diff --git a/readme.md b/readme.md
index 9525def..4b9b920 100644
--- a/readme.md
+++ b/readme.md
@@ -2,15 +2,42 @@
 
 <img align="right" width="160px" height="160px" src="https://raw.githubusercontent.com/xoofx/XenoAtom.UnixTools/main/img/XenoAtom.UnixTools.png">
 
-This is a default project description.
+This project provides a set of Unix tools for .NET 8.0+.
 
-## ✨ Features
-
-- TODO
+> **Note**: This project is still in early development and the API is subject to change.
 
-## 📖 User Guide
+## ✨ Features
 
-For more details on how to use XenoAtom.UnixTools, please visit the [user guide](https://github.com/xoofx/XenoAtom.UnixTools/blob/main/doc/readme.md).
+- **CPIO Archive**: Read and write CPIO archives (Only the newc format is supported)
+- **UnixInMemoryFileSystem**: A simple in-memory file system to manipulate files and directories
+  - This in memory filesystem can be used to easily manipulate in and out CPIO archives
+- .NET 8.0+ compatible and NativeAOT ready
+
+## 📖 Usage
+
+Reading a CPIO archive:
+
+```csharp
+var cpioReader = new CpioReader(File.OpenRead("archive.cpio"));
+while (cpioReader.TryGetNextEntry(out var entry))
+{
+    Console.WriteLine($"Entry: {entry.Name} {entry.FileType} ({entry.Mode})");
+})
+```
+
+Writing a CPIO archive with a `UnixInMemoryFileSystem`:
+
+```csharp
+var stream = new MemoryStream();
+var fs = new UnixInMemoryFileSystem();
+fs.CreateDirectory("/dir1");
+fs.CreateDirectory("/dir1/dir2");
+fs.CreateFile("/dir1/file1.txt", "Hello World");
+{
+    using var writer = new CpioWriter(File.Create("archive.cpio"));
+    fs.WriteTo(writer);
+}
+```
 
 ## 🪪 License
 
diff --git a/src/XenoAtom.UnixTools.Tests/CpioTests.cs b/src/XenoAtom.UnixTools.Tests/CpioTests.cs
index 14ac586..7e5655d 100644
--- a/src/XenoAtom.UnixTools.Tests/CpioTests.cs
+++ b/src/XenoAtom.UnixTools.Tests/CpioTests.cs
@@ -2,11 +2,93 @@
 // Licensed under the BSD-Clause 2 license.
 // See license.txt file in the project root for full license information.
 
+using System.Text;
+
 namespace XenoAtom.UnixTools.Tests;
 
