feat(worker): add DefaultAgentSeeder for first-launch agent seeding

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/ClaudeDo.Worker.Tests/Services/DefaultAgentSeederTests.cs

@@ -0,0 +1,112 @@
+using ClaudeDo.Worker.Services;
+
+namespace ClaudeDo.Worker.Tests.Services;
+
+public sealed class DefaultAgentSeederTests : IDisposable
+{
+    private readonly string _bundleDir;
+    private readonly string _targetDir;
+
+    public DefaultAgentSeederTests()
+    {
+        var root = Path.Combine(Path.GetTempPath(), $"claudedo_seeder_{Guid.NewGuid():N}");
+        _bundleDir = Path.Combine(root, "bundle");
+        _targetDir = Path.Combine(root, "target");
+        Directory.CreateDirectory(_bundleDir);
+        Directory.CreateDirectory(_targetDir);
+    }
+
+    public void Dispose()
+    {
+        try { Directory.Delete(Path.GetDirectoryName(_bundleDir)!, true); } catch { }
+    }
+
+    private async Task WriteBundleAsync(string name, string content)
+    {
+        await File.WriteAllTextAsync(Path.Combine(_bundleDir, name), content);
+    }
+
+    [Fact]
+    public async Task SeedMissing_CopiesAllFiles_WhenTargetEmpty()
+    {
+        await WriteBundleAsync("a.md", "A");
+        await WriteBundleAsync("b.md", "B");
+        var seeder = new DefaultAgentSeeder(_bundleDir, _targetDir);
+
+        var result = await seeder.SeedMissingAsync();
+
+        Assert.Equal(2, result.Copied);
+        Assert.Equal(0, result.Skipped);
+        Assert.True(File.Exists(Path.Combine(_targetDir, "a.md")));
+        Assert.True(File.Exists(Path.Combine(_targetDir, "b.md")));
+    }
+
+    [Fact]
+    public async Task SeedMissing_SkipsExistingFiles()
+    {
+        await WriteBundleAsync("a.md", "bundled");
+        await File.WriteAllTextAsync(Path.Combine(_targetDir, "a.md"), "user-modified");
+        var seeder = new DefaultAgentSeeder(_bundleDir, _targetDir);
+
+        var result = await seeder.SeedMissingAsync();
+
+        Assert.Equal(0, result.Copied);
+        Assert.Equal(1, result.Skipped);
+        var content = await File.ReadAllTextAsync(Path.Combine(_targetDir, "a.md"));
+        Assert.Equal("user-modified", content);
+    }
+
+    [Fact]
+    public async Task SeedMissing_MixedState_CopiesOnlyMissing()
+    {
+        await WriteBundleAsync("a.md", "A");
+        await WriteBundleAsync("b.md", "B");
+        await File.WriteAllTextAsync(Path.Combine(_targetDir, "a.md"), "existing");
+        var seeder = new DefaultAgentSeeder(_bundleDir, _targetDir);
+
+        var result = await seeder.SeedMissingAsync();
+
+        Assert.Equal(1, result.Copied);
+        Assert.Equal(1, result.Skipped);
+        Assert.Equal("existing", await File.ReadAllTextAsync(Path.Combine(_targetDir, "a.md")));
+        Assert.Equal("B", await File.ReadAllTextAsync(Path.Combine(_targetDir, "b.md")));
+    }
+
+    [Fact]
+    public async Task SeedMissing_ReturnsZero_WhenBundleDirMissing()
+    {
+        var missingBundle = Path.Combine(Path.GetTempPath(), $"claudedo_missing_{Guid.NewGuid():N}");
+        var seeder = new DefaultAgentSeeder(missingBundle, _targetDir);
+
+        var result = await seeder.SeedMissingAsync();
+
+        Assert.Equal(0, result.Copied);
+        Assert.Equal(0, result.Skipped);
+    }
+
+    [Fact]
+    public async Task SeedMissing_CreatesTargetDir_IfMissing()
+    {
+        await WriteBundleAsync("a.md", "A");
+        var missingTarget = Path.Combine(_targetDir, "nested", "created");
+        var seeder = new DefaultAgentSeeder(_bundleDir, missingTarget);
+
+        var result = await seeder.SeedMissingAsync();
+
+        Assert.Equal(1, result.Copied);
+        Assert.True(File.Exists(Path.Combine(missingTarget, "a.md")));
+    }
+
+    [Fact]
+    public async Task SeedMissing_IgnoresNonMarkdownFiles()
+    {
+        await WriteBundleAsync("a.md", "A");
+        await File.WriteAllTextAsync(Path.Combine(_bundleDir, "readme.txt"), "not an agent");
+        var seeder = new DefaultAgentSeeder(_bundleDir, _targetDir);
+
+        var result = await seeder.SeedMissingAsync();
+
+        Assert.Equal(1, result.Copied);
+        Assert.False(File.Exists(Path.Combine(_targetDir, "readme.txt")));
+    }
+}