Compression and Deduplication

What a Ref Points To

The Commit DAG

Purpose of the Reflog

Content-Addressable Storage

Plumbing vs Porcelain

Trees and Directory Structure

What Blobs Store

Loose Objects vs Packfiles

Detached HEAD State

Packed vs Unpacked Refs

Objects Are Immutable

Lightweight vs Annotated Tags

Commit Parent Pointers

What the Index Tracks

Git's Four Object Types

Plumbing vs Porcelain Commands

Git's Object Database and Object Lookup

Data Integrity via Hash Chaining

Loose Objects vs Packed Objects

Packfiles and Object Compression

Object Deduplication and Shared Blob Storage

Inside Git's Index (Staging Area)

References and the refs/ Namespace

The DAG: Commits as a Directed Acyclic Graph

Commit Object Anatomy

How Trees Represent Directory Structure

Git Config Levels (system/global/local)

Refs and the refs Directory

Loose Objects vs Packfiles

Blob Objects

Parent Commits and Merge Commits Linkage

Lightweight vs Annotated Tags

Tag Objects (Annotated Tags)

The Reflog Mechanism

Immutability of Git Objects

The Commit Graph (DAG) Structure

Detached HEAD State

Plumbing vs Porcelain Commands

Tree Objects

The .git Directory Structure

Object Compression and Delta Storage

Commit Objects Internal Structure

The Object Database (.git/objects)

Git Object Model Overview

Content-Addressable Storage in Git

Git's Four Object Types

Inside the .git Directory