feat: complete Nexus mission-control workflows

README.md

@@ -174,6 +174,63 @@ Legacy ModuleView routes (not standalone, rendered through `ModuleView.vue`):
 
 ## API endpoints
 
+### MCP Agent Data Plane
+
+Nexus exposes an MCP endpoint at `/mcp` for agent-facing board operations.
+It uses the official `ModelContextProtocol.AspNetCore` SDK with stateless
+streamable HTTP transport. Tools are a thin facade over `ITaskBridgeService`;
+they must not duplicate board business logic.
+
+Auth follows the bridge rules: requests provide `X-Agent-Id` and/or
+`X-Nexus-Api-Key`. Secrets stay in OpenClaw/Gateway config and are never
+embedded in frontend code.
+
+Registered tools:
+
+| Tool | Purpose |
+|---|---|
+| `nexus_get_board` | Full task board |
+| `nexus_agent_overview` | Waiting/stale workflow overview |
+| `nexus_get_task` | Single task |
+| `nexus_get_children` | Child tasks for a parent |
+| `nexus_get_activity` | Task activity history |
+| `nexus_create_task` | Create parent/standalone task |
+| `nexus_create_child_task` | Create visible delegation child task |
+| `nexus_update_status` | Update status using the canonical enum only |
+| `nexus_append_activity` | Append checkpoint/activity |
+| `nexus_handoff` | Handoff to a known agent |
+
+The compatible `/api/bridge` HTTP facade remains available for internal
+diagnostics and transition clients. New agent integrations should use MCP;
+`/api/dashboard` is UI/admin surface, not an agent contract.
+
+### Mission Control Gateway Plane
+
+Nexus keeps the Browser -> Nexus -> OpenClaw boundary: the frontend never talks
+to OpenClaw directly. Read-only Gateway status is exposed through
+`GET /api/dashboard/gateway`; it reports reachability, discovered Gateway
+version and the optional `Integrations:OpenClaw:RequiredVersion` pin. A set pin
+does not mutate production config, but makes protocol drift visible in the UI.
+
+Agent activity shown as "Thinking" is redacted before display. Lines containing
+token, password, bearer, authorization, API key or secret markers are replaced
+with a redaction marker. Persisted audit-worthy events should be written as
+short Activity entries, not raw session transcripts.
+
+Nexus activity updates stream live through the Dashboard SSE channel and are
+filtered by explicit `agentIds`. Gateway session history is read-only fallback
+data: it is fetched on demand, redacted before display and not persisted as a
+long-term raw transcript. Agent "Now" and "Today" summaries are deterministic
+derivations from redacted Nexus activity plus redacted Gateway history; Nexus
+does not call an LLM to summarize this feed.
+
+Config writes and approval actions are owner-only. Config saves validate before
+replacement, keep a `.bak` when an existing file is replaced, write audit events
+without file contents or secrets and return structured `validation`, `backup`
+and `reloadCheck` results. Workspace Markdown hot reload is currently reported
+truthfully as `not_supported`; JSON validation exists in the save path but JSON
+files are not exposed unless they are explicitly allowlisted for editing.
+
 ### Backend Bridge (Agent-zu-Backend, NICHT Frontend)
 
 Der `/api/bridge/` Pfad ist ein strukturierter MCP-artiger Kommando-Adapter für die
@@ -250,11 +307,11 @@ The Task Board now models OpenClaw delegation as a visible parent/child flow:
 |---|---|---|
 | `GET` | `/api/v1/tasks` | List all tasks |
 | `POST` | `/api/v1/tasks` | Create task |
-| `GET` | `/api/v1/tasks/pending-approval` | Tasks in progress older than 1 hour |
+| `GET` | `/api/v1/tasks/pending-approval` | Owner-only pending approvals |
 | `PATCH` | `/api/v1/tasks/{id}` | Update task (title, priority, projectId) |
 | `PATCH` | `/api/v1/tasks/{id}/state` | Update task state |
-| `POST` | `/api/v1/tasks/{id}/approve` | Approve task (in-progress → done) |
-| `POST` | `/api/v1/tasks/{id}/reject` | Reject task (in-progress → backlog) |
+| `POST` | `/api/v1/tasks/{id}/approve` | Owner-only approve task (in-progress -> done) |
+| `POST` | `/api/v1/tasks/{id}/reject` | Owner-only reject task (in-progress -> backlog) |
 | `DELETE` | `/api/v1/tasks/{id}` | Delete task (only done/backlog states) |
 
 ### Agents
@@ -264,10 +321,11 @@ The Task Board now models OpenClaw delegation as a visible parent/child flow:
 | `GET` | `/api/v1/agents` | List all agents |
 | `GET` | `/api/v1/agents/{id}` | Agent detail (with sub-agents, identity) |
 | `GET` | `/api/v1/agents/{id}/activity` | Agent-specific activity (last 50) |
+| `GET` | `/api/v1/agents/{id}/summary` | Redacted deterministic Now/Today summary |
 | `POST` | `/api/v1/agents/{id}/command` | Send command to agent |
 | `GET` | `/api/v1/agents/{id}/config` | List agent config files (IDENTITY.md, SOUL.md, etc.) |
 | `GET` | `/api/v1/agents/{id}/config/{fileName}` | Read config file content |
-| `PUT` | `/api/v1/agents/{id}/config/{fileName}` | Save config file (atomic write) |
+| `PUT` | `/api/v1/agents/{id}/config/{fileName}` | Owner-only validated config save with backup/audit/reload result |
 
 ### Memory & Docs
 

backend-tests/MissionControlPhaseTests.cs

@@ -0,0 +1,496 @@
+using System.Reflection;
+using System.Security.Claims;
+using System.Text;
+using System.Text.Json;
+using Microsoft.AspNetCore.Http;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Configuration;
+using Nexus.Api.Data;
+using Nexus.Api.Controllers;
+using Nexus.Api.DTOs;
+using Nexus.Api.Models;
+using Nexus.Api.Repositories;
+using Nexus.Api.Services;
+using Xunit;
+
+namespace Nexus.Api.Tests;
+
+public sealed class MissionControlPhaseTests
+{
+    [Fact]
+    public void AgentConfigSave_IsBaoOwnerOnly()
+    {
+        var method = typeof(AgentsController).GetMethod(nameof(AgentsController.SaveConfigFile), BindingFlags.Instance | BindingFlags.Public);
+
+        Assert.NotNull(method);
+        var authorize = method!.GetCustomAttribute<AuthorizeAttribute>();
+        Assert.NotNull(authorize);
+        Assert.Equal("owner", authorize!.Roles);
+    }
+
+    [Fact]
+    public void TaskApprovalEndpoints_AreOwnerOnly()
+    {
+        var pending = typeof(TasksController).GetMethod(nameof(TasksController.GetPendingApproval), BindingFlags.Instance | BindingFlags.Public);
+        var approve = typeof(TasksController).GetMethod(nameof(TasksController.Approve), BindingFlags.Instance | BindingFlags.Public);
+        var reject = typeof(TasksController).GetMethod(nameof(TasksController.Reject), BindingFlags.Instance | BindingFlags.Public);
+
+        Assert.Equal("owner", pending!.GetCustomAttribute<AuthorizeAttribute>()?.Roles);
+        Assert.Equal("owner", approve!.GetCustomAttribute<AuthorizeAttribute>()?.Roles);
+        Assert.Equal("owner", reject!.GetCustomAttribute<AuthorizeAttribute>()?.Roles);
+    }
+
+    [Fact]
+    public void GatewayActivityRedaction_RemovesSensitiveLines()
+    {
+        var text = OpenClawGatewayClient.RedactSensitiveText("""
+            Status: ok
+            Authorization: Bearer abc.def.ghi
+            Next step ready
+            X-Nexus-Api-Key: secret
+            """);
+
+        Assert.Contains("Status: ok", text);
+        Assert.Contains("Next step ready", text);
+        Assert.DoesNotContain("Bearer abc", text);
+        Assert.DoesNotContain("secret", text);
+        Assert.Equal(2, text.Split("[redacted sensitive line]").Length - 1);
+    }
+
+    [Fact]
+    public void AgentSummaryBuilder_ProducesStructuredNowAndTodaySummary()
+    {
+        var now = DateTimeOffset.UtcNow;
+        var activity = new[]
+        {
+            new ActivityEvent
+            {
+                Type = "agent_task",
+                Message = "programmer completed repo scan",
+                CreatedAt = now.AddHours(-3)
+            }
+        };
+
+        var gateway = new[]
+        {
+            new AgentActivityEntry("5m ago", "Authorization: Bearer hidden\nWorking on redaction", now.AddMinutes(-5)),
+            new AgentActivityEntry("20m ago", "Checking task mapping", now.AddMinutes(-20))
+        };
+
+        var summary = AgentSummaryBuilder.Build(activity, gateway, now);
+
+        Assert.Equal("gateway-session-history", summary.Now.Source);
+        Assert.Equal(now.AddMinutes(-5), summary.Now.Timestamp);
+        Assert.DoesNotContain("Bearer hidden", summary.Now.Text);
+        Assert.Contains("Working on redaction", summary.Now.Text);
+        Assert.Equal("derived-mixed", summary.Today.Source);
+        Assert.Equal(now.AddMinutes(-5), summary.Today.Timestamp);
+        Assert.Contains("Working on redaction", summary.Today.Text);
+        Assert.Contains("Checking task mapping", summary.Today.Text);
+        Assert.Contains("programmer completed repo scan", summary.Today.Text);
+    }
+
+    [Fact]
+    public async Task ActivityRepository_RedactsBeforePersistenceAndPublishesAgentIds()
+    {
+        var options = new DbContextOptionsBuilder<NexusDbContext>()
+            .UseInMemoryDatabase(Guid.NewGuid().ToString())
+            .Options;
+
+        await using var db = new NexusDbContext(options);
+        await db.Database.EnsureCreatedAsync();
+
+        var liveUpdates = new LiveUpdateService();
+        var subscription = await liveUpdates.SubscribeAsync();
+        var repository = new ActivityRepository(db, liveUpdates);
+
+        await repository.AddAsync(new ActivityEvent
+        {
+            Type = "agent",
+            Message = "Command sent to agent programmer: Authorization: Bearer secret-token"
+        });
+
+        var stored = await repository.GetRecentAsync(1);
+        Assert.Single(stored);
+        Assert.DoesNotContain("secret-token", stored[0].Message);
+        Assert.Contains("programmer", stored[0].Message);
+        Assert.Contains("Authorization: Bearer [redacted]", stored[0].Message);
+
+        var envelope = await subscription.Reader.ReadAsync();
+        Assert.Equal("activity.created", envelope.Type);
+
+        var payloadJson = JsonSerializer.Serialize(envelope.Payload);
+        using var doc = JsonDocument.Parse(payloadJson);
+        Assert.Equal("agent", doc.RootElement.GetProperty("Type").GetString());
+        Assert.DoesNotContain("secret-token", doc.RootElement.GetProperty("Message").GetString());
+        var agentIds = doc.RootElement.GetProperty("agentIds").EnumerateArray().Select(x => x.GetString()).ToArray();
+        Assert.Contains("programmer", agentIds);
+    }
+
+    [Fact]
+    public async Task ActivityRepository_GetByAgentAsync_UsesMappedAgentIds()
+    {
+        var options = new DbContextOptionsBuilder<NexusDbContext>()
+            .UseInMemoryDatabase(Guid.NewGuid().ToString())
+            .Options;
+
+        await using var db = new NexusDbContext(options);
+        await db.Database.EnsureCreatedAsync();
+
+        var repository = new ActivityRepository(db, new LiveUpdateService());
+        await repository.AddAsync(new ActivityEvent
+        {
+            Type = "agent",
+            Message = "Command sent to agent programmer: compile module"
+        });
+        await repository.AddAsync(new ActivityEvent
+        {
+            Type = "agent",
+            Message = "Command sent to agent reviewer: inspect module"
+        });
+
+        var programmerEvents = await repository.GetByAgentAsync("programmer", 10);
+
+        Assert.Single(programmerEvents);
+        Assert.True(programmerEvents[0].Message.Contains("programmer", StringComparison.OrdinalIgnoreCase));
+        Assert.False(programmerEvents[0].Message.Contains("reviewer", StringComparison.OrdinalIgnoreCase));
+    }
+
+    [Fact]
+    public async Task GatewayInfo_ReportsVersionDrift()
+    {
+        var client = CreateClient(_ => new HttpResponseMessage(System.Net.HttpStatusCode.OK)
+        {
+            Content = new StringContent("""{"version":"2026.07.08"}""", Encoding.UTF8, "application/json")
+        }, requiredVersion: "2026.07.09");
+
+        var info = await client.GetGatewayInfoAsync();
+
+        Assert.True(info.Reachable);
+        Assert.Equal("2026.07.08", info.Version);
+        Assert.Equal("2026.07.09", info.RequiredVersion);
+        Assert.Equal("drift", info.VersionStatus);
+        Assert.False(info.VersionMatches);
+        Assert.NotNull(info.Warning);
+        Assert.Contains("2026.07.08", info.Warning!);
+    }
+
+    [Fact]
+    public async Task GatewayInfo_ReportsMissingVersionWhenPinned()
+    {
+        var client = CreateClient(_ => new HttpResponseMessage(System.Net.HttpStatusCode.OK)
+        {
+            Content = new StringContent("""{"status":"ok"}""", Encoding.UTF8, "application/json")
+        }, requiredVersion: "2026.07.09");
+
+        var info = await client.GetGatewayInfoAsync();
+
+        Assert.True(info.Reachable);
+        Assert.Null(info.Version);
+        Assert.Equal("missing", info.VersionStatus);
+        Assert.False(info.VersionMatches);
+        Assert.NotNull(info.Warning);
+        Assert.Contains("2026.07.09", info.Warning!);
+    }
+
+    [Fact]
+    public async Task GatewayInfo_ReportsMatchedPinnedVersion()
+    {
+        var client = CreateClient(request =>
+        {
+            var response = new HttpResponseMessage(System.Net.HttpStatusCode.OK)
+            {
+                Content = new StringContent("""{"status":"ok"}""", Encoding.UTF8, "application/json")
+            };
+            response.Headers.Add("X-OpenClaw-Version", "2026.07.09");
+            return response;
+        }, requiredVersion: "2026.07.09");
+
+        var info = await client.GetGatewayInfoAsync();
+
+        Assert.True(info.Reachable);
+        Assert.Equal("matched", info.VersionStatus);
+        Assert.True(info.VersionMatches);
+        Assert.Null(info.Warning);
+    }
+
+    [Fact]
+    public async Task GetAgentsAsync_MapsRuntimeStatesFromGatewayStatus()
+    {
+        var staleTimestamp = DateTimeOffset.UtcNow.AddMinutes(-40).ToString("o");
+        var client = CreateClient(request =>
+        {
+            if (request.RequestUri?.AbsolutePath == "/tools/invoke")
+            {
+                using var doc = JsonDocument.Parse(request.Content!.ReadAsStringAsync().GetAwaiter().GetResult());
+                var agentId = doc.RootElement.GetProperty("args").GetProperty("sessionKey").GetString()!
+                    .Split(':', StringSplitOptions.RemoveEmptyEntries)[1];
+
+                object status = agentId switch
+                {
+                    "iris" => new { status = "active", isActive = true, currentTask = "Coordinate launch", model = "openai/gpt-5.5" },
+                    "programmer" => new { status = "idle", lastActivity = staleTimestamp, model = "openai/gpt-5.4" },
+                    "reviewer" => new { status = "failed", error = "gateway timeout", model = "openai/gpt-5.5" },
+                    "architekt" => new { status = "unsupported", message = "tool not available", model = "openai/gpt-5.5" },
+                    _ => new { status = "ready", model = "openai/gpt-5.5" }
+                };
+
+                return ToolResult(status);
+            }
+
+            return new HttpResponseMessage(System.Net.HttpStatusCode.NotFound);
+        }, agentIds: ["iris", "programmer", "reviewer", "architekt"]);
+
+        var agents = await client.GetAgentsAsync();
+
+        Assert.Collection(agents.OrderBy(a => a.Id),
+            architekt =>
+            {
+                Assert.Equal("architekt", architekt.Id);
+                Assert.Equal("unsupported", architekt.StatusKind);
+                Assert.Equal("Unsupported", architekt.StatusLabel);
+                Assert.Equal("tool not available", architekt.StatusDetail);
+            },
+            iris =>
+            {
+                Assert.Equal("iris", iris.Id);
+                Assert.Equal("connected", iris.StatusKind);
+                Assert.Equal("Arbeitet", iris.StatusLabel);
+            },
+            programmer =>
+            {
+                Assert.Equal("programmer", programmer.Id);
+                Assert.Equal("stale", programmer.StatusKind);
+                Assert.Equal("Stale", programmer.StatusLabel);
+                Assert.NotNull(programmer.StatusDetail);
+                Assert.Contains("40m", programmer.StatusDetail!);
+            },
+            reviewer =>
+            {
+                Assert.Equal("reviewer", reviewer.Id);
+                Assert.Equal("error", reviewer.StatusKind);
+                Assert.Equal("Fehler", reviewer.StatusLabel);
+                Assert.Equal("gateway timeout", reviewer.StatusDetail);
+            });
+    }
+
+    [Fact]
+    public async Task AgentConfigService_RejectsNullBytesBeforeReplacingFile()
+    {
+        var agentId = $"phase-p4-{Guid.NewGuid():N}";
+        var workspacePath = Path.Combine("/mnt", $"workspace-{agentId}");
+        Directory.CreateDirectory(workspacePath);
+        var configPath = Path.Combine(workspacePath, "TOOLS.md");
+        await File.WriteAllTextAsync(configPath, "original");
+
+        try
+        {
+            var service = new AgentConfigService();
+            var attempt = await service.SaveConfigFileAsync(agentId, "TOOLS.md", "bad\0content");
+
+            Assert.NotNull(attempt.Failure);
+            Assert.Equal("validation_failed", attempt.Failure!.Code);
+            Assert.Equal("failed", attempt.Failure.Validation.Status);
+            Assert.Contains(attempt.Failure.Validation.Errors, error => error.Contains("null bytes", StringComparison.OrdinalIgnoreCase));
+            Assert.Equal("original", await File.ReadAllTextAsync(configPath));
+        }
+        finally
+        {
+            Directory.Delete(workspacePath, recursive: true);
+        }
+    }
+
+    [Fact]
+    public async Task AgentConfigService_ReturnsBackupAndReloadShape_OnSuccessfulSave()
+    {
+        var agentId = $"phase-p4-{Guid.NewGuid():N}";
+        var workspacePath = Path.Combine("/mnt", $"workspace-{agentId}");
+        Directory.CreateDirectory(workspacePath);
+        var configPath = Path.Combine(workspacePath, "TOOLS.md");
+        await File.WriteAllTextAsync(configPath, "before");
+
+        try
+        {
+            var service = new AgentConfigService();
+            var attempt = await service.SaveConfigFileAsync(agentId, "TOOLS.md", "after");
+
+            Assert.NotNull(attempt.SaveResult);
+            var result = attempt.SaveResult!;
+            Assert.Equal("passed", result.Validation.Status);
+            Assert.Equal("markdown", result.Validation.FileKind);
+            Assert.Equal("created", result.Backup.Status);
+            Assert.True(result.Backup.BackupCreated);
+            Assert.Equal("not_supported", result.ReloadCheck.Status);
+            Assert.False(string.IsNullOrWhiteSpace(result.ReloadCheck.Message));
+            Assert.Equal("before", await File.ReadAllTextAsync(configPath + ".bak"));
+            Assert.Equal("after", await File.ReadAllTextAsync(configPath));
+        }
+        finally
+        {
+            Directory.Delete(workspacePath, recursive: true);
+        }
+    }
+
+    [Fact]
+    public async Task AgentConfigSave_AuditsFailureWithoutLeakingContent()
+    {
+        var configService = new FakeAgentConfigService(new AgentConfigSaveAttempt(
+            null,
+            new AgentConfigSaveFailure(
+                "validation_failed",
+                new AgentConfigValidationResult("failed", "markdown", ["Content contains null bytes."]),
+                new AgentConfigBackupResult("not_applicable", false),
+                new AgentConfigReloadCheckResult("not_supported", "No hot reload available."))));
+        var activityRepo = new CapturingActivityRepository();
+
+        var controller = new AgentsController(
+            new FakeAgentService(),
+            new FakeAgentRuntime(),
+            activityRepo,
+            configService,
+            new FakeDashboardService(),
+            Microsoft.Extensions.Logging.Abstractions.NullLogger<AgentsController>.Instance)
+        {
+            ControllerContext = new ControllerContext
+            {
+                HttpContext = new DefaultHttpContext
+                {
+                    User = new ClaimsPrincipal(new ClaimsIdentity(
+                    [
+                        new Claim(ClaimTypes.NameIdentifier, "bao"),
+                        new Claim(ClaimTypes.Role, "owner")
+                    ], "TestAuth"))
+                }
+            }
+        };
+
+        var result = await controller.SaveConfigFile("programmer", "TOOLS.md", new SaveConfigRequest("secret\0payload"), CancellationToken.None);
+
+        var statusResult = Assert.IsAssignableFrom<IStatusCodeHttpResult>(result);
+        Assert.Equal(StatusCodes.Status400BadRequest, statusResult.StatusCode);
+        var audit = Assert.Single(activityRepo.Added);
+        Assert.Equal("config_audit", audit.Type);
+        Assert.Contains("validation=failed", audit.Message);
+        Assert.DoesNotContain("secret", audit.Message, StringComparison.OrdinalIgnoreCase);
+        Assert.DoesNotContain("payload", audit.Message, StringComparison.OrdinalIgnoreCase);
+    }
+
+    private static OpenClawGatewayClient CreateClient(
+        Func<HttpRequestMessage, HttpResponseMessage> responder,
+        string? requiredVersion = null,
+        string[]? agentIds = null)
+    {
+        var configValues = new Dictionary<string, string?>
+        {
+            ["Integrations:OpenClaw:RequiredVersion"] = requiredVersion
+        };
+
+        if (agentIds is not null)
+        {
+            var configPath = Path.GetTempFileName();
+            File.WriteAllText(configPath, JsonSerializer.Serialize(new
+            {
+                agents = new
+                {
+                    list = agentIds.Select(id => new { id }).ToArray()
+                }
+            }));
+            configValues["AgentConfigPath"] = configPath;
+        }
+
+        var configuration = new ConfigurationBuilder()
+            .AddInMemoryCollection(configValues)
+            .Build();
+
+        var httpClient = new HttpClient(new StubHttpMessageHandler(responder))
+        {
+            BaseAddress = new Uri("http://gateway.local")
+        };
+
+        return new OpenClawGatewayClient(httpClient, configuration);
+    }
+
+    private static HttpResponseMessage ToolResult(object payload)
+        => new(System.Net.HttpStatusCode.OK)
+        {
+            Content = new StringContent(
+                JsonSerializer.Serialize(new { ok = true, result = payload }),
+                Encoding.UTF8,
+                "application/json")
+        };
+}
+
+file sealed class StubHttpMessageHandler(Func<HttpRequestMessage, HttpResponseMessage> responder) : HttpMessageHandler
+{
+    protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
+        => Task.FromResult(responder(request));
+}
+
+file sealed class FakeAgentConfigService(AgentConfigSaveAttempt attempt) : IAgentConfigService
+{
+    public IReadOnlyList<AgentConfigFileInfo> GetConfigFiles(string agentId) => [];
+
+    public Task<AgentConfigFileContent?> GetConfigFileAsync(string agentId, string fileName, CancellationToken ct = default)
+        => Task.FromResult<AgentConfigFileContent?>(null);
+
+    public Task<AgentConfigSaveAttempt> SaveConfigFileAsync(string agentId, string fileName, string content, CancellationToken ct = default)
+        => Task.FromResult(attempt);
+}
+
+file sealed class CapturingActivityRepository : IActivityRepository
+{
+    public List<ActivityEvent> Added { get; } = [];
+
+    public Task<List<ActivityEvent>> GetRecentAsync(int take, CancellationToken ct = default) => Task.FromResult(new List<ActivityEvent>());
+    public Task<List<ActivityEvent>> GetRecentForTasksAsync(IEnumerable<Guid> taskIds, CancellationToken ct = default) => Task.FromResult(new List<ActivityEvent>());
+    public Task<(List<ActivityEvent> Items, int TotalCount)> GetPagedAsync(string? type, string? sort, int page, int pageSize, CancellationToken ct = default)
+        => Task.FromResult((new List<ActivityEvent>(), 0));
+    public Task<List<ActivityEvent>> GetByAgentAsync(string agentId, int take, CancellationToken ct = default) => Task.FromResult(new List<ActivityEvent>());
+    public Task<ActivityEvent> AddAsync(ActivityEvent activity, CancellationToken ct = default)
+    {
+        Added.Add(activity);
+        return Task.FromResult(activity);
+    }
+}
+
+file sealed class FakeAgentService : IAgentService
+{
+    public Task<IReadOnlyCollection<AgentInfo>> GetAgentsAsync(CancellationToken cancellationToken)
+        => Task.FromResult<IReadOnlyCollection<AgentInfo>>([]);
+
+    public Task<AgentDetail?> GetAgentAsync(string id, CancellationToken cancellationToken)
+        => Task.FromResult<AgentDetail?>(null);
+
+    public Task<IReadOnlySet<string>> GetAllowedAgentIdsAsync(CancellationToken cancellationToken)
+        => Task.FromResult<IReadOnlySet<string>>(new HashSet<string>(StringComparer.OrdinalIgnoreCase) { "iris", "bao", "programmer" });
+}
+
+file sealed class FakeAgentRuntime : Nexus.Api.Integrations.IAgentRuntime
+{
+    public string Name => "fake";
+
+    public Task<Nexus.Api.Integrations.AgentRuntimeStatus> GetStatusAsync(CancellationToken cancellationToken)
+        => Task.FromResult(new Nexus.Api.Integrations.AgentRuntimeStatus("fake", OperationalStatus.Online, TimeSpan.Zero, null));
+
+    public Task<Nexus.Api.Integrations.AgentChatResult> ChatAsync(string message, string conversationId, string agentId, CancellationToken cancellationToken)
+        => Task.FromResult(new Nexus.Api.Integrations.AgentChatResult("fake", agentId, conversationId, "ok"));
+}
+
+file sealed class FakeDashboardService : IDashboardService
+{
+    public Task<DashboardStatus> GetStatusAsync() => Task.FromResult(new DashboardStatus(true, "online", 1, 0));
+    public Task<List<DashboardAgentInfo>> GetAgentsAsync() => Task.FromResult(new List<DashboardAgentInfo>());
+    public Task<List<FeedEntry>> GetOperationsAsync(int limit, string? agentFilter) => Task.FromResult(new List<FeedEntry>());
+    public Task<ChatResponse> SendChatAsync(string agentId, string message) => Task.FromResult(new ChatResponse(true, "", null));
+    public Task<List<MessageEntry>> GetMessagesAsync(string? sessionKey, int limit, int offset) => Task.FromResult(new List<MessageEntry>());
+    public Task<List<QueueItem>> GetQueueAsync(CancellationToken ct) => Task.FromResult(new List<QueueItem>());
+    public Task<GatewayRuntimeInfo> GetGatewayInfoAsync(CancellationToken ct) => Task.FromResult(new GatewayRuntimeInfo(true, "http://gateway", "test", "test", true, true, "matched", DateTimeOffset.UtcNow, "ok"));
+    public Task<QueueDeleteResult> DeleteQueueItemAsync(string id, string? source, CancellationToken ct) => Task.FromResult(new QueueDeleteResult(QueueDeleteOutcome.Ignored));
+    public Task<QueuePriorityResult> CycleQueuePriorityAsync(string id, CancellationToken ct) => Task.FromResult(new QueuePriorityResult(QueuePriorityOutcome.Ignored));
+    public Task<AgentModelInfo?> GetAgentModelAsync(string agentId) => Task.FromResult<AgentModelInfo?>(null);
+    public Task<bool> SetAgentModelAsync(string agentId, string model) => Task.FromResult(false);
+    public Task<List<AgentActivityEntry>> GetAgentActivityAsync(string agentId, int limit) => Task.FromResult(new List<AgentActivityEntry>());
+    public List<ModelOption> GetAvailableModels() => [];
+}

