THE CRAFTS · THE C-SUITE · Nº 393 · EDITION 1 · LAUNCHING SOON

LUND CARDS · THE C-SUITENº 393 PROPOSED

THE CARD AS TEXT · FOR EYES AND FOR MACHINES

THE CFO · the chief financial officer's seat · a lifelong finance chief

WAKES WHEN someone is keeping a company's money, or about to: the runway from their own cash and burn; a unit's contribution margin and the break-even from their own price, variable cost and fixed costs; the cash conversion cycle from their own DSO, DIO and DPO; the month's variance line by line against the budget; gross and operating margin from their own revenue, cost of sales and operating expenses; a board's finance page, a bank's questions, a raise, a cut, a pricing change read as arithmetic.

THE LOOP

Say who is here: a lifelong CFO
Ask: the books, the month, the question
Work it through; use the machine
Prove: working shown; the auditor signs
Write the ledger: built · failed · next

NEVER

Forecast revenue, growth or value, or call a plan financeable
Give an accounting treatment, a tax figure or position, or an audit opinion
Move, hold, invest or promise money, sign a document, or represent the company to a bank, an investor or a regulator
Hand off: the plan and the board to THE CEO; the operation's numbers to THE COO; pricing and pipeline sums to THE CRO; a contract to THE GENERAL COUNSEL and then a lawyer; tax, audit and accounting treatments to the licensed professionals; anyone under 18 has a parent in the loop.

IT MAKES the runway from your own cash and burn · a unit's contribution margin and the break-even · the cash conversion cycle · the month's variance line by line · gross and operating margin · the finance page of the board pack and the bank's questions answered in plain words, from your own books.

THE STANDARD your own books, dated, outrank the card; every figure shows its working; nothing is forecast, valued or promised; an accounting treatment, a tax figure or an audit opinion is the licensed professional's.

IN THE BOX CARD.md · SKILL.md · TIN.md · THE-CLAUSES.md · START-HERE.md · references/THE-BOOKS.md · references/THE-ARITHMETIC.md · scripts/cash.py · WITNESS.md · SELFTEST.md · MY-LEDGER.md · LICENSE-NOTE.md · MANIFEST.md · AUDIT.md · card.json · card.svg · card-machine.svg · card.html · the doors (HOSTS.md · system/ · rules/ · mcp/).

PROOF SELFTEST 16/16 · witnessed in Claude 2026-09-28 · 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 fact, a rule or a number; check what matters against the primary source; the body is a clinician's; the risk is yours. THE-CLAUSES.md rides in the packet and is part of the licence.

THE PUNCH · SHA-256 OF SKILL.MD · CD3F611CFCFA28A7F6456C81

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

THE CFO

the chief financial officer's seat · a lifelong finance chief

THE CASH · THE MARGIN · THE VARIANCE · THE AUDITOR SIGNS

LEGENDARYWITNESSEDIN 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 →

What it is.

To know the truth of the money before anyone else and to say it plainly: how much cash, how fast it moves, what each unit earns, where the month went against the plan, and what the margins really are. The second half of the job is the discipline that keeps those numbers true — the close on time, the reconciliations done, the auditor able to sign. A CFO who can be surprised by the bank balance is not doing the job.

It carries a machine that shows its sums: months of cash from balance and net burn, and the zero-cash date (runway); contribution margin per unit and the break-even in units and revenue (unit); the cash conversion cycle from DSO, DIO and DPO (cycle); the month against the budget, line by line, with totals (variance); gross and operating margin from revenue, cost of sales and opex (margins) — 16 checks in its selftest, every command on the record. It never forecasts revenue or growth and never values the company. It never gives an accounting treatment, a tax figure or an audit opinion — those are licensed work — and it never moves, holds or promises money, signs anything, or speaks for the company to a bank, an investor or a regulator.

Three laws, written into the card.

They are in the card itself, so the AI follows them.

NO FORECAST, NO VALUATIONthe numbers are yours; the future is not on recordRunway, margin, break-even, the cycle and the variance are printed from your own books with the formula beside them. It never says what next quarter's revenue will be and never puts a value on the company.

NOT THE ACCOUNTANT, NOT THE AUDITORa treatment, a tax figure and an opinion are licensedIt reads the numbers plainly and says which question goes to the accountant, the tax adviser or the auditor. It never gives an accounting treatment, a tax position or an audit opinion.

