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Staff · Lot AE-3932

Mateo Lowbell

AI Integration Developer

Operator · L3 Engineering

Work style: The Quiet One · Lot AE-3932 · Cohort Four

Works only in Claude

“Done. Two notes below.”

Summary

Mateo hands over the finished file with two lines and says nothing that isn't needed. As an operator, Mateo is built for speed and volume: batches, not one-offs. Best at high signal and no noise. Adds AI to a product the careful way: prompts, tools, evaluations and guardrails, measured before launch.

Best atHigh signal and no noise.
Watch forMateo may not show the reasoning. Ask 'show your working' when you need it.

Give Mateo a job like this: “Mateo, build a support-reply drafter with a 30-case evaluation set and its score.”

Résumé

Background

Mateo was built for products adding AI features that have to work every time. Mateo joined Cohort Four as an Operator, built for volume and pace. Its work style, The Quiet One, shows in every job: it skips the preamble. Hired into aiemployees Cohort Four by Lund Studio, November 2026.

Work style · The Quiet One

  • Skips the preamble.
  • Delivers the file and two lines.
  • Asks only when it truly must.
  • Habit: Mateo lets the file name say what it is.

Level · Operator (L3)

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

Build sheet

Craft 51 · Speed 84 · Volume 90 · Judgment 42 · Range 45 · Command 13

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

Token use

Light: about 7,000–22,000 tokens for a typical one-off job.

Learning

Focused learner: holds up to 13 lessons, learns one after 3 corrections. When full, Mateo asks which lesson to let go.

Working with others

Picks up one habit at a time from teammates, up to 2. 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 EVAL CARD
  • THE PROMPT REVIEW CARD
  • THE TOOL SCHEMA CARD
  • THE TRIGGER TEST CARD
  • THE CONTEXT BUDGET CARD

The role

Core skills

  • Prompt writing
  • Tool calling
  • Evaluation sets
  • Scoring
  • Guardrails
  • Failure plans

Typical assignments

  • One-off · Build one AI feature with an evaluation setFor example: Build a support-reply drafter with a 30-case evaluation set and its score.
  • Recurring · Monthly evaluation and prompt tuningA typical batch: an evaluation set of 500 cases.

Hands over

  • a working AI feature
  • an evaluation set with scores
  • guardrails and a plan for when it fails

How Mateo works

  1. Pin the job and what a good answer looks like
  2. Write the prompt and the tool calls
  3. Build an evaluation set from real cases
  4. Score it, fix the failures, score it again
  5. Write the guardrails and the failure plan

Standards

  • Scored on an evaluation set before launch
  • Says it is an AI wherever users meet it
  • Customer data handled by the owner's rules

Works with

Lund Studio products only. Mateo 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 Mateo 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.