backend-tests/NexusMcpToolsTests.cs

@@ -0,0 +1,149 @@
+using Microsoft.Extensions.Logging.Abstractions;
+using ModelContextProtocol.Server;
+using Nexus.Api.Controllers;
+using Nexus.Api.Data;
+using Nexus.Api.Models;
+using Nexus.Api.Services;
+using Xunit;
+
+namespace Nexus.Api.Tests;
+
+public sealed class NexusMcpToolsTests
+{
+    [Fact]
+    public void NexusMcpTools_RegistersExpectedToolNames()
+    {
+        var toolNames = typeof(NexusMcpTools)
+            .GetMethods()
+            .Select(method => method.GetCustomAttributes(typeof(McpServerToolAttribute), inherit: false)
+                .OfType<McpServerToolAttribute>()
+                .FirstOrDefault())
+            .Where(attribute => attribute is not null)
+            .Select(attribute => attribute!.Name ?? string.Empty)
+            .Order()
+            .ToArray();
+
+        Assert.Equal(
+        [
+            "nexus_agent_overview",
+            "nexus_append_activity",
+            "nexus_create_child_task",
+            "nexus_create_task",
+            "nexus_get_activity",
+            "nexus_get_board",
+            "nexus_get_children",
+            "nexus_get_task",
+            "nexus_handoff",
+            "nexus_update_status"
+        ], toolNames);
+    }
+
+    [Fact]
+    public void NexusMcpTaskState_OnlyContainsCanonicalStates()
+    {
+        Assert.Equal(
+        [
+            nameof(NexusMcpTaskState.Backlog),
+            nameof(NexusMcpTaskState.InProgress),
+            nameof(NexusMcpTaskState.Blocked),
+            nameof(NexusMcpTaskState.Done),
+            nameof(NexusMcpTaskState.Review)
+        ], Enum.GetNames<NexusMcpTaskState>());
+
+        Assert.DoesNotContain("Delegated", Enum.GetNames<NexusMcpTaskState>());
+    }
+
+    [Fact]
+    public async Task McpTools_ReadAndWrite_UseBridgeService()
+    {
+        await using var fixture = await TaskWorkflowFixture.CreateAsync();
+        fixture.SetCallerAgent("iris");
+        var tools = CreateTools(fixture);
+
+        var createResult = await tools.CreateTask(
+            title: "MCP parent",
+            detail: "Created through MCP tool facade",
+            priority: "High",
+            assignedTo: "iris",
+            ct: CancellationToken.None);
+
+        Assert.True(createResult.Ok);
+        Assert.NotNull(createResult.Data);
+        Assert.Equal("MCP parent", createResult.Data!.Title);
+
+        var activityResult = await tools.AppendActivity(
+            createResult.Data.Id,
+            "MCP checkpoint",
+            "comment",
+            CancellationToken.None);
+
+        Assert.True(activityResult.Ok);
+        Assert.Equal("MCP checkpoint", activityResult.Data!.Message);
+
+        var statusResult = await tools.UpdateStatus(
+            createResult.Data.Id,
+            NexusMcpTaskState.InProgress,
+            CancellationToken.None);
+
+        Assert.True(statusResult.Ok);
+        Assert.Equal(TaskStateHelper.ToStateString(TaskState.InProgress), statusResult.Data!.State);
+
+        var board = await tools.GetBoard(CancellationToken.None);
+        Assert.Contains(board.InProgress, task => task.Id == createResult.Data.Id);
+
+        var taskResult = await tools.GetTask(createResult.Data.Id, CancellationToken.None);
+        Assert.True(taskResult.Ok);
+        Assert.Equal("MCP parent", taskResult.Data!.Title);
+    }
+
+    [Fact]
+    public async Task McpTools_UpdateStatus_RejectsUnauthorizedAgent()
+    {
+        await using var fixture = await TaskWorkflowFixture.CreateAsync();
+        var task = await fixture.TaskService.CreateDashboardTaskAsync(
+            "Programmer cannot move",
+            "State changes stay with Iris/Bao.",
+            "iris",
+            "Normal",
+            "programmer",
+            null,
+            CancellationToken.None);
+
+        fixture.SetCallerAgent("programmer");
+        var tools = CreateTools(fixture);
+
+        var result = await tools.UpdateStatus(task.Id, NexusMcpTaskState.Done, CancellationToken.None);
+
+        Assert.False(result.Ok);
+        Assert.Equal("nexus_update_status", result.Command);
+        Assert.Contains("not authorized", result.Error, StringComparison.OrdinalIgnoreCase);
+    }
+
+    [Fact]
+    public async Task McpTools_ServiceKey_ResolvesAsNexusSystem()
+    {
+        await using var fixture = await TaskWorkflowFixture.CreateAsync();
+        fixture.HttpContextAccessor.HttpContext = TaskWorkflowFixture.CreateHttpContext(
+            headers: new Dictionary<string, string>
+            {
+                ["X-Nexus-Api-Key"] = "test-service-key"
+            });
+
+        var tools = CreateTools(fixture);
+        var result = await tools.CreateTask(
+            title: "System MCP task",
+            assignedTo: "iris",
+            ct: CancellationToken.None);
+
+        Assert.True(result.Ok);
+        Assert.Equal("bao", result.Data!.Source);
+    }
+
+    private static NexusMcpTools CreateTools(TaskWorkflowFixture fixture)
+        => new(
+            fixture.TaskBridgeService,
+            fixture.AgentService,
+            fixture.HttpContextAccessor,
+            fixture.Configuration,
+            NullLogger<NexusMcpTools>.Instance);
+}

backend-tests/OperationsSnapshotTests.cs

@@ -94,6 +94,8 @@ internal sealed class GuardedTaskRepository(RepositoryConcurrencyGuard guard) :
     public ValueTask<WorkTask?> GetByIdAsync(Guid id, CancellationToken ct = default) => throw new NotSupportedException();
     public Task<List<WorkTask>> GetPendingApprovalAsync(CancellationToken ct = default) => throw new NotSupportedException();
     public Task<WorkTask> AddAsync(WorkTask task, CancellationToken ct = default) => throw new NotSupportedException();
+    public Task<bool> TryResetStaleInProgressToBacklogAsync(Guid id, DateTimeOffset staleBefore, DateTimeOffset updatedAt, CancellationToken ct = default)
+        => throw new NotSupportedException();
     public Task UpdateAsync(WorkTask task, CancellationToken ct = default) => throw new NotSupportedException();
     public Task DeleteAsync(WorkTask task, CancellationToken ct = default) => throw new NotSupportedException();
     public Task<int> CountAsync(CancellationToken ct = default) => throw new NotSupportedException();