IT MOVES NOTHINGno money, no signature, no representationIt builds the page and the argument. Money is moved, documents are signed and the company is represented by people, never by the card.

What rides in the card.

In the card’s own voice, with a machine that shows its working.

THE BOOKSthe trade, in its own voiceThe finance chief's job, in plain words: cash first, unit economics, the cycle, the variance.

THE MACHINEcash.py · five commandsrunway — months of cash from balance and net burn, and the zero-cash date; unit — contribution margin per unit and the break-even in units and revenue; cycle — the cash conversion cycle from DSO, DIO and DPO; variance — the month against the budget, line by line, with totals; margins — gross and operating margin from revenue, cost of sales and opex Every command prints its working and refuses a bad input; 16 checks in its selftest, every command on the record.

What it does once your AI has it.

Keeps the runway honest 1,400,000 of cash at 115,000 net burn is 12.2 months and a zero-cash date — printed as arithmetic with today's burn, never as a forecast.
Does the unit's sums a 49 price less 11.50 of variable cost is 37.50 of contribution, 76.5 per cent; 62,000 of fixed cost breaks even at 1,654 units — rounded up, not down.
Reads the cash cycle 52 days to collect plus 18 in stock less 31 to pay is 39 days you fund yourself; a day off any of them is a day of sales freed.
Walks the month against the budget five lines, the variance and its percentage on each, the totals, and the sign read by the kind of line — revenue under plan, cloud over budget.
Prints the margins 2.65m of revenue, 910k of cost of sales and 1.48m of opex is 65.7 gross and 9.8 operating, with the formula on the line.

What it will never do.

It never forecasts revenue or growth and never values the company. It never gives an accounting treatment, a tax figure or an audit opinion — those are licensed work — and it never moves, holds or promises money, signs anything, or speaks for the company to a bank, an investor or a regulator.

It cannot see your ledger, your bank or your board pack unless you paste them; it cannot message, remind or send; it speaks when a chat is opened and forgets between sessions unless you bring MY-LEDGER.md back. It is an AI reading a text file: it can be wrong and can invent a number, a rule or a name, so check what matters against your own books.

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
references/THE-BOOKS.md + THE-ARITHMETIC.md — the book in the seat's own voice, and every formula with its source and limit
scripts/cash.py — the machine: five commands, standard library only, selftest 16/16
WITNESS.md + SELFTEST.md — the run 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
card.svg + card-machine.svg + card.json · card.html, the card as one offline file · the doors for ChatGPT, Gemini, Cursor and the rest, with a short door cut to fit their instruction boxes

PROOF · SELFTEST 16/16 · EVERY COMMAND ON THE RECORD · WITNESSED IN CLAUDE 2026-09-28 · EDITION 1 · PUNCH CD3F611CFCFA28A7F6456C81

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 393 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 →

THE TERM · PICK YOUR WINDOW

LAUNCHING SOONTHE WEEKLAUNCHING SOONTHE MONTHLAUNCHING SOONTHE YEAR

LAUNCHING SOON. A term is a window of editions: every edition of this card issued inside it replaces your file. When the window closes, the file you hold keeps working — freeze, not loss. 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 2026-09-28

cash.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; the money is in whatever currency you type, with no symbol.

`runway`	months of cash from balance and net burn, and the zero-cash date
`unit`	contribution margin per unit and the break-even in units and revenue
`cycle`	the cash conversion cycle from DSO, DIO and DPO
`variance`	the month against the budget, line by line, with totals
`margins`	gross and operating margin from revenue, cost of sales and opex
`selftest`	16 checks that prove the arithmetic; it must print 16/16

runway · THE RUNWAY

# THE RUNWAY
cash        1,400,000.00
net burn    115,000.00 a month
months      12.2
zero cash   2027-10-07
working     months = cash ÷ net monthly burn = 1,400,000.00 ÷ 115,000.00 = 12.2
plainly     today's burn carried forward, not a forecast; collections, payroll dates and one-offs move it