 [TestClass]
 public class CpioTests
 {
+    [TestMethod]
+    public void TestWriterWithFileSystem()
+    {
+        var stream = new MemoryStream();
+        var fs = new UnixInMemoryFileSystem();
+        fs.CreateDirectory("/dir1");
+        fs.CreateDirectory("/dir1/dir2");
+        fs.CreateFile("/dir1/file1.txt", "Hello World");
+        {
+            //using var writer = new CpioWriter(File.Create("archive.cpio"));
+            using var writer = new CpioWriter(stream, true);
+            fs.WriteTo(writer);
+        }
+
+        stream.Position = 0;
+        var reader = new CpioReader(stream, true);
+        var fsOut = new UnixInMemoryFileSystem();
+        fsOut.ReadFrom(reader);
+
+        CollectionAssert.AreEqual(fs.RootDirectory.EnumerateFileSystemEntries(SearchOption.AllDirectories).Select(x => x.FullPath).ToList(), fsOut.RootDirectory.EnumerateFileSystemEntries(SearchOption.AllDirectories).Select(x => x.FullPath).ToList());
+    }
+
+    [TestMethod]
+    public void TestManualArchiveReadWrite()
+    {
+        var entry = new CpioEntry
+        {
+            Name = "test.txt",
+            InodeNumber = 0,
+            FileType = CpioFileType.RegularFile,
+            Mode = UnixFileMode.UserRead | UnixFileMode.UserWrite,
+            Uid = 0,
+            Gid = 0,
+            Length = 11,
+            HardLinkCount = 1,
+            Device = new DeviceId(1, 3),
+            ModificationTime = new DateTimeOffset(2010, 1, 1, 0, 0, 0, default),
+            Checksum = 0,
+            DataStream = new MemoryStream(Encoding.UTF8.GetBytes("Hello World"))
+        };
+
+        var fileStream = new MemoryStream();
+        using (var writer = new CpioWriter(fileStream, true))
+        {
+            writer.AddEntry(entry);
+        }
+
+        fileStream.Position = 0;
+        using (var reader = new CpioReader(fileStream))
+        {
+            Assert.IsTrue(reader.TryGetNextEntry(out var entryOut));
+            Assert.AreEqual(entry.Name, entryOut.Name);
+            Assert.AreEqual(entry.InodeNumber, entryOut.InodeNumber);
+            Assert.AreEqual(entry.FileType, entryOut.FileType);
+            Assert.AreEqual(entry.Mode, entryOut.Mode);
+            Assert.AreEqual(entry.Uid, entryOut.Uid);
+            Assert.AreEqual(entry.Gid, entryOut.Gid);
+            Assert.AreEqual(entry.Length, entryOut.Length);
+            Assert.AreEqual(entry.HardLinkCount, entryOut.HardLinkCount);
+            Assert.AreEqual(entry.Device, entryOut.Device);
+            Assert.AreEqual(entry.ModificationTime, entryOut.ModificationTime);
+            Assert.AreEqual(entry.Checksum, entryOut.Checksum);
+
+            Assert.AreEqual(entry.DataStream.Length, entryOut.DataStream.Length);
+
+            var contentIn = new MemoryStream();
+            var contentOut = new MemoryStream();
+            entry.DataStream.Position = 0;
+            entry.DataStream.CopyTo(contentIn);
+            entryOut.DataStream.Position = 0;
+            entryOut.DataStream.CopyTo(contentOut);
+
+            Assert.AreEqual(contentIn.Length, contentOut.Length);
+            for (int i = 0; i < contentIn.Length; i++)
+            {
+                Assert.AreEqual(contentIn.GetBuffer()[i], contentOut.GetBuffer()[i]);
+            }
+        }
+    }
+
     /// <summary>
     /// Test reading an existing archive and writing it as-is.
     /// </summary>
diff --git a/src/XenoAtom.UnixTools/XenoAtom.UnixTools.csproj b/src/XenoAtom.UnixTools/XenoAtom.UnixTools.csproj
index 333bd65..f3761d0 100644
--- a/src/XenoAtom.UnixTools/XenoAtom.UnixTools.csproj
+++ b/src/XenoAtom.UnixTools/XenoAtom.UnixTools.csproj
@@ -11,14 +11,14 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <Description>This is a default project description</Description>
+    <Description>This project provides a set of Unix tools for .NET 8.0+.</Description>
     <Copyright>Alexandre Mutel</Copyright>
     <NeutralLanguage>en-US</NeutralLanguage>
     <Authors>Alexandre Mutel</Authors>
-    <PackageTags>tag1;tag2;tag3</PackageTags>
+    <PackageTags>unix;cpio</PackageTags>
     <PackageReadmeFile>readme.md</PackageReadmeFile>
     <PackageIcon>XenoAtom.UnixTools.png</PackageIcon>
-    <PackageProjectUrl>https://github.com/xoofx/XenoAtom.UnixTools</PackageProjectUrl>
+    <PackageProjectUrl>https://github.com/XenoAtom/XenoAtom.UnixTools</PackageProjectUrl>
     <PackageLicenseExpression>BSD-2-Clause</PackageLicenseExpression>
     <!--Add support for sourcelink-->
     <PublishRepositoryUrl>true</PublishRepositoryUrl>