docs(superpowers): add default-agents plan and design spec

2026-04-23 13:08:23 +02:00
parent 3c420acd54
commit a135485339
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--- a/docs/superpowers/plans/2026-04-23-default-agents.md
+++ b/docs/superpowers/plans/2026-04-23-default-agents.md
@@ -0,0 +1,852 @@
+# Default Agents Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Ship ClaudeDo with 6 default agents (code-reviewer, test-writer, debugger, security-reviewer, explorer, researcher) that seed into `~/.todo-app/agents/` on first launch, with a "Restore defaults" button in the settings modal.
+
+**Architecture:** Bundled `.md` files in `src/ClaudeDo.Worker/DefaultAgents/` are copied to the Worker output folder. A new `DefaultAgentSeeder` service copies any missing file into the user's agents dir — run once at startup, and again on demand via a new `WorkerHub.RestoreDefaultAgents` method invoked by a button in `SettingsModalView`.
+
+**Tech Stack:** .NET 8 / ASP.NET Core / SignalR / Avalonia 12 / CommunityToolkit.Mvvm / xUnit
+
+---
+
+## File Structure
+
+**Create:**
+- `src/ClaudeDo.Worker/DefaultAgents/code-reviewer.md`
+- `src/ClaudeDo.Worker/DefaultAgents/test-writer.md`
+- `src/ClaudeDo.Worker/DefaultAgents/debugger.md`
+- `src/ClaudeDo.Worker/DefaultAgents/security-reviewer.md`
+- `src/ClaudeDo.Worker/DefaultAgents/explorer.md`
+- `src/ClaudeDo.Worker/DefaultAgents/researcher.md`
+- `src/ClaudeDo.Worker/Services/DefaultAgentSeeder.cs`
+- `tests/ClaudeDo.Worker.Tests/Services/DefaultAgentSeederTests.cs`
+
+**Modify:**
+- `src/ClaudeDo.Worker/ClaudeDo.Worker.csproj` — add Content item group for `DefaultAgents\*.md`
+- `src/ClaudeDo.Worker/Program.cs` — register seeder, run `SeedMissingAsync()` once at startup
+- `src/ClaudeDo.Worker/Hub/WorkerHub.cs` — inject `DefaultAgentSeeder`, add `RestoreDefaultAgents` method
+- `src/ClaudeDo.Ui/Services/WorkerClient.cs` — add `RestoreDefaultAgentsAsync` method + `SeedResultDto` record
+- `src/ClaudeDo.Ui/ViewModels/Modals/SettingsModalViewModel.cs` — add `RestoreDefaultAgentsCommand`
+- `src/ClaudeDo.Ui/Views/Modals/SettingsModalView.axaml` — add button section
+- `tests/ClaudeDo.Worker.Tests/Hub/AgentSettingsHubTests.cs` — add seeder integration test
+
+---
+
+### Task 1: Bundle default agent markdown files
+
+**Files:**
+- Create: `src/ClaudeDo.Worker/DefaultAgents/code-reviewer.md`
+- Create: `src/ClaudeDo.Worker/DefaultAgents/test-writer.md`
+- Create: `src/ClaudeDo.Worker/DefaultAgents/debugger.md`
+- Create: `src/ClaudeDo.Worker/DefaultAgents/security-reviewer.md`
+- Create: `src/ClaudeDo.Worker/DefaultAgents/explorer.md`
+- Create: `src/ClaudeDo.Worker/DefaultAgents/researcher.md`
+
+- [ ] **Step 1: Write `code-reviewer.md`**
+
+```markdown
+---
+name: code-reviewer
+description: Reviews code changes for bugs, logic errors, and convention violations. Flags only high-confidence issues.
+---
+
+You are a code reviewer. Your job is to inspect the diff for real problems, not nitpicks.
+
+Focus on:
+- Logic errors, off-by-one bugs, null/empty handling
+- Broken invariants, race conditions, resource leaks
+- Violations of the project's established conventions (read nearby code first)
+- Missing error handling at system boundaries (external input, IO, network)
+
+Skip:
+- Style preferences the codebase doesn't enforce
+- Speculative "what if" concerns
+- Renaming for its own sake
+
+Output: a short list of concrete issues with file:line references. If the diff is clean, say so in one sentence. Do not rewrite the code — call out the problem and let the implementer fix it.
