Does it need the Shopify connection?

No. Without it the machine works from the store's product list pasted in and cuts files the store imports. With it on, the card creates the drafts and reads the catalog itself, and says what it did.

Will it publish for me?

It makes drafts freely and publishes a product only when you name it; a batch is listed first. That is the law on the face.

Where do prices come from?

From you, on the ladder or off it. The card never prints a price it was not given and the store's price is the only true one.

Can it attach the files?

No — that door is the app's and yours. It checks the app's list against the record by name and bytes, and the room's punch check proves a downloaded copy.

How the house's own ticket finds a product: the handle first, then a handle or title that carries exactly its words. The card runs the same reading on the store's list so the ticket is never surprised.

No. It is a card at your elbow — a person with a machine and, when you allow it, a connection. It stores nothing, runs no server and holds no key of its own.

THE INSTRUMENTS · Nº 774 · EDITION 1 · METHOD + MACHINE

LUND CARDS · THE INSTRUMENTSNº 774 PROPOSED

THE CARD AS TEXT · FOR EYES AND FOR MACHINES

THE RECEIPT CARD · the proof seat · no claim without its receipt

WAKES WHEN saying something works, is fixed, passes or is done; a report of what was built and tested; any claim someone will act on; tests, builds, checks and gates

THE LOOP

NAME — say: "This is THE RECEIPT CARD." Ask what the work is and what it must agree with; those answers are the session's source of truth.
RUN — `python3 scripts/receipt.py run --label "what this proves" -- COMMAND ...` for every test, build or check.
CLAIM — `python3 scripts/receipt.py claim "the claim" --receipt R001` — or with no receipt, and it stays UNPROVEN.
REPORT — `python3 scripts/receipt.py report` and give it with the work: PROVEN, FAILED, UNPROVEN.
SAY THE GAPS — what was not run, said plainly beside what was.
LEDGER — write the ledger line.

NEVER

"done" without a receipt
a failed run reported as passed
an untested thing called tested

THE SEAL 68 of 100 · EPIC · WITNESSED · MACHINE ABOARD · SELFTEST 8/8 · 10 TESTS · WITNESSED ON REAL WORK

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 · 598FC6D3FB6D92A8FDF4760B

THE FACE, FULL SIZE → · THE MACHINE FACE → · card.json →

THE RECEIPT CARD

the proof seat · no claim without its receipt

RUN IT · KEEP THE RECEIPT · SAY WHAT WAS NOT TESTED

EPICWITNESSEDIN CLAUDE IN LUNDR IN CHATGPT

WITNESSED — the studio saw this card run and produce what its tin promises, and wrote the date down. What the marks mean →

THE SPEC SHEET · READ BEFORE YOU BUY · THE STANDARD EVERY CARD MEETS →

SEAL: 68 of 100 · EPIC · WITNESSED
EDITION: E1
MACHINE: scripts/ · 1 command · selftest 8/8
RUNS: On your own computer. Standard library only, offline; no account, no key, no telemetry.
HOSTS: Claude · Claude Code · ChatGPT · Gemini · any AI that reads a file (HOSTS.md names each door)
LICENCE: One person, any number of their own AIs and computers · editions replace files · nothing renews · freeze, not loss
PUNCH: 598FC6D3FB6D92A8FDF4760B · sha-256 of SKILL.md · check any file against it →

CITE THIS CARDTHE RECEIPT CARD, Edition 1. Lund Studio LLC, Westminster, Colorado. https://lundr.tech/?view=receipt-card. Punch 598FC6D3FB6D92A8FDF4760B. Retrieved 2026-10-10.

What it is.

A seat that makes an AI prove before it claims: every "it works" tied to the run that shows it.

Runs each check and keeps its receipt, ties every claim to one, and reports PROVEN, FAILED or UNPROVEN.

Its laws, written into the card.

No claim of "works", "fixed", "passes" or "done" without a receipt: the command, its exit code and what it printed.
Run it; do not reason about whether it would pass. Reasoning is a plan, not a proof.
A failed run is reported as failed, with its output — never smoothed into a pass.
Say what was not tested, in the same breath as what was. UNPROVEN is an honest word.
A test that cannot fail proves nothing. Read the check before you trust it.
The report goes with the work: every claim, its status, its receipt.

How it works, once your AI has it.

NAME — say: "This is THE RECEIPT CARD." Ask what the work is and what it must agree with; those answers are the session's source of truth.
RUN — `python3 scripts/receipt.py run --label "what this proves" -- COMMAND ...` for every test, build or check.
CLAIM — `python3 scripts/receipt.py claim "the claim" --receipt R001` — or with no receipt, and it stays UNPROVEN.
REPORT — `python3 scripts/receipt.py report` and give it with the work: PROVEN, FAILED, UNPROVEN.
SAY THE GAPS — what was not run, said plainly beside what was.
LEDGER — write the ledger line.

When it says no.

"done" without a receipt.
A failed run reported as passed.
An untested thing called tested.

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
AUDIT.md · CARD.md · HOSTS.md · LICENSE-NOTE.md · MANIFEST.md · MY-LEDGER.md · SKILL.md · START-HERE.md · THE-CLAUSES.md · TIN.md · WITNESS.md · card-machine.svg · card.html · card.json · card.svg · references/THE-METHOD.md · scripts/receipt.py · tests/EVALS.md · tests/evals.json · system/short-prompt.md · system/system-prompt.md — the packet as the cards chat cut it
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 · MACHINE ABOARD · SELFTEST 8/8 · 10 TESTS · WITNESSED ON REAL WORK · AUDIT 12/12 · EDITION 1 · PUNCH 598FC6D3FB6D92A8FDF4760B

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 774 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 · NOTHING RENEWS ITSELF

OFFLINE · ONE LICENCE · PUNCH-CHECKABLE · THE STANDARD

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.

← THE INSTRUMENTS · THE FLOOR →