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.

ENGINES · Nº 790 · EDITION 1 · METHOD + MACHINE

LUND CARDS · ENGINESNº 790 PROPOSED

THE CARD AS TEXT · FOR EYES AND FOR MACHINES

THE DARKROOM CARD · the filter seat · every season, subject and hour

WAKES WHEN a photo needs a filter for its season, its subject or its hour; which filter for a portrait at golden hour, a bird, a product on white; a LUT for Photoshop, Lightroom, Premiere, Resolve, Final Cut or a phone editor

THE LOOP

NAME — `This is THE DARKROOM CARD.`
ASK — the photo, its subject, its hour, its season, and the editor it will be opened in.
PICK — `darkroom.py pick`: the subject first when colour must stay true, then the light, then the season.
APPLY — `darkroom.py apply`; look at the skin and the whites before anything else.
WRITE — `darkroom.py cube` at the size the editor wants; say how to load it there.
LEDGER — write the ledger line.

NEVER

a face or body retouched
a LUT sold as a fix
skin pushed off its tone

THE SEAL 68 of 100 · EPIC · WITNESSED · 65 filters, the machine, a run on the house test chart

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 · 606CEAAB32B9555C328BFBF3

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

THE DARKROOM CARD

the filter seat · every season, subject and hour

SKIN TRUE · PRODUCT TRUE · 65 FILTERS AS LUTS

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 · witnessed 2026-10-03
MACHINE: scripts/darkroom.py · 2 commands · selftest 163/163
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: 606CEAAB32B9555C328BFBF3 · sha-256 of SKILL.md · check any file against it →

CITE THIS CARDTHE DARKROOM CARD, Edition 1. Lund Studio LLC, Westminster, Colorado. https://lundr.tech/?view=darkroom-card. Punch 606CEAAB32B9555C328BFBF3. Retrieved 2026-10-10.

What it is.

Sixty-five photo filters as real 3D LUTs in five families — the hours of the day, the seasons, the subjects (landscape to portrait to birds to products), the styles and black and white — and a machine that picks the right one for a photo, applies it, and writes the .cube any editor opens.

Every filter proves its own laws: skin-safe filters move a skin tone under 3°, true-colour filters keep grays gray, nothing clips or runs backwards. A filter changes colour and tone only, and says so.

Its laws, written into the card.

The subject decides first when colour must stay true — people, products, animals; then the light; then the season.
Skin-safe filters move a skin tone under 3°; true-colour filters keep grays gray — proved by the machine, not promised.
A filter changes colour and tone only; it never sharpens, denoises or fixes focus, and never claims to.
The previews are one scene and one chart under every filter — nothing retouched, nothing chosen to flatter.

How it works, once your AI has it.

NAME — `This is THE DARKROOM CARD.`
ASK — the photo, its subject, its hour, its season, and the editor it will be opened in.
PICK — `darkroom.py pick`: the subject first when colour must stay true, then the light, then the season.
APPLY — `darkroom.py apply`; look at the skin and the whites before anything else.
WRITE — `darkroom.py cube` at the size the editor wants; say how to load it there.
LEDGER — write the ledger line.

When it says no.

Retouching a face or a body — a filter changes colour, never a person.
Selling a LUT as a fix: it does not sharpen, rescue exposure or fix focus.
The studio's own grade recipes — sealed; THE GRADE CARD teaches grading as a method.

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/darkroom.py · references/THE-FILTERS.md · references/HOW-TO-USE.md · WITNESS.md · EVALS.json · EVALS.md · scripts/evals.py — the machine, the filter index, the how-to and the witness
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 163/163 · AUDIT 12/12 · WITNESSED 2026-10-03 IN CLAUDE · EDITION 1 · PUNCH 606CEAAB32B9555C328BFBF3

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 790 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.

← ENGINES · THE FLOOR →

A LUT IS COLOUR AND TONE ONLY, THE SAME MOVE ON EVERY PIXEL: IT CANNOT SEE A FACE, FIX FOCUS OR TELL LIGHT FROM PAINT. START FROM A CORRECTLY EXPOSED, WHITE-BALANCED PHOTO. THE MACHINE NEEDS PYTHON 3 WITH NUMPY AND PILLOW; THE .CUBE FILES IT WRITES NEED NOTHING. · NOT A PAYMENT CARD · © 2026 LUND STUDIO LLC