backend-tests/StaleTaskRecoveryTests.cs

@@ -0,0 +1,348 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging.Abstractions;
+using Microsoft.Extensions.Options;
+using Nexus.Api.Data;
+using Nexus.Api.Models;
+using Nexus.Api.Repositories;
+using Nexus.Api.Services;
+using Xunit;
+
+namespace Nexus.Api.Tests;
+
+public sealed class StaleTaskRecoveryTests
+{
+    [Fact]
+    public async Task ResetStaleInProgressTasksAsync_OnlyResetsStaleInProgressTasks_AndWritesActivity()
+    {
+        await using var fixture = await TaskWorkflowFixture.CreateAsync();
+        var staleTimestamp = DateTimeOffset.UtcNow.AddHours(-3);
+
+        var staleInProgress = await fixture.TaskRepository.AddAsync(new WorkTask
+        {
+            Title = "Stale in progress",
+            State = "In progress",
+            Source = "iris",
+            UpdatedAt = staleTimestamp,
+            CreatedAt = staleTimestamp
+        }, CancellationToken.None);
+
+        await fixture.ActivityRepository.AddAsync(new ActivityEvent
+        {
+            Type = "comment",
+            Message = "Previous agent note",
+            TaskId = staleInProgress.Id,
+            CreatedAt = staleTimestamp.AddMinutes(15)
+        }, CancellationToken.None);
+
+        var staleBlocked = await fixture.TaskRepository.AddAsync(new WorkTask
+        {
+            Title = "Blocked task",
+            State = "Blocked",
+            Source = "iris",
+            UpdatedAt = staleTimestamp,
+            CreatedAt = staleTimestamp
+        }, CancellationToken.None);
+
+        var staleReview = await fixture.TaskRepository.AddAsync(new WorkTask
+        {
+            Title = "Review task",
+            State = "Review",
+            Source = "iris",
+            UpdatedAt = staleTimestamp,
+            CreatedAt = staleTimestamp
+        }, CancellationToken.None);
+
+        var staleDone = await fixture.TaskRepository.AddAsync(new WorkTask
+        {
+            Title = "Done task",
+            State = "Done",
+            Source = "iris",
+            UpdatedAt = staleTimestamp,
+            CreatedAt = staleTimestamp
+        }, CancellationToken.None);
+
+        var staleBacklog = await fixture.TaskRepository.AddAsync(new WorkTask
+        {
+            Title = "Backlog task",
+            State = "Backlog",
+            Source = "iris",
+            UpdatedAt = staleTimestamp,
+            CreatedAt = staleTimestamp
+        }, CancellationToken.None);
+
+        var freshInProgress = await fixture.TaskRepository.AddAsync(new WorkTask
+        {
+            Title = "Fresh in progress",
+            State = "In progress",
+            Source = "iris",
+            UpdatedAt = DateTimeOffset.UtcNow.AddMinutes(-30),
+            CreatedAt = staleTimestamp
+        }, CancellationToken.None);
+
+        var resetCount = await fixture.StaleTaskRecoveryService.ResetStaleInProgressTasksAsync(TimeSpan.FromHours(2), CancellationToken.None);
+
+        Assert.Equal(1, resetCount);
+        Assert.Equal("Backlog", (await fixture.TaskService.GetByIdAsync(staleInProgress.Id, CancellationToken.None))!.State);
+        Assert.Equal("Blocked", (await fixture.TaskService.GetByIdAsync(staleBlocked.Id, CancellationToken.None))!.State);
+        Assert.Equal("Review", (await fixture.TaskService.GetByIdAsync(staleReview.Id, CancellationToken.None))!.State);
+        Assert.Equal("Done", (await fixture.TaskService.GetByIdAsync(staleDone.Id, CancellationToken.None))!.State);
+        Assert.Equal("Backlog", (await fixture.TaskService.GetByIdAsync(staleBacklog.Id, CancellationToken.None))!.State);
+        Assert.Equal("In progress", (await fixture.TaskService.GetByIdAsync(freshInProgress.Id, CancellationToken.None))!.State);
+
+        var activity = await fixture.TaskService.GetTaskActivityAsync(staleInProgress.Id, CancellationToken.None);
+        var resetActivity = activity.FirstOrDefault(entry => entry.Message.Contains("stale recovery", StringComparison.Ordinal));
+
+        Assert.NotNull(resetActivity);
+        Assert.Contains("reason=stale-recovery", resetActivity!.Message, StringComparison.Ordinal);
+        Assert.Contains("previous status In progress", resetActivity.Message, StringComparison.Ordinal);
+        Assert.Contains("stale reference", resetActivity.Message, StringComparison.Ordinal);
+        Assert.Contains("last activity", resetActivity.Message, StringComparison.Ordinal);
+        Assert.Contains("new status Backlog", resetActivity.Message, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public async Task ResetStaleInProgressTasksAsync_RevalidatesCurrentTaskBeforeReset()
+    {
+        var staleTimestamp = DateTimeOffset.UtcNow.AddHours(-3);
+        var taskId = Guid.NewGuid();
+        var staleCandidate = new WorkTask
+        {
+            Id = taskId,
+            Title = "Changed during recovery scan",
+            State = "In progress",
+            Source = "iris",
+            UpdatedAt = staleTimestamp,
+            CreatedAt = staleTimestamp
+        };
+        var currentTask = new WorkTask
+        {
+            Id = taskId,
+            Title = "Changed during recovery scan",
+            State = "Review",
+            Source = "iris",
+            UpdatedAt = staleTimestamp,
+            CreatedAt = staleTimestamp
+        };
+        var taskRepository = new FakeTaskRepository(staleCandidate, currentTask);
+        var activityRepository = new FakeActivityRepository();
+        var liveUpdateService = new FakeLiveUpdateService();
+        var recoveryService = new StaleTaskRecoveryService(
+            taskRepository,
+            activityRepository,
+            liveUpdateService);
+
+        var resetCount = await recoveryService.ResetStaleInProgressTasksAsync(TimeSpan.FromHours(2), CancellationToken.None);
+
+        Assert.Equal(0, resetCount);
+        Assert.Equal("Review", currentTask.State);
+        Assert.Equal(0, taskRepository.ResetCount);
+        Assert.Empty(activityRepository.Added);
+        Assert.Equal(0, liveUpdateService.PublishCount);
+    }
+
+    [Fact]
+    public async Task BackgroundService_RunRecoveryOnceAsync_UsesConfiguredThreshold_AndCallsRecoveryService()
+    {
+        var fakeRecoveryService = new FakeStaleTaskRecoveryService();
+        var services = new ServiceCollection();
+        services.AddScoped<IStaleTaskRecoveryService>(_ => fakeRecoveryService);
+
+        await using var provider = services.BuildServiceProvider();
+        var backgroundService = new StaleTaskRecoveryBackgroundService(
+            provider.GetRequiredService<IServiceScopeFactory>(),
+            new TestOptionsMonitor<StaleTaskRecoveryOptions>(new StaleTaskRecoveryOptions
+            {
+                StaleHours = 4,
+                IntervalMinutes = 30
+            }),
+            NullLogger<StaleTaskRecoveryBackgroundService>.Instance);
+
+        var resetCount = await backgroundService.RunRecoveryOnceAsync(CancellationToken.None);
+
+        Assert.Equal(1, fakeRecoveryService.CallCount);
+        Assert.Equal(TimeSpan.FromHours(4), fakeRecoveryService.LastThreshold);
+        Assert.Equal(7, resetCount);
+    }
+
+    [Fact]
+    public async Task BackgroundService_StartAsync_RunsRecoveryWithoutWaitingForFullInterval()
+    {
+        var fakeRecoveryService = new FakeStaleTaskRecoveryService();
+        var firstCall = new TaskCompletionSource<bool>(TaskCreationOptions.RunContinuationsAsynchronously);
+        fakeRecoveryService.OnCall = () => firstCall.TrySetResult(true);
+
+        var services = new ServiceCollection();
+        services.AddScoped<IStaleTaskRecoveryService>(_ => fakeRecoveryService);
+
+        await using var provider = services.BuildServiceProvider();
+        var backgroundService = new StaleTaskRecoveryBackgroundService(
+            provider.GetRequiredService<IServiceScopeFactory>(),
+            new TestOptionsMonitor<StaleTaskRecoveryOptions>(new StaleTaskRecoveryOptions
+            {
+                StaleHours = 2,
+                IntervalMinutes = 30
+            }),
+            NullLogger<StaleTaskRecoveryBackgroundService>.Instance);
+
+        using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(5));
+        await backgroundService.StartAsync(cts.Token);
+        await firstCall.Task.WaitAsync(cts.Token);
+        await backgroundService.StopAsync(CancellationToken.None);
+
+        Assert.True(fakeRecoveryService.CallCount >= 1);
+        Assert.Equal(TimeSpan.FromHours(2), fakeRecoveryService.LastThreshold);
+    }
+
+    [Fact]
+    public void TaskRecoveryOptions_BindsStaleHoursFromEnvironmentOverride()
+    {
+        const string key = "TaskRecovery__StaleHours";
+        var originalValue = Environment.GetEnvironmentVariable(key);
+
+        try
+        {
+            Environment.SetEnvironmentVariable(key, "5");
+
+            var configuration = new ConfigurationBuilder()
+                .AddInMemoryCollection(new Dictionary<string, string?>
+                {
+                    [$"{StaleTaskRecoveryOptions.SectionName}:StaleHours"] = "2",
+                    [$"{StaleTaskRecoveryOptions.SectionName}:IntervalMinutes"] = "30"
+                })
+                .AddEnvironmentVariables()
+                .Build();
+
+            var options = configuration.GetSection(StaleTaskRecoveryOptions.SectionName).Get<StaleTaskRecoveryOptions>();
+
+            Assert.NotNull(options);
+            Assert.Equal(5, options!.StaleHours);
+            Assert.Equal(30, options.IntervalMinutes);
+        }
+        finally
+        {
+            Environment.SetEnvironmentVariable(key, originalValue);
+        }
+    }
+}
+
+file sealed class FakeTaskRepository(WorkTask staleCandidate, WorkTask currentTask) : ITaskRepository
+{
+    public int ResetCount { get; private set; }
+
+    public Task<List<WorkTask>> GetAllAsync(CancellationToken ct = default)
+        => Task.FromResult(new List<WorkTask> { staleCandidate });
+
+    public ValueTask<WorkTask?> GetByIdAsync(Guid id, CancellationToken ct = default)
+        => ValueTask.FromResult<WorkTask?>(id == currentTask.Id ? currentTask : null);
+
+    public Task<bool> TryResetStaleInProgressToBacklogAsync(
+        Guid id,
+        DateTimeOffset staleBefore,
+        DateTimeOffset updatedAt,
+        CancellationToken ct = default)
+    {
+        if (id != currentTask.Id
+            || !string.Equals(currentTask.State, "In progress", StringComparison.OrdinalIgnoreCase)
+            || currentTask.UpdatedAt >= staleBefore)
+        {
+            return Task.FromResult(false);
+        }
+
+        ResetCount++;
+        currentTask.State = "Backlog";
+        currentTask.UpdatedAt = updatedAt;
+        return Task.FromResult(true);
+    }
+
+    public Task UpdateAsync(WorkTask task, CancellationToken ct = default)
+    {
+        return Task.CompletedTask;
+    }
+
+    public Task<List<WorkTask>> GetPendingApprovalAsync(CancellationToken ct = default)
+        => Task.FromResult(new List<WorkTask>());
+
+    public Task<WorkTask> AddAsync(WorkTask task, CancellationToken ct = default)
+        => Task.FromResult(task);
+
+    public Task DeleteAsync(WorkTask task, CancellationToken ct = default)
+        => Task.CompletedTask;
+
+    public Task<int> CountAsync(CancellationToken ct = default)
+        => Task.FromResult(0);
+
+    public Task<int> CountByStateAsync(string state, CancellationToken ct = default)
+        => Task.FromResult(0);
+
+    public Task<WorkTask?> GetLastBlockedAsync(CancellationToken ct = default)
+        => Task.FromResult<WorkTask?>(null);
+}
+
+file sealed class FakeActivityRepository : IActivityRepository
+{
+    public List<ActivityEvent> Added { get; } = [];
+
+    public Task<List<ActivityEvent>> GetRecentAsync(int take, CancellationToken ct = default)
+        => Task.FromResult(new List<ActivityEvent>());
+
+    public Task<List<ActivityEvent>> GetRecentForTasksAsync(IEnumerable<Guid> taskIds, CancellationToken ct = default)
+        => Task.FromResult(new List<ActivityEvent>());
+
+    public Task<(List<ActivityEvent> Items, int TotalCount)> GetPagedAsync(
+        string? type,
+        string? sort,
+        int page,
+        int pageSize,
+        CancellationToken ct = default)
+        => Task.FromResult((new List<ActivityEvent>(), 0));
+
+    public Task<List<ActivityEvent>> GetByAgentAsync(string agentId, int take, CancellationToken ct = default)
+        => Task.FromResult(new List<ActivityEvent>());
+
+    public Task<ActivityEvent> AddAsync(ActivityEvent activity, CancellationToken ct = default)
+    {
+        Added.Add(activity);
+        return Task.FromResult(activity);
+    }
+}
+
+file sealed class FakeLiveUpdateService : ILiveUpdateService
+{
+    public int PublishCount { get; private set; }
+    public long CurrentSequence => PublishCount;
+
+    public Task<LiveUpdateSubscription> SubscribeAsync(long? afterSequence = null, CancellationToken ct = default)
+        => throw new NotSupportedException();
+
+    public LiveUpdateEnvelope Publish(string type, object payload, string channel = "dashboard")
+    {
+        PublishCount++;
+        return new LiveUpdateEnvelope(type, DateTimeOffset.UtcNow, payload, PublishCount, channel);
+    }
+}
+
+file sealed class FakeStaleTaskRecoveryService : IStaleTaskRecoveryService
+{
+    public int CallCount { get; private set; }
+    public TimeSpan LastThreshold { get; private set; }
+    public Action? OnCall { get; set; }
+
+    public Task<int> ResetStaleInProgressTasksAsync(TimeSpan staleThreshold, CancellationToken ct = default)
+    {
+        CallCount++;
+        LastThreshold = staleThreshold;
+        OnCall?.Invoke();
+        return Task.FromResult(7);
+    }
+}
+
+file sealed class TestOptionsMonitor<T>(T currentValue) : IOptionsMonitor<T>
+{
+    public T CurrentValue { get; private set; } = currentValue;
+
+    public T Get(string? name) => CurrentValue;
+
+    public IDisposable? OnChange(Action<T, string?> listener) => null;
+}

backend-tests/TaskWorkflowTests.cs

@@ -178,7 +178,7 @@ public sealed class TaskWorkflowTests
     {
         await using var fixture = await TaskWorkflowFixture.CreateAsync();
 
-        var controller = new TasksController(fixture.TaskService, fixture.AgentService, fixture.Configuration)
+        var controller = new TasksController(fixture.TaskService, fixture.AgentService, fixture.Configuration, fixture.ActivityRepository)
         {
             ControllerContext = new ControllerContext
             {
@@ -199,7 +199,7 @@ public sealed class TaskWorkflowTests
     {
         await using var fixture = await TaskWorkflowFixture.CreateAsync();
 
-        var controller = new TasksController(fixture.TaskService, fixture.AgentService, fixture.Configuration)
+        var controller = new TasksController(fixture.TaskService, fixture.AgentService, fixture.Configuration, fixture.ActivityRepository)
         {
             ControllerContext = new ControllerContext
             {
@@ -217,7 +217,7 @@ public sealed class TaskWorkflowTests
     {
         await using var fixture = await TaskWorkflowFixture.CreateAsync();
 
-        var controller = new TasksController(fixture.TaskService, fixture.AgentService, fixture.Configuration)
+        var controller = new TasksController(fixture.TaskService, fixture.AgentService, fixture.Configuration, fixture.ActivityRepository)
         {
             ControllerContext = new ControllerContext
             {
@@ -238,7 +238,7 @@ public sealed class TaskWorkflowTests
     {
         await using var fixture = await TaskWorkflowFixture.CreateAsync();
 
-        var controller = new TasksController(fixture.TaskService, fixture.AgentService, fixture.Configuration)
+        var controller = new TasksController(fixture.TaskService, fixture.AgentService, fixture.Configuration, fixture.ActivityRepository)
         {
             ControllerContext = new ControllerContext
             {
@@ -256,7 +256,7 @@ public sealed class TaskWorkflowTests
     {
         await using var fixture = await TaskWorkflowFixture.CreateAsync();
 
-        var controller = new TasksController(fixture.TaskService, fixture.AgentService, fixture.Configuration)
+        var controller = new TasksController(fixture.TaskService, fixture.AgentService, fixture.Configuration, fixture.ActivityRepository)
         {
             ControllerContext = new ControllerContext
             {
@@ -277,7 +277,7 @@ public sealed class TaskWorkflowTests
     {
         await using var fixture = await TaskWorkflowFixture.CreateAsync();
 
-        var controller = new TasksController(fixture.TaskService, fixture.AgentService, fixture.Configuration)
+        var controller = new TasksController(fixture.TaskService, fixture.AgentService, fixture.Configuration, fixture.ActivityRepository)
         {
             ControllerContext = new ControllerContext
             {
@@ -372,7 +372,7 @@ public sealed class TaskWorkflowTests
     }
 }
 
-file sealed class TaskWorkflowFixture : IAsyncDisposable
+internal sealed class TaskWorkflowFixture : IAsyncDisposable
 {
     private readonly NexusDbContext _db;
 
@@ -383,6 +383,7 @@ file sealed class TaskWorkflowFixture : IAsyncDisposable
         IActivityRepository activityRepository,
         INotificationService notificationService,
         ILiveUpdateService liveUpdateService,
+        IStaleTaskRecoveryService staleTaskRecoveryService,
         ITaskService taskService,
         ITaskBridgeService taskBridgeService,
         IAgentService agentService,
@@ -394,6 +395,7 @@ file sealed class TaskWorkflowFixture : IAsyncDisposable
         ActivityRepository = activityRepository;
         NotificationService = notificationService;
         LiveUpdateService = liveUpdateService;
+        StaleTaskRecoveryService = staleTaskRecoveryService;
         TaskService = taskService;
         TaskBridgeService = taskBridgeService;
         AgentService = agentService;
@@ -405,6 +407,7 @@ file sealed class TaskWorkflowFixture : IAsyncDisposable
     public IActivityRepository ActivityRepository { get; }
     public INotificationService NotificationService { get; }
     public ILiveUpdateService LiveUpdateService { get; }
+    public IStaleTaskRecoveryService StaleTaskRecoveryService { get; }
     public ITaskService TaskService { get; }
     public ITaskBridgeService TaskBridgeService { get; }
     public IAgentService AgentService { get; }
@@ -430,10 +433,14 @@ file sealed class TaskWorkflowFixture : IAsyncDisposable
 
         var agentService = new AgentService(configuration, new FakeRuntime());
         var liveUpdateService = new LiveUpdateService();
-        var activityRepository = new ActivityRepository(db);
+        var activityRepository = new ActivityRepository(db, liveUpdateService);
         var taskRepository = new TaskRepository(db);
         var notificationService = new NotificationService(db, liveUpdateService);
         var httpContextAccessor = new HttpContextAccessor { HttpContext = CreateHttpContext(agentId: "iris") };
+        var staleTaskRecoveryService = new StaleTaskRecoveryService(
+            taskRepository,
+            activityRepository,
+            liveUpdateService);
 
         var taskService = new TaskService(
             taskRepository,
@@ -441,7 +448,8 @@ file sealed class TaskWorkflowFixture : IAsyncDisposable
             notificationService,
             agentService,
             httpContextAccessor,
-            liveUpdateService);
+            liveUpdateService,
+            staleTaskRecoveryService);
 
         var taskBridgeService = new TaskBridgeService(
             taskService,
@@ -457,6 +465,7 @@ file sealed class TaskWorkflowFixture : IAsyncDisposable
             activityRepository,
             notificationService,
             liveUpdateService,
+            staleTaskRecoveryService,
             taskService,
             taskBridgeService,
             agentService,
@@ -539,6 +548,7 @@ file sealed class FakeDashboardService : IDashboardService
     public Task<ChatResponse> SendChatAsync(string agentId, string message) => Task.FromResult(new ChatResponse(true, "", null));
     public Task<List<MessageEntry>> GetMessagesAsync(string? sessionKey, int limit, int offset) => Task.FromResult(new List<MessageEntry>());
     public Task<List<QueueItem>> GetQueueAsync(CancellationToken ct) => Task.FromResult(new List<QueueItem>());
+    public Task<GatewayRuntimeInfo> GetGatewayInfoAsync(CancellationToken ct) => Task.FromResult(new GatewayRuntimeInfo(true, "http://gateway", "test", "test", true, true, "matched", DateTimeOffset.UtcNow, "ok"));
     public Task<QueueDeleteResult> DeleteQueueItemAsync(string id, string? source, CancellationToken ct) => Task.FromResult(new QueueDeleteResult(QueueDeleteOutcome.Ignored));
     public Task<QueuePriorityResult> CycleQueuePriorityAsync(string id, CancellationToken ct) => Task.FromResult(new QueuePriorityResult(QueuePriorityOutcome.Ignored));
     public Task<AgentModelInfo?> GetAgentModelAsync(string agentId) => Task.FromResult<AgentModelInfo?>(null);

backend/Controllers/AgentsController.cs

@@ -1,5 +1,7 @@
+using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.RateLimiting;
+using System.Security.Claims;
 using Nexus.Api.DTOs;
 using Nexus.Api.Integrations;
 using Nexus.Api.Repositories;
@@ -14,6 +16,7 @@ public class AgentsController(
     IAgentRuntime runtime,
     IActivityRepository activityRepo,
     IAgentConfigService agentConfigService,
+    IDashboardService dashboardService,
     ILogger<AgentsController> logger) : ControllerBase
 {
     [HttpGet]
@@ -39,7 +42,25 @@ public class AgentsController(
     public async Task<IResult> GetAgentActivity(string id, CancellationToken ct)
     {
         var items = await activityRepo.GetByAgentAsync(id, 50, ct);
-        return Results.Ok(items.Select(x => new { x.Id, x.Type, x.Message, at = x.CreatedAt }));
+        var activity = items
+            .Select(x => new AgentActivityResponse(x.Id, x.Type, x.Message, x.CreatedAt, "activity"))
+            .ToList();
+
+        var gatewayEntries = await dashboardService.GetAgentActivityAsync(id, 10);
+        foreach (var entry in gatewayEntries)
+            activity.Add(new AgentActivityResponse(null, "thinking", entry.Text, entry.Timestamp, entry.Source, entry.Time));
+
+        return Results.Ok(activity
+            .OrderByDescending(x => x.At)
+            .Take(50));
+    }
+
+    [HttpGet("{id}/summary")]
+    public async Task<IResult> GetAgentSummary(string id, CancellationToken ct)
+    {
+        var recent = await activityRepo.GetByAgentAsync(id, 25, ct);
+        var gatewayEntries = await dashboardService.GetAgentActivityAsync(id, 8);
+        return Results.Ok(AgentSummaryBuilder.Build(recent, gatewayEntries, DateTimeOffset.UtcNow));
     }
 
     [HttpPost("{id}/command")]
@@ -84,20 +105,48 @@ public class AgentsController(
     }
 
     [HttpPut("{id}/config/{fileName}")]
+    [Authorize(Roles = "owner")]
     public async Task<IResult> SaveConfigFile(string id, string fileName, [FromBody] SaveConfigRequest request, CancellationToken ct)
     {
         if (request.Content is null)
             return Results.BadRequest(new { error = "Content is required." });
 