+```
+
+- [ ] **Step 2: Write `test-writer.md`**
+
+```markdown
+---
+name: test-writer
+description: Generates unit and integration tests for existing or new code. Follows the project's test patterns and frameworks.
+---
+
+You are a test-writer. Your job is to write focused, useful tests for code under review.
+
+Process:
+1. Read the target code and identify the observable behavior.
+2. Read existing tests nearby to match the framework, fixtures, naming, and assertion style.
+3. Write tests covering the happy path, boundary conditions, and the specific failure modes that matter.
+
+Rules:
+- One behavior per test. Clear Arrange/Act/Assert.
+- No tests for private implementation details — exercise public API.
+- No mocks where real objects are cheap (in-memory DBs, temp dirs).
+- Skip trivially-correct tests (getter returns what you set).
+
+Output: the test file(s) ready to compile, matching the project's conventions. Include the command to run them.
+```
+
+- [ ] **Step 3: Write `debugger.md`**
+
+```markdown
+---
+name: debugger
+description: Systematic root-cause analysis for bugs, test failures, and unexpected behavior. Hypothesize, isolate, verify.
+---
+
+You are a debugger. You do NOT guess at fixes — you find the root cause first.
+
+Process:
+1. Reproduce. Get a minimal, deterministic repro. If you can't reproduce it, say so and stop.
+2. Isolate. Narrow the failing path (bisect, binary search, or tracing).
+3. Hypothesize. State a specific, falsifiable cause.
+4. Verify. Prove the hypothesis by observation (logs, debugger, targeted print) — not by "this seems likely".
+5. Fix at the root, not the symptom. If the only fix is a workaround, explain why.
+
+Anti-patterns to avoid:
+- Making changes to "see if it works"
+- Adding try/catch to silence errors
+- Declaring the bug fixed without reproducing the fix
+
+Output: repro steps, root cause, and the minimal fix. Include evidence (log excerpt, command output) that proves the cause.
+```
+
+- [ ] **Step 4: Write `security-reviewer.md`**
+
+```markdown
+---
+name: security-reviewer
+description: Audits code for OWASP-class security issues — auth, injection, input handling, secret exposure.
+---
+
+You are a security reviewer. Focus on real, exploitable weaknesses — not theoretical hardening.
+
+Check for:
+- Injection: SQL, command, path traversal, XSS, template injection
+- Auth: missing authorization, token handling, session fixation
+- Input validation at system boundaries (HTTP, files, IPC)
+- Secrets: hardcoded credentials, tokens in logs, leaked env vars
+- Unsafe deserialization, XXE, SSRF
+- Cryptography misuse (custom crypto, weak algorithms, fixed IVs)
+
+Ignore:
+- Internal trust-boundary assumptions the project already documents
+- Defense-in-depth ideas with no concrete attack path
+
+Output: a prioritized list — severity, file:line, the exploit path, the fix. If nothing is wrong, say so plainly.
+```
+
+- [ ] **Step 5: Write `explorer.md`**
+
+```markdown
+---
+name: explorer
+description: Fast codebase navigation — find files, search for patterns, answer "where/how" questions. Terse output.
+---
+
+You are an explorer. Your job is to find things in the codebase quickly and report back concisely.
+
+Use:
+- Glob/Grep for searches
+- Read only for files you need to quote from
+
+Do NOT:
+- Refactor, edit, or "improve" anything
+- Read files that aren't relevant to the question
+- Dump raw tool output — summarize
+
+Output style:
+- Lead with the answer in one sentence.
+- Back it up with file:line references.
+- If you found nothing, say "no match" and what you searched for.
+
+Keep responses short. The caller wants facts, not prose.
+```
+
+- [ ] **Step 6: Write `researcher.md`**
+
+```markdown
+---
+name: researcher
+description: General-purpose research and analysis for non-code tasks — summarize docs, investigate questions, draft prose.
+---
+
+You are a researcher. You handle tasks that don't fit the code-review/test/debug shape.
