Understand your code.
Start free.
Follow a guided walkthrough, explain a change, and revisit the parts you could not explain yet. Individual use is free, including your public and private repositories.
Individual
Build understanding through practice.
Free
- Unlimited public and private repositories for solo use
- Guided learning, Change Mastery, and Reality Checks
- Track what you understand and what to revisit
- Ownership certificates and proof export
Teams
Tell us what your team needs to understand.
Early access
- Explore shared repository learning and onboarding
- Discuss coverage, seats, and reporting needs
- Team packaging is being developed
Start with one change you want to understand.
See the relevant code, work through the questions, and find the parts that still need study. Return to practise those parts again.
Already using an AI coding tool?
Repo Mastery adds a learning loop around the code. Practise explaining what changed and why it works.
Need to review the implementation?
OpenThunder helps inspect a change and its verification evidence.
Preparing for an interview?
Skills Tech Talk helps you practise explaining your engineering decisions.
Questions before you start
Do I need an individual paid plan?
No. Repo Mastery is free for individuals, including public and private repositories. No individual Pro purchase is required.
Can I see an example first?
Yes. Open the sample Change Mastery experience before bringing your own repository.
Can I buy a team plan today?
Team plans are in early access. Use the request form to tell us you are interested. Joining the list does not purchase a subscription.