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LUND CARDS · THE INSTRUMENTS

LUND CARDS · THE INSTRUMENTSNº 068 · PROPOSED
THE TRIAL BALANCE CARD — the LSC-1 face, front
THE CARD AS TEXT · FOR EYES AND FOR MACHINES

THE TRIAL BALANCE CARD · debits equal credits, or they do not

WAKES WHEN a journal must be proven balanced before closing

THE LOOP

  1. Name the card; ask for the journal: entry, date, account, debit, credit
  2. Run `trial_balance.py run journal.csv -o TB.md`
  3. Read the unbalanced entries by id; fix them at the source
  4. Run again until IN BALANCE
  5. Hand TB.md to the accountant with the journal

NEVER

  • Refuse tax, legal or financial advice; hand off to a professional — FUNANCE keeps the books, this card proves them
  • Refuse to move an entry to make the books balance
  • Refuse to round; the cent is the unit
  • Refuse to invent proof, prices, quotes or numbers

IN THE BOX

PROOF

THE PUNCH · SHA-256 OF SKILL.MD · 6D00C010B748C73E6994B5CA

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

THE TRIAL BALANCE CARD

debits equal credits, or they do not

LEDGERS · TRIAL BALANCE ABOARD · SELFTEST

98LEGENDARYWITNESSEDIN 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 →

What it is.

A journal goes in; the per-account totals and the trial balance come out, every entry that does not balance is named by its id, and the whole is either in balance to the cent or refused. The card carries trial_balance.py, the machine, with a selftest that builds its own fixture, and audit.py, the packet’s own gate.

A balanced trial balance can still be wrong in every classification; the card cannot see that. Multi-currency journals are not converted. The sheet’s columns must be named debit and credit.

What’s in the buy.

  • scripts/trial_balance.py — the machine (run)
  • scripts/audit.py — the packet’s own gate
  • CARD.md · SKILL.md · TIN · LICENCE + LEDGER · MANIFEST, every file hashed · the two faces, card.json, card.html

PROOF · Trigger 5 · Machinery 5 · Law 5 · Portability 5 · Proof 5 — 25 of 25 → 98 of 100 · WITNESSED. · CUT 2026-09-08 · PUNCH 6D00C010B748C73E6994B5CA

ON EVERY DOOR · A CARD FOR YOUR AI, A FILE FOR YOUR COMPUTER

This card is an Agent Skill on the open standard: the same folder loads unmodified in Claude, ChatGPT and Codex, Copilot and VS Code, Cursor, Gemini CLI, Goose, OpenCode and the rest of the showcase. Its words are Markdown, so any chat with an instructions box holds them, any local model runs them offline, and any MCP client can load them — THE UNIVERSAL CUT: a pasteable system card, the rules-file family, an Ollama Modelfile, an MCP server, all cut from this card’s own SKILL.md by THE CARD FORGE. The universal cut is in this card’s box. And card.html — the card as one file for your computer: both faces, the tin, the words, every door; offline, in any browser. The machines aboard run wherever the host can run Python; the words run everywhere. The host marks →

Take it.

Nº 068 · PROPOSED —LAUNCHING SOON

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 →

LAUNCHING SOON

THE TERM LADDER · PICK YOUR WINDOW

LAUNCHING SOONTHE WEEKLAUNCHING SOONTHE MONTHLAUNCHING SOONTHE YEAR

A term is a window of editions: every edition of this card issued inside it replaces your file. When the window closes, the file you hold keeps working — freeze, not loss. Nothing auto-renews; come back and take another term when you want the next editions.

LAUNCHING SOON.

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