest', 'is this a good deal', 'compare prices for'; checking a deal, a listing or a price before you buy; a model number, a product link or a barcode typed in; 'is it worth it', 'refurbished or new', 'which is the better value', 'what will it cost me over the years'
THE LOOP
NAME — `This is THE DIGITAL SHOPPER.`
PIN — the exact product: brand, model number, colour or size, condition, and whether a bundle counts. Ask the one missing detail if it changes the product.
SEARCH — wide, with the host's web search: retailers, the brand's own store, marketplaces; log every query.
READ — each seller's page: price, shipping, fees, stock, condition, seller, and the time. What could not be read is marked snippet or unread.
MATCH — leave out what is not the same product, and say why; list other conditions apart.
RANK — hand the offers to scripts/compare.py (or, where no code runs, do its arithmetic in the open): the real total, the flags, the ranking.
WEIGH — pros and cons of every offer from its terms; the product's pros and cons from named sources; the price points, refurbished to the next generation; the ranking by your weights.
VALUE — the cost of owning it over the years you will keep it: running costs, repairs, resale; per year and per use.
REPORT — the six-part receipt: prices, the weigh, price points, your weights, long-term value, the call — every link and time, what was left out and why, what was not checked.
LEDGER — the product, the receipt number, and next: re-check the link before buying.
NEVER
buys, logs in or pays
names a snippet price the best
ranks a different product
THE SEAL 68 of 100 · EPIC · WITNESSED · the method and a machine, the weigh witnessed in Claude with web search
IT CAN BE WRONG an AI reading a text file: it can be wrong; check what matters. THE-CLAUSES.md rides in the packet and is part of the licence.
THE PUNCH · SHA-256 OF SKILL.MD · E3CA93477234A1FA194287FC
CITE THIS CARDTHE DIGITAL SHOPPER, Edition 3. Lund Studio LLC, Westminster, Colorado. https://lundr.tech/?view=digital-shopper-card. Punch E3CA93477234A1FA194287FC. Retrieved 2026-10-10.
What it is.
Type the product in; the card finds what it costs everywhere it can reach and tells you what you would actually pay. It pins the exact product first — model number, colour, size, bundle, condition — because two listings with the same name are often not the same thing.
Then it searches wide with your AI's own web search, reads each seller's page rather than trusting the search snippet, and hands the offers to its machine, compare.py, which ranks them by the real total — price, shipping and fees — and flags what it cannot trust: snippet-only prices, unknown shipping, marketplace sellers, other conditions, and anything too good to be true.
Then it weighs the decision: the pros and cons of every offer from the terms it read — warranty, returns, seller, delivery — the product's own pros and cons from sources it names, the price points from refurbished up to the next generation, a ranking by your own weights, and the long-term cost of owning it — running costs, repairs and resale — with every input sourced or marked ASSUMPTION.
It never buys, never logs in and never takes a payment. You get a six-part receipt — prices, the weigh, price points, your weights, long-term value, the call — with every link and when each price was read; the call is written as trade-offs, and you decide.
Its laws, written into the card.
SAME PRODUCT OR IT DOES NOT COUNT. Model, colour, size, bundle and condition are pinned first; a listing that differs is left out, with the reason printed.
THE TOTAL, NOT THE STICKER. Price plus shipping plus fees, and tax where the page shows it. Unknown shipping is unknown, never free.
READ THE PAGE, NOT THE SNIPPET. A search snippet can be days old; a price not read on the seller's own page is marked and never named the best.
EVERY PRICE WITH ITS LINK AND ITS TIME. Prices change by the minute; the receipt says when each was read.
NEW IS NEVER RANKED AGAINST REFURBISHED. Other conditions are listed apart.
TOO GOOD TO BE TRUE IS A FLAG. A total far under the others is flagged, never recommended; marketplace and unknown sellers are named.
PROS AND CONS FROM SOURCES. Offer pros and cons come from the terms read; the product's come from sources printed beside each. None found, none printed.
YOUR WEIGHTS, SHOWN. The value ranking uses your weights and prints every component; an unknown input counts low and is named; only terms read on the seller's page are weighed.
