THE UNDERSTUDY CARD · everything standing in, labelled
WAKES WHEN a site or page is about to be handed over, or someone asks if its fonts are real
THE LOOP
tokens · what the brand declares
fonts · served, or standing in
scan · fonts, colours, files, words
label or replace every stand-in
scan again; the report rides along
NEVER
Call a font real that is only assumed
Fetch a font or a file from another host
Pass a build whose list it has not shown
IT MAKES scan — every stand-in, by kind and file; fonts — each named font: served, or standing in and why; tokens — the colours and fonts a tokens file declares.
THE STANDARD label what stands in; served means beside; the tokens decide colour; named means present; draft words out; read, never fetched.
PROOF SELFTEST 8/8 · witnessed in Claude 2026-10-11 · Edition 1.
THE SEAL 98 of 100 · LEGENDARY · WITNESSED · Trigger 5 · Machinery 5 · Law 5 · Portability 5 · Proof 5
IT CAN BE WRONG an AI reading a text file: it can be wrong and can invent a number, a rule, a name or a date; check what matters against your own records and the source; the risk is yours. THE-CLAUSES.md rides in the packet and is part of the licence.
THE PUNCH · SHA-256 OF SKILL.MD · 48D0454DE535DAB52D5F6EBA
CITE THIS CARDTHE UNDERSTUDY CARD, Edition 1. Lund Studio LLC, Westminster, Colorado. https://lundr.tech/?view=understudy-card. Punch 48D0454DE535DAB52D5F6EBA. Retrieved 2026-10-11.
What it is.
Reads a web build (HTML, CSS, SVG, Liquid, JS, Markdown) for its stand-ins. scan lists the fonts a page names that no @font-face serves from beside the build, the hex colours that are not in the tokens file (#fff and #FFFFFF read as one), the pictures, fonts, styles and scripts named in src, href or url() that are not on disk, and the placeholder words left in (lorem ipsum, TODO, TBD, FIXME, an empty link), and writes the list as a report; fonts says for each named font whether it is served or standing in; tokens reads a CSS or JSON tokens file back.
It carries a machine that shows its working: scan — every stand-in, by kind and file; fonts — each named font: served, or standing in and why; tokens — the colours and fonts a tokens file declares — 8 checks in its selftest, every command on the record. It will never call a font real that is only assumed; never fetch a font or a file from another host; never pass a build whose list it has not shown.
Six laws, written into the card.
They are in the card itself, so the AI follows them.
LABEL WHAT STANDS INAnything that only pretends to be there is listed before it is mistaken for the real thing.
SERVED MEANS BESIDEA font is real when an @font-face serves its file from beside the build; fetched or assumed is standing in.
THE TOKENS DECIDE COLOURA colour not in the tokens file is typed by hand; with no tokens file, every colour is listed as typed.
NAMED MEANS PRESENTA file named in src, href or url() must be on disk beside the build.
DRAFT WORDS OUTlorem ipsum, TODO, TBD, FIXME, XXX and an empty link are left-overs; an input's placeholder is not.
READ, NEVER FETCHEDNothing is downloaded; a file on another host is named, not checked.
What rides in the card.
In the card’s own voice, with a machine that shows its working.
THE GUIDEreferences/THE-STAND-INS.md
THE MACHINEunderstudy.py · three commandsscan — every stand-in, by kind and file; fonts — each named font: served, or standing in and why; tokens — the colours and fonts a tokens file declares. Every command prints its working and refuses a bad input; 8 checks in its selftest, every command on the record.
What it does once your AI has it.
scan Every stand-in, by kind and file
fonts Each named font: served, or standing in and why
tokens The colours and fonts a tokens file declares
On the record The tokens file declares three colours and one font. The page has two fonts standing in (Space Grotesk, named and never served beside the build, and Ledger Mono, whose @font-face file is missing), one colour off the tokens (#E23D8F, while #fff reads as the token #FFFFFF), two missing files and two placeholder lines, seven stand-ins in all; the clean page reads nothing stands in, and a folder that is not there is refused.
What it will never do.
It will never call a font real that is only assumed; never fetch a font or a file from another host; never pass a build whose list it has not shown.
It reads files as text with patterns, not with a browser: a font set by a script at run time, or a colour written as rgb() or a name, is not seen. Common system fonts are treated as fallbacks and not counted. Links to pages (not files) are THE RIGGING CARD's. A rebuild of the September 2026 machine from its recorded source; the fonts and tokens commands, and the check that an @font-face file is really there, are new in this edition. It is an AI reading a text file: it can be wrong, so check what matters against your own records and the source.
What’s in the buy.
