From 548251841f6f21b356229577cecb0e15e44b2b9f Mon Sep 17 00:00:00 2001
From: Mika Kuns <mika.kuns@fb-tuning.de>
Date: Wed, 15 Apr 2026 09:48:29 +0200
Subject: [PATCH] feat(installer): add WriteInstallManifestStep

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 .../Steps/WriteInstallManifestStep.cs         | 25 +++++++++
 .../WriteInstallManifestStepTests.cs          | 51 +++++++++++++++++++
 2 files changed, 76 insertions(+)
 create mode 100644 src/ClaudeDo.Installer/Steps/WriteInstallManifestStep.cs
 create mode 100644 tests/ClaudeDo.Installer.Tests/WriteInstallManifestStepTests.cs

diff --git a/src/ClaudeDo.Installer/Steps/WriteInstallManifestStep.cs b/src/ClaudeDo.Installer/Steps/WriteInstallManifestStep.cs
new file mode 100644
index 0000000..32ae104
--- /dev/null
+++ b/src/ClaudeDo.Installer/Steps/WriteInstallManifestStep.cs
@@ -0,0 +1,25 @@
+using System.IO;
+using ClaudeDo.Installer.Core;
+
+namespace ClaudeDo.Installer.Steps;
+
+public sealed class WriteInstallManifestStep : IInstallStep
+{
+    public string Name => "Write Install Manifest";
+
+    public Task<StepResult> ExecuteAsync(InstallContext ctx, IProgress<string> progress, CancellationToken ct)
+    {
+        if (string.IsNullOrWhiteSpace(ctx.InstalledVersion))
+            return Task.FromResult(StepResult.Fail("Installed version is not set — DownloadAndExtractStep must run first."));
+
+        var manifest = new InstallManifest(
+            Version: ctx.InstalledVersion!,
+            InstallDir: ctx.InstallDirectory,
+            WorkerDir: Path.Combine(ctx.InstallDirectory, "worker"),
+            InstalledAt: DateTimeOffset.UtcNow);
+
+        InstallManifestStore.Write(ctx.InstallDirectory, manifest);
+        progress.Report($"Wrote {InstallManifestStore.ManifestPath(ctx.InstallDirectory)}");
+        return Task.FromResult(StepResult.Ok());
+    }
+}
diff --git a/tests/ClaudeDo.Installer.Tests/WriteInstallManifestStepTests.cs b/tests/ClaudeDo.Installer.Tests/WriteInstallManifestStepTests.cs
new file mode 100644
index 0000000..3dc4044
--- /dev/null
+++ b/tests/ClaudeDo.Installer.Tests/WriteInstallManifestStepTests.cs
@@ -0,0 +1,51 @@
+using ClaudeDo.Installer.Core;
+using ClaudeDo.Installer.Steps;
+
+namespace ClaudeDo.Installer.Tests;
+
+public sealed class WriteInstallManifestStepTests : IDisposable
+{
+    private readonly string _installDir;
+
+    public WriteInstallManifestStepTests()
+    {
+        _installDir = Path.Combine(Path.GetTempPath(), "ClaudeDoWriteManifest-" + Guid.NewGuid().ToString("N"));
+        Directory.CreateDirectory(_installDir);
+    }
+
+    public void Dispose()
+    {
+        try { Directory.Delete(_installDir, recursive: true); } catch { }
+    }
+
+    [Fact]
+    public async Task Writes_Manifest_WithAllFields()
+    {
+        var ctx = new InstallContext
+        {
+            InstallDirectory = _installDir,
+            InstalledVersion = "0.2.0",
+        };
+
+        var step = new WriteInstallManifestStep();
+        var result = await step.ExecuteAsync(ctx, new Progress<string>(_ => { }), CancellationToken.None);
+
+        Assert.True(result.Success);
+        var manifest = InstallManifestStore.TryRead(_installDir);
+        Assert.NotNull(manifest);
+        Assert.Equal("0.2.0", manifest!.Version);
+        Assert.Equal(_installDir, manifest.InstallDir);
+        Assert.Equal(Path.Combine(_installDir, "worker"), manifest.WorkerDir);
+    }
+
+    [Fact]
+    public async Task Fails_When_InstalledVersion_Missing()
+    {
+        var ctx = new InstallContext { InstallDirectory = _installDir };  // no version set
+
+        var step = new WriteInstallManifestStep();
+        var result = await step.ExecuteAsync(ctx, new Progress<string>(_ => { }), CancellationToken.None);
+
+        Assert.False(result.Success);
+    }
+}