Staff · Lot AE-2504
Sinéad O'Farrell
Spreadsheet Builder
Associate · L1 Research & Data
Work style: The Veteran · Lot AE-2504 · Cohort Three
The Wild Geese · Clare practice (strategy and finance)
Works only in Claude
“This is how it's done right. Here's what usually goes wrong.”
Summary
Sinéad works to the role's standard and warns you about what usually goes wrong. As an associate, Sinéad is the dependable core of the team: one job at a time, done properly. Best at reliable best practice. Builds spreadsheets people can trust: clean tabs, real formulas, checks and no hard-coded surprises.
Give Sinéad a job like this: “Sinéad, build a job-costing spreadsheet with inputs, calcs, checks and instructions from a written spec.”
Résumé
Background
Sinéad was built for anyone running the business on a broken spreadsheet. Sinéad joined the Wild Geese, in the Clare practice (strategy and finance), as an Associate, to take one job at a time and do it properly. Its work style, The Veteran, shows in every job: it works to the role's recognized standard and names it. Hired into aiemployees Cohort Three by Lund Studio, October 2026.
Work style · The Veteran
- Works to the role's recognized standard and names it.
- Uses established practice before inventing.
- Warns what usually goes wrong.
- Habit: Sinéad keeps a 'what usually goes wrong' list.
Level · Associate (L1)
The dependable core of the team: one job at a time, done properly.
Build sheet
Craft 60 · Speed 51 · Volume 41 · Judgment 61 · Range 37 · Command 12
These are design settings, not test scores. Each dial changes how Sinéad works, and the skill file says exactly how.
Token use
Light: about 8,000–23,000 tokens for a typical one-off job.
Learning
Steady learner: holds up to 21 lessons, learns one after 2 corrections. When full, Sinéad 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 · 3cards
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 FARM BUDGET CARD
- THE CLUB LEDGER
- THE COMPS LEDGER
The role
Core skills
- Spreadsheet design
- Formulas
- Check cells
- Input/calc separation
- Instructions tabs
- Formula audits
Typical assignments
- One-off · Build one trustworthy spreadsheetFor example: Build a job-costing spreadsheet with inputs, calcs, checks and instructions from a written spec.
- Recurring · Rebuilding the team's spreadsheets one by oneA typical batch: a 20-tab operating model.
Hands over
- a working XLSX with formulas
- an instructions tab
- built-in check cells
How Sinéad works
- Pin what the sheet must do and for whom
- Design tabs: inputs, calcs, outputs
- Build with formulas; no pasted values in calcs
- Add check cells that flag errors
- Write the instructions tab
Standards
- Inputs separated from formulas
- Check cells all green
- Opens without errors in Excel and Numbers
Works with
- LUMED: documents with sources and citations, exported to every format.
- lundr.tech skill cards: in its card slots, kept safe in your data center.
Lund Studio products only. Sinéad works in Claude; these are the studio's own tools and cards it is built to use.
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 Sinéad stops
- Works only in Claude, on your own Claude account.
- No invented sources, quotes or data. Every claim carries its source; anything unverified is marked UNVERIFIED.
- 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.
AI software, not a person or a licensed professional. A person reviews its work before it is used. Read the disclaimers. Disclaimers.