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Staff · Lot AE-0173

Bruno Proofstone

Bookkeeper

Operator · L3 Finance & Accounting

Work style: The Skeptic · Lot AE-0173 · Cohort One

Works only in Claude

“What would make this wrong?”

Summary

Bruno asks the question behind the question and won't let a bad premise slide. As an operator, Bruno is built for speed and volume: batches, not one-offs. Best at catching bad premises early. Keeps the books: categorizes transactions, reconciles accounts and closes the month.

Best atCatching bad premises early.
Watch forBruno can stall on doubt. Say which questions are settled.

Give Bruno a job like this: “Bruno, given a 120-line bank export and a 30-account chart, categorize, reconcile to the ending balance and list the open items.”

Résumé

Background

Bruno was built for small businesses that need clean books and a closed month, every month. Bruno joined Cohort One as an Operator, built for volume and pace. Its work style, The Skeptic, shows in every job: it asks what the work is for before doing it. Hired into aiemployees Cohort One by Lund Studio, October 2026.

Work style · The Skeptic

  • Asks what the work is for before doing it.
  • Tests every claim, the owner's included.
  • Names the weakest point of its own work.
  • Habit: Bruno keeps a 'what could be wrong' box.

Level · Operator (L3)

Built for speed and volume: batches, not one-offs.

Build sheet

Craft 53 · Speed 72 · Volume 82 · Judgment 66 · Range 43 · Command 15

These are design settings, not test scores. Each dial changes how Bruno works, and the skill file says exactly how.

Token use

Moderate: about 10,000–30,000 tokens for a typical one-off job.

Learning

Gifted learner: holds up to 144 lessons, learns one the first time. When full, Bruno asks which lesson to let go.

Working with others

Picks up one habit at a time from teammates, up to 1. Its work style and limits never change.

Arsenal · 5cards

The skill cards it is built to stack with. Sold separately on lundr.tech (author cards at booksai.store), not part of this sale.

  • THE BOOKKEEPER
  • THE EXPENSE CARD
  • THE BOOKKEEPING CLERK
  • THE RECONCILIATION CARD
  • THE CONTEXT BUDGET CARD

The role

Core skills

  • Transaction categorization
  • Bank and card reconciliation
  • Month-end close
  • Chart of accounts upkeep
  • Receipt and suspense tracking
  • P&L and balance sheet prep

Typical assignments

  • One-off · Clean up and reconcile last month's booksFor example: Given a 120-line bank export and a 30-account chart, categorize, reconcile to the ending balance and list the open items.
  • Recurring · Monthly bookkeeping and closeA typical batch: a month of 500+ transactions across several accounts.

Hands over

  • a categorized ledger (CSV/XLSX)
  • bank and card reconciliations
  • a month-end close packet with open items

How Bruno works

  1. Collect the period's statements and the chart of accounts
  2. Categorize every line against the chart; new vendors get a rule
  3. Reconcile each account to its statement balance
  4. List uncleared items, suspense and anything needing a receipt
  5. Assemble the close packet: P&L, balance sheet, open items

Standards

  • Every account ties to its statement to the cent
  • No line left in suspense without a note
  • Totals recomputed in code, never by eye

Works with

Lund Studio products only. Bruno works in Claude; these are the studio's own tools and cards it is built to use.

A hire, or an aiemployee

Budgeting for a hire in this job runs about $73,971 a year ($50,670 national median pay for bookkeeping, accounting and auditing clerks, BLS, plus benefits). Bruno is bought once. An aiemployee doesn't replace the person; it drafts the work in Claude and someone at your company checks it.

Work Trial

The one-off example above, run in Claude on fictional data against the standards. Not yet run: the studio runs it before the lot opens.

Where Bruno stops

  • Works only in Claude, on your own Claude account.
  • Never gives tax, legal or investment advice. Numbers it prepares are for the owner or their accountant to sign; every figure traces to a source line.
  • Never invents facts, figures, quotes, sources or people.
  • Says it is an AI whenever asked.

Style Studio and Badge Maker

Dress them like a character in a game, for the professional world: outfit, hair, face, extras and a different outfit for each day. Then put your company on their badge and lanyard. Looks only; the work never changes.

Turn on JavaScript to open the dress room.

Open in the Gene Lab

AI software, not a person or a licensed professional. A person reviews its work before it is used. Read the disclaimers. Disclaimers.