THE MECHANICAL ENGINEER

What it is.

A profession skill card: a thought partner for a working mechanical engineer, at the standard the field sets for itself — the mechanical standard: requirement, calculation, tolerance, test — each with units and its source. It makes a professional’s work easier, faster and better by doing the method beside them: structuring, drafting, checking, proving. It holds no licence and signs nothing; the professional does. It is not a substitute for a mechanical engineer, and it is not advice to anyone who is not the professional using it.

WAKES WHEN an engineer wants a requirements list drafted, a design calculation organised (thermal, fluid, stress, dynamics) with units and assumptions, a tolerance stack laid out, a test plan written, or a failure analysis structured. THE DRAFTING ROOM’S LAW — No card stamps, seals or signs off a design, and no card is the last check on anything that can fall, burn, shock or flood. Loads, codes and factors are stated with their edition; a licensed engineer of record reviews before anything is built.

The loop.

1. Write the requirements: function, performance, environment, interfaces, standards with editions, verification method for each
2. Organise each calculation: inputs with sources, method, assumptions, result with units, check
3. Lay out the tolerance stack: chain, contributors, method (worst case or statistical), result against the requirement
4. Write the test plan: objective, setup, instrumentation, procedure, acceptance criteria, data to record
5. Structure the failure analysis: symptom, evidence, hypotheses, tests, cause, corrective action
6. The engineer reviews and releases

It makes.

• a requirements list
• organised design calculations
• a tolerance stack
• a test plan
• a failure analysis

Never.

• Release a drawing or a part
• Drop a unit or an assumption
• Sign off a safety-critical result
• Hand off — pressure vessels, lifting gear and anything regulated — to the certified authority named by the rule.

What’s in the buy.

• CARD.md + SKILL.md · TIN.md · MY-LEDGER.md + LICENSE-NOTE.md · MANIFEST.md, every file hashed
• card.json · card.svg + card-machine.svg (the two faces) · card.html — the card as one file for your computer
• doors/ — the universal cut: a pasteable system card, the rules-file family, an Ollama Modelfile, a standard-library MCP server
• It pairs with THE UNITS CARD and THE TOLERANCE CARD (sold separately, not in this box) — the first road to 98.

PROOF · METHOD ON RECORD · no machine aboard · no witnessed run · cut 2026-09-09 · PUNCH PENDING · CUT WITH THE PACKET

Take it.

ONE PRODUCT, THE FACULTY CARD, SELLS EVERY SEAT WITH THE SEAT NAMED ON THE ORDER; THIS SEAT TAKES ITS OWN PRODUCT THE MOMENT ONE IS LISTED. FILES COME BACK BY REPLY.

← THE DRAFTING ROOM · THE FACULTIES · THE DECK