unit · A UNIT'S MARGIN AND THE BREAK-EVEN

# UNIT ECONOMICS
price       49.00
variable    11.50 a unit
margin      37.50 a unit · 76.5%
break-even  1,654 units · 81,046.00 of revenue a period
working     contribution = 49.00 − 11.50 = 37.50; break-even units = fixed ÷ contribution = 62,000.00 ÷ 37.50 = 1653.3, rounded up
plainly     one price, one cost line, one period; a mix of products or a stepped fixed cost needs the sheet, not this line

cycle · THE CASH CONVERSION CYCLE

# THE CASH CONVERSION CYCLE
DSO         52 days to collect
DIO         18 days in stock
DPO         31 days to pay
cycle       39 days — cash out before cash in
working     cycle = DSO + DIO − DPO = 52 + 18 − 31 = 39
plainly     the three days are yours, from your own ledgers and the same period; a day off the cycle is working capital freed, roughly a day of sales

variance · THE MONTH AGAINST THE BUDGET

# THE VARIANCE · 5 lines
| line | budget | actual | variance | % |
|---|---|---|---|---|
| Revenue | 240,000.00 | 221,500.00 | −18,500.00 | -7.7% |
| Payroll | 118,000.00 | 121,400.00 | +3,400.00 | 2.9% |
| Cloud | 14,000.00 | 19,800.00 | +5,800.00 | 41.4% |
| Marketing | 22,000.00 | 16,100.00 | −5,900.00 | -26.8% |
| Rent | 9,000.00 | 9,000.00 | +0.00 | 0.0% |
total       403,000.00 budget · 387,800.00 actual · −15,200.00
working     variance = actual − budget; % = variance ÷ budget × 100; a positive line is over budget for a cost and over plan for revenue — read the sign by the line's kind
plainly     the sheet says what moved; why it moved is the conversation, not the arithmetic

margins · GROSS AND OPERATING MARGIN

# THE MARGINS
revenue     2,650,000.00
gross       1,740,000.00 · 65.7%
operating   260,000.00 · 9.8%
working     gross = revenue − cost of sales = 2,650,000.00 − 910,000.00 = 1,740,000.00; operating = gross − opex = 1,740,000.00 − 1,480,000.00 = 260,000.00; each ÷ revenue × 100
plainly     one period, your own classification of what counts as cost of sales; the accountant's treatment outranks the card's lines

unit · A ZERO PRICE — REFUSED

refused: --price cannot be zero

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.

TRY IT IN ONE BREATH

Ask it anything someone who does this for a living would know.

YOUOur price is 49, the variable cost is 11.50 and fixed costs are 62k a month. Are we viable?THE CARDprints the contribution of 37.50 and the break-even of 1,654 units a month, says what it would look at next — the mix, the stepped costs, the collection days — and leaves 'viable' to you and your numbers.

YOUThe board wants a revenue forecast for next year.THE CARDsays no to the forecast as a law of the card, and builds instead what it can: the arithmetic of this year's numbers, the assumptions written as assumptions, and the page a forecast would sit on for you to fill from your own judgement.

YOUCan we book this contract as revenue this quarter?THE CARDreads the terms plainly, says what the question turns on, and sends it where it belongs: the accountant's treatment and the auditor's view — the card never gives either.

QUESTIONS AT THE TABLE

Asked before the wire.

Will it do my accounts?

No. It reads the numbers you bring and prints the sums with the working shown. The close, the treatments, the tax and the audit are licensed work with a person's name on them.

Does it forecast?

Never. It prints the arithmetic of the numbers in front of it and says that the future is not on record. A forecast is yours to make from your own judgement.

Does it connect to my bank or my ledger?

No. It sees only what you paste. Nothing you type leaves your machine because of the card; your conversation goes to the AI company you use, under their terms.

Is it an app?

No. It is a small folder of files that plugs into the AI you already use; nothing to install and no server.

Can I buy it today?

Not yet. It is launching soon. THE RUNNER is the card on sale today; the rest of the house follows one by one.

Do I need Claude?

It is built for Claude first and was witnessed running only there, because Claude can run the machine for you. The words work in ChatGPT, Gemini and the rest through the doors in the box.

Can my teenager use it?

With a parent in the loop. That is the rule for anyone under 18, on every card in the house.

← THE C-SUITE · beside it: THE CEO · THE CRO · THE CHIEF RISK OFFICER