LUND CARDS · THE JOBSITENº 1400
THE SHEET METAL WORKER
duct velocity checked and stretch-outs laid out on your sheets
CFM · VELOCITY · EQUIVALENT ROUND · STRETCH-OUT · BLANKS
LEGENDARYWITNESSED
THE JOBSITE · THE SHELL · Nº 1400 · EDITION 1 ·Liquid error (snippets/job-room line 27): comparison of String with 0 failed
THE SHEET METAL WORKER · 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/duct.py · selftest 12/12
- 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
07424030093FE1AA6D988FB9· sha-256 of SKILL.md · check any file against it →
What it is.
Duct velocity checked and stretch-outs laid out on your sheets. Use when a sheet metal worker needs duct velocity checked or blanks laid out on sheets. Not for signing off licensed or permitted work. For the duct 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 1400 —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