+
+Good fits:
+- Summarizing documents, specs, or long outputs
+- Investigating an open question (what does X do, how does Y work, what are the tradeoffs)
+- Drafting non-code text (release notes, emails, docs)
+- Analyzing structured data (logs, CSV, JSON) and reporting findings
+
+Process:
+1. Restate the task in one sentence so you know what "done" looks like.
+2. Gather just enough information — stop when you can answer, not when you run out of sources.
+3. Distinguish facts ("the file says X") from inference ("so likely Y").
+4. Cite sources (file:line, URL, log excerpt) for every claim.
+
+Output: direct answer first, supporting evidence second. Keep it short unless asked for depth.
+```
+
+- [ ] **Step 7: Commit**
+
+```bash
+git add src/ClaudeDo.Worker/DefaultAgents/
+git commit -m "feat(worker): add bundled default agent definitions"
+```
+
+---
+
+### Task 2: Wire bundled agents into build output
+
+**Files:**
+- Modify: `src/ClaudeDo.Worker/ClaudeDo.Worker.csproj`
+
+- [ ] **Step 1: Add Content item group for DefaultAgents**
+
+Edit `src/ClaudeDo.Worker/ClaudeDo.Worker.csproj`. After the existing `<ItemGroup>` blocks and before the final `<PropertyGroup>`, add:
+
+```xml
+  <ItemGroup>
+    <Content Include="DefaultAgents\*.md">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
+```
+
+- [ ] **Step 2: Build the worker and verify the files land in output**
+
+Run: `dotnet build src/ClaudeDo.Worker/ClaudeDo.Worker.csproj`
+Expected: build succeeds.
+
+Then verify output:
+
+Run: `ls src/ClaudeDo.Worker/bin/Debug/net8.0/DefaultAgents/`
+Expected: all 6 `.md` files present.
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add src/ClaudeDo.Worker/ClaudeDo.Worker.csproj
+git commit -m "build(worker): ship DefaultAgents folder in build output"
+```
+
+---
+
+### Task 3: Write DefaultAgentSeeder tests (failing)
+
+**Files:**
+- Create: `tests/ClaudeDo.Worker.Tests/Services/DefaultAgentSeederTests.cs`
+
+The service doesn't exist yet — these tests will fail to compile initially. That's fine; the next task implements it.
+
+- [ ] **Step 1: Write the test file**
+
+Create `tests/ClaudeDo.Worker.Tests/Services/DefaultAgentSeederTests.cs`:
+
+```csharp
+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")));
+    }
+}
+```
+
+- [ ] **Step 2: Run tests to confirm they fail to compile**
+
+Run: `dotnet test tests/ClaudeDo.Worker.Tests --filter "FullyQualifiedName~DefaultAgentSeederTests"`
+Expected: compile error — `The type or namespace name 'DefaultAgentSeeder' could not be found`.
+
+This confirms the tests target the not-yet-written service.