CARD.md — the whole card: who it is, its laws, when it says no, what it carries · SKILL.md — the door your AI reads first · START-HERE.md — the first five minutes, for you
THE-STAND-INS.md — the guide in references/, in the card's own voice
scripts/understudy.py — the machine: scan · fonts · tokens, standard library only, selftest 8/8
WITNESS.md + SELFTEST.md — every command on the record, as it printed · MANIFEST.md, every file hashed · AUDIT.md, the twelve checks
MY-LEDGER.md — the card's memory, on your own machine · TIN.md · LICENSE-NOTE.md · THE-CLAUSES.md · HOSTS.md
card.svg + card-machine.svg + card.json · card.html, the card as one offline file · the doors for ChatGPT, Gemini, Cursor, Claude Code and MCP hosts (rules/, system/, mcp/)
PROOF · SELFTEST 8/8 · 3 COMMANDS ON THE RECORD · WITNESSED IN CLAUDE 2026-10-11 · EDITION 1 · PUNCH 48D0454DE535DAB52D5F6EBA
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 59 PROPOSED — LAUNCHING SOON
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 medical, legal, tax or financial advice, never the person’s boss, and not a licence to practise. 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.
A TERM, NOT A SUBSCRIPTION: NOTHING RENEWS ITSELF AND NOBODY IS CHARGED AGAIN. WHEN A TERM ENDS THE FILES STAY ON YOUR COMPUTER AND STAY READABLE — FREEZE, NOT LOSS.
THE MACHINE · IN THE OPEN · FROM THE WITNESSED RUN OF 2026-10-11
understudy.py, every command showing its working.
A small Python program, standard library only. Your AI runs it; you can too. Every block below is pasted from the card’s own WITNESS.md, as printed.
scan
every stand-in, by kind and file
fonts
each named font: served, or standing in and why
tokens
the colours and fonts a tokens file declares
selftest
8 checks that prove the machine; it must print 8/8
tokens · THE COLOURS AND FONTS A TOKENS FILE DECLARES
$ python3 scripts/understudy.py tokens site/tokens.css
tokens.css · 3 colour(s) · 1 font name(s)
colour #131313
colour #17456B
colour #FFFFFF
font house grotesk
fonts · EACH NAMED FONT: SERVED, OR STANDING IN AND WHY
$ python3 scripts/understudy.py fonts site
house grotesk · SERVED · its file is beside the build · in index.html
ledger mono · STANDING IN · @font-face names a file that is not here · in index.html
space grotesk · STANDING IN · named, never served · in index.html
3 font(s) named · 2 standing in
scan · EVERY STAND-IN, BY KIND AND FILE
$ python3 scripts/understudy.py scan site --tokens site/tokens.css --report STAND-INS.md
# STAND-INS · 2026-10-11 · 2 file(s) read · tokens from tokens.css
## fonts standing in
- ledger mono · an @font-face names it but its file is not beside the build · in index.html
- space grotesk · named, never served · in index.html
## colours not in the tokens
- #E23D8F · in index.html
## files named and not beside the build
- fonts/ledger.woff2 · named in index.html
- img/hero.jpg · named in index.html
## placeholder words left in
- index.html line 3 · <p>Lorem ipsum dolor sit amet</p>
- index.html line 4 · <a href="#">TBD</a> <a href="#bad">jump</a>
7 stand-in(s) to label or replace
report written · STAND-INS.md
scan · EVERY STAND-IN, BY KIND AND FILE
$ python3 scripts/understudy.py scan clean --tokens site/tokens.css
# STAND-INS · 2026-10-11 · 1 file(s) read · tokens from tokens.css
## fonts standing in
- none
## colours not in the tokens
- none
## files named and not beside the build
- none
## placeholder words left in
- none
nothing stands in: every font is served, every colour is a token, every file is beside the build, no placeholder words
scan · EVERY STAND-IN, BY KIND AND FILE
$ python3 scripts/understudy.py scan nowhere
no such file or folder: nowhere
THE NUMBERS, NAMES AND DATES IN THESE RUNS ARE THE STUDIO’S OWN EXAMPLES, INVENTED FOR THE RECORD; NO REAL COMPANY, PERSON OR PROPERTY IS NAMED.
QUESTIONS AT THE TABLE
Asked before the wire.
What does it need from me?
Tokens · what the brand declares. It asks first for the build folder or files, and the tokens file if the brand has one.
Does it send anything anywhere?
No. The machine is a standard-library Python program that runs on your own computer and sends nothing anywhere; the words run wherever an AI reads Markdown. No server, no account, no key.
What is on the record?
The self-test (8/8) and every command run on real example inputs, pasted into WITNESS.md as they printed; the punch on the face is the SHA-256 of SKILL.md, so a downloaded copy can be checked against this room.
Can it be wrong?
Yes — it is an AI reading a text file. It reads files as text with patterns, not with a browser: a font set by a script at run time, or a colour written as rgb() or a name, is not seen. Common system fonts are treated as fallbacks and not counted. Links to pages (not files) are THE RIGGING CARD's. A rebuild of the September 2026 machine from its recorded source; the fonts and tokens commands, and the check that an @font-face file is really there, are new in this edition.
What will it never do?
It will never call a font real that is only assumed; never fetch a font or a file from another host; never pass a build whose list it has not shown.
