docs: Update documentation, README, and CHANGELOG for Phase 5

CHANGELOG.md

@@ -5,6 +5,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.3.0] - 2026-06-25
+
+### Added
+
+- **Porcelain `commit` command:** Added high-level `commit` command bridging the gap from plumbing to porcelain.
+- **Refs Management:** Implemented branch pointer mutation and HEAD resolution.
+- **Configurable Author:** Modified `commit` logic to read author and committer data from the `.git/config` file.
+
 ## [0.2.0] - 2026-06-24
 
 ### Added

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "git-rs"
-version = "0.2.0"
+version = "0.3.0"
 edition = "2021"
 authors = ["Fady Philip <fadyph2003@gmail.com>"]
 description = "A from-scratch implementation of Git's core object storage engine in Rust."

README.md

@@ -15,7 +15,7 @@
 </p>
 
 <p align="center">
-  <img src="https://img.shields.io/badge/Status-Phase_4_Complete-success?" alt="Status" />
+  <img src="https://img.shields.io/badge/Status-Phase_5_Complete-success?" alt="Status" />
   <img src="https://img.shields.io/badge/License-MIT-royalblue" alt="License" />
 </p>
 

docs/04_commit_object_and_commit_tree.md

@@ -242,7 +242,7 @@ graph LR
     E --> F["History (DAG)"]
 ```
 
-The `commit-tree` command in `git-rs` currently uses hardcoded author/committer information for simplicity. In Phase 5, this will be configurable through Git's standard configuration mechanism (user.name, user.email) or environment variables.
+The `commit-tree` command in `git-rs` used hardcoded author/committer information for simplicity in Phase 4. In Phase 5, this is configurable through Git's standard configuration mechanism (user.name, user.email).
 
 ---
 

docs/05_dag_and_commit_serialization.md

@@ -276,7 +276,7 @@ Fady <fady@test.com> 1718000000 +0000
 | Cherry-pick | Alice (original author) | Bob (performed the cherry-pick) |
 | Rebase | Alice (original author) | Bob (performed the rebase) |
 
-In `git-rs` Phase 4, author and committer are identical for simplicity. Phase 5 will support reading these from Git configuration or environment variables.
+In `git-rs` Phase 4, author and committer are identical for simplicity. Phase 5 supports reading these from Git configuration.
 
 ---
 
@@ -309,7 +309,7 @@ Even though there are 3 commits, `blob-a` and `blob-c` are each stored only once
 The `commit-tree` command in `git-rs` implements the following:
 
 1. **Parses arguments** (tree hash, `-m` flag, message)
-2. **Constructs a Commit struct** with hardcoded author info (Phase 5 will make this configurable)
+2. **Constructs a Commit struct** with hardcoded author info (Phase 5 makes this configurable)
 3. **Generates timestamp** using Unix epoch seconds
 4. **Serializes the commit** to text with proper line endings
 5. **Calls `write_object("commit", ...)`** to hash, compress, store, and return the hash