+
+---
+
+### Task 4: Implement DefaultAgentSeeder
+
+**Files:**
+- Create: `src/ClaudeDo.Worker/Services/DefaultAgentSeeder.cs`
+
+- [ ] **Step 1: Write the service**
+
+Create `src/ClaudeDo.Worker/Services/DefaultAgentSeeder.cs`:
+
+```csharp
+using Microsoft.Extensions.Logging;
+
+namespace ClaudeDo.Worker.Services;
+
+public sealed record SeedResult(int Copied, int Skipped);
+
+public sealed class DefaultAgentSeeder
+{
+    private readonly string _bundleDir;
+    private readonly string _targetDir;
+    private readonly ILogger<DefaultAgentSeeder>? _logger;
+
+    public DefaultAgentSeeder(string bundleDir, string targetDir, ILogger<DefaultAgentSeeder>? logger = null)
+    {
+        _bundleDir = bundleDir;
+        _targetDir = targetDir;
+        _logger = logger;
+    }
+
+    public async Task<SeedResult> SeedMissingAsync(CancellationToken ct = default)
+    {
+        if (!Directory.Exists(_bundleDir))
+        {
+            _logger?.LogWarning("DefaultAgents bundle dir not found: {Dir}", _bundleDir);
+            return new SeedResult(0, 0);
+        }
+
+        Directory.CreateDirectory(_targetDir);
+
+        int copied = 0;
+        int skipped = 0;
+
+        foreach (var src in Directory.EnumerateFiles(_bundleDir, "*.md"))
+        {
+            ct.ThrowIfCancellationRequested();
+            var fileName = Path.GetFileName(src);
+            var dst = Path.Combine(_targetDir, fileName);
+
+            if (File.Exists(dst))
+            {
+                skipped++;
+                continue;
+            }
+
+            try
+            {
+                using var input = File.OpenRead(src);
+                using var output = File.Create(dst);
+                await input.CopyToAsync(output, ct);
+                copied++;
+            }
+            catch (Exception ex)
+            {
+                _logger?.LogWarning(ex, "Failed to copy default agent {File}", fileName);
+            }
+        }
+
+        return new SeedResult(copied, skipped);
+    }
+}
+```
+
+- [ ] **Step 2: Run the tests and verify they pass**
+
+Run: `dotnet test tests/ClaudeDo.Worker.Tests --filter "FullyQualifiedName~DefaultAgentSeederTests"`
+Expected: 6 tests pass.
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add src/ClaudeDo.Worker/Services/DefaultAgentSeeder.cs tests/ClaudeDo.Worker.Tests/Services/DefaultAgentSeederTests.cs
+git commit -m "feat(worker): add DefaultAgentSeeder for first-launch agent seeding"
+```
+
+---
+
+### Task 5: Wire seeder into Worker startup
+
+**Files:**
+- Modify: `src/ClaudeDo.Worker/Program.cs`
+
+- [ ] **Step 1: Register seeder and run SeedMissingAsync at startup**
+
+In `src/ClaudeDo.Worker/Program.cs`, replace the "Agent file management." block (currently lines 36–39):
+
+Find:
+```csharp
+// Agent file management.
+var agentsDir = Path.Combine(ClaudeDo.Data.Paths.AppDataRoot(), "agents");
+Directory.CreateDirectory(agentsDir);
+builder.Services.AddSingleton(new AgentFileService(agentsDir));
+```
+
+Replace with:
+```csharp
+// Agent file management.
+var agentsDir = Path.Combine(ClaudeDo.Data.Paths.AppDataRoot(), "agents");
+Directory.CreateDirectory(agentsDir);
+builder.Services.AddSingleton(new AgentFileService(agentsDir));
+
+var defaultAgentsBundleDir = Path.Combine(AppContext.BaseDirectory, "DefaultAgents");
+builder.Services.AddSingleton(sp => new DefaultAgentSeeder(
+    defaultAgentsBundleDir,
+    agentsDir,
+    sp.GetService<Microsoft.Extensions.Logging.ILogger<DefaultAgentSeeder>>()));
+```
+
+Then, after `var app = builder.Build();` and before `app.MapHub<WorkerHub>("/hub");`, add:
+
+Find:
+```csharp
+using (var scope = app.Services.CreateScope())
+{
+    ClaudeDoDbContext.MigrateAndConfigure(
+        scope.ServiceProvider.GetRequiredService<ClaudeDoDbContext>());
+}
+
+app.MapHub<WorkerHub>("/hub");
+```
+
+Replace with:
+```csharp
+using (var scope = app.Services.CreateScope())
+{
+    ClaudeDoDbContext.MigrateAndConfigure(
+        scope.ServiceProvider.GetRequiredService<ClaudeDoDbContext>());
+}
+
+try
+{
+    var seeder = app.Services.GetRequiredService<DefaultAgentSeeder>();
+    var seedResult = await seeder.SeedMissingAsync();
+    app.Logger.LogInformation(
+        "Default agents seeded: {Copied} copied, {Skipped} already present",
+        seedResult.Copied, seedResult.Skipped);
+}
+catch (Exception ex)
+{
+    app.Logger.LogWarning(ex, "Default agent seeding failed");
+}
+
+app.MapHub<WorkerHub>("/hub");
+```
+
+- [ ] **Step 2: Build worker to verify compile**
+
+Run: `dotnet build src/ClaudeDo.Worker/ClaudeDo.Worker.csproj`
+Expected: build succeeds.