LONG-TERM VALUE SHOWS ITS WORKING. Cost of owning = paid + running + repairs − resale; every input sourced or ASSUMPTION; nothing unknown is guessed.
NO INVENTED DEALS. No made-up price, coupon, price history or 'lowest ever'; history only from a tracker, with its date.
TRADE-OFFS, NOT ORDERS. The call says what each choice gets you. The card never buys, logs in or pays, and has no stake in where you buy.
How it works, once your AI has it.
NAME — `This is THE DIGITAL SHOPPER.`
PIN — the exact product: brand, model number, colour or size, condition, and whether a bundle counts. Ask the one missing detail if it changes the product.
SEARCH — wide, with the host's web search: retailers, the brand's own store, marketplaces; log every query.
READ — each seller's page: price, shipping, fees, stock, condition, seller, and the time. What could not be read is marked snippet or unread.
MATCH — leave out what is not the same product, and say why; list other conditions apart.
RANK — hand the offers to scripts/compare.py (or, where no code runs, do its arithmetic in the open): the real total, the flags, the ranking.
WEIGH — pros and cons of every offer from its terms; the product's pros and cons from named sources; the price points, refurbished to the next generation; the ranking by your weights.
VALUE — the cost of owning it over the years you will keep it: running costs, repairs, resale; per year and per use.
REPORT — the six-part receipt: prices, the weigh, price points, your weights, long-term value, the call — every link and time, what was left out and why, what was not checked.
LEDGER — the product, the receipt number, and next: re-check the link before buying.
When it says no.
Buying, checking out, entering card details, or logging into anyone's account.
Getting past a login, a paywall, a captcha or a site's blocks to read a price.
Recommending counterfeit, grey-market or stolen-goods sources; a seller without the manufacturer's warranty is named as such.
Prices for anything illegal to buy where the buyer lives.
Which product is right for you → THE SOURCE CARD. Your own prices as a seller → THE PRICE CARD.
What’s in the buy.
CARD.md — the whole card · SKILL.md — the door your AI reads first · START-HERE.md — the first five minutes
scripts/compare.py · references/THE-WEIGH.md · references/LONG-TERM-VALUE.md · references/MATCH-RULES.md · references/TRUST-SIGNALS.md · references/THE-SHOPPERS-RECEIPT.md · WITNESS.md · EVALS.json · EVALS.md · scripts/evals.py — the machine, the weigh, the long-term method, the first receipt and the tests
MY-LEDGER.md · TIN.md · LICENSE-NOTE.md · THE-CLAUSES.md · card.svg + card-machine.svg + card.json · card.html · the doors for ChatGPT, Gemini, Cursor, Copilot and the rest, and an MCP door
PROOF · SELFTEST 31/31 · AUDIT 12/12 · WITNESSED 2026-09-30 IN CLAUDE · EDITION 3 · PUNCH E3CA93477234A1FA194287FC
ON EVERY DOOR · A CARD FOR YOUR AI, A FILE FOR YOUR COMPUTER
In Claude: turn on code execution under Settings › Capabilities, then Customize › Skills › + › Create skill, and upload the zip as it is — START-HERE.md in the box walks you through it, and tells you how to keep the ledger. In ChatGPT, Gemini and the rest: a Project, a GPT or a Gem with the card’s files attached and the short door in the box pasted as its instructions. The words run anywhere an AI reads Markdown; the machines run wherever the host runs Python. Witnessed in Claude only. The host marks →
Take it.
Nº 438 PROPOSED · ONE PAYMENT
Sold as is under the term printed. A card instructs an AI you operate; results depend on your model, your files and your judgement. Not legal, tax, medical or financial advice. The terms →
One payment. The file is yours to keep and keeps working at its edition; new editions issued in the year after you buy reach you by email as replacement files. Tax is added at checkout where it applies. Nothing auto-renews.
ONE PAYMENT — NOTHING RENEWS ITSELF. CHECKOUT IS SHOPIFY’S OWN; YOUR CARD COMES BY EMAIL AFTER IT.
