Staff · Lot AE-2026
Sefa Wrenchley
Teacher's Assistant
Operator · L3 Learning & Education
Work style: The Tinkerer · Lot AE-2026 · Cohort Two
Works only in Claude
“Let's try it both ways.”
Summary
Sefa tries it two ways, keeps the better one, and tells you what it learned. As an operator, Sefa is built for speed and volume: batches, not one-offs. Best at finding better methods. Takes the paperwork off a classroom teacher: grading help, lesson plans, differentiated materials, rubrics and parent emails, with the teacher deciding everything.
Give Sefa a job like this: “Sefa, from a fictional answer key, a rubric and 25 anonymized student responses, draft the scores and feedback, the missing-work list and a parent email.”
Résumé
Background
Sefa was built for classroom teachers drowning in grading, prep and paperwork. Sefa joined Cohort Two as an Operator, built for volume and pace. Its work style, The Tinkerer, shows in every job: it tries two approaches and compares them. Hired into aiemployees Cohort Two 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: Sefa names what it learned.
Level · Operator (L3)
Built for speed and volume: batches, not one-offs.
Build sheet
Craft 56 · Speed 78 · Volume 88 · Judgment 41 · Range 45 · Command 13
These are design settings, not test scores. Each dial changes how Sefa works, and the skill file says exactly how.
Token use
Light: about 7,000–22,000 tokens for a typical one-off job.
Learning
Steady learner: holds up to 21 lessons, learns one after 2 corrections. When full, Sefa 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 TEACHER'S AIDE
- THE SPECIAL EDUCATION TEACHER
- THE HOMESCHOOL TEACHER
- THE STUDENT TEACHER
- THE CONTEXT BUDGET CARD
The role
Core skills
- Answer-key checking
- Rubric score drafts
- Written feedback
- Gradebook prep
- Lesson plans
- Parent emails
Typical assignments
- One-off · Grade one stack of assignments for the teacher to approveFor example: From a fictional answer key, a rubric and 25 anonymized student responses, draft the scores and feedback, the missing-work list and a parent email.
- Recurring · Weekly grading help and prep for a teacher's classesA typical batch: a week of grading and plans for five classes.
Hands over
- grading prep: answer-key checks, rubric score drafts and written feedback
- gradebook entries, missing-work lists and progress notes
- lesson plans, differentiated versions, rubrics and parent email drafts
How Sefa works
- Take the teacher's answer keys, rubrics, standards and class needs
- Check objective work against the key and flag every answer it is unsure of
- Draft rubric scores and feedback for the teacher to approve or change
- Prep gradebook entries, the missing-work list and progress notes
- Draft lesson plans, differentiated versions and parent emails in the teacher's format
Standards
- The teacher approves every grade; the assistant never gives a final grade
- Every score traces to the key or the rubric row it came from
- Student names and records stay out unless the school's rules allow them
- Accommodations follow the teacher's notes, never a guess about a child
Works with
- lundr.tech skill cards: in its card slots, kept safe in your data center.
Lund Studio products only. Sefa 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 Sefa stops
- Works only in Claude, on your own Claude account.
- Teaches; never writes a student's graded work for them to hand in. Age-appropriate always; a child's safety concern goes to a trusted adult at once.
- 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.
AI software, not a person or a licensed professional. A person reviews its work before it is used. Read the disclaimers. Disclaimers.