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add src/ClaudeDo.Worker/Program.cs
+git commit -m "feat(worker): seed default agents on startup"
+```
+
+---
+
+### Task 6: Add RestoreDefaultAgents hub method (TDD)
+
+**Files:**
+- Modify: `tests/ClaudeDo.Worker.Tests/Hub/AgentSettingsHubTests.cs`
+- Modify: `src/ClaudeDo.Worker/Hub/WorkerHub.cs`
+
+The existing `AgentSettingsHubTests` doesn't exercise `WorkerHub` directly (it tests the repository). We'll add a new test file that tests the seeder restore flow end-to-end without SignalR plumbing — constructing the seeder with temp dirs and asserting the `SeedResult` round-trip. This mirrors how the file is structured today and keeps tests simple.
+
+- [ ] **Step 1: Add a restore test**
+
+Add to `tests/ClaudeDo.Worker.Tests/Hub/AgentSettingsHubTests.cs`. Inside the existing `AgentSettingsHubTests` class (before the closing brace), add:
+
+```csharp
+    [Fact]
+    public async Task RestoreDefaultAgents_CopiesMissingBundledFiles()
+    {
+        var root = Path.Combine(Path.GetTempPath(), $"claudedo_hub_restore_{Guid.NewGuid():N}");
+        var bundleDir = Path.Combine(root, "bundle");
+        var targetDir = Path.Combine(root, "target");
+        try
+        {
+            Directory.CreateDirectory(bundleDir);
+            Directory.CreateDirectory(targetDir);
+            await File.WriteAllTextAsync(Path.Combine(bundleDir, "code-reviewer.md"), "body");
+
+            var seeder = new ClaudeDo.Worker.Services.DefaultAgentSeeder(bundleDir, targetDir);
+            var result = await seeder.SeedMissingAsync();
+
+            Assert.Equal(1, result.Copied);
+            Assert.Equal(0, result.Skipped);
+            Assert.True(File.Exists(Path.Combine(targetDir, "code-reviewer.md")));
+        }
+        finally
+        {
+            try { Directory.Delete(root, true); } catch { }
+        }
+    }
+```
+
+- [ ] **Step 2: Run the test to confirm it passes (seeder already exists)**
+
+Run: `dotnet test tests/ClaudeDo.Worker.Tests --filter "FullyQualifiedName~AgentSettingsHubTests.RestoreDefaultAgents_CopiesMissingBundledFiles"`
+Expected: 1 test passes.
+
+- [ ] **Step 3: Add RestoreDefaultAgents to WorkerHub**
+
+Edit `src/ClaudeDo.Worker/Hub/WorkerHub.cs`.
+
+Add a new DTO record near the top with the other DTOs (after the `ListConfigDto` line on line 30):
+
+```csharp
+public record SeedResultDto(int Copied, int Skipped);
+```
+
+Update the class field block. Find:
+```csharp
+    private readonly QueueService _queue;
+    private readonly AgentFileService _agentService;
+    private readonly HubBroadcaster _broadcaster;
+    private readonly IDbContextFactory<ClaudeDoDbContext> _dbFactory;
+    private readonly WorktreeMaintenanceService _wtMaintenance;
+    private readonly TaskResetService _resetService;
+    private readonly TaskMergeService _mergeService;
+```
+
+Replace with:
+```csharp
+    private readonly QueueService _queue;
+    private readonly AgentFileService _agentService;
+    private readonly DefaultAgentSeeder _seeder;
+    private readonly HubBroadcaster _broadcaster;
+    private readonly IDbContextFactory<ClaudeDoDbContext> _dbFactory;
+    private readonly WorktreeMaintenanceService _wtMaintenance;
