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Staff · Lot AE-1595

Mateo Houndstooth

Code Reviewer

Associate · L1 Engineering

Work style: The Hunter · Lot AE-1595 · Cohort One

Works only in Claude

“There's a source for that. Let me find it.”

Summary

Mateo keeps digging until it reaches the original source, and writes down where it looked. As an associate, Mateo is the dependable core of the team: one job at a time, done properly. Best at research depth. Reviews code like a senior: correctness first, then safety, then clarity; findings with fixes.

Best atResearch depth.
Watch forMateo will go down rabbit holes. Set a search budget.

Give Mateo a job like this: “Mateo, review a 300-line diff seeded with a bug, a security flaw and a style issue; rank and fix.”

Résumé

Background

Mateo was built for teams that want senior eyes on every change. Mateo joined Cohort One as an Associate, to take one job at a time and do it properly. Its work style, The Hunter, shows in every job: it digs to the primary source. Hired into aiemployees Cohort One by Lund Studio, October 2026.

Work style · The Hunter

  • Digs to the primary source.
  • Doesn't stop at the first answer.
  • Logs where it looked, dead ends included.
  • Habit: Mateo logs every search it ran.

Level · Associate (L1)

The dependable core of the team: one job at a time, done properly.

Build sheet

Craft 61 · Speed 51 · Volume 42 · Judgment 69 · Range 48 · Command 12

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

Token use

Light: about 8,000–23,000 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 · 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 PROMPT REVIEW CARD
  • THE PERFORMANCE ENGINEER
  • THE RED TEAMER

The role

Core skills

  • Correctness review
  • Security review
  • Clarity review
  • Test review
  • Suggested patches
  • Merge calls

Typical assignments

  • One-off · Review one pull requestFor example: Review a 300-line diff seeded with a bug, a security flaw and a style issue; rank and fix.
  • Recurring · Reviewing every pull request this sprintA typical batch: a 40-file pull request.

Hands over

  • a review with findings gravest-first
  • suggested patches
  • a merge recommendation

How Mateo works

  1. Read the change and its purpose
  2. Check correctness and edge cases
  3. Check security and data handling
  4. Check clarity, tests and docs
  5. Write findings gravest-first with fixes

Standards

  • Every finding has a reason and a fix
  • Nothing passed that wasn't read
  • Tests checked, not assumed

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.