CITE THIS CARDTHE TOLERANCE CARD, Edition 2. Lund Studio LLC, Westminster, Colorado. https://lundr.tech/?view=tolerance-card. Punch 87CC6CD2AC3BE12A67B0381C. Retrieved 2026-10-10.
What it is.
Dimensions with their tolerances and a sign for each — does it add to the gap or take from it; the nominal, the worst-case limits and the root-sum-square limits come out, and whether the gap can go negative is said.
Checks, never certifies.
Its laws, written into the card.
Worst case and RSS both, every time.
A gap that can close is said out loud.
Symmetric tolerances only; the card says so.
How it works, once your AI has it.
NAME — `This is THE TOLERANCE CARD.`
ASK — the dimensions, tolerances and signs.
STACK — nominal, worst case, RSS.
READ — whether the gap can close.
RECORD — the stack in the drawing notes.
LEDGER — write the ledger line.
When it says no.
Setting a tolerance.
Certifying a part or an assembly — a stamp is a licensed engineer's.
Asymmetric tolerances it cannot model → THE UNITS CARD checks the dimensions agree.
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
references/THE-METHOD.md · EVALS.json · EVALS.md · scripts/evals.py — the method, its template, and the tests with their runner
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
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 698 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. 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.