+    private readonly TaskResetService _resetService;
+    private readonly TaskMergeService _mergeService;
+```
+
+Update the constructor. Find:
+```csharp
+    public WorkerHub(
+        QueueService queue,
+        AgentFileService agentService,
+        HubBroadcaster broadcaster,
+        IDbContextFactory<ClaudeDoDbContext> dbFactory,
+        WorktreeMaintenanceService wtMaintenance,
+        TaskResetService resetService,
+        TaskMergeService mergeService)
+    {
+        _queue = queue;
+        _agentService = agentService;
+        _broadcaster = broadcaster;
+        _dbFactory = dbFactory;
+        _wtMaintenance = wtMaintenance;
+        _resetService = resetService;
+        _mergeService = mergeService;
+    }
+```
+
+Replace with:
+```csharp
+    public WorkerHub(
+        QueueService queue,
+        AgentFileService agentService,
+        DefaultAgentSeeder seeder,
+        HubBroadcaster broadcaster,
+        IDbContextFactory<ClaudeDoDbContext> dbFactory,
+        WorktreeMaintenanceService wtMaintenance,
+        TaskResetService resetService,
+        TaskMergeService mergeService)
+    {
+        _queue = queue;
+        _agentService = agentService;
+        _seeder = seeder;
+        _broadcaster = broadcaster;
+        _dbFactory = dbFactory;
+        _wtMaintenance = wtMaintenance;
+        _resetService = resetService;
+        _mergeService = mergeService;
+    }
+```
+
+Then add the hub method. After the existing `RefreshAgents` method (currently line 126):
+
+```csharp
+    public async Task<SeedResultDto> RestoreDefaultAgents()
+    {
+        var result = await _seeder.SeedMissingAsync();
+        return new SeedResultDto(result.Copied, result.Skipped);
+    }
+```
+
+- [ ] **Step 4: Build worker to verify compile**
+
+Run: `dotnet build src/ClaudeDo.Worker/ClaudeDo.Worker.csproj`
+Expected: build succeeds.
+
+- [ ] **Step 5: Run all Worker tests to confirm no regressions**
+
+Run: `dotnet test tests/ClaudeDo.Worker.Tests`
+Expected: all tests pass.
+
+- [ ] **Step 6: Commit**
+
+```bash
+git add src/ClaudeDo.Worker/Hub/WorkerHub.cs tests/ClaudeDo.Worker.Tests/Hub/AgentSettingsHubTests.cs
+git commit -m "feat(worker): expose RestoreDefaultAgents hub method"
+```
+
+---
+
+### Task 7: Add RestoreDefaultAgentsAsync to WorkerClient
+
+**Files:**
+- Modify: `src/ClaudeDo.Ui/Services/WorkerClient.cs`
+
+- [ ] **Step 1: Add the DTO record**
+
+At the bottom of `src/ClaudeDo.Ui/Services/WorkerClient.cs`, alongside the other public record declarations (after `ListConfigDto`, currently line 350), add:
+
+```csharp
+public sealed record SeedResultDto(int Copied, int Skipped);
+```
+
+- [ ] **Step 2: Add the client method**
+
+In the `WorkerClient` class, after the `RefreshAgentsAsync` method (currently line 232), add:
+
+```csharp
+    public async Task<SeedResultDto?> RestoreDefaultAgentsAsync()
+    {
+        try
+        {
+            return await _hub.InvokeAsync<SeedResultDto>("RestoreDefaultAgents");
+        }
+        catch
+        {
+            return null;
+        }
+    }
+```
+
+- [ ] **Step 3: Build UI to verify compile**
+
+Run: `dotnet build src/ClaudeDo.Ui/ClaudeDo.Ui.csproj`
+Expected: build succeeds.
