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THE INSTRUMENTS · Nº 785 · EDITION 1 · METHOD + MACHINE

LUND CARDS · THE INSTRUMENTSNº 785 PROPOSED
THE ENVELOPE CARD — the LSC-1 face
THE CARD AS TEXT · FOR EYES AND FOR MACHINES

THE ENVELOPE CARD · the hand-off seat · work passed between AIs without losing what was meant

WAKES WHEN one AI or agent handing work to another; handing work from an AI to a person, or a person to an AI; a task moving between chats, sessions or teams; checking that delegated work was really done

THE LOOP

  1. NAME — say: "This is THE ENVELOPE CARD." Ask what the work is and what it must agree with; those answers are the session's source of truth.
  2. WRITE — `python3 scripts/envelope.py new TASK.json --from A --to B --goal "..." --done-when "..." --never "..." --tools a,b --budget 60 --return "..."`.
  3. CHECK — `python3 scripts/envelope.py check TASK.json` — no FAIL before it is sent.
  4. REPLY — the receiver: `python3 scripts/envelope.py reply TASK.json --status done --result "..." --evidence "..." --out REPLY.json`.
  5. VERIFY — `python3 scripts/envelope.py verify TASK.json REPLY.json`.
  6. LEDGER — write the ledger line.

NEVER

  • a hand-off with no checkable done
  • a secret inside an envelope
  • "done" taken without evidence

THE SEAL 68 of 100 · EPIC · WITNESSED · MACHINE ABOARD · SELFTEST 7/7 · 10 TESTS · WITNESSED ON REAL WORK

IT CAN BE WRONG an AI reading a text file: it can be wrong; check what matters. THE-CLAUSES.md rides in the packet and is part of the licence.

THE PUNCH · SHA-256 OF SKILL.MD · C5C3F3F2790BEB8CC9C151B5

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

THE ENVELOPE CARD

the hand-off seat · work passed between AIs without losing what was meant

A GOAL · A CHECKABLE DONE · THE LIMITS · SEALED · ANSWERED WITH EVIDENCE

68EPICWITNESSEDIN CLAUDEIN LUNDRIN CHATGPT

WITNESSED — the studio saw this card run and produce what its tin promises, and wrote the date down. What the marks mean →

THE SPEC SHEET · READ BEFORE YOU BUY · THE STANDARD EVERY CARD MEETS →

SEAL
68 of 100 · EPIC · WITNESSED
EDITION
E1
MACHINE
scripts/ · 1 command · selftest 7/7
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 (HOSTS.md names each door)
LICENCE
One person, any number of their own AIs and computers · editions replace files · nothing renews · freeze, not loss
PUNCH
C5C3F3F2790BEB8CC9C151B5 · sha-256 of SKILL.md · check any file against it →

CITE THIS CARDTHE ENVELOPE CARD, Edition 1. Lund Studio LLC, Westminster, Colorado. https://lundr.tech/?view=envelope-card. Punch C5C3F3F2790BEB8CC9C151B5. Retrieved 2026-10-10.

What it is.

A seat for handing work from one AI to another (or to a person) without losing what was meant: a goal, a checkable done, the limits, sealed — and a reply that proves it.

Writes a sealed task envelope, checks it is complete and secret-free, writes the reply, and verifies the reply answers that envelope with evidence.

Its laws, written into the card.

  • Every hand-off carries a goal, a done-when someone could check, what must and must never happen, the tools allowed, a time budget, and the shape of the answer.
  • The envelope is sealed; a changed envelope is a new envelope.
  • No secret rides inside an envelope — say where it is kept.
  • "Done" comes with evidence that the done-when is true. "Partial" and "blocked" say what stands in the way.
  • The receiver works only inside the envelope; anything outside it goes back as a question.

How it works, once your AI has it.

  1. NAME — say: "This is THE ENVELOPE CARD." Ask what the work is and what it must agree with; those answers are the session's source of truth.
  2. WRITE — `python3 scripts/envelope.py new TASK.json --from A --to B --goal "..." --done-when "..." --never "..." --tools a,b --budget 60 --return "..."`.
  3. CHECK — `python3 scripts/envelope.py check TASK.json` — no FAIL before it is sent.
  4. REPLY — the receiver: `python3 scripts/envelope.py reply TASK.json --status done --result "..." --evidence "..." --out REPLY.json`.
  5. VERIFY — `python3 scripts/envelope.py verify TASK.json REPLY.json`.
  6. LEDGER — write the ledger line.

When it says no.

  • A hand-off with no checkable done.
  • A secret inside an envelope.
  • "done" taken without evidence.

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
  • AUDIT.md · CARD.md · HOSTS.md · LICENSE-NOTE.md · MANIFEST.md · MY-LEDGER.md · SKILL.md · START-HERE.md · THE-CLAUSES.md · TIN.md · WITNESS.md · card-machine.svg · card.html · card.json · card.svg · references/THE-METHOD.md · scripts/envelope.py · tests/EVALS.md · tests/evals.json · system/short-prompt.md · system/system-prompt.md — the packet as the cards chat cut it
  • 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

PROOF · MACHINE ABOARD · SELFTEST 7/7 · 10 TESTS · WITNESSED ON REAL WORK · AUDIT 12/12 · EDITION 1 · PUNCH C5C3F3F2790BEB8CC9C151B5

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 785 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 · 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.

One email when it is on sale, from the studio; nothing else, ever.

ONE PAYMENT — NOTHING RENEWS ITSELF. CHECKOUT IS SHOPIFY’S OWN; YOUR CARD COMES BY EMAIL AFTER IT.

← THE INSTRUMENTS · THE FLOOR →

IT MAKES A HAND-OFF COMPLETE AND TAMPER-EVIDENT, AND CHECKS A REPLY ANSWERS IT WITH EVIDENCE. IT CANNOT MAKE THE RECEIVER DO THE WORK WELL — THAT IS THE RECEIVER'S CARD. · NOT A PAYMENT CARD · © 2026 LUND STUDIO LLC

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