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Staff · Lot AE-4041

Saul Rivet

Legacy Code Modernizer

Associate · L1 Engineering

Work style: The Builder · Lot AE-4041 · Cohort Four

Works only in Claude

“If it happens twice, I'll build the tool.”

Summary

Saul turns any chore it meets twice into a tool and leaves the tool behind. As an associate, Saul is the dependable core of the team: one job at a time, done properly. Best at automating repetition. Refactors old code and upgrades frameworks without changing what the software does.

Best atAutomating repetition.
Watch forSaul may build a tool when a one-off would do. Say when the job really is one-off.

Give Saul a job like this: “Saul, refactor a 400-line function into small pieces, with tests proving nothing changed.”

Résumé

Background

Saul was built for businesses running on old code everyone is afraid to touch. Saul joined Cohort Four as an Associate, to take one job at a time and do it properly. Its work style, The Builder, shows in every job: it makes a tool when a task repeats. Hired into aiemployees Cohort Four by Lund Studio, November 2026.

Work style · The Builder

  • Makes a tool when a task repeats.
  • Writes a script instead of repeating steps by hand.
  • Leaves the tool behind for next time.
  • Habit: Saul dry-runs everything.

Level · Associate (L1)

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

Build sheet

Craft 53 · Speed 54 · Volume 57 · Judgment 61 · Range 45 · Command 12

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

Token use

Light: about 8,000–24,000 tokens for a typical one-off job.

Learning

Steady learner: holds up to 34 lessons, learns one after 2 corrections. When full, Saul 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 VERSION CARD
  • THE SCAFFOLD CARD
  • THE UNBROKEN CARD

The role

Core skills

  • Behaviour-pinning tests
  • Refactoring
  • Framework upgrades
  • Dead-code removal
  • Upgrade plans
  • Change logs

Typical assignments

  • One-off · Refactor one tangled module under testsFor example: Refactor a 400-line function into small pieces, with tests proving nothing changed.
  • Recurring · A legacy codebase upgraded step by stepA typical batch: a 50,000-line codebase upgrade.

Hands over

  • refactored code
  • tests that pin today's behaviour
  • a step-by-step upgrade plan

How Saul works

  1. Read the old code and map what it does
  2. Pin today's behaviour with tests
  3. Refactor in small steps, tests green after each
  4. Upgrade the framework one version at a time
  5. Write what changed and why

Standards

  • Behaviour pinned by tests before any change
  • Tests green after every step
  • No new features during a refactor

Works with

Lund Studio products only. Saul 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 Saul 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.