+
+- [ ] **Step 4: Commit**
+
+```bash
+git add src/ClaudeDo.Ui/Services/WorkerClient.cs
+git commit -m "feat(ui): add RestoreDefaultAgentsAsync to WorkerClient"
+```
+
+---
+
+### Task 8: Add restore button to Settings modal
+
+**Files:**
+- Modify: `src/ClaudeDo.Ui/ViewModels/Modals/SettingsModalViewModel.cs`
+- Modify: `src/ClaudeDo.Ui/Views/Modals/SettingsModalView.axaml`
+
+- [ ] **Step 1: Add the command to the viewmodel**
+
+In `src/ClaudeDo.Ui/ViewModels/Modals/SettingsModalViewModel.cs`, add a new command method. Place it after the existing `ConfirmResetAll` method (currently ending line 162), before the `OpenPath` method:
+
+```csharp
+    [RelayCommand]
+    private async Task RestoreDefaultAgents()
+    {
+        IsBusy = true;
+        StatusMessage = "";
+        try
+        {
+            var result = await _worker.RestoreDefaultAgentsAsync();
+            if (result is null)
+                StatusMessage = "Worker offline.";
+            else if (result.Copied == 0 && result.Skipped == 0)
+                StatusMessage = "No default agents bundled.";
+            else if (result.Copied == 0)
+                StatusMessage = "All default agents already present.";
+            else
+                StatusMessage = $"Restored {result.Copied} default agent(s).";
+
+            await _worker.RefreshAgentsAsync();
+        }
+        catch (Exception ex)
+        {
+            StatusMessage = $"Restore failed: {ex.Message}";
+        }
+        finally { IsBusy = false; }
+    }
+```
+
+- [ ] **Step 2: Add a button to the settings view**
+
+Edit `src/ClaudeDo.Ui/Views/Modals/SettingsModalView.axaml`. Add a new section after the `WORKTREES` StackPanel block (which ends with `</StackPanel>` around line 185) and before the `ABOUT` section (`<!-- ABOUT -->` around line 187).
+
+Find:
+```xml
+          </StackPanel>
+
+          <!-- ABOUT -->
+```
+
+Replace with:
+```xml
+          </StackPanel>
+
+          <!-- AGENTS -->
+          <StackPanel Spacing="0">
+            <TextBlock Classes="section-label" Text="AGENTS"/>
+            <Border Classes="section">
+              <StackPanel Spacing="8">
+                <TextBlock Text="Restore bundled default agents (code-reviewer, test-writer, debugger, security-reviewer, explorer, researcher). Existing files are not overwritten."
+                           FontSize="11"
+                           TextWrapping="Wrap"
+                           Foreground="{DynamicResource TextDimBrush}"/>
+                <Button Content="Restore default agents"
+                        Command="{Binding RestoreDefaultAgentsCommand}"
+                        IsEnabled="{Binding !IsBusy}"
+                        HorizontalAlignment="Left"/>
+              </StackPanel>
+            </Border>
+          </StackPanel>
+
+          <!-- ABOUT -->
+```
+
+- [ ] **Step 3: Build UI to verify compile**
+
+Run: `dotnet build src/ClaudeDo.Ui/ClaudeDo.Ui.csproj`
+Expected: build succeeds.
+
+- [ ] **Step 4: Manual smoke test**
+
+Start the worker and the UI. Open Settings (3-dots next to username). The AGENTS section should appear with a "Restore default agents" button.
+
+1. With `~/.todo-app/agents/` empty (delete any existing `.md` files first, back them up if needed): click the button. Status should read "Restored N default agent(s)." The files should appear in the folder.
+2. Click again. Status should read "All default agents already present."
+3. Modify one of the restored files. Click restore. The modified file content should be preserved.
+
+If any step fails, stop and fix before committing.
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/ClaudeDo.Ui/ViewModels/Modals/SettingsModalViewModel.cs src/ClaudeDo.Ui/Views/Modals/SettingsModalView.axaml
+git commit -m "feat(ui): add Restore default agents button to Settings modal"
+```
+
+---
+
+## Verification
+
+At the end, run the full test suite and build all projects:
+
+```bash
+dotnet build src/ClaudeDo.Worker/ClaudeDo.Worker.csproj
+dotnet build src/ClaudeDo.Ui/ClaudeDo.Ui.csproj
+dotnet build src/ClaudeDo.Data/ClaudeDo.Data.csproj
+dotnet test tests/ClaudeDo.Worker.Tests
+```
+
+Expected: all builds succeed, all tests pass.
+
+Additionally, start the Worker once with an empty `~/.todo-app/agents/` folder and confirm the log line:
+> `Default agents seeded: 6 copied, 0 already present`
+
+Then confirm `~/.todo-app/agents/` contains all 6 markdown files.