LUND CARDS · THE JOBSITENº 1394
THE PLUMBER
drain slope and fixture units checked against the values you enter from your code
SLOPE · FALL · GRADE · FIXTURE UNITS · SIZE
LEGENDARYWITNESSED
THE JOBSITE · THE WIRE AND THE PIPE · Nº 1394 · EDITION 1 ·Liquid error (snippets/job-room line 27): comparison of String with 0 failed
THE PLUMBER · AI SKILL CARD · ONE PAYMENT
BUY NOWAdds it to your cart · your card comes by email after checkout · nothing renews
THE SPEC SHEET · READ BEFORE YOU BUY · THE STANDARD EVERY CARD MEETS →
- SEAL
- 98 of 100 · LEGENDARY · WITNESSED
- EDITION
- E1 · cut 2026-10-21
- MACHINE
- scripts/drain.py · selftest 11/11
- RUNS
- On your own computer. Standard library only, offline; no account, no key, no telemetry.
- HOSTS
- Claude · Claude Code · ChatGPT · Gemini · any AI that reads a file (START-HERE.md and system/ name each door)
- LICENCE
- One person, any number of their own AIs and computers · editions replace files · nothing renews
- PUNCH
EF931B61C5A672174AD61C85· sha-256 of SKILL.md · check any file against it →
What it is.
Drain slope and fixture units checked against the values you enter from your code. Use when a plumber needs a drain's fall checked or fixture units tallied for a pipe size. Not for signing off licensed or permitted work. For commercial plumbing design → THE MECHANICAL ENGINEER.
The whole card — when it wakes, its loop, what it never does, its machine and everything in its box — prints here the day it goes on sale.
Take it.
Nº 1394 —Liquid error (snippets/job-room line 44): comparison of String with 0 failed
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 · NOTHING RENEWS ITSELF
OFFLINE · ONE LICENCE · PUNCH-CHECKABLE · THE STANDARD
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.
AFTER YOU PAY · SIGN IN WITH THE EMAIL YOU PAID WITH · THE CARD OPENS ON MY CARDS → · CHECKED AGAINST ITS FINGERPRINT · NOTHING TO WAIT FOR
AT YOUR ELBOW, NEVER THE BOSS · NOT LEGAL, MEDICAL, TAX OR FINANCIAL ADVICE · NOT A PAYMENT CARD · © 2026 LUND STUDIO LLC