01
It starts by itself
daily review session. Runs in Claude Code routine.
- ↻ daily review session
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sanyuan0704 · 5K installsSigma skill
Runs by itself, every evening.
What you learn sticks.
Install the Sigma skill and make it a habit: follow https://gethabit.dev/skills/sanyuan0704/sigma.md
- 1Copy
- 2Paste into Claude Code, Codex or Cursor
- 3It runs by itself
5K installs4K starsMIT licenceSource on GitHub ↗
Sigma
by sanyuan0704 · 5K installs
The skill
Teaches you a topic step by step with questions.
Only when you ask.
Learn more
What you learn sticks. Quick daily reviews keep it in your head.
↻ Runs by itselfevery evening
How the habit works.
You don't have to.
When does it start? How does it check its work? What does it remember?
One run, step by step.
Then it stops.
Stops after at most 5 review questions and one new concept per session.
- 01
Load memory
Read sigma/learner-profile.md and the topic's session.md with --resume.
- 02
Review due concepts
Ask one recall question for each mastered concept whose interval has passed, at most 5.
- 03
Update intervals
Double the interval on a correct answer up to 32 days, or reset it to 1 day.
- 04
Clear misconceptions
Address unresolved misconceptions with counter-examples before new content.
- 05
Tutor the next concept
Ask 1 to 2 questions per round, never give answers, and check mastery with the rubric.
- 06
Practice and sync
Give a small practice task before marking mastery and update session.md and roadmap.html.
What it may do.
Nothing more.
It writes only in its own folder and asks you before anything goes out.
- Writes only insigma/**
- Talks tono outside service
- Sendsnothing
- Your OKIt asks you before anything goes out.
Is it for you?
Use it when it fits.
Read both lists. If the left one sounds like you, the Sigma skill helps.
Use it when
- ✓ You want to learn a new topic
- ✓ You need a concept explained step by step
- ✓ You want spaced review of a topic
Skip it when
- – You only need a quick answer
- – You do not want to be quizzed
Sigma skill, answered.
Will the tutor just tell me the answer?
No. The core rule is to ask questions and give minimal hints, never direct answers.
When is a concept mastered?
After a rubric score of at least 80% and a passed practice task.
Does it open my browser every round?
No. It opens the roadmap only on first creation or when you ask.
How do I install the Sigma skill?
Copy the prompt at the top into your agent. It installs the skill from sanyuan0704/sanyuan-skills and sets up the habit. Or run npx skills add sanyuan0704/sanyuan-skills --skill sigma.
Is the Sigma skill free?
Yes. It is published under MIT. Habit is free too.
Sigma. Now as a habit.
Install the Sigma skill and make it a habit: follow https://gethabit.dev/skills/sanyuan0704/sigma.md
All sanyuan0704 skills →More notes skills →
Works in
- Claude Code
- Codex
- Cursor
- ChatGPT
- Claude app
Made by sanyuan0704, published under MIT. Habit links to the original and never changes it. Is this your skill?