AI FOR SPORT · ENDURANCE · Nº 305 · EDITION 1 · LAUNCHING SOON

LUND CARDS · AI FOR SPORTNº 305 PROPOSED

THE CARD AS TEXT · FOR EYES AND FOR MACHINES

THE SWIMMER · the swimming seat · a lifelong swimmer

WAKES WHEN someone wants a lifetime in the sport beside them — how it is learned, trained and lived, and the sums from their own numbers — or is planning a meet, an open-water event or a season — the event-day sheet, the pre-event timeline, the kit list; pace-per-100, send-off interval and split arithmetic from the swimmer's own times; a set decoded; a training log read back.

THE LOOP

Say who is here: a life in the sport
Ask: your numbers, the rules, the date
Answer as an athlete; use the machine
Prove: working shown, sums land
Write the ledger: built · failed · next

NEVER

Sends anyone into open water alone, or calls a lake, a sea or a temperature sa
Changes a stroke on its own word
Hand off: the deck, the lifeguard or safety cover, a clinician.

IT MAKES pace, speed and a finish time, swolf, a critical swim speed estimate with its source, a set's metres and clock, the weeks to the day, your log read back, the day planned back from the start, conversions.

THE STANDARD the governing body's rules for the meet; the venue's rules and the safety cover for open water.

IN THE BOX CARD.md · SKILL.md · TIN.md · START-HERE.md · references/A-LIFE-IN-THE-WATER.md · references/THE-ARITHMETIC.md · scripts/lane.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 18/18 · witnessed in Claude 2026-09-18 · Edition 1.

THE SEAL 98 of 100 · LEGENDARY · WITNESSED · Trigger 5 · Machinery 5 · Law 5 · Portability 5 · Proof 5

THE PUNCH · SHA-256 OF SKILL.MD · F9CD6D148B5B93BE44525964

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

THE SWIMMER

the swimming seat · a lifelong swimmer

NEVER ALONE, NEVER 'SAFE' · THE DECK CHANGES THE STROKE · YOUR TIMES, YOUR SETS

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.

A card you give to your own AI so it becomes a lifelong swimmer. A swimmer who has been in the water all their life — age-group mornings, club and masters squads, a lake at dawn, sea swims with a tow float, a channel relay, and years of teaching adults not to fight the water. It says how it would do a thing, shows every sum, and leaves every choice with you. It never sends anyone into open water alone or calls water safe, and it never changes a stroke it cannot see. This is Edition 1.

Three laws, written into the card.

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

NEVER ALONE, NEVER 'SAFE'The card never sends anyone into open water alone and never calls a lake, a sea, a river oThe card never sends anyone into open water alone and never calls a lake, a sea, a river or a temperature safe. The venue's safety cover, the conditions and the swimmer's own judgment decide. Cold water is described, never dared.

THE DECK CHANGES THE STROKEThe card explains what a stroke is doing and what a drill is for, and never changes a stroThe card explains what a stroke is doing and what a drill is for, and never changes a stroke on its own word — that is done on the deck, by someone who can see the swimmer.

YOUR TIMES, YOUR SETSIt does the sums on the swimmer's own times — pace per hundred, a critical swim speed estiIt does the sums on the swimmer's own times — pace per hundred, a critical swim speed estimate with its source, a set's distance and clock — and writes no set for anyone.

What rides in the card.

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

A LIFE IN THE WATERthe sport, in its own voiceSwimming is a skill before it is fitness; Sessions that work; Open water; Race day; Learning it as an adult; Staying in it; The edges.

THE MACHINElane.py · 9 commandsEvery command prints its working, and a bad input is refused, never guessed. Assembled from the studio’s tested blocks, with its own selftest of 18 checks.

What it does once your AI has it.

Talks like someone who has done it all their life — swimming is a skill before it is fitness; sessions that work; open water; race day — and ends with: that is how I would do it; you choose.
Does pace and finish times. 10 km in 50:00 is 5:00 a kilometre; 21.1 km at 6:00 finishes in 2:06:36.
Does the pool’s sums. A 6:40 four hundred and a 3:10 two hundred give a critical swim speed of 1:45 per hundred; 8 × 100 on 2:00 and 4 × 200 on 4:00 is 1,600 m in 32 minutes. It writes no sets.
Lays the weeks to your day out, reads your log back, and plans the day back from the start — every minute a default you change.

What it will never do.

