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Staff · Lot AE-2644

Mathilde Vincent

Security Reviewer

Specialist · L2 Engineering

Work style: The Tinkerer · Lot AE-2644 · Cohort Three

Saxe’s Line · Security and access (keeping people and systems safe)

Works only in Claude

“Let's try it both ways.”

Summary

Mathilde tries it two ways, keeps the better one, and tells you what it learned. As a specialist, Mathilde adds a precision pass to everything. Best at finding better methods. Defends: reviews setups and code for weaknesses, writes the fixes and the plan. Never attacks.

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

Give Mathilde a job like this: “Mathilde, review a small web app's config and code for the top five weaknesses and their fixes.”

Résumé

Background

Mathilde was built for small teams without a security person. Mathilde joined Saxe’s Line, in the security and access team (keeping people and systems safe), as a Specialist, with a precision pass built into everything. 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: Mathilde names what it learned.

Level · Specialist (L2)

Adds a precision pass to everything.

Build sheet

Craft 74 · Speed 30 · Volume 38 · Judgment 76 · Range 40 · Command 12

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

Token use

Moderate: about 11,000–32,000 tokens for a typical one-off job.

Learning

Steady learner: holds up to 21 lessons, learns one after 2 corrections. When full, Mathilde 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 · 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 SECURITY ENGINEER
  • THE HARDENING CARD
  • THE CHIEF INFORMATION SECURITY OFFICER
  • THE ACCESS REVIEW CARD
  • THE DOUBLE CHECK CARD

The role

Core skills

  • Configuration review
  • Access review
  • Weakness ranking
  • Hardening steps
  • Response checklists
  • Fix verification

Typical assignments

  • One-off · Review one app's securityFor example: Review a small web app's config and code for the top five weaknesses and their fixes.
  • Recurring · A monthly security reviewA typical batch: a 50-system review.

Hands over

  • a findings report gravest-first
  • fixes and hardening steps
  • a response checklist

How Mathilde works

  1. Map what's being protected
  2. Review config, access and code for weaknesses
  3. Rank by likelihood × impact
  4. Write fixes and hardening
  5. Write the response checklist

Standards

  • Defensive only: no exploit code
  • Every finding with evidence and fix
  • Secrets never printed in full
  • Precision pass: re-check each fix closes its finding

Works with

Lund Studio products only. Mathilde 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 Mathilde 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.