-        if (request.Content.Length > 500 * 1024)
-            return Results.BadRequest(new { error = "Content exceeds maximum size of 500KB." });
-
         try
         {
-            var result = await agentConfigService.SaveConfigFileAsync(id, fileName, request.Content, ct);
-            return result is null
-                ? Results.BadRequest(new { error = "Invalid filename or path." })
-                : Results.Ok(new { result.FileName, result.Size, result.ModifiedAt });
+            var attempt = await agentConfigService.SaveConfigFileAsync(id, fileName, request.Content, ct);
+            var caller = DescribeCaller(HttpContext.User);
+
+            if (attempt.Failure is not null)
+            {
+                await activityRepo.AddAsync(new Data.ActivityEvent
+                {
+                    Type = "config_audit",
+                    Message = $"Config save rejected agent={id} file={fileName} caller={caller} validation={attempt.Failure.Validation.Status} backup={attempt.Failure.Backup.Status} reload={attempt.Failure.ReloadCheck.Status} code={attempt.Failure.Code}",
+                }, ct);
+
+                return Results.ValidationProblem(new Dictionary<string, string[]>
+                {
+                    ["content"] = attempt.Failure.Validation.Errors.ToArray()
+                });
+            }
+
+            var result = attempt.SaveResult!;
+
+            await activityRepo.AddAsync(new Data.ActivityEvent
+            {
+                Type = "config_audit",
+                Message = $"Config save agent={id} file={fileName} caller={caller} validation={result.Validation.Status} backup={result.Backup.Status} reload={result.ReloadCheck.Status}",
+            }, ct);
+
+            return Results.Ok(new
+            {
+                result.FileName,
+                result.Size,
+                result.ModifiedAt,
+                result.Validation,
+                result.Backup,
+                ReloadCheck = result.ReloadCheck
+            });
         }
         catch (UnauthorizedAccessException ex)
         {
@@ -116,4 +165,92 @@ public class AgentsController(
                 statusCode: StatusCodes.Status500InternalServerError);
         }
     }
+
+    private static string DescribeCaller(ClaimsPrincipal user)
+    {
+        var subject = user.FindFirst(ClaimTypes.NameIdentifier)?.Value
+            ?? user.FindFirst(ClaimTypes.Email)?.Value
+            ?? user.Identity?.Name
+            ?? "unknown";
+
+        var role = user.FindFirst(ClaimTypes.Role)?.Value ?? "owner";
+        return $"{role}:{subject}".ToLowerInvariant();
+    }
+}
+
+public sealed record AgentActivityResponse(
+    long? Id,
+    string Type,
+    string Message,
+    DateTimeOffset At,
+    string Source,
+    string? RelativeTime = null
+);
+
+public sealed record AgentSummaryResponse(
+    AgentSummaryItemResponse Now,
+    AgentSummaryItemResponse Today,
+    DateTimeOffset GeneratedAt
+);
+
+public sealed record AgentSummaryItemResponse(
+    string Text,
+    string Source,
+    DateTimeOffset? Timestamp
+);
+
+public static class AgentSummaryBuilder
+{
+    public static AgentSummaryResponse Build(
+        IReadOnlyList<Nexus.Api.Data.ActivityEvent> activity,
+        IReadOnlyList<Nexus.Api.Models.AgentActivityEntry> gatewayEntries,
+        DateTimeOffset nowUtc)
+    {
+        var points = activity
+            .Select(entry => new SummaryPoint(entry.Message, entry.CreatedAt, "nexus-activity"))
+            .Concat(gatewayEntries.Select(entry => new SummaryPoint(entry.Text, entry.Timestamp, entry.Source)))
+            .Select(point => point with { Text = AgentActivityText.RedactForDisplay(point.Text) })
+            .Where(point => !string.IsNullOrWhiteSpace(point.Text))
+            .OrderByDescending(point => point.Timestamp)
+            .ToList();
+
+        var current = points.FirstOrDefault();
+        var now = current is null
+            ? new AgentSummaryItemResponse("Keine aktuelle Aktivitaet.", "none", null)
+            : new AgentSummaryItemResponse(current.Text, current.Source, current.Timestamp);
+
+        var windowStart = nowUtc.AddHours(-24);
+        var todayPoints = points
+            .Where(point => point.Timestamp >= windowStart)
+            .ToList();
+
+        AgentSummaryItemResponse today;
+        if (todayPoints.Count == 0)
+        {
+            today = new AgentSummaryItemResponse("Heute keine verwertbaren Checkpoints.", "none", null);
+        }
+        else
+        {
+            var snippets = todayPoints
+                .Select(point => point.Text)
+                .Distinct(StringComparer.OrdinalIgnoreCase)
+                .Take(3)
+                .ToList();
+
+            var extraCount = Math.Max(0, todayPoints.Count - snippets.Count);
+            var text = $"Letzte 24h: {string.Join(" | ", snippets)}";
+            if (extraCount > 0)
+                text += $" (+{extraCount} weitere)";
+
+            var source = todayPoints.Select(point => point.Source).Distinct(StringComparer.OrdinalIgnoreCase).Count() == 1
+                ? todayPoints[0].Source
+                : "derived-mixed";
+
+            today = new AgentSummaryItemResponse(text, source, todayPoints[0].Timestamp);
+        }
+
+        return new AgentSummaryResponse(now, today, nowUtc);
+    }
+
+    private sealed record SummaryPoint(string Text, DateTimeOffset Timestamp, string Source);
 }

backend/Controllers/DashboardController.cs

@@ -56,6 +56,10 @@ public class DashboardController(
     public async Task<List<QueueItem>> GetQueue(CancellationToken ct)
         => await dashboardService.GetQueueAsync(ct);
 
+    [HttpGet("gateway")]
+    public async Task<GatewayRuntimeInfo> GetGateway(CancellationToken ct)
+        => await dashboardService.GetGatewayInfoAsync(ct);
+
     [HttpDelete("queue/{id}")]
     public async Task<ActionResult> DeleteQueueItem(string id, [FromQuery] string? source, CancellationToken ct)
     {

backend/Controllers/TasksController.cs

@@ -1,8 +1,10 @@
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
+using System.Security.Claims;
 using Nexus.Api.Data;
 using Nexus.Api.DTOs;
 using Nexus.Api.Models;
+using Nexus.Api.Repositories;
 using Nexus.Api.Services;
 
 namespace Nexus.Api.Controllers;
@@ -10,7 +12,11 @@ namespace Nexus.Api.Controllers;
 [Authorize]
 [ApiController]
 [Route("api/v1/tasks")]
-public class TasksController(ITaskService taskService, IAgentService agentService, IConfiguration configuration) : ControllerBase
+public class TasksController(
+    ITaskService taskService,
+    IAgentService agentService,
+    IConfiguration configuration,
+    IActivityRepository activityRepository) : ControllerBase
 {
     [HttpGet]
     public async Task<IResult> GetAll(CancellationToken ct)
@@ -27,6 +33,7 @@ public class TasksController(ITaskService taskService, IAgentService agentServic
     }
 
     [HttpGet("pending-approval")]
+    [Authorize(Roles = "owner")]
     public async Task<IResult> GetPendingApproval(CancellationToken ct)
     {
         var pending = await taskService.GetPendingApprovalAsync(ct);
@@ -34,9 +41,11 @@ public class TasksController(ITaskService taskService, IAgentService agentServic
     }
 
     [HttpPost("{id:guid}/approve")]
+    [Authorize(Roles = "owner")]
     public async Task<IResult> Approve(Guid id, CancellationToken ct)
     {
         var result = await taskService.ApproveAsync(id, ct);
+        await WriteApprovalAuditAsync(id, "approve", result.Outcome, result.Task?.State, ct);
         return result.Outcome switch
         {
             TaskOperationOutcome.NotFound => Results.NotFound(),
@@ -49,9 +58,11 @@ public class TasksController(ITaskService taskService, IAgentService agentServic
     }
 
     [HttpPost("{id:guid}/reject")]
+    [Authorize(Roles = "owner")]
     public async Task<IResult> Reject(Guid id, CancellationToken ct)
     {
         var result = await taskService.RejectAsync(id, ct);
+        await WriteApprovalAuditAsync(id, "reject", result.Outcome, result.Task?.State, ct);
         return result.Outcome switch
         {
             TaskOperationOutcome.NotFound => Results.NotFound(),
@@ -160,4 +171,30 @@ public class TasksController(ITaskService taskService, IAgentService agentServic
         var count = await taskService.ResetStaleAsync(request.StaleHours, ct);
         return Results.Ok(new ResetStaleResponse(count));
     }
+
+    private async Task WriteApprovalAuditAsync(
+        Guid taskId,
+        string action,
+        TaskOperationOutcome outcome,
+        string? state,
+        CancellationToken ct)
+    {
+        await activityRepository.AddAsync(new ActivityEvent
+        {
+            Type = "task_approval_audit",
+            Message = $"Task approval task={taskId} action={action} caller={DescribeCaller(HttpContext.User)} outcome={outcome} checkpoint={(state ?? "none")}",
+            TaskId = taskId
+        }, ct);
+    }
+
+    private static string DescribeCaller(ClaimsPrincipal user)
+    {
+        var subject = user.FindFirst(ClaimTypes.NameIdentifier)?.Value
+            ?? user.FindFirst(ClaimTypes.Email)?.Value
+            ?? user.Identity?.Name
+            ?? "unknown";
+
+        var role = user.FindFirst(ClaimTypes.Role)?.Value ?? "owner";
+        return $"{role}:{subject}".ToLowerInvariant();
+    }
 }

backend/Extensions/ServiceCollectionExtensions.cs

@@ -4,6 +4,7 @@ using Microsoft.AspNetCore.RateLimiting;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Diagnostics.HealthChecks;
 using Microsoft.IdentityModel.Tokens;
+using ModelContextProtocol.AspNetCore;
 using Nexus.Api.Data;
 using Nexus.Api.Integrations;
 using Nexus.Api.RateLimiting;
@@ -202,6 +203,12 @@ public static class ServiceCollectionExtensions
     /// </summary>
     public static IServiceCollection AddNexusApplicationServices(this IServiceCollection services)
     {
+        services.AddMcpServer()
+            .WithHttpTransport(options => options.Stateless = true)
+            .WithTools<NexusMcpTools>();
+
+        services.AddOptions<StaleTaskRecoveryOptions>()
+            .BindConfiguration(StaleTaskRecoveryOptions.SectionName);
         services.AddHttpContextAccessor();
         services.AddSingleton<LoginAttemptTracker>();
         services.AddTransient<ModelRoutingService>();
@@ -219,6 +226,8 @@ public static class ServiceCollectionExtensions
         services.AddSingleton<ILiveUpdateService, LiveUpdateService>();
         services.AddScoped<INotificationService, NotificationService>();
         services.AddScoped<ICalendarService, CalendarService>();
+        services.AddScoped<IStaleTaskRecoveryService, StaleTaskRecoveryService>();
+        services.AddHostedService<StaleTaskRecoveryBackgroundService>();
 
         // ── Backend Bridge (Agent-Command-Service) ──
         services.AddScoped<ITaskBridgeService, TaskBridgeService>();

backend/Helpers/PathSecurityHelper.cs

@@ -26,10 +26,10 @@ public static class PathSecurityHelper
         return true;
     }
 
-    /// <summary>Validates config filename against path-traversal; must be alphanumeric .md.</summary>
+    /// <summary>Validates config filename against path-traversal; must be alphanumeric .md or .json.</summary>
     public static bool IsValidConfigFileName(string fileName)
     {
         if (string.IsNullOrWhiteSpace(fileName)) return false;
-        return System.Text.RegularExpressions.Regex.IsMatch(fileName, @"^[a-zA-Z0-9._-]+\.md$");
+        return System.Text.RegularExpressions.Regex.IsMatch(fileName, @"^[a-zA-Z0-9._-]+\.(md|json)$");
     }
 }

backend/Models/Dashboard.cs

@@ -14,6 +14,8 @@ public sealed record DashboardAgentInfo(
     string? Goal = null,
     string RoleBadge = "badge-slate",
     string StatusLabel = "Bereit",
+    string StatusKind = "ready",
+    string? StatusDetail = null,
     string? Elapsed = null,
     string? Think = null,
     string? Next = null
@@ -136,7 +138,22 @@ public sealed record UpdateDashboardTaskStatusRequest(
 
 public sealed record AgentActivityEntry(
     string Time,
-    string Text
+    string Text,
+    DateTimeOffset Timestamp,
+    string Source = "gateway-session-history"
+);
+
+public sealed record GatewayRuntimeInfo(
+    bool Reachable,
+    string BaseUrl,
+    string? Version,
+    string? RequiredVersion,
+    bool VersionPinned,
+    bool VersionMatches,
+    string VersionStatus,
+    DateTimeOffset CheckedAt,
+    string? Message,
+    string? Warning = null
 );
 
 // ── Task Board DTOs ──

backend/Nexus.Api.csproj

@@ -10,9 +10,9 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
+    <PackageReference Include="ModelContextProtocol.AspNetCore" Version="1.4.0" />
     <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="10.0.2" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="10.2.1" />
     <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="10.0.8" />
   </ItemGroup>
 </Project>
-

backend/Program.cs

@@ -22,5 +22,6 @@ await app.EnsureDatabaseAsync();
 // --- Middleware Pipeline ---
 app.UseNexusPipeline(app.Environment);
 
+app.MapMcp();
 app.MapControllers();
 app.Run();

backend/Repositories/ActivityRepository.cs

@@ -3,7 +3,7 @@ using Nexus.Api.Data;
 
 namespace Nexus.Api.Repositories;
 
-public sealed class ActivityRepository(NexusDbContext db) : IActivityRepository
+public sealed class ActivityRepository(NexusDbContext db, Nexus.Api.Services.ILiveUpdateService liveUpdates) : IActivityRepository
 {
     public Task<List<ActivityEvent>> GetRecentAsync(int take, CancellationToken ct = default)
         => db.Activity.AsNoTracking().OrderByDescending(x => x.CreatedAt).Take(take).ToListAsync(ct);
@@ -39,17 +39,35 @@ public sealed class ActivityRepository(NexusDbContext db) : IActivityRepository
         return (items, totalCount);
     }
 
-    public Task<List<ActivityEvent>> GetByAgentAsync(string agentId, int take, CancellationToken ct = default)
-        => db.Activity.AsNoTracking()
-            .Where(x => x.Message.Contains(agentId, StringComparison.OrdinalIgnoreCase) || x.Type == "agent")
+    public async Task<List<ActivityEvent>> GetByAgentAsync(string agentId, int take, CancellationToken ct = default)
+    {
+        var candidateCount = Math.Max(take * 8, 100);
+        var recent = await db.Activity.AsNoTracking()
             .OrderByDescending(x => x.CreatedAt)
-            .Take(take)
+            .Take(candidateCount)
             .ToListAsync(ct);
 
+        return recent
+            .Where(x => Nexus.Api.Services.AgentActivityText.MatchesAgent(x.Message, agentId))
+            .Take(take)
+            .ToList();
+    }
+
     public async Task<ActivityEvent> AddAsync(ActivityEvent activity, CancellationToken ct = default)
     {
+        var agentIds = Nexus.Api.Services.AgentActivityText.ExtractAgentIds(activity.Message);
+        activity.Message = Nexus.Api.Services.AgentActivityText.RedactForDisplay(activity.Message);
         db.Activity.Add(activity);
         await db.SaveChangesAsync(ct);
+        liveUpdates.Publish("activity.created", new
+        {
+            activity.Id,
+            activity.Type,
+            activity.Message,
+            activity.TaskId,
+            activity.CreatedAt,
+            agentIds
+        }, "activity");
         return activity;
     }
 }

backend/Repositories/ITaskRepository.cs

@@ -8,6 +8,7 @@ public interface ITaskRepository
     ValueTask<WorkTask?> GetByIdAsync(Guid id, CancellationToken ct = default);
     Task<List<WorkTask>> GetPendingApprovalAsync(CancellationToken ct = default);
     Task<WorkTask> AddAsync(WorkTask task, CancellationToken ct = default);
+    Task<bool> TryResetStaleInProgressToBacklogAsync(Guid id, DateTimeOffset staleBefore, DateTimeOffset updatedAt, CancellationToken ct = default);
     Task UpdateAsync(WorkTask task, CancellationToken ct = default);
     Task DeleteAsync(WorkTask task, CancellationToken ct = default);
     Task<int> CountAsync(CancellationToken ct = default);

backend/Repositories/TaskRepository.cs

@@ -27,6 +27,41 @@ public sealed class TaskRepository(NexusDbContext db) : ITaskRepository
         return task;
     }
 
+    public async Task<bool> TryResetStaleInProgressToBacklogAsync(
+        Guid id,
+        DateTimeOffset staleBefore,
+        DateTimeOffset updatedAt,
+        CancellationToken ct = default)
+    {
+        if (!db.Database.IsRelational())
+        {
+            var task = await db.Tasks
+                .FirstOrDefaultAsync(task => task.Id == id
+                                             && task.State == TaskStateHelper.ToStateString(TaskState.InProgress)
+                                             && task.UpdatedAt < staleBefore, ct);
+
+            if (task is null)
+            {
+                return false;
+            }
+
+            task.State = TaskStateHelper.ToStateString(TaskState.Backlog);
+            task.UpdatedAt = updatedAt;
+            await db.SaveChangesAsync(ct);
+            return true;
+        }
+
+        var affectedRows = await db.Tasks
+            .Where(task => task.Id == id
+                           && task.State == TaskStateHelper.ToStateString(TaskState.InProgress)
+                           && task.UpdatedAt < staleBefore)
+            .ExecuteUpdateAsync(setters => setters
+                .SetProperty(task => task.State, TaskStateHelper.ToStateString(TaskState.Backlog))
+                .SetProperty(task => task.UpdatedAt, updatedAt), ct);
+
+        return affectedRows > 0;
+    }
+
     public async Task UpdateAsync(WorkTask task, CancellationToken ct = default)
     {
         task.UpdatedAt = DateTimeOffset.UtcNow;