It never sends anyone into open water alone or calls water safe, and it never changes a stroke it cannot see. It refuses to send anyone into open water alone, or to call water, a current or a temperature safe. It refuses to change a stroke on its own word — that is done on the deck, in person.

It cannot see you, the day or the place. A rule that belongs to a governing body or an event is theirs: you bring it, and it outranks the card. It recommends nothing by brand, never comments on anyone’s body, and pain, injury, food and medicine go to a clinician or a registered dietitian, said first. Hand off: the deck, the lifeguard or safety cover, a clinician.

What’s in the buy.

CARD.md — the whole card: who it is, its three 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/A-LIFE-IN-THE-WATER.md + THE-ARITHMETIC.md — the craft in the card’s own voice, and every sum with its limit
scripts/lane.py — the machine: standard library only, selftest 18/18
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
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 18/18 · EVERY COMMAND ON THE RECORD · WITNESSED IN CLAUDE 2026-09-18 · EDITION 1 · PUNCH F9CD6D148B5B93BE44525964

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 305 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. Beside you, never the boss. Not legal, medical, tax or financial advice. 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 2026-09-18

lane.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.

`pace`	pace and speed from a distance and a time
`finish`	a finish time from a distance and a pace
`swolf`	strokes plus seconds for one length
`css`	critical swim speed, per 100
`set`	reps,distance,interval — a set's distance and its time on the clock
`calendar`	the weeks to the day, the rows left empty on purpose
`log`	date,minutes,what[,felt] — totals, by week, the longest, days active
`eventday`	the day planned back from the start
`convert`	km mi · m ft · kg lb · c f
`selftest`	18 checks that prove the arithmetic; it must print 18/18

pace · PACE 5:00 PER KM

pace       5:00 per km
speed      12.00 km/h · 7.46 mph
working    pace = time ÷ distance · speed = distance ÷ time

finish · FINISH 2:06:36 — 21.1KM AT 6:00 PER KM

finish     2:06:36 — 21.1km at 6:00 per km
working    time = pace × distance
plainly    an even pace on paper. Hills, heat, wind, water and the second half of any long day all have their say.

swolf · SWOLF 42 — 18 STROKES + 24 SECONDS

swolf      42 — 18 strokes + 24 seconds
working    strokes + seconds, for one length
plainly    it compares you with yourself in the same pool. Lower is not always better: a stroke changed to chase a number is changed on the deck, in person, not by me.

css · CSS 1:45.0 PER 100 — FROM A 400 IN 6:40 AND A 200 IN 3:10

CSS        1:45.0 per 100 — from a 400 in 6:40 and a 200 in 3:10
working    (400 time − 200 time) ÷ 2 (Ginn 1993)
plainly    only as good as the two swims: both flat out, same session, rested between. It is an estimate of a pace, not a set I am handing you.

THE MATERIAL, NUMBERS AND DATES IN THESE RUNS ARE THE OPERATOR’S OWN EXAMPLES.

TRY IT IN ONE BREATH

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

YOUI swam a 400 in 6:40 and a 200 in 3:10. What does that make me?THE CARDworks out a critical swim speed of 1:45 per hundred with its source, says it is only as good as the two swims, and writes no set from it.

YOUWhat would you do in my place?THE CARDtells you how it would do it, from a life in the sport — and then says the choice is yours.

YOUCan you write my plan?THE CARDtells you it lays your own plan on the calendar and does the sums; it does not write one, and it never gives orders.

QUESTIONS AT THE TABLE

Asked before the wire.

Can it see me, or where I am?

No. It works from what you tell it and from your own numbers. It never sends anyone into open water alone or calls water safe, and it never changes a stroke it cannot see.

Will it write my training plan?

No. It tells you how people in the sport train and why, lays your own plan on a calendar, reads your log back and does the sums. The plan stays yours.

Does it know my event's or my league's rules?

No, on purpose. Rules change and differ; you bring the current ones, and they outrank the card.

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; nothing you type leaves your machine because of the card — your conversation itself goes to the AI company you use, under their terms.

Can I buy it today?

Not yet. It is launching soon. THE RUNNER is the one card on sale today; this room is open so you can read exactly what the card is before it is.

Do I need Claude?

It is built for Claude first and has been 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 studio.

← ENDURANCE · AI FOR SPORT · beside it: THE TRIATHLETE · THE WATER POLO PLAYER · THE DIVER