Repo Mastery™

Master any codebase faster.

Repo Mastery turns real repositories into architecture maps, guided lessons, flashcards, drills, and proof that you understand the system.

Private repo support, local analysis, and cloud analysis depend on your selected workflow.

The problem

The cost of not understanding the code

Every team pays for shallow understanding, in slower delivery, weaker reviews, and knowledge that walks out the door.

New codebases take too long to understand.

AI can generate code faster than engineers can explain it.

Onboarding is inconsistent.

Architecture knowledge lives in a few people's heads.

Engineers struggle to explain real systems in interviews, reviews, and promotion conversations.

How it works

From repository to real mastery

Five steps take you from a repo you barely know to a system you can explain and defend.

1

Connect or select a repo

Point Repo Mastery at a public sample or your own private repository.

2

Generate repo intelligence

We map the architecture, workflows, entities, and risks automatically.

3

Follow a mastery path

Guided lessons take you through the system in the right order.

4

Practice explaining the system

Flashcards, quizzes, and drills turn recognition into recall.

5

Build proof that you understand it

Earn a mastery score and a proof portfolio artifact you can share.

What you get

What Repo Mastery™ creates

One repo becomes a full learning surface: intelligence, practice, and proof.

Repo overview

A clear summary of what the system does and how it is built.

Architecture map

The major components and how they connect at a glance.

Key files and hotspots

The files that matter most and the ones that change often.

Main workflows

The core paths a request or job takes through the system.

Domain entities

The real-world concepts the code is built around.

API map

The endpoints and interfaces the system exposes.

Security and risk summary

Where sensitive logic lives and where risk concentrates.

Glossary

Plain-language definitions for the system's key terms.

Flashcards

Spaced-repetition cards that lock in the essentials.

Codebase quiz

Targeted questions that check your understanding.

Architecture explanation drill

Practice walking someone through the system out loud.

Codebase defense drill

Handle hard follow-up questions about your design choices.

Suggested improvements

Concrete ideas for where the system could get better.

Mastery score

A single measure of how well you know the repo.

Proof portfolio artifact

Shareable evidence that you understand the system.

Use cases

Built for the moments understanding matters

Wherever you need to know a system cold, Repo Mastery gets you there.

Joining a new team

Ramp on an unfamiliar codebase in days, not months.

Preparing for an interview

Walk in able to explain a real system with confidence.

Understanding AI-generated code

Know exactly what the AI built before you ship it.

Onboarding engineers

Give every new hire the same strong starting point.

Reducing knowledge silos

Spread architecture knowledge beyond a few key people.

Reviewing legacy systems

Map old code fast so you can change it safely.

Preparing architecture reviews

Show up ready to defend the design under scrutiny.

Explaining a repo to leadership

Translate the system into terms decision-makers trust.

Product preview

Your repo, understood at a glance

A live view of where you stand on a repository and what to do next.

Repo Mastery Dashboard  /  acme-payments-api
Mastery score
72%
On track to mastery
Architecture confidence
High
Core systems mapped
Top systems
  • Payments core
  • Ledger core
  • Webhooks async
  • Auth shared
Key workflows
  • Charge a merchant mastered
  • Settle a payout in progress
  • Retry failed webhook new
Entity map
Merchant Charge Payout Ledger Entry
Practice and proof
2
Practice drills
48
Flashcards
3
Proof artifacts
Next recommended action

Run the architecture explanation drill on the Payments system to move your mastery score from 72% toward 85%.

Pricing

Start free, master what matters

Pick the plan that fits how you learn and how your team works.

Free Demo

Free

Public sample repos only. Explore the full experience before you bring your own code.

View demo repo

Team

$29/user/mo

Shared repos, onboarding paths, and team dashboards to spread understanding.

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Business

Contact us

Admin controls, reporting, governance, and integrations for the whole org.

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Team plans: join the waitlist

Repo Mastery is live now. Team and Business plans are launching soon: get early access and updates.

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Part of Skills Tech

One system, four products

OpenThunder understands the repo. Repo Mastery helps you master it. Skills Tech Talk® helps you explain and defend it. Skills Tech Workspace ties it together.