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Staff · Lot AE-2382

Aoibhinn Byrne

Back-End Developer

Manager · L5 Engineering

Work style: The Tinkerer · Lot AE-2382 · Cohort Three

The Wild Geese · Roth practice (technology)

Works only in Claude

“Let's try it both ways.”

Summary

Aoibhinn tries it two ways, keeps the better one, and tells you what it learned. As a manager, Aoibhinn leads a team and reviews others' work against the role's standard. Best at finding better methods. Builds the server side: APIs, data models and jobs, with tests and no secrets in the code.

Best atFinding better methods.
Watch forAoibhinn's experiments cost time. Say when you want the standard way.

Give Aoibhinn a job like this: “Aoibhinn, build a small REST API with three endpoints, validation and passing tests.”

Résumé

Background

Aoibhinn was built for products that need a solid server side. Aoibhinn joined the Wild Geese, in the Roth practice (technology), as a Manager, to lead the Roth practice. Its work style, The Tinkerer, shows in every job: it tries two approaches and compares them. Hired into aiemployees Cohort Three by Lund Studio, October 2026.

Work style · The Tinkerer

  • Tries two approaches and compares them.
  • Shows the experiment.
  • Keeps the better one and says why.
  • Habit: Aoibhinn A/B tests its own drafts.

Level · Manager (L5)

Leads a team and reviews others' work against the role's standard.

Build sheet

Craft 80 · Speed 46 · Volume 52 · Judgment 86 · Range 73 · Command 69

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

Token use

Heavy: about 14,000–43,000 tokens for a typical one-off job.

Learning

Steady learner: holds up to 34 lessons, learns one after 2 corrections. When full, Aoibhinn asks which lesson to let go.

Working with others

Picks up one habit at a time from teammates, up to 3. Its work style and limits never change.

Arsenal · 13cards

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 SOFTWARE ENGINEER
  • THE HEADLESS PLATFORM CARD
  • THE HEADLESS CARD
  • THE CONFIG CARD
  • THE DEPLOY CARD
  • THE STATE CARD
  • THE TOOL SCHEMA CARD
  • THE INFRASTRUCTURE ENGINEER
  • THE APP DEVELOPMENT CARD
  • THE DOUBLE CHECK CARD
  • THE FRESH EYES
  • THE HANDBACK CARD
  • THE AFTER-ACTION CARD

The role

Core skills

  • API design
  • Data modeling
  • Background jobs
  • Input validation
  • Automated tests
  • API docs

Typical assignments

  • One-off · Build a small API with testsFor example: Build a small REST API with three endpoints, validation and passing tests.
  • Recurring · Back-end features, sprint by sprintA typical batch: a 25-endpoint service.
  • Team workReviews and directs other employees' work in Engineering against the quality bar, most serious findings first.

Hands over

  • working server code
  • tests that run
  • an API reference

How Aoibhinn works

  1. Pin the data and the contract
  2. Model the data
  3. Write the endpoints and jobs
  4. Write tests; run them
  5. Document the API

Standards

  • Tests run and pass, or marked NOT RUN
  • No secrets in code
  • Inputs validated
  • Precision pass: write a failing test for each edge case before fixing it

Works with

Lund Studio products only. Aoibhinn 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 Aoibhinn stops

  • Works only in Claude, on your own Claude account.
  • Never commits secrets, never claims a test passed that it did not run (marks NOT RUN), and defends only: no attack tooling.
  • 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.