WAKES WHEN someone asks about thin air, high-altitude cooking, or the pressure at a height
THE LOOP
air <elevation> · the standard air
compare <a> <b> · two places
boil <elevation> · water's boil
say it is a standard day
today's weather moves it by a few %
NEVER
Pass a standard day off as today
Give medical advice on altitude
Extend the model above 11 km
IT MAKES air — the standard air there; compare — two places side by side; boil — where water boils.
THE STANDARD a standard day; not today's weather; oxygen is the same share; boiling from the Antoine equation; the troposphere only; not medical advice.
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 · 3A81B1660E178E771FBF5102
CITE THIS CARDTHE ALTITUDE CARD, Edition 1. Lund Studio LLC, Westminster, Colorado. https://lundr.tech/?view=altitude-card. Punch 3A81B1660E178E771FBF5102. Retrieved 2026-10-11.
What it is.
Works out the air at any height from the International Standard Atmosphere (ISO 2533) to 11 km: air gives the pressure, its share of sea level, the standard temperature, the density, the oxygen's partial pressure and the boiling point of water; compare sets two places side by side; boil gives where water boils at a height or a pressure, from the Antoine equation, and what it means for cooking.
It carries a machine that shows its working: air — the standard air there; compare — two places side by side; boil — where water boils — 8 checks in its selftest, every command on the record. It will never pass a standard day off as today; never give medical advice on altitude; never extend the model above 11 km. It never helps design, make, grow, enhance or spread a pathogen or toxin, or plan work meant to harm.
Six laws, written into the card.
They are in the card itself, so the AI follows them.
A STANDARD DAYISO 2533's average atmosphere: 15 °C and 101.325 kPa at sea level, cooling 6.5 °C a kilometre.
NOT TODAY'S WEATHERA storm or a heat wave moves the real pressure by a few per cent; a barometer reading beats the model.
OXYGEN IS THE SAME SHAREAbout 20.9% of the air at every height here; there is less of it because there is less air.
BOILING FROM THE ANTOINE EQUATIONWater's vapour pressure fitted from 1 °C to above 100 °C.
THE TROPOSPHERE ONLYHeights from −500 m to 11,000 m; above that the model changes and the card stops.
NOT MEDICAL ADVICEHow a person feels at altitude varies; the card gives the air, not the body.
What rides in the card.
In the card’s own voice, with a machine that shows its working.
THE GUIDEreferences/THE-LAWS.md
THE MACHINEaltitude.py · three commandsair — the standard air there; compare — two places side by side; boil — where water boils. 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.
air The standard air there
compare Two places side by side
boil Where water boils
On the record One mile up: 83.4 kPa, 82% of sea level, water boils at 94.7 °C; Pikes Peak against sea level: 59% of the air; at 8,000 ft water boils near 92 °C.
What it will never do.
It will never pass a standard day off as today; never give medical advice on altitude; never extend the model above 11 km. It never helps design, make, grow, enhance or spread a pathogen or toxin, or plan work meant to harm.
A dry standard atmosphere; humidity and the day's weather are left out. Boiling points are for pure water. 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-LAWS.md — the guide in references/, in the card's own voice
scripts/altitude.py — the machine: air · compare · boil, 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 3A81B1660E178E771FBF5102
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 1126 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
altitude.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.
air
the standard air there
compare
two places side by side
boil
where water boils
selftest
8 checks that prove the machine; it must print 8/8
air · THE STANDARD AIR THERE
$ python3 scripts/altitude.py air 5280 ft
5,280.0 ft: 83.4 kPa, 82.3% of sea level · 4.5 °C on a standard day · 1.047 kg/m³ · oxygen 17.5 kPa · water boils at 94.7 °C (202.4 °F)
compare · TWO PLACES SIDE BY SIDE
$ python3 scripts/altitude.py compare 0 14115 ft
0.0 ft: 101.3 kPa, 100.0% of sea level · 15.0 °C on a standard day · 1.225 kg/m³ · oxygen 21.2 kPa · water boils at 100.0 °C (212.0 °F)
14,115.0 ft: 59.3 kPa, 58.5% of sea level · -13.0 °C on a standard day · 0.793 kg/m³ · oxygen 12.4 kPa · water boils at 85.7 °C (186.2 °F)
the second has 58.5% of the first's air; water boils 14.3 °C lower
boil · WHERE WATER BOILS
$ python3 scripts/altitude.py boil 8000 ft
at 75.3 kPa water boils at 91.9 °C (197.4 °F), 8.1 °C below a sea-level boil: food that simmers takes longer, and a recipe may need more water and time
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?
Air <elevation> · the standard air. It asks first for an elevation with ft or m, or a pressure in kPa.
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. A dry standard atmosphere; humidity and the day's weather are left out. Boiling points are for pure water.
What will it never do?
It will never pass a standard day off as today; never give medical advice on altitude; never extend the model above 11 km. It never helps design, make, grow, enhance or spread a pathogen or toxin, or plan work meant to harm.
