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 783 · EDITION 1 · METHOD + MACHINE

LUND CARDS · THE INSTRUMENTSNº 783 PROPOSED

THE CARD AS TEXT · FOR EYES AND FOR MACHINES

THE REGRESSION CARD · the release seat · nothing quietly gets worse

WAKES WHEN a new version of a prompt, bot, model, agent or app; a release decision; test results over time; a fix that might have broken something else

THE LOOP

NAME — say: "This is THE REGRESSION CARD." Ask what the work is and what it must agree with; those answers are the session's source of truth.
RUN — the same cases on the new version; results as lines of {"id", "pass"}.
RECORD — `python3 scripts/regress.py record RESULTS.jsonl --version v2`.
COMPARE — `python3 scripts/regress.py compare v1 v2` — a REGRESSION stops the release.
TREND — `python3 scripts/regress.py trend`.
GROW — every failure found in the wild becomes a case.
LEDGER — write the ledger line.

NEVER

a release over a regression
a rising pass rate hiding a new failure
a version recorded twice

THE SEAL 68 of 100 · EPIC · WITNESSED · MACHINE ABOARD · SELFTEST 6/6 · 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 · 7C59E19BF18E5FD69F8F0C66

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

THE REGRESSION CARD

the release seat · nothing quietly gets worse

SAME CASES EVERY VERSION · A REGRESSION STOPS THE RELEASE · THE RATE NEVER HIDES ONE

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 6/6
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: 7C59E19BF18E5FD69F8F0C66 · sha-256 of SKILL.md · check any file against it →

CITE THIS CARDTHE REGRESSION CARD, Edition 1. Lund Studio LLC, Westminster, Colorado. https://lundr.tech/?view=regression-card. Punch 7C59E19BF18E5FD69F8F0C66. Retrieved 2026-10-10.

What it is.

A seat that runs the same test cases on every version of an AI system and stops a release when anything that used to pass now fails.

Records each version's results, compares two versions into regressions, fixes and still-failing, and shows the pass rate over time.

Its laws, written into the card.

Every version runs the same cases. New cases are added, never swapped in silently.
A regression — a case that passed and now fails — stops the release until it is fixed or knowingly accepted in writing.
A rising pass rate never hides a regression. Read the case list, not only the rate.
Every failure found in the wild becomes a new case.
A version is recorded once; a re-run gets a new version name.

How it works, once your AI has it.

NAME — say: "This is THE REGRESSION CARD." Ask what the work is and what it must agree with; those answers are the session's source of truth.
RUN — the same cases on the new version; results as lines of {"id", "pass"}.
RECORD — `python3 scripts/regress.py record RESULTS.jsonl --version v2`.
COMPARE — `python3 scripts/regress.py compare v1 v2` — a REGRESSION stops the release.
TREND — `python3 scripts/regress.py trend`.
GROW — every failure found in the wild becomes a case.
LEDGER — write the ledger line.

When it says no.

A release over a regression.
A rising pass rate hiding a new failure.
A version recorded twice.

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/regress.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 6/6 · 10 TESTS · WITNESSED ON REAL WORK · AUDIT 12/12 · EDITION 1 · PUNCH 7C59E19BF18E5FD69F8F0C66

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 783 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 →

IT COMPARES THE RESULTS IT IS GIVEN. IT CANNOT TELL IF THE CASES ARE THE RIGHT CASES — A REGRESSION SET ONLY COVERS WHAT SOMEONE THOUGHT TO TEST, SO ADD A CASE FOR EVERY FAILURE FOUND. · NOT A PAYMENT CARD · © 2026 LUND STUDIO LLC