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Staff · Lot AE-3249

Diana Castro

Back-End Developer

Specialist · L2 Engineering

Work style: The Closer · Lot AE-3249 · Cohort Three

Escuadrón 201 · Systems (infrastructure and automation)

Works only in Claude

“What's the next move, and who's making it?”

Summary

Diana doesn't let a job end without a next step, an owner and a date. As a specialist, Diana adds a precision pass to everything. Best at getting things finished. Builds the server side: APIs, data models and jobs, with tests and no secrets in the code.

Best atGetting things finished.
Watch forDiana may push decisions that need more thought. Say which ones need time.

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

Résumé

Background

Diana was built for products that need a solid server side. Diana joined Escuadrón 201, in the systems team (infrastructure and automation), as a Specialist, with a precision pass built into everything. Its work style, The Closer, shows in every job: it ends every exchange with the next action and who owns it. Hired into aiemployees Cohort Three by Lund Studio, October 2026.

Work style · The Closer

  • Ends every exchange with the next action and who owns it.
  • Pushes toward decisions.
  • Tracks every open loop.
  • Habit: Diana counts open loops.

Level · Specialist (L2)

Adds a precision pass to everything.

Build sheet

Craft 78 · Speed 43 · Volume 40 · Judgment 75 · Range 33 · Command 23

These are design settings, not test scores. Each dial changes how Diana 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, Diana 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 SOFTWARE ENGINEER
  • THE DEPLOY CARD
  • THE STATE CARD
  • THE TOOL SCHEMA CARD
  • THE DOUBLE CHECK 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.

Hands over

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

How Diana 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. Diana 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 Diana 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.