First Move (11~18) - Code, Learn, Build
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First Move (11~18) - Code, Learn, Build

Structured, level-based technology learning paths from foundational exploration to industry mastery.

Learning Domains

  • Python Programming (Active)
  • Computer Science Core
  • Web Development
  • AI & Machine Learning

Platform Architecture

  • Level-Based Progression
  • Decoupled Content Schema
  • Modular Code Execution Engine
  • Curated Official Resources

© 2026 First Move (11~18) • CODE • LEARN • BUILD. Built with Next.js App Router.

Readability & Accessibility First

← Git & GitHub Collaboration Mastery|Level 1: Distributed Version Control & Git Mechanics

1. Git Architecture, Staging Area & Atomic Commits

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Git Architecture, Staging Area & Atomic Commits

Initialize Git repositories, understand Working Tree vs Staging Index vs Commit HEAD, and write atomic commit messages.

Learning Objectives & The Three States of Git

### Learning Objectives - Differentiate between Centralized (SVN) and Distributed (Git) Version Control Systems. - Navigate the three states of Git: Working Tree, Staging Index, and Commit HEAD. - Inspect project history and file diffs using `git log` and `git diff`. - Write atomic Conventional Commit messages (`feat:`, `fix:`, `docs:`). --- ### The Three Local States of Git Git tracks files through three local areas: 1. **Working Directory**: Modified files on disk not yet staged. 2. **Staging Area (Index)**: Proposed commit snapshot formatted via `git add`. 3. **Local Repository (`.git` directory)**: Permanent immutable snapshot commits stored as directed acyclic graph (DAG) objects.
💻 Ready to test your knowledge with code?
Solve the hands-on coding exercise in the interactive code editor.