backend/Services/AgentActivityText.cs

@@ -0,0 +1,89 @@
+using System.Collections.Concurrent;
+using System.Text.RegularExpressions;
+
+namespace Nexus.Api.Services;
+
+public static class AgentActivityText
+{
+    private static readonly (Regex Pattern, string Replacement)[] InlineRedactions =
+    [
+        (new Regex(@"(?i)(authorization\s*:\s*bearer)\s+\S+", RegexOptions.CultureInvariant), "$1 [redacted]"),
+        (new Regex(@"(?i)(x-nexus-api-key\s*:\s*)\S+", RegexOptions.CultureInvariant), "$1[redacted]"),
+        (new Regex(@"(?i)(api[_-]?key\s*[:=]\s*)\S+", RegexOptions.CultureInvariant), "$1[redacted]"),
+        (new Regex(@"(?i)(token\s*[:=]\s*)\S+", RegexOptions.CultureInvariant), "$1[redacted]"),
+        (new Regex(@"(?i)(password\s*[:=]\s*)\S+", RegexOptions.CultureInvariant), "$1[redacted]"),
+        (new Regex(@"(?i)(secret\s*[:=]\s*)\S+", RegexOptions.CultureInvariant), "$1[redacted]"),
+        (new Regex(@"(?i)(jwt\s*[:=]\s*)\S+", RegexOptions.CultureInvariant), "$1[redacted]"),
+        (new Regex(@"(?i)(private[_-]?key\s*[:=]\s*)\S+", RegexOptions.CultureInvariant), "$1[redacted]")
+    ];
+
+    private static readonly Regex[] ResidualSensitivePatterns =
+    [
+        new(@"(?i)bearer\s+(?!\[redacted\])\S+", RegexOptions.CultureInvariant),
+        new(@"(?i)x-nexus-api-key\s*:\s*(?!\[redacted\])\S+", RegexOptions.CultureInvariant),
+        new(@"(?i)private[_-]?key\s*[:=]\s*(?!\[redacted\])\S+", RegexOptions.CultureInvariant)
+    ];
+
+    private static readonly string[] KnownActorIds =
+    [
+        .. AgentIdentityCatalog.DefaultConfiguredAgentIds,
+        "bao",
+        "nexus-system"
+    ];
+
+    public static string RedactForDisplay(string? content)
+    {
+        if (string.IsNullOrWhiteSpace(content))
+            return content ?? string.Empty;
+
+        var lines = content.Split('\n');
+        for (var i = 0; i < lines.Length; i++)
+        {
+            var sanitized = lines[i];
+            foreach (var (pattern, replacement) in InlineRedactions)
+            {
+                sanitized = pattern.Replace(sanitized, replacement);
+            }
+
+            if (ResidualSensitivePatterns.Any(pattern => pattern.IsMatch(sanitized)))
+                sanitized = "[redacted sensitive line]";
+
+            lines[i] = sanitized;
+        }
+
+        return string.Join('\n', lines).Trim();
+    }
+
+    public static bool MatchesAgent(string? content, string agentId)
+    {
+        if (string.IsNullOrWhiteSpace(agentId))
+            return false;
+
+        var normalized = agentId.Trim().ToLowerInvariant();
+        return ExtractAgentIds(content).Contains(normalized, StringComparer.OrdinalIgnoreCase);
+    }
+
+    public static string[] ExtractAgentIds(string? content)
+    {
+        if (string.IsNullOrWhiteSpace(content))
+            return [];
+
+        var matches = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+        foreach (var actorId in KnownActorIds)
+        {
+            if (BuildActorRegex(actorId).IsMatch(content))
+                matches.Add(actorId);
+        }
+
+        return matches
+            .Select(actorId => actorId.ToLowerInvariant())
+            .OrderBy(actorId => actorId, StringComparer.Ordinal)
+            .ToArray();
+    }
+
+    private static Regex BuildActorRegex(string actorId)
+        => ActorPatternCache.GetOrAdd(actorId, static key =>
+            new Regex($@"(?<![a-z0-9]){Regex.Escape(key)}(?![a-z0-9])", RegexOptions.IgnoreCase | RegexOptions.CultureInvariant));
+
+    private static readonly ConcurrentDictionary<string, Regex> ActorPatternCache = new(StringComparer.OrdinalIgnoreCase);
+}

backend/Services/AgentConfigService.cs

@@ -1,3 +1,4 @@
+using System.Text.Json;
 using Nexus.Api.Helpers;
 
 namespace Nexus.Api.Services;
@@ -27,6 +28,8 @@ public sealed class AgentConfigService : IAgentConfigService
     {
         if (!PathSecurityHelper.IsValidConfigFileName(fileName))
             return null;
+        if (!AllowedFiles.Contains(fileName))
+            return null;
 
         var workspacePath = $"/mnt/workspace-{agentId}";
         if (!PathSecurityHelper.TryResolveSafePath(workspacePath, fileName, out var safePath) || !File.Exists(safePath))
@@ -37,18 +40,44 @@ public sealed class AgentConfigService : IAgentConfigService
         return new AgentConfigFileContent(fileName, content, fi.Length, fi.LastWriteTimeUtc);
     }
 
-    public async Task<AgentConfigFileSaveResult?> SaveConfigFileAsync(string agentId, string fileName, string content, CancellationToken ct = default)
+    public async Task<AgentConfigSaveAttempt> SaveConfigFileAsync(string agentId, string fileName, string content, CancellationToken ct = default)
     {
-        if (!PathSecurityHelper.IsValidConfigFileName(fileName))
-            return null;
+        var fileKind = DetermineFileKind(fileName);
+        var validation = Validate(fileName, content, fileKind);
+        var backup = new AgentConfigBackupResult("not_applicable", BackupCreated: false);
+        var reload = CreateReloadCheck();
+        if (validation.Errors.Count > 0)
+            return new AgentConfigSaveAttempt(null, new AgentConfigSaveFailure("validation_failed", validation, backup, reload));
 
         var workspacePath = $"/mnt/workspace-{agentId}";
+        if (!Directory.Exists(workspacePath))
+            return new AgentConfigSaveAttempt(
+                null,
+                new AgentConfigSaveFailure(
+                    "workspace_not_found",
+                    new AgentConfigValidationResult("failed", fileKind, ["Agent workspace is not available on this node."]),
+                    backup,
+                    reload));
+
         if (!PathSecurityHelper.TryResolveSafePath(workspacePath, fileName, out var safePath))
-            return null;
+            return new AgentConfigSaveAttempt(
+                null,
+                new AgentConfigSaveFailure(
+                    "invalid_path",
+                    new AgentConfigValidationResult("failed", fileKind, ["Invalid filename or path."]),
+                    backup,
+                    reload));
 
         var tempPath = safePath + ".tmp";
+        var backupPath = safePath + ".bak";
+        var backupCreated = false;
         try
         {
+            if (File.Exists(safePath))
+            {
+                File.Copy(safePath, backupPath, overwrite: true);
+                backupCreated = true;
+            }
             await File.WriteAllTextAsync(tempPath, content, ct);
             File.Move(tempPath, safePath!, overwrite: true);
         }
@@ -59,6 +88,60 @@ public sealed class AgentConfigService : IAgentConfigService
         }
 
         var fi = new FileInfo(safePath!);
-        return new AgentConfigFileSaveResult(fileName, fi.Length, fi.LastWriteTimeUtc);
+        return new AgentConfigSaveAttempt(
+            new AgentConfigFileSaveResult(
+                fileName,
+                fi.Length,
+                fi.LastWriteTimeUtc,
+                new AgentConfigValidationResult("passed", fileKind, []),
+                new AgentConfigBackupResult(backupCreated ? "created" : "not_applicable", backupCreated),
+                CreateReloadCheck()),
+            null);
     }
+
+    private static AgentConfigValidationResult Validate(string fileName, string content, string fileKind)
+    {
+        var errors = new List<string>();
+
+        if (!PathSecurityHelper.IsValidConfigFileName(fileName))
+            errors.Add("Filename is invalid.");
+        else if (!AllowedFiles.Contains(fileName))
+            errors.Add("File is not allowed for Mission Control editing.");
+
+        if (content.IndexOf('\0') >= 0)
+            errors.Add("Content contains null bytes.");
+
+        if (content.Length > IAgentConfigService.MaxConfigFileBytes)
+            errors.Add($"Content exceeds maximum size of {IAgentConfigService.MaxConfigFileBytes / 1024}KB.");
+
+        if (string.Equals(fileKind, "json", StringComparison.OrdinalIgnoreCase))
+        {
+            try
+            {
+                JsonDocument.Parse(content);
+            }
+            catch (JsonException ex)
+            {
+                errors.Add($"JSON validation failed: {ex.Message}");
+            }
+        }
+
+        return new AgentConfigValidationResult(errors.Count == 0 ? "passed" : "failed", fileKind, errors);
+    }
+
+    private static string DetermineFileKind(string fileName)
+    {
+        if (fileName.EndsWith(".json", StringComparison.OrdinalIgnoreCase))
+            return "json";
+
+        if (fileName.EndsWith(".md", StringComparison.OrdinalIgnoreCase))
+            return "markdown";
+
+        return "text";
+    }
+
+    private static AgentConfigReloadCheckResult CreateReloadCheck()
+        => new(
+            "not_supported",
+            "Mission Control verified the file write locally, but agent hot reload is not available for workspace config files.");
 }

backend/Services/DashboardService.cs

@@ -112,6 +112,19 @@ public sealed class DashboardService(
         }
     }
 
+    public async Task<GatewayRuntimeInfo> GetGatewayInfoAsync(CancellationToken ct)
+    {
+        try
+        {
+            return await gateway.GetGatewayInfoAsync(ct);
+        }
+        catch (Exception ex)
+        {
+            logger.LogWarning(ex, "Gateway info fetch failed");
+            return new GatewayRuntimeInfo(false, "unknown", null, null, false, false, "error", DateTimeOffset.UtcNow, "Gateway nicht erreichbar", "Gateway nicht erreichbar");
+        }
+    }
+
     public async Task<QueueDeleteResult> DeleteQueueItemAsync(string id, string? source, CancellationToken ct)
     {
         if (string.Equals(source, "cron", StringComparison.OrdinalIgnoreCase))

backend/Services/IAgentConfigService.cs

@@ -4,11 +4,38 @@ public sealed record AgentConfigFileInfo(string FileName, long Size, DateTime Mo
 
 public sealed record AgentConfigFileContent(string FileName, string Content, long Size, DateTime ModifiedAt);
 
-public sealed record AgentConfigFileSaveResult(string FileName, long Size, DateTime ModifiedAt);
+public sealed record AgentConfigValidationResult(string Status, string FileKind, IReadOnlyList<string> Errors);
+
+public sealed record AgentConfigBackupResult(string Status, bool BackupCreated);
+
+public sealed record AgentConfigReloadCheckResult(string Status, string Message);
+
+public sealed record AgentConfigFileSaveResult(
+    string FileName,
+    long Size,
+    DateTime ModifiedAt,
+    AgentConfigValidationResult Validation,
+    AgentConfigBackupResult Backup,
+    AgentConfigReloadCheckResult ReloadCheck
+);
+
+public sealed record AgentConfigSaveFailure(
+    string Code,
+    AgentConfigValidationResult Validation,
+    AgentConfigBackupResult Backup,
+    AgentConfigReloadCheckResult ReloadCheck
+);
+
+public sealed record AgentConfigSaveAttempt(
+    AgentConfigFileSaveResult? SaveResult,
+    AgentConfigSaveFailure? Failure
+);
 
 public interface IAgentConfigService
 {
+    const int MaxConfigFileBytes = 500 * 1024;
+
     IReadOnlyList<AgentConfigFileInfo> GetConfigFiles(string agentId);
     Task<AgentConfigFileContent?> GetConfigFileAsync(string agentId, string fileName, CancellationToken ct = default);
-    Task<AgentConfigFileSaveResult?> SaveConfigFileAsync(string agentId, string fileName, string content, CancellationToken ct = default);
+    Task<AgentConfigSaveAttempt> SaveConfigFileAsync(string agentId, string fileName, string content, CancellationToken ct = default);
 }

backend/Services/IDashboardService.cs

@@ -16,6 +16,7 @@ public interface IDashboardService
     Task<ChatResponse> SendChatAsync(string agentId, string message);
     Task<List<MessageEntry>> GetMessagesAsync(string? sessionKey, int limit, int offset);
     Task<List<QueueItem>> GetQueueAsync(CancellationToken ct);
+    Task<GatewayRuntimeInfo> GetGatewayInfoAsync(CancellationToken ct);
     Task<QueueDeleteResult> DeleteQueueItemAsync(string id, string? source, CancellationToken ct);
     Task<QueuePriorityResult> CycleQueuePriorityAsync(string id, CancellationToken ct);
     Task<AgentModelInfo?> GetAgentModelAsync(string agentId);

backend/Services/IOpenClawGatewayClient.cs

@@ -12,6 +12,7 @@ public interface IOpenClawGatewayClient
     Task<List<FeedEntry>> GetAllAgentOperationsAsync(int limit = 30);
     Task<ChatResponse> SendChatMessageAsync(string agentId, string message);
     Task<List<QueueItem>> GetQueueAsync();
+    Task<GatewayRuntimeInfo> GetGatewayInfoAsync(CancellationToken ct = default);
     Task<bool> DeleteCronJobAsync(string id);
     Task<AgentModelInfo?> GetAgentModelAsync(string agentId);
     Task<bool> SetAgentModelAsync(string agentId, string model);

backend/Services/IStaleTaskRecoveryService.cs

@@ -0,0 +1,6 @@
+namespace Nexus.Api.Services;
+
+public interface IStaleTaskRecoveryService
+{
+    Task<int> ResetStaleInProgressTasksAsync(TimeSpan staleThreshold, CancellationToken ct = default);
+}

backend/Services/NexusMcpTools.cs

@@ -0,0 +1,232 @@
+using System.ComponentModel;
+using System.Security.Claims;
+using ModelContextProtocol.Server;
+using Nexus.Api.Controllers;
+using Nexus.Api.Data;
+using Nexus.Api.Models;
+
+namespace Nexus.Api.Services;
+
+[McpServerToolType]
+public sealed class NexusMcpTools(
+    ITaskBridgeService bridge,
+    IAgentService agentService,
+    IHttpContextAccessor httpContextAccessor,
+    IConfiguration configuration,
+    ILogger<NexusMcpTools> logger)
+{
+    [McpServerTool(Name = "nexus_get_board")]
+    [Description("Get the full Nexus task board grouped by canonical states.")]
+    public async Task<BoardResponse> GetBoard(CancellationToken ct = default)
+    {
+        await ResolveCallerAsync(ct);
+        return await bridge.GetBoardAsync(ct);
+    }
+
+    [McpServerTool(Name = "nexus_agent_overview")]
+    [Description("Get agent workflow overview, including waiting and stale task groups.")]
+    public async Task<AgentWorkflowOverview> GetAgentOverview(
+        [Description("Stale threshold in hours. Defaults to 2.")]
+        int staleHours = 2,
+        CancellationToken ct = default)
+    {
+        await ResolveCallerAsync(ct);
+        return await bridge.GetAgentOverviewAsync(TimeSpan.FromHours(Math.Max(1, staleHours)), ct);
+    }
+
+    [McpServerTool(Name = "nexus_get_task")]
+    [Description("Get one Nexus task by ID.")]
+    public async Task<TaskBridgeCommandResponse<DashboardTaskDto>> GetTask(Guid taskId, CancellationToken ct = default)
+    {
+        await ResolveCallerAsync(ct);
+        return ToResponse(await bridge.GetTaskAsync(taskId, ct), "nexus_get_task");
+    }
+
+    [McpServerTool(Name = "nexus_get_children")]
+    [Description("Get child tasks for a Nexus parent task.")]
+    public async Task<IReadOnlyList<DashboardTaskDto>> GetChildren(Guid parentTaskId, CancellationToken ct = default)
+    {
+        await ResolveCallerAsync(ct);
+        return await bridge.GetChildTasksAsync(parentTaskId, ct);
+    }
+
+    [McpServerTool(Name = "nexus_get_activity")]
+    [Description("Get activity entries for a Nexus task.")]
+    public async Task<IReadOnlyList<ActivityEntryDto>> GetActivity(Guid taskId, CancellationToken ct = default)
+    {
+        await ResolveCallerAsync(ct);
+        var activity = await bridge.GetTaskActivityAsync(taskId, ct);
+        return activity.Select(entry => new ActivityEntryDto(entry.Id, entry.Type, entry.Message, entry.CreatedAt)).ToList();
+    }
+
+    [McpServerTool(Name = "nexus_create_task")]
+    [Description("Create a top-level Nexus task.")]
+    public async Task<TaskBridgeCommandResponse<DashboardTaskDto>> CreateTask(
+        string title,
+        string? detail = null,
+        string? priority = "Normal",
+        string? assignedTo = null,
+        CancellationToken ct = default)
+    {
+        var caller = await ResolveCallerAsync(ct);
+        var result = await bridge.CreateTaskAsync(
+            title: title,
+            detail: detail,
+            source: ResolveSource(caller),
+            priority: priority,
+            assignedTo: assignedTo ?? caller,
+            ct: ct);
+
+        return ToResponse(result, "nexus_create_task");
+    }
+
+    [McpServerTool(Name = "nexus_create_child_task")]
+    [Description("Create a visible child task under a Nexus parent task for delegation.")]
+    public async Task<TaskBridgeCommandResponse<DashboardTaskDto>> CreateChildTask(
+        Guid parentTaskId,
+        string title,
+        string? detail = null,
+        string? priority = "Normal",
+        string? assignedTo = null,
+        string? expectedFrom = null,
+        bool startsInProgress = false,
+        CancellationToken ct = default)
+    {
+        var caller = await ResolveCallerAsync(ct);
+        var result = await bridge.CreateChildTaskAsync(
+            parentTaskId: parentTaskId,
+            title: title,
+            detail: detail,
+            source: ResolveSource(caller),
+            priority: priority,
+            assignedTo: assignedTo,
+            expectedFrom: expectedFrom ?? assignedTo,
+            startsInProgress: startsInProgress,
+            ct: ct);
+
+        return ToResponse(result, "nexus_create_child_task");
+    }
+
+    [McpServerTool(Name = "nexus_update_status")]
+    [Description("Update a Nexus task status. The schema only exposes canonical task states.")]
+    public async Task<TaskBridgeCommandResponse<DashboardTaskDto>> UpdateStatus(
+        Guid taskId,
+        NexusMcpTaskState state,
+        CancellationToken ct = default)
+    {
+        var caller = await ResolveCallerAsync(ct);
+        var result = await bridge.UpdateStatusAsync(taskId, ToStateString(state), caller, ct);
+        return ToResponse(result, "nexus_update_status");
+    }
+
+    [McpServerTool(Name = "nexus_append_activity")]
+    [Description("Append an activity/checkpoint entry to a Nexus task.")]
+    public async Task<TaskBridgeCommandResponse<ActivityEntryDto>> AppendActivity(
+        Guid taskId,
+        string message,
+        string? type = "comment",
+        CancellationToken ct = default)
+    {
+        await ResolveCallerAsync(ct);
+        var result = await bridge.AppendActivityAsync(taskId, message, type, ct);
+        return ToActivityResponse(result, "nexus_append_activity");
+    }
+
+    [McpServerTool(Name = "nexus_handoff")]
+    [Description("Mark a task handoff to another known agent and append handoff activity.")]
+    public async Task<TaskBridgeCommandResponse<DashboardTaskDto>> Handoff(
+        Guid taskId,
+        string targetAgent,
+        string? note = null,
+        CancellationToken ct = default)
+    {
+        await ResolveCallerAsync(ct);
+        var result = await bridge.HandoffAsync(taskId, targetAgent, note, ct);
+        return ToResponse(result, "nexus_handoff");
+    }
+
+    private async Task<string> ResolveCallerAsync(CancellationToken ct)
+    {
+        var context = httpContextAccessor.HttpContext
+            ?? throw new UnauthorizedAccessException("MCP request context is not available.");
+
+        var allowedAgentIds = await agentService.GetAllowedAgentIdsAsync(ct);
+        var allowedActorIds = AgentIdentityCatalog.BuildAllowedActorIds(allowedAgentIds);
+
+        var agentHeader = context.Request.Headers["X-Agent-Id"].FirstOrDefault();
+        if (!string.IsNullOrWhiteSpace(agentHeader))
+        {
+            var normalizedHeader = agentHeader.Trim().ToLowerInvariant();
+            if (allowedActorIds.Contains(normalizedHeader))
+                return normalizedHeader;
+
+            logger.LogWarning("MCP: ignoring unknown X-Agent-Id '{AgentId}' from {Ip}",
+                normalizedHeader,
+                context.Connection.RemoteIpAddress);
+        }
+
+        if (context.User.Identity?.IsAuthenticated == true)
+        {
+            var normalizedClaim = context.User.FindFirst(ClaimTypes.NameIdentifier)?.Value?.Trim().ToLowerInvariant();
+            if (!string.IsNullOrWhiteSpace(normalizedClaim) && allowedActorIds.Contains(normalizedClaim))
+                return normalizedClaim;
+
+            if (context.User.IsInRole("owner") || context.User.IsInRole("admin"))
+                return "bao";
+        }
+
+        if (RequestAuthorizationHelper.IsAuthenticatedService(context, configuration) &&
+            allowedActorIds.Contains("nexus-system"))
+            return "nexus-system";
+
+        logger.LogWarning("MCP: unauthenticated request rejected from {Ip}", context.Connection.RemoteIpAddress);
+        throw new UnauthorizedAccessException("MCP tools require X-Nexus-Api-Key or a recognized X-Agent-Id.");
+    }
+
+    private static string ResolveSource(string agentId) => agentId switch
+    {
+        "bao" or "nexus-system" => "bao",
+        _ => agentId
+    };
+
+    private static string ToStateString(NexusMcpTaskState state) => state switch
+    {
+        NexusMcpTaskState.Backlog => TaskStateHelper.ToStateString(TaskState.Backlog),
+        NexusMcpTaskState.InProgress => TaskStateHelper.ToStateString(TaskState.InProgress),
+        NexusMcpTaskState.Blocked => TaskStateHelper.ToStateString(TaskState.Blocked),
+        NexusMcpTaskState.Done => TaskStateHelper.ToStateString(TaskState.Done),
+        NexusMcpTaskState.Review => TaskStateHelper.ToStateString(TaskState.Review),
+        _ => throw new InvalidEnumArgumentException(nameof(state), (int)state, typeof(NexusMcpTaskState))
+    };
+
+    private static TaskBridgeCommandResponse<T> ToResponse<T>(TaskBridgeResult<T> result, string command) where T : class
+        => new()
+        {
+            Ok = result.Outcome == TaskBridgeOutcome.Success,
+            Command = command,
+            Data = result.Outcome == TaskBridgeOutcome.Success ? result.Data : null,
+            Error = result.Outcome == TaskBridgeOutcome.Success ? null : result.Error ?? result.Outcome.ToString()
+        };
+
+    private static TaskBridgeCommandResponse<ActivityEntryDto> ToActivityResponse(
+        TaskBridgeResult<ActivityEvent> result,
+        string command)
+        => new()
+        {
+            Ok = result.Outcome == TaskBridgeOutcome.Success,
+            Command = command,
+            Data = result.Data is null
+                ? null
+                : new ActivityEntryDto(result.Data.Id, result.Data.Type, result.Data.Message, result.Data.CreatedAt),
+            Error = result.Outcome == TaskBridgeOutcome.Success ? null : result.Error ?? result.Outcome.ToString()
+        };
+}
+
+public enum NexusMcpTaskState
+{
+    Backlog,
+    InProgress,
+    Blocked,
+    Done,
+    Review
+}

backend/Services/OpenClawGatewayClient.cs

@@ -8,6 +8,14 @@ namespace Nexus.Api.Services;
 
 public sealed class OpenClawGatewayClient(HttpClient httpClient, IConfiguration configuration) : IOpenClawGatewayClient
 {
+    private static readonly TimeSpan StaleThreshold = TimeSpan.FromMinutes(15);
+
+    private static readonly string[] SensitiveMarkers =
+    [
+        "api_key", "apikey", "api-key", "authorization", "bearer ", "password",
+        "token", "secret", "x-nexus-api-key", "jwt", "private_key"
+    ];
+
     private static readonly JsonSerializerOptions JsonOptions = new()
     {
         PropertyNameCaseInsensitive = true,
@@ -139,6 +147,7 @@ public sealed class OpenClawGatewayClient(HttpClient httpClient, IConfiguration
             // 3. Extract activity from session_status
             var isActive = false;
             string? currentTask = null;
+            var statusText = status?["status"]?.GetValue<string>();
             if (status is not null)
             {
                 // Check explicit isActive field
@@ -149,7 +158,6 @@ public sealed class OpenClawGatewayClient(HttpClient httpClient, IConfiguration
                     isActive = string.Equals(activeVal.GetValue<string>(), "true", StringComparison.OrdinalIgnoreCase);
 
                 // Fall back to status text
-                var statusText = status["status"]?.GetValue<string>();
                 if (!isActive && statusText is not null)
                     isActive = string.Equals(statusText, "active", StringComparison.OrdinalIgnoreCase)
                             || string.Equals(statusText, "running", StringComparison.OrdinalIgnoreCase);
@@ -191,6 +199,9 @@ public sealed class OpenClawGatewayClient(HttpClient httpClient, IConfiguration
             // 8. Calculate workload from queue items
             var workload = CalculateAgentWorkload(id, queueItems);
 
+            var statusKind = DeriveStatusKind(status, isActive);
+            var statusDetail = DeriveStatusDetail(status, statusKind);
+
             agents.Add(new DashboardAgentInfo(
                 Id: id,
                 Name: string.IsNullOrWhiteSpace(name) ? DeriveRole(id) : name,
@@ -204,7 +215,9 @@ public sealed class OpenClawGatewayClient(HttpClient httpClient, IConfiguration
                 Workload: workload,
                 Goal: goal,
                 RoleBadge: DeriveRoleBadge(id),
-                StatusLabel: DeriveStatusLabel(isActive, status),
+                StatusLabel: DeriveStatusLabel(statusKind, isActive, statusText),
+                StatusKind: statusKind,
+                StatusDetail: statusDetail,
                 Elapsed: FormatElapsed(status),
                 Think: null,
                 Next: DeriveNext(isActive, currentTask)
@@ -692,6 +705,72 @@ public sealed class OpenClawGatewayClient(HttpClient httpClient, IConfiguration
         }
     }
 
+    public async Task<GatewayRuntimeInfo> GetGatewayInfoAsync(CancellationToken ct = default)
+    {
+        var baseUrl = httpClient.BaseAddress?.ToString().TrimEnd('/') ?? "unknown";
+        var requiredVersion = NormalizeOptional(configuration["Integrations:OpenClaw:RequiredVersion"]);
+        try
+        {
+            using var request = new HttpRequestMessage(HttpMethod.Get, "/health");
+            ApplyAuth(request);
+            using var response = await httpClient.SendAsync(request, ct);
+            var body = await response.Content.ReadAsStringAsync(ct);
+            string? version = response.Headers.TryGetValues("X-OpenClaw-Version", out var headerValues)
+                ? headerValues.FirstOrDefault()
+                : null;
+
+            if (string.IsNullOrWhiteSpace(version) && !string.IsNullOrWhiteSpace(body))
+            {
+                try
+                {
+                    using var doc = JsonDocument.Parse(body);
+                    var root = doc.RootElement;
+                    version = TryGetString(root, "version")
+                           ?? TryGetString(root, "gatewayVersion")
+                           ?? TryGetString(root, "openclawVersion");
+                }
+                catch
+                {
+                    // Health endpoint may be plain text.
+                }
+            }
+
+            version = NormalizeOptional(version);
+            var pinned = requiredVersion is not null;
+            var versionStatus = DetermineVersionStatus(response.IsSuccessStatusCode, version, requiredVersion);
+            var matches = versionStatus is "matched" or "unpinned";
+            var message = BuildGatewayMessage(response.IsSuccessStatusCode, versionStatus, requiredVersion);
+            var warning = BuildGatewayWarning(response.IsSuccessStatusCode, versionStatus, version, requiredVersion, null);
+
+            return new GatewayRuntimeInfo(
+                response.IsSuccessStatusCode,
+                baseUrl,
+                version,
+                requiredVersion,
+                pinned,
+                response.IsSuccessStatusCode && matches,
+                versionStatus,
+                DateTimeOffset.UtcNow,
+                message,
+                warning);
+        }
+        catch
+        {
+            var warning = BuildGatewayWarning(false, "error", null, requiredVersion, "Gateway nicht erreichbar");
+            return new GatewayRuntimeInfo(
+                false,
+                baseUrl,
+                null,
+                requiredVersion,
+                requiredVersion is not null,
+                false,
+                "error",
+                DateTimeOffset.UtcNow,
+                "Gateway nicht erreichbar",
+                warning);
+        }
+    }
+
     public async Task<bool> DeleteCronJobAsync(string id)
     {
         try
@@ -980,13 +1059,14 @@ public sealed class OpenClawGatewayClient(HttpClient httpClient, IConfiguration
                     continue;
 
                 // Truncate content to first 200 chars for compact display
-                var text = msg.Content.Length > 200
-                    ? msg.Content[..200] + "…"
-                    : msg.Content;
+                var redacted = AgentActivityText.RedactForDisplay(msg.Content);
+                var text = redacted.Length > 200
+                    ? redacted[..200] + "…"
+                    : redacted;
                 var ts = ParseTimestamp(msg.Timestamp);
                 var timeAgo = FormatTimeAgo(ts);
 
-                entries.Add(new AgentActivityEntry(timeAgo, text));
+                entries.Add(new AgentActivityEntry(timeAgo, text, ts));
             }
         }
         catch
@@ -1076,25 +1156,83 @@ public sealed class OpenClawGatewayClient(HttpClient httpClient, IConfiguration
         _ => "badge-slate"
     };
 
-    private static string DeriveStatusLabel(bool isActive, JsonNode? status)
+    private static string DeriveStatusLabel(string statusKind, bool isActive, string? statusText)
     {
-        if (!isActive) return "Bereit";
-        var statusText = status?["status"]?.GetValue<string>()?.ToLowerInvariant();
-        return statusText switch
+        return statusKind switch
         {
-            "thinking" or "think" => "Plant",
-            "blocked" or "block" => "Blockiert",
-            _ => "Arbeitet"
+            "connected" => isActive ? "Arbeitet" : "Verbunden",
+            "thinking" => "Plant",
+            "blocked" => "Blockiert",
+            "stale" => "Stale",
+            "error" => "Fehler",
+            "unsupported" => "Unsupported",
+            "ready" => "Bereit",
+            _ => statusText?.ToLowerInvariant() switch
+            {
+                "thinking" or "think" => "Plant",
+                "blocked" or "block" => "Blockiert",
+                _ => isActive ? "Arbeitet" : "Bereit"
+            }
+        };
+    }
+
+    private static string DeriveStatusKind(JsonNode? status, bool isActive)
+    {
+        if (status is null)
+            return "error";
+
+        var statusText = status["status"]?.GetValue<string>()?.Trim();
+        var errorText = status["error"]?.GetValue<string>()?.Trim()
+            ?? status["message"]?.GetValue<string>()?.Trim();
+        var normalized = statusText?.ToLowerInvariant();
+        var detail = $"{statusText} {errorText}".Trim().ToLowerInvariant();
+
+        if (detail.Contains("unsupported", StringComparison.Ordinal))
+            return "unsupported";
+        if (!string.IsNullOrWhiteSpace(errorText)
+            || normalized is "error" or "failed" or "offline" or "disconnected" or "unreachable")
+            return "error";
+        if (normalized is "blocked" or "block")
+            return "blocked";
+        if (normalized is "thinking" or "think")
+            return "thinking";
+
+        var lastActivity = TryGetStatusTimestamp(status);
+        if (lastActivity is not null && DateTimeOffset.UtcNow - lastActivity.Value > StaleThreshold)
+            return "stale";
+
+        if (isActive || normalized is "active" or "running" or "connected" or "online")
+            return "connected";
+
+        return "ready";
+    }
+
+    private static string? DeriveStatusDetail(JsonNode? status, string statusKind)
+    {
+        if (status is null)
+            return "Gateway-Status nicht abrufbar";
+
+        var message = NormalizeOptional(status["message"]?.GetValue<string>())
+            ?? NormalizeOptional(status["error"]?.GetValue<string>())
+            ?? NormalizeOptional(status["detail"]?.GetValue<string>());
+
+        if (message is not null)
+            return message;
+
+        return statusKind switch
+        {
+            "stale" => FormatStaleDetail(TryGetStatusTimestamp(status)),
+            "unsupported" => "Session meldet einen nicht unterstützten Zustand",
+            "error" => "Session-Status konnte nicht gelesen werden",
+            _ => null
         };
     }
 
     private static string? FormatElapsed(JsonNode? status)
     {
-        var lastActivity = status?["lastActivity"]?.GetValue<string>()
-                        ?? status?["lastMessage"]?.GetValue<string>();
+        var lastActivity = TryGetStatusTimestamp(status);
         if (lastActivity is null) return null;
-        if (!DateTimeOffset.TryParse(lastActivity, out var ts)) return null;
-        var diff = DateTimeOffset.UtcNow - ts;
+        var diff = DateTimeOffset.UtcNow - lastActivity.Value;
         if (diff.TotalSeconds < 60) return $"{(int)diff.TotalSeconds}s";
         if (diff.TotalMinutes < 60) return $"{(int)diff.TotalMinutes}m";
         if (diff.TotalHours < 24) return $"{(int)diff.TotalHours}h";
@@ -1120,4 +1258,96 @@ public sealed class OpenClawGatewayClient(HttpClient httpClient, IConfiguration
         "main" => "Assistant",
         _ => "Custom"
     };
+
+    private static string? TryGetString(JsonElement root, string property)
+        => root.ValueKind == JsonValueKind.Object
+        && root.TryGetProperty(property, out var value)
+        && value.ValueKind == JsonValueKind.String
+            ? value.GetString()
+            : null;
+
+    public static string RedactSensitiveText(string content)
+    {
+        if (string.IsNullOrWhiteSpace(content))
+            return content;
+
+        var lines = content.Split('\n');
+        for (var i = 0; i < lines.Length; i++)
+        {
+            var lower = lines[i].ToLowerInvariant();
+            if (SensitiveMarkers.Any(marker => lower.Contains(marker, StringComparison.OrdinalIgnoreCase)))
+            {
+                lines[i] = "[redacted sensitive line]";
+            }
+        }
+
+        return string.Join('\n', lines);
+    }
+
+    private static string? NormalizeOptional(string? value)
+        => string.IsNullOrWhiteSpace(value) ? null : value.Trim();
+
+    private static DateTimeOffset? TryGetStatusTimestamp(JsonNode? status)
+    {
+        var raw = status?["lastActivity"]?.GetValue<string>()
+               ?? status?["lastMessage"]?.GetValue<string>()
+               ?? status?["updatedAt"]?.GetValue<string>();
+        return DateTimeOffset.TryParse(raw, out var ts) ? ts : null;
+    }
+
+    private static string DetermineVersionStatus(bool reachable, string? version, string? requiredVersion)
+    {
+        if (!reachable)
+            return "error";
+        if (requiredVersion is null)
+            return version is null ? "unknown" : "unpinned";
+        if (version is null)
+            return "missing";
+        return string.Equals(version, requiredVersion, StringComparison.OrdinalIgnoreCase) ? "matched" : "drift";
+    }
+
+    private static string BuildGatewayMessage(bool reachable, string versionStatus, string? requiredVersion)
+    {
+        if (!reachable)
+            return "Gateway nicht erreichbar";
+
+        return versionStatus switch
+        {
+            "matched" => "Gateway erreichbar und Version gepinnt",
+            "missing" => requiredVersion is null
+                ? "Gateway erreichbar"
+                : $"Gateway erreichbar, aber Versionspin {requiredVersion} nicht nachweisbar",
+            "drift" => "Gateway erreichbar, aber Version weicht vom Pin ab",
+            "unpinned" => "Gateway erreichbar",
+            "unknown" => "Gateway erreichbar, Version nicht erkannt",
+            _ => "Gateway erreichbar"
+        };
+    }
+
+    private static string? BuildGatewayWarning(bool reachable, string versionStatus, string? version, string? requiredVersion, string? fallback)
+    {
+        if (!reachable)
+            return fallback ?? "Gateway nicht erreichbar";
+
+        return versionStatus switch
+        {
+            "missing" when requiredVersion is not null => $"Gateway meldet keine Version; erwartet wird {requiredVersion}.",
+            "drift" when requiredVersion is not null => $"Gateway meldet {version ?? "unknown"} statt {requiredVersion}.",
+            "unknown" => "Gateway-Version konnte nicht erkannt werden.",
+            _ => null
+        };
+    }
+
+    private static string? FormatStaleDetail(DateTimeOffset? lastActivity)
+    {
+        if (lastActivity is null)
+            return "Letzte Aktivität ist veraltet";
+
+        var diff = DateTimeOffset.UtcNow - lastActivity.Value;
+        if (diff.TotalMinutes < 60)
+            return $"Keine neue Aktivität seit {(int)diff.TotalMinutes}m";
+        if (diff.TotalHours < 24)
+            return $"Keine neue Aktivität seit {(int)diff.TotalHours}h";
+        return $"Keine neue Aktivität seit {(int)diff.TotalDays}d";
+    }
 }

backend/Services/StaleTaskRecoveryBackgroundService.cs

@@ -0,0 +1,46 @@
+using Microsoft.Extensions.Options;
+
+namespace Nexus.Api.Services;
+
+public sealed class StaleTaskRecoveryBackgroundService(
+    IServiceScopeFactory scopeFactory,
+    IOptionsMonitor<StaleTaskRecoveryOptions> optionsMonitor,
+    ILogger<StaleTaskRecoveryBackgroundService> logger) : BackgroundService
+{
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            try
+            {
+                var resetCount = await RunRecoveryOnceAsync(stoppingToken);
+                if (resetCount > 0)
+                    logger.LogInformation("Stale task recovery reset {ResetCount} task(s).", resetCount);
+            }
+            catch (OperationCanceledException) when (stoppingToken.IsCancellationRequested)
+            {
+                break;
+            }
+            catch (Exception ex)
+            {
+                logger.LogError(ex, "Stale task recovery run failed.");
+            }
+
+            try
+            {
+                await Task.Delay(optionsMonitor.CurrentValue.GetInterval(), stoppingToken);
+            }
+            catch (OperationCanceledException) when (stoppingToken.IsCancellationRequested)
+            {
+                break;
+            }
+        }
+    }
+
+    public async Task<int> RunRecoveryOnceAsync(CancellationToken ct = default)
+    {
+        await using var scope = scopeFactory.CreateAsyncScope();
+        var recoveryService = scope.ServiceProvider.GetRequiredService<IStaleTaskRecoveryService>();
+        return await recoveryService.ResetStaleInProgressTasksAsync(optionsMonitor.CurrentValue.GetStaleThreshold(), ct);
+    }
+}

backend/Services/StaleTaskRecoveryOptions.cs

@@ -0,0 +1,13 @@
+namespace Nexus.Api.Services;
+
+public sealed class StaleTaskRecoveryOptions
+{
+    public const string SectionName = "TaskRecovery";
+
+    public int StaleHours { get; set; } = 2;
+    public int IntervalMinutes { get; set; } = 30;
+
+    public TimeSpan GetStaleThreshold() => TimeSpan.FromHours(Math.Max(1, StaleHours));
+
+    public TimeSpan GetInterval() => TimeSpan.FromMinutes(Math.Max(1, IntervalMinutes));
+}

backend/Services/StaleTaskRecoveryService.cs

@@ -0,0 +1,209 @@
+using Nexus.Api.Data;
+using Nexus.Api.Models;
+using Nexus.Api.Repositories;
+
+namespace Nexus.Api.Services;
+
+public sealed class StaleTaskRecoveryService(
+    ITaskRepository taskRepository,
+    IActivityRepository activityRepository,
+    ILiveUpdateService liveUpdateService) : IStaleTaskRecoveryService
+{
+    public async Task<int> ResetStaleInProgressTasksAsync(TimeSpan staleThreshold, CancellationToken ct = default)
+    {
+        var threshold = DateTimeOffset.UtcNow - staleThreshold;
+        var staleTasks = await GetStaleTasksAsync(threshold, ct);
+        if (staleTasks.Count == 0)
+            return 0;
+
+        var latestActivityByTaskId = await GetLatestActivityByTaskIdAsync(staleTasks.Select(task => task.Id), ct);
+        var now = DateTimeOffset.UtcNow;
+        var resetCount = 0;
+
+        foreach (var task in staleTasks)
+        {
+            var currentTask = await taskRepository.GetByIdAsync(task.Id, ct);
+            if (currentTask is null || !IsStaleInProgress(currentTask, threshold))
+                continue;
+
+            latestActivityByTaskId.TryGetValue(currentTask.Id, out var lastActivityAt);
+            var message = BuildActivityMessage(currentTask, staleThreshold, now, lastActivityAt);
+            var updated = await taskRepository.TryResetStaleInProgressToBacklogAsync(
+                currentTask.Id,
+                threshold,
+                now,
+                ct);
+            if (!updated)
+                continue;
+
+            await activityRepository.AddAsync(new ActivityEvent
+            {
+                Type = "task",
+                Message = message,
+                TaskId = task.Id
+            }, ct);
+
+            resetCount++;
+        }
+
+        if (resetCount > 0)
+            liveUpdateService.Publish("tasks.board.snapshot", await BuildBoardSnapshotAsync(ct), "board");
+
+        return resetCount;
+    }
+
+    private async Task<List<WorkTask>> GetStaleTasksAsync(DateTimeOffset threshold, CancellationToken ct)
+    {
+        var allTasks = await taskRepository.GetAllAsync(ct);
+
+        return allTasks
+            .Where(task => IsStaleInProgress(task, threshold))
+            .ToList();
+    }
+
+    private static bool IsStaleInProgress(WorkTask task, DateTimeOffset threshold)
+        => string.Equals(task.State, TaskStateHelper.ToStateString(TaskState.InProgress), StringComparison.OrdinalIgnoreCase)
+           && task.UpdatedAt < threshold;
+
+    private async Task<Dictionary<Guid, DateTimeOffset>> GetLatestActivityByTaskIdAsync(
+        IEnumerable<Guid> taskIds,
+        CancellationToken ct)
+    {
+        var activities = await activityRepository.GetRecentForTasksAsync(taskIds, ct);
+
+        return activities
+            .Where(activity => activity.TaskId.HasValue)
+            .GroupBy(activity => activity.TaskId!.Value)
+            .ToDictionary(group => group.Key, group => group.Max(activity => activity.CreatedAt));
+    }
+
+    private async Task<BoardResponse> BuildBoardSnapshotAsync(CancellationToken ct)
+    {
+        var allTasks = await taskRepository.GetAllAsync(ct);
+        var taskIds = allTasks.Select(task => task.Id).ToList();
+        var activity = await activityRepository.GetRecentForTasksAsync(taskIds, ct);
+
+        var backlog = new List<DashboardTaskDto>();
+        var inProgress = new List<DashboardTaskDto>();
+        var review = new List<DashboardTaskDto>();
+        var blocked = new List<DashboardTaskDto>();
+        var done = new List<DashboardTaskDto>();
+
+        foreach (var task in allTasks)
+        {
+            var dto = MapToDtoWithChildren(task, allTasks, activity);
+            switch (task.State.ToLowerInvariant())
+            {
+                case "backlog": backlog.Add(dto); break;
+                case "in progress": inProgress.Add(dto); break;
+                case "review": review.Add(dto); break;
+                case "blocked": blocked.Add(dto); break;
+                case "done": done.Add(dto); break;
+                default: backlog.Add(dto); break;
+            }
+        }
+
+        backlog.Sort(SortByPriorityThenCreatedAt);
+        inProgress.Sort(SortByPriorityThenCreatedAt);
+        review.Sort(SortByPriorityThenCreatedAt);
+        blocked.Sort(SortByPriorityThenCreatedAt);
+        done.Sort(SortByPriorityThenCreatedAt);
+
+        return new BoardResponse(backlog, inProgress, review, blocked, done);
+    }
+
+    private static DashboardTaskDto MapToDtoWithChildren(
+        WorkTask task,
+        IReadOnlyList<WorkTask> allTasks,
+        IEnumerable<ActivityEvent> activity)
+    {
+        var childTasks = allTasks
+            .Where(candidate => candidate.ParentTaskId == task.Id)
+            .OrderByDescending(candidate => candidate.UpdatedAt)
+            .ToList();
+
+        var childDtos = childTasks.Select(child => MapToDtoWithActivity(child, activity)).ToList();
+        var openChildTaskCount = childTasks.Count(child => !string.Equals(child.State, "Done", StringComparison.OrdinalIgnoreCase));
+        var dto = MapToDtoWithActivity(task, activity);
+
+        return dto with
+        {
+            ChildTasks = childDtos,
+            ChildTaskCount = childDtos.Count,
+            OpenChildTaskCount = openChildTaskCount,
+            HasVisibleDelegation = dto.ParentTaskId.HasValue || childDtos.Count > 0 || dto.IsAgentTask
+        };
+    }
+
+    private static DashboardTaskDto MapToDtoWithActivity(WorkTask task, IEnumerable<ActivityEvent> activity)
+    {
+        var last = activity
+            .Where(entry => entry.TaskId == task.Id)
+            .OrderByDescending(entry => entry.CreatedAt)
+            .FirstOrDefault();
+
+        return new DashboardTaskDto(
+            task.Id,
+            task.Title,
+            task.Detail,
+            task.Source,
+            task.State,
+            task.Priority,
+            task.AssignedTo,
+            task.ParentTaskId,
+            task.DueDate,
+            task.CreatedAt,
+            task.UpdatedAt,
+            task.IsAgentTask,
+            task.ExpectedFrom,
+            last?.Message,
+            last?.CreatedAt,
+            null,
+            0,
+            0,
+            task.ParentTaskId.HasValue || task.IsAgentTask);
+    }
+
+    private static string BuildActivityMessage(
+        WorkTask task,
+        TimeSpan staleThreshold,
+        DateTimeOffset now,
+        DateTimeOffset? lastActivityAt)
+    {
+        var staleAge = now - task.UpdatedAt;
+        var details = new List<string>
+        {
+            "reason=stale-recovery",
+            "previous status In progress",
+            $"stale reference {now:O}",
+            $"stale age {FormatDuration(staleAge)}",
+            $"threshold {FormatDuration(staleThreshold)}"
+        };
+
+        if (lastActivityAt.HasValue)
+            details.Add($"last activity {lastActivityAt.Value:O}");
+
+        details.Add($"last update {task.UpdatedAt:O}");
+        details.Add("new status Backlog");
+
+        return $"Task \"{task.Title}\" reset from In progress to Backlog by stale recovery ({string.Join("; ", details)})";
+    }
+
+    private static string FormatDuration(TimeSpan duration)
+        => duration.ToString(@"dd\.hh\:mm\:ss");
+
+    private static int SortByPriorityThenCreatedAt(DashboardTaskDto a, DashboardTaskDto b)
+    {
+        var priorityCompare = PriorityScore(b.Priority).CompareTo(PriorityScore(a.Priority));
+        return priorityCompare != 0 ? priorityCompare : a.CreatedAt.CompareTo(b.CreatedAt);
+    }
+
+    private static int PriorityScore(string priority) => priority.ToLowerInvariant() switch
+    {
+        "high" => 3,
+        "medium" => 2,
+        "normal" => 2,
+        "low" => 1,
+        _ => 2
+    };
+}

backend/Services/TaskService.cs

@@ -11,7 +11,8 @@ public sealed class TaskService(
     INotificationService notificationService,
     IAgentService agentService,
     IHttpContextAccessor httpContextAccessor,
-    ILiveUpdateService liveUpdateService) : ITaskService
+    ILiveUpdateService liveUpdateService,
+    IStaleTaskRecoveryService staleTaskRecoveryService) : ITaskService
 {
     public async Task<IReadOnlyList<WorkTask>> GetAllAsync(CancellationToken ct = default)
         => await taskRepo.GetAllAsync(ct);
@@ -495,30 +496,8 @@ public sealed class TaskService(
         return ResetStaleInProgressTasksAsync(TimeSpan.FromHours(normalizedHours), ct);
     }
 
-    public async Task<int> ResetStaleInProgressTasksAsync(TimeSpan staleThreshold, CancellationToken ct = default)
-    {
-        var all = await taskRepo.GetAllAsync(ct);
-        var threshold = DateTimeOffset.UtcNow - staleThreshold;
-        var staleTasks = all.Where(t => string.Equals(t.State, "In progress", StringComparison.OrdinalIgnoreCase) && t.UpdatedAt < threshold).ToList();
-
-        foreach (var task in staleTasks)
-        {
-            var prevState = task.State;
-            task.State = "Backlog";
-            await taskRepo.UpdateAsync(task, ct);
-            await activityRepo.AddAsync(new ActivityEvent
-            {
-                Type = "task",
-                Message = $"Task \"{task.Title}\" reset from {prevState} to Backlog (stale)",
-                TaskId = task.Id
-            }, ct);
-        }
-
-        if (staleTasks.Count > 0)
-            await PublishBoardSnapshotAsync(ct);
-
-        return staleTasks.Count;
-    }
+    public Task<int> ResetStaleInProgressTasksAsync(TimeSpan staleThreshold, CancellationToken ct = default)
+        => staleTaskRecoveryService.ResetStaleInProgressTasksAsync(staleThreshold, ct);
 
     public async Task<IReadOnlyList<WorkTask>> GetChildTasksAsync(Guid parentId, CancellationToken ct = default)
     {

backend/appsettings.json

@@ -5,6 +5,7 @@
   "Integrations": {
     "OpenClaw": {
       "BaseUrl": "http://127.0.0.1:18789",
+      "RequiredVersion": "",
       "Token": "",
       "Password": ""
     },
@@ -21,5 +22,9 @@
     "AccessTokenExpirationMinutes": 15,
     "RefreshTokenExpirationDays": 7
   },
+  "TaskRecovery": {
+    "StaleHours": 2,
+    "IntervalMinutes": 30
+  },
   "AllowedHosts": "*"
 }

docs/openclaw-task-board-flow.md

@@ -10,6 +10,7 @@ Diese Datei beschreibt den gewünschten und umgesetzten Arbeitsfluss zwischen:
 - **Sub-Agenten** als ausführende Spezialisten
 - **OpenClaw** als Agent-Runtime
 - **Nexus Task Board** als sichtbare Aufgabenquelle
+- **MCP `/mcp`** als Agent Data Plane fuer Board-Operationen
 
 ---
 
@@ -24,6 +25,8 @@ Das bedeutet:
 - **Child-Task** = konkrete Arbeitsaufgabe für einen Spezial-Agenten
 - **Board** = sichtbare Wahrheit für Aufgabenstatus und Ownership
 - **OpenClaw** = Ausführungspfad für Agentenarbeit
+- **MCP** = bevorzugter Agentenpfad zu Nexus; `/api/bridge` bleibt
+  kompatible interne Fassade, `/api/dashboard` bleibt UI/Admin
 
 ---
 
@@ -57,7 +60,7 @@ flowchart LR
     Iris -->|delegiert konkrete Arbeit| OC
     OC -->|führt Agenten-Task aus| Agents
     Iris -->|legt Child-Tasks an| Board
-    Agents -->|arbeiten gegen Child-Tasks| Board
+    Agents -->|MCP Tools /mcp| Board
     Agents -->|liefern Ergebnis / melden Blocker| Iris
     Iris -->|integriert Ergebnis| Board
     Board -->|Review für Bao| Bao
@@ -89,6 +92,13 @@ flowchart LR
 - liefert Nachrichten, Status und Arbeitsergebnisse zurück
 - ersetzt nicht das Board als Aufgabenwahrheit
 
+### MCP Agent Data Plane
+- stellt `nexus_get_board`, `nexus_agent_overview`, Task-, Child-,
+  Activity-, Status-, Checkpoint- und Handoff-Tools bereit
+- nutzt nur kanonische States: `Backlog`, `In progress`, `Blocked`,
+  `Done`, `Review`
+- ist Fassade ueber `ITaskBridgeService`, keine zweite Board-Domaenenlogik
+
 ### Nexus Task Board
 - ist die **sichtbare operative Quelle** für Aufgaben
 - zeigt Parent-Task, Child-Tasks, Ownership und Status
@@ -315,6 +325,11 @@ Wenn Iris unsicher ist, ob sie eine Child-Task anlegen soll, gilt:
 - Agentenstatus und Boardstatus dürfen sich ergänzen, aber nicht widersprechen
 - Board-Spalten und API-State-Mapping müssen das Parent-/Child-Modell sauber abbilden
 - UI und Doku müssen dieselbe Sprache sprechen
+- Mission-Control-Gateway-Daten bleiben read-only im Browser: Nexus proxyt Status,
+  Version und redigierte Activity; Gateway-Token und direkte Gateway-URLs bleiben
+  im Backend.
+- Config-Writes sind Bao/Owner-only, legen vor dem Austausch ein `.bak` an und
+  schreiben einen `config_audit` Activity-Eintrag.
 
 ---
 

frontend/src/components/ModuleView.vue

@@ -4,7 +4,8 @@ import { Bot, CheckCircle2, Clock3, MessageSquareText, Send, ShieldAlert, Zap, C
 import type { AgentInfo, OperationsSnapshot, RoutingTarget } from '../types'
 import { TASK_STATES } from '../types'
 import { apiFetch } from '../services/api'
-import { useOperationsStore } from '../stores/operations'
+import { useAuthStore } from '../stores/auth'
+import { useOperationsStore, type PendingApprovalTask } from '../stores/operations'
 
 const props = defineProps<{ view: string; snapshot: OperationsSnapshot; routing: RoutingTarget[] }>()
 const emit = defineEmits<{
@@ -13,8 +14,13 @@ const emit = defineEmits<{
   updateTaskState: [id: string, state: string]
 }>()
 const store = useOperationsStore()
+const auth = useAuthStore()
 const agents = ref<AgentInfo[]>([])
 const agentsLoading = ref(false)
+const pendingApprovals = ref<PendingApprovalTask[]>([])
+const pendingApprovalsLoading = ref(false)
+const pendingApprovalsError = ref('')
+const canModerateApprovals = computed(() => auth.user?.role === 'owner')
 
 async function loadAgents() {
   if (agentsLoading.value) return
@@ -23,12 +29,43 @@ async function loadAgents() {
   agentsLoading.value = false
 }
 
+async function loadPendingApprovals() {
+  if (!canModerateApprovals.value) {
+    pendingApprovals.value = []
+    pendingApprovalsError.value = ''
+    return
+  }
+
+  pendingApprovalsLoading.value = true
+  pendingApprovalsError.value = ''
+  try {
+    pendingApprovals.value = await store.fetchPendingApprovals()
+  } catch (e) {
+    pendingApprovalsError.value = e instanceof Error ? e.message : 'Failed to load pending approvals'
+  } finally {
+    pendingApprovalsLoading.value = false
+  }
+}
+
 onMounted(() => {
   if (props.view === 'Agents') loadAgents()
+  if (props.view === 'Task Board') void loadPendingApprovals()
 })
 
 watch(() => props.view, (v) => {
   if (v === 'Agents') loadAgents()
+  if (v === 'Task Board') void loadPendingApprovals()
+})
+
+watch(canModerateApprovals, (value) => {
+  if (props.view !== 'Task Board') return
+  if (value) {
+    void loadPendingApprovals()
+    return
+  }
+
+  pendingApprovals.value = []
+  pendingApprovalsError.value = ''
 })
 
 const newProject = ref('')
@@ -51,6 +88,7 @@ async function handleApproveTask(id: string) {
   taskActionError.value = ''
   try {
     await store.approveTask(id)
+    pendingApprovals.value = pendingApprovals.value.filter(task => task.id !== id)
   } catch (e) {
     taskActionError.value = e instanceof Error ? e.message : 'Failed to approve task'
   } finally {
@@ -63,6 +101,7 @@ async function handleRejectTask(id: string) {
   taskActionError.value = ''
   try {
     await store.rejectTask(id)
+    pendingApprovals.value = pendingApprovals.value.filter(task => task.id !== id)
   } catch (e) {
     taskActionError.value = e instanceof Error ? e.message : 'Failed to reject task'
   } finally {
@@ -187,6 +226,31 @@ async function sendMessage() {
   </div>
 
   <form v-else-if="view === 'Task Board'" class="quick-create" @submit.prevent="newTask.trim() && (emit('createTask', newTask.trim(), 'Normal'), newTask = '')"><input v-model="newTask" placeholder="New task title" /><button>Create task</button></form>
+  <section v-if="view === 'Task Board' && canModerateApprovals" class="approval-strip">
+    <header class="approval-strip-head">
+      <div>
+        <span class="kicker">Owner approvals</span>
+        <h3>Pending approvals</h3>
+      </div>
+      <span class="badge">{{ pendingApprovals.length }}</span>
+    </header>
+    <p v-if="pendingApprovalsLoading" class="approval-strip-note">Loading owner approval queue…</p>
+    <p v-else-if="pendingApprovalsError" class="approval-strip-note error">{{ pendingApprovalsError }}</p>
+    <p v-else-if="!pendingApprovals.length" class="approval-strip-note">No tasks are waiting for Bao approval.</p>
+    <div v-else class="approval-list">
+      <article v-for="task in pendingApprovals" :key="task.id" class="approval-card">
+        <div>
+          <strong>{{ task.title }}</strong>
+          <p>{{ task.priority }} · {{ new Date(task.updatedAt).toLocaleString() }}</p>
+        </div>
+        <div class="approval-actions">
+          <button class="task-approve-btn" :disabled="approvingTaskId === task.id" @click="handleApproveTask(task.id)"><CheckCircle2 :size="13" /></button>
+          <button class="task-reject-btn" :disabled="approvingTaskId === task.id" @click="handleRejectTask(task.id)"><X :size="13" /></button>
+        </div>
+      </article>
+    </div>
+    <p v-if="taskActionError" class="approval-strip-note error">{{ taskActionError }}</p>
+  </section>
   <div v-if="view === 'Task Board'" class="kanban">
     <section v-for="column in columns" :key="column.name" class="kanban-column">
       <header><span>{{ column.name }}</span><b>{{ column.items.length }}</b></header>
@@ -214,7 +278,7 @@ async function sendMessage() {
           <div class="task-card-head">
             <span :class="['priority', task.priority.toLowerCase()]">{{ task.priority }}</span>
             <div class="task-card-actions">
-              <template v-if="task.state === 'In progress'">
+              <template v-if="task.state === 'In progress' && canModerateApprovals">
                 <button
                   class="task-approve-btn"
                   title="Approve"
@@ -338,6 +402,53 @@ async function sendMessage() {
 </template>
 
 <style scoped>
+.approval-strip {
+  margin: 0 0 18px;
+  padding: 14px 16px;
+  border: 1px solid var(--line, #1e2030);
+  border-radius: 14px;
+  background: rgba(255,255,255,.025);
+}
+.approval-strip-head {
+  display: flex;
+  justify-content: space-between;
+  gap: 12px;
+  align-items: center;
+}
+.approval-strip-head h3 {
+  margin: 2px 0 0;
+}
+.approval-strip-note {
+  margin: 10px 0 0;
+  color: #8e96a8;
+}
+.approval-strip-note.error {
+  color: #e16e75;
+}
+.approval-list {
+  display: grid;
+  gap: 10px;
+  margin-top: 12px;
+}
+.approval-card {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  padding: 12px 14px;
+  border: 1px solid rgba(255,255,255,.06);
+  border-radius: 12px;
+  background: rgba(8, 10, 18, .35);
+}
+.approval-card p {
+  margin: 4px 0 0;
+  color: #8e96a8;
+  font-size: 12px;
+}
+.approval-actions {
+  display: flex;
+  gap: 8px;
+}
 .task-card-head {
   display: flex;
   align-items: flex-start;

frontend/src/components/config/ConfigEditor.vue

@@ -10,6 +10,9 @@ defineProps<{
   saving: boolean
   saveStatus: 'idle' | 'saved' | 'error'
   saveMessage: string
+  backupStatus: string
+  reloadStatus: string
+  reloadMessage: string
 }>()
 
 defineEmits<{
@@ -60,6 +63,12 @@ function onInput(event: Event) {
       </div>
     </div>
 
+    <div v-if="reloadMessage" class="editor-health">
+      <span class="health-pill" :class="backupStatus">Backup {{ backupStatus }}</span>
+      <span class="health-pill" :class="reloadStatus">Reload {{ reloadStatus }}</span>
+      <span class="health-note">{{ reloadMessage }}</span>
+    </div>
+
     <!-- Text editor -->
     <textarea
       class="config-editor"
@@ -89,6 +98,17 @@ function onInput(event: Event) {
   border-bottom: 1px solid var(--line, #1e2030);
   gap: 12px;
 }
+.editor-health {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 8px 14px;
+  border-bottom: 1px solid var(--line, #1e2030);
+  background: rgba(255,255,255,.015);
+  color: #8e96a8;
+  font-size: 10.5px;
+  flex-wrap: wrap;
+}
 .editor-file-info {
   display: flex;
   align-items: center;
@@ -165,6 +185,30 @@ function onInput(event: Event) {
   opacity: 0.4;
   cursor: not-allowed;
 }
+.health-pill {
+  display: inline-flex;
+  align-items: center;
+  border: 1px solid var(--line, #1e2030);
+  border-radius: 999px;
+  padding: 2px 8px;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+}
+.health-pill.created {
+  color: #51d49a;
+  border-color: rgba(81,212,154,.3);
+}
+.health-pill.not_applicable {
+  color: #d4b26a;
+  border-color: rgba(212,178,106,.25);
+}
+.health-pill.not_supported {
+  color: #9aa4bb;
+  border-color: rgba(154,164,187,.25);
+}
+.health-note {
+  color: #7e8799;
+}
 
 .config-editor {
   width: 100%;

frontend/src/stores/operations.ts

@@ -2,6 +2,15 @@ import { defineStore } from 'pinia'
 import type { AgentInfo, OperationsSnapshot, RoutingTarget } from '../types'
 import { apiFetch } from '../services/api'
 
+export interface PendingApprovalTask {
+  id: string
+  title: string
+  state: string
+  priority: string
+  projectId?: string | null
+  updatedAt: string
+}
+
 const fallback: OperationsSnapshot = {
   generatedAt: new Date().toISOString(),
   runtime: { runtime: 'OpenClaw', status: 'Unknown', detail: 'Awaiting connection…' },
@@ -22,6 +31,11 @@ export const useOperationsStore = defineStore('operations', {
     connected: false,
   }),
   actions: {
+    async fetchPendingApprovals(): Promise<PendingApprovalTask[]> {
+      const response = await apiFetch('/api/v1/tasks/pending-approval')
+      if (!response.ok) throw new Error('Pending approvals could not be loaded')
+      return await response.json()
+    },
     async createProject(name: string) {
       const response = await apiFetch('/api/v1/projects', {
         method: 'POST',
@@ -145,7 +159,10 @@ export const useOperationsStore = defineStore('operations', {
       const response = await apiFetch(`/api/v1/tasks/${id}/approve`, {
         method: 'POST',
       })
-      if (!response.ok) throw new Error('Task could not be approved')
+      if (!response.ok) {
+        const err = await response.json().catch(() => ({ detail: 'Task could not be approved' }))
+        throw new Error(err.detail || 'Task could not be approved')
+      }
       const index = this.snapshot.tasks.findIndex(task => task.id === id)
       if (index !== -1) {
         this.snapshot.tasks.splice(index, 1)
@@ -161,7 +178,10 @@ export const useOperationsStore = defineStore('operations', {
       const response = await apiFetch(`/api/v1/tasks/${id}/reject`, {
         method: 'POST',
       })
-      if (!response.ok) throw new Error('Task could not be rejected')
+      if (!response.ok) {
+        const err = await response.json().catch(() => ({ detail: 'Task could not be rejected' }))
+        throw new Error(err.detail || 'Task could not be rejected')
+      }
       const index = this.snapshot.tasks.findIndex(task => task.id === id)
       if (index !== -1) {
         this.snapshot.tasks[index] = { ...this.snapshot.tasks[index], state: 'Backlog' }

frontend/src/views/AgentDetailView.vue

@@ -1,11 +1,12 @@
 <script setup lang="ts">
-import { onMounted, ref, computed } from 'vue'
+import { onMounted, onUnmounted, ref, computed } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
-import { ArrowLeft, Bot, Loader2, AlertCircle, Activity } from '@lucide/vue'
+import { ArrowLeft, Bot, Loader2, AlertCircle, Activity, RefreshCw } from '@lucide/vue'
 import { apiFetch } from '../services/api'
 import type { AgentDetail } from '../types'
 import ConfigTabs from '../components/config/ConfigTabs.vue'
 import ConfigEditor from '../components/config/ConfigEditor.vue'
+import { openDashboardLiveStream } from '../services/live'
 
 const route = useRoute()
 const router = useRouter()
@@ -18,6 +19,19 @@ const configFiles = ref<ConfigFileInfo[]>([])
 const activeTab = ref(0)
 const configsLoading = ref(false)
 const configsError = ref('')
+const activityItems = ref<AgentActivityItem[]>([])
+const activityLoading = ref(false)
+const activityError = ref('')
+const summaryLoading = ref(false)
+const summaryError = ref('')
+const summary = ref<AgentSummary | null>(null)
+const liveConnected = ref(false)
+const liveUnavailable = ref(false)
+let liveAbort: AbortController | null = null
+let activityReloadTimer: ReturnType<typeof setTimeout> | null = null
+let liveReconnectTimer: ReturnType<typeof setTimeout> | null = null
+let liveStreamStopped = false
+let lastLiveSequence = 0
 
 const initLoading = ref(true)
 
@@ -28,6 +42,9 @@ interface EditorState {
   dirty: boolean
   saveStatus: 'idle' | 'saved' | 'error'
   saveMessage: string
+  backupStatus: string
+  reloadStatus: string
+  reloadMessage: string
 }
 
 interface ConfigFileInfo {
@@ -40,6 +57,46 @@ interface ConfigFileDetail extends ConfigFileInfo {
   content: string
 }
 
+interface AgentActivityItem {
+  id: number | null
+  type: string
+  message: string
+  at: string
+  source: string
+  relativeTime?: string | null
+}
+
+interface AgentSummary {
+  now: AgentSummaryItem
+  today: AgentSummaryItem
+  generatedAt: string
+}
+
+interface AgentSummaryItem {
+  text: string
+  source: string
+  timestamp?: string | null
+}
+
+interface SaveConfigResult {
+  fileName: string
+  size: number
+  modifiedAt: string
+  validation: {
+    status: string
+    fileKind: string
+    errors: string[]
+  }
+  backup: {
+    status: string
+    backupCreated: boolean
+  }
+  reloadCheck: {
+    status: string
+    message: string
+  }
+}
+
 const editorState = ref<EditorState>({
   content: '',
   savedContent: '',
@@ -47,6 +104,9 @@ const editorState = ref<EditorState>({
   dirty: false,
   saveStatus: 'idle',
   saveMessage: '',
+  backupStatus: 'not_applicable',
+  reloadStatus: 'not_supported',
+  reloadMessage: '',
 })
 
 const agentId = route.params.id as string
@@ -99,6 +159,22 @@ function formatLastSeen(dateStr?: string): string {
   })
 }
 
+function formatActivityTime(item: AgentActivityItem): string {
+  if (item.relativeTime) return item.relativeTime
+  const d = new Date(item.at)
+  return d.toLocaleDateString('de-DE', {
+    month: 'short', day: 'numeric',
+    hour: '2-digit', minute: '2-digit',
+  })
+}
+
+function activityTypeLabel(type: string): string {
+  if (type === 'thinking') return 'Thinking'
+  if (type === 'handoff') return 'Handoff'
+  if (type === 'task') return 'Task'
+  return 'Activity'
+}
+
 async function loadAgent() {
   loading.value = true
   error.value = ''
@@ -113,6 +189,110 @@ async function loadAgent() {
   }
 }
 
+async function loadActivity() {
+  activityLoading.value = true
+  activityError.value = ''
+  try {
+    const response = await apiFetch(`/api/v1/agents/${agentId}/activity`)
+    if (!response.ok) throw new Error('Failed to load activity')
+    activityItems.value = await response.json()
+  } catch (e) {
+    activityError.value = e instanceof Error ? e.message : 'Failed to load activity'
+  } finally {
+    activityLoading.value = false
+  }
+}
+
+async function loadSummary() {
+  summaryLoading.value = true
+  summaryError.value = ''
+  try {
+    const response = await apiFetch(`/api/v1/agents/${agentId}/summary`)
+    if (!response.ok) throw new Error('Failed to load summary')
+    summary.value = await response.json()
+  } catch (e) {
+    summaryError.value = e instanceof Error ? e.message : 'Failed to load summary'
+  } finally {
+    summaryLoading.value = false
+  }
+}
+
+function scheduleActivityReload() {
+  if (activityReloadTimer) return
+  activityReloadTimer = setTimeout(async () => {
+    activityReloadTimer = null
+    await loadActivity()
+    await loadSummary()
+  }, 250)
+}
+
+function formatSummaryTimestamp(value?: string | null): string {
+  if (!value) return 'No timestamp'
+  const d = new Date(value)
+  return d.toLocaleDateString('de-DE', {
+    month: 'short', day: 'numeric',
+    hour: '2-digit', minute: '2-digit',
+  })
+}
+
+function summarySourceLabel(source: string): string {
+  switch (source) {
+    case 'nexus-activity': return 'Nexus activity'
+    case 'gateway-session-history': return 'Gateway history'
+    case 'derived-mixed': return 'Derived from mixed feed'
+    case 'none': return 'No data'
+    default: return source
+  }
+}
+
+function scheduleStreamReconnect() {
+  if (liveStreamStopped || liveReconnectTimer) return
+  liveReconnectTimer = setTimeout(() => {
+    liveReconnectTimer = null
+    void connectActivityStream()
+  }, 1500)
+}
+
+async function connectActivityStream() {
+  liveAbort?.abort()
+  liveAbort = new AbortController()
+
+  try {
+    const stream = await openDashboardLiveStream((event, data) => {
+      const cursor = (data as any)?.cursor
+      if (typeof cursor?.sequence === 'number') lastLiveSequence = cursor.sequence
+
+      if (event === 'snapshot') {
+        liveConnected.value = true
+        liveUnavailable.value = false
+        return
+      }
+
+      if (event !== 'update') return
+      const envelope = (data as any)?.envelope
+      if (envelope?.type !== 'activity.created') return
+
+      const agentIds = Array.isArray(envelope?.payload?.agentIds)
+        ? envelope.payload.agentIds.map((id: unknown) => String(id).toLowerCase())
+        : []
+
+      if (agentIds.includes(agentId.toLowerCase())) {
+        scheduleActivityReload()
+      }
+    }, { signal: liveAbort.signal, afterSequence: lastLiveSequence || null })
+
+    await stream.closed
+    if (!liveStreamStopped) {
+      liveConnected.value = false
+      scheduleStreamReconnect()
+    }
+  } catch {
+    liveConnected.value = false
+    liveUnavailable.value = true
+    if (!liveStreamStopped) scheduleStreamReconnect()
+  }
+}
+
 async function loadConfigFiles() {
   configsLoading.value = true
   configsError.value = ''
@@ -147,6 +327,9 @@ async function loadFileContent(fileName: string) {
       dirty: false,
       saveStatus: 'idle',
       saveMessage: '',
+      backupStatus: 'not_applicable',
+      reloadStatus: 'not_supported',
+      reloadMessage: '',
     }
   } catch (e) {
     editorState.value = {
@@ -156,6 +339,9 @@ async function loadFileContent(fileName: string) {
       dirty: false,
       saveStatus: 'error',
       saveMessage: e instanceof Error ? e.message : `Failed to load ${fileName}`,
+      backupStatus: 'not_applicable',
+      reloadStatus: 'not_supported',
+      reloadMessage: '',
     }
   }
 }
@@ -180,6 +366,9 @@ async function saveFile() {
   editorState.value.saving = true
   editorState.value.saveStatus = 'idle'
   editorState.value.saveMessage = ''
+  editorState.value.backupStatus = 'not_applicable'
+  editorState.value.reloadStatus = 'not_supported'
+  editorState.value.reloadMessage = ''
 
   try {
     const response = await apiFetch(`/api/v1/agents/${agentId}/config/${encodeURIComponent(fileName)}`, {
@@ -190,14 +379,21 @@ async function saveFile() {
 
     if (!response.ok) {
       const err = await response.json().catch(() => ({}))
-      throw new Error((err as any).error || 'Failed to save file')
+      const problem = err as { error?: string; errors?: Record<string, string[]> }
+      const detail = problem.error
+        || Object.values(problem.errors ?? {}).flat().join(' ')
+        || 'Failed to save file'
+      throw new Error(detail)
     }
 
-    const result: { fileName: string; size: number; modifiedAt: string } = await response.json()
+    const result: SaveConfigResult = await response.json()
     editorState.value.savedContent = editorState.value.content
     editorState.value.dirty = false
     editorState.value.saveStatus = 'saved'
-    editorState.value.saveMessage = 'Gespeichert'
+    editorState.value.saveMessage = `Gespeichert · Backup ${result.backup.status}`
+    editorState.value.backupStatus = result.backup.status
+    editorState.value.reloadStatus = result.reloadCheck.status
+    editorState.value.reloadMessage = result.reloadCheck.message
 
     const idx = configFiles.value.findIndex(f => f.fileName === fileName)
     if (idx >= 0) {
@@ -213,19 +409,33 @@ async function saveFile() {
   } catch (e) {
     editorState.value.saveStatus = 'error'
     editorState.value.saveMessage = e instanceof Error ? e.message : 'Failed to save file'
+    editorState.value.backupStatus = 'not_applicable'
+    editorState.value.reloadStatus = 'not_supported'
   } finally {
     editorState.value.saving = false
   }
 }
 
 onMounted(async () => {
+  liveStreamStopped = false
   initLoading.value = true
   await Promise.allSettled([
     loadAgent(),
     loadConfigFiles(),
+    loadActivity(),
+    loadSummary(),
   ])
+  connectActivityStream()
   initLoading.value = false
 })
+
+onUnmounted(() => {
+  liveStreamStopped = true
+  liveAbort?.abort()
+  liveAbort = null
+  if (activityReloadTimer) clearTimeout(activityReloadTimer)
+  if (liveReconnectTimer) clearTimeout(liveReconnectTimer)
+})
 </script>
 
 <template>
@@ -269,6 +479,85 @@ onMounted(async () => {
         </div>
       </div>
 
+      <section class="thinking-section">
+        <header class="section-head">
+          <div>
+            <span class="eyebrow">LIVE</span>
+            <h2>Thinking <span :class="['live-dot', { on: liveConnected }]"></span></h2>
+            <p class="section-note">
+              Nexus activity streams live. Gateway session history remains read-only fallback and refreshes when related Nexus events arrive or on manual reload.
+            </p>
+          </div>
+          <button class="icon-button" :disabled="activityLoading || summaryLoading" @click="Promise.allSettled([loadActivity(), loadSummary()])">
+            <RefreshCw :size="14" :class="{ spin: activityLoading }" />
+          </button>
+        </header>
+
+        <div v-if="summaryLoading && !summary" class="status-message compact">
+          <Loader2 :size="16" class="spin" />
+          Loading summaries...
+        </div>
+
+        <div v-else-if="summaryError && !summary" class="status-message compact error">
+          <AlertCircle :size="16" />
+          {{ summaryError }}
+        </div>
+
+        <div v-else-if="summary" class="summary-row">
+          <div class="summary-card">
+            <span>Now</span>
+            <p>{{ summary.now.text }}</p>
+            <small>{{ summarySourceLabel(summary.now.source) }} · {{ formatSummaryTimestamp(summary.now.timestamp) }}</small>
+          </div>
+          <div class="summary-card">
+            <span>Today</span>
+            <p>{{ summary.today.text }}</p>
+            <small>{{ summarySourceLabel(summary.today.source) }} · {{ formatSummaryTimestamp(summary.today.timestamp) }}</small>
+          </div>
+        </div>
+
+        <div v-else class="status-message compact">
+          No summary available.
+        </div>
+
+        <div v-if="summaryError && summary" class="status-message compact error summary-inline-error">
+          <AlertCircle :size="14" />
+          {{ summaryError }}
+        </div>
+
+        <div v-if="liveUnavailable" class="status-message compact">
+          Live stream reconnecting…
+        </div>
+
+        <div v-if="activityLoading && !activityItems.length" class="status-message compact">
+          <Loader2 :size="16" class="spin" />
+          Loading activity...
+        </div>
+
+        <div v-else-if="activityError" class="status-message compact error">
+          <AlertCircle :size="16" />
+          {{ activityError }}
+        </div>
+
+        <div v-else-if="activityItems.length" class="thinking-list">
+          <article
+            v-for="item in activityItems"
+            :key="`${item.source}-${item.id ?? item.at}-${item.message}`"
+            class="thinking-item"
+          >
+            <div class="thinking-meta">
+              <span class="type-pill">{{ activityTypeLabel(item.type) }}</span>
+              <span>{{ formatActivityTime(item) }}</span>
+            </div>
+            <p>{{ item.message }}</p>
+          </article>
+        </div>
+
+        <div v-else class="status-message compact">
+          No recent activity.
+        </div>
+      </section>
+
       <!-- Config section -->
       <div class="config-section">
         <div v-if="configsLoading" class="status-message">
@@ -297,6 +586,9 @@ onMounted(async () => {
             :saving="editorState.saving"
             :save-status="editorState.saveStatus"
             :save-message="editorState.saveMessage"
+            :backup-status="editorState.backupStatus"
+            :reload-status="editorState.reloadStatus"
+            :reload-message="editorState.reloadMessage"
             @update-content="onContentChange"
             @save="saveFile"
           />
@@ -343,6 +635,9 @@ onMounted(async () => {
 .status-message.error {
   color: #e16e75;
 }
+.status-message.compact {
+  padding: 20px;
+}
 .spin {
   animation: spin 1s linear infinite;
 }
@@ -416,9 +711,144 @@ onMounted(async () => {
 .status-label.mono { font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace; }
 .status-sep { color: #3d4152; font-size: 11px; }
 
+.thinking-section {
+  border: 1px solid var(--line);
+  border-radius: 9px;
+  background: var(--panel);
+  margin-bottom: 16px;
+  overflow: hidden;
+}
+.section-head {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  padding: 14px 16px;
+  border-bottom: 1px solid var(--line);
+}
+.section-head .eyebrow {
+  display: block;
+  font-size: 8.5px;
+  font-weight: 700;
+  letter-spacing: .12em;
+  color: var(--accent, #7b6ef2);
+}
+.section-head h2 {
+  margin: 2px 0 0;
+  color: #e8eaf0;
+  font-size: 13px;
+  font-weight: 600;
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+}
+.section-note {
+  margin: 6px 0 0;
+  color: #6f788b;
+  font-size: 10px;
+  line-height: 1.45;
+  max-width: 560px;
+}
+.live-dot {
+  width: 6px;
+  height: 6px;
+  border-radius: 999px;
+  background: #6b7385;
+}
+.live-dot.on {
+  background: #51d49a;
+}
+.icon-button {
+  width: 30px;
+  height: 30px;
+  border: 1px solid var(--line);
+  border-radius: 7px;
+  background: rgba(255,255,255,.03);
+  color: #9ba3b5;
+  display: grid;
+  place-items: center;
+  cursor: pointer;
+}
+.icon-button:disabled {
+  opacity: .65;
+  cursor: default;
+}
+.thinking-list {
+  display: grid;
+}
+.summary-row {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: 1px;
+  background: rgba(255,255,255,.05);
+  border-bottom: 1px solid var(--line);
+}
+