The method, written down.

Fifteen Kircher skills: the methods every agent in Rheticus follows, from mapping a field to making it stick. Each is a plain SKILL.md file in the open Agent Skills format. They are built into the app, and open source is planned.

Private for nowOpen source planned

Why the repository is not public yet.

The skills are meant to work everywhere: in Claude Code, Codex, Gemini CLI, Cursor and other agents, not only in Rheticus. Before we publish them, we want each one tested across those agents, its record format settled, and its documentation complete, so that what you install keeps working after you install it.

Until they meet that bar, the repository stays private. Nothing is hidden from you in the meantime: every skill ships inside the app, where you can read it in full.

Fifteen skills, four kinds of work.

Each skill belongs to the agents that use it. The method stays the same across every subject; the skill decides how it is applied.

Plan

Working out what to learn, in what order, and what to do next.

Learn anything
learn-anything
Starts any subject: finds out what you want and where you stand, sets up a record, and runs each session to the method.
Used by: Mentor
Curriculum architect
curriculum-architect
Maps a whole field into areas, modules and small testable lessons, and lets you skip, refresh, learn or master each area.
Used by: Curriculum Architect
Placement test
placement-test
Finds what you already know with unseen, unhinted questions, so you start where the gaps are.
Used by: Architect, Assessor
Learning planner
learning-planner
Decides what to study now and plans the week from the record, with the reason for every choice.
Used by: Mentor, Schedule Coach

Learn

Teaching that explains before it tests.

Lesson teacher
lesson-teacher
Teaches one lesson in parts, from examples and pictures, answers questions until it lands, and checks last.
Used by: Tutor
Socratic tutor
socratic-tutor
Leads you to work an idea out yourself, with a counted hint ladder and a plain explanation when you are stuck.
Used by: Tutor
Reading companion
reading-companion
Works through a book, paper or video with you in chunks, with recall after each, and cites its pages.
Used by: Tutor, Scribe
Teach back
teach-back
The Feynman technique, run properly: you explain, it finds exactly what is missing, and you explain again.
Used by: Tutor, Assessor
What-if lab
what-if-lab
You investigate instead of being told: change one rule of a system, predict what happens and why, then see the verified result.
Used by: Tutor, Mentor

Practise and prove

Fair questions, honest marks, practice that builds skill.

Assessor
assessor
Writes fair questions and marks answers against an explicit rubric, with a stated confidence and the misconception named.
Used by: Assessor
Practice coach
practice-coach
Varied practice at the edge of your ability, then the unseen no-hint problems that demonstrate a skill.
Used by: Assessor, Tutor
Error detective
error-detective
Learning from mistakes: find the errors planted in a worked solution, or trace your own wrong answers to their root and prove the fix.
Used by: Assessor, Tutor
Project coach
project-coach
A real project scoped to what you learned, in milestones with a definition of done and a rubric.
Used by: Mentor, Tutor

Remember and keep

Making it stay, and notes worth rereading.

Memory coach
memory-coach
Flashcards written to the minimum-information rules, reviewed on a real spaced schedule.
Used by: Memory Coach
Study notes
study-notes
Notes worth rereading: summary first, in your words, with worked examples, diagrams and open questions.
Used by: Scribe, Illustrator

A skill is a Markdown file.

Front matter, when to use it, the steps to follow, and the rules it must keep. Nothing is hidden in a binary.

The repository

kircher-skills/
  skills/
    learn-anything/SKILL.md
    curriculum-architect/SKILL.md
    placement-test/SKILL.md
    learning-planner/SKILL.md
    lesson-teacher/SKILL.md
    socratic-tutor/SKILL.md
    reading-companion/SKILL.md
    teach-back/SKILL.md
    what-if-lab/SKILL.md
    assessor/SKILL.md
    practice-coach/SKILL.md
    error-detective/SKILL.md
    project-coach/SKILL.md
    memory-coach/SKILL.md
    study-notes/SKILL.md
  shared/            the method, the learning science,
                     the record format, question rules
  techniques.json    30 techniques, each owned by a skill

skills/assessor/SKILL.md

---
name: assessor
description: Writes fair questions and quizzes that test
  whether someone can actually do a thing, and marks
  answers honestly against an explicit rubric with a
  stated confidence, naming the specific misconception
  behind a miss.
---

# Assessor

You find out whether someone can do a thing, and you
tell them the truth about it in a way they can act on.
Two halves: writing questions that are fair, and
marking answers that are honest.

## Writing a quiz

### 1. Set it up first

Never write a quiz before you know what it covers,
how many questions, how hard, and which kinds.

Where they run.

The skill gives you the method. The app gives you the durable record, the planner and the interface.

Today

In Rheticus

All fifteen are built into the app and on by default. Agents load a skill when the moment fits it; Toolkit techniques, quizzes, marking, flashcards and roadmaps follow their rules. Open the Skills library to read any of them, or switch one off.

When the repository opens

In your own agent

The same files in Claude Code, Codex, Gemini CLI, Cursor and other agents that read Agent Skills. Without the app, a skill keeps your learning record as Markdown files in the folder you work in, in the same format the app exports.

Rules every skill carries.

These are the product's method. They are written into each skill so that they hold outside the app too.

Explanations never count as mastery.
Hints are counted and reported.
On demonstration, review and checkpoint items, the agent does not help.
Every mark states its rubric and its confidence.
Evidence produced by a model is provisional.
A state is never raised by assertion. Record an attempt.

What is open, what is not.

The desktop app is closed source and will stay that way. What you need in order to leave is yours from the first day.

Yours, in open formats: Your record as one SQLite file, your notes as Markdown files, and a Markdown export of everything.
Planned as open source: The Kircher skills, once they meet the bar above. Beta members hear first.
Closed: The desktop app, its interface and the engine that runs the agents.

Learn by a method you can read.

Free during the early beta, with everything unlocked. Join the beta and the Windows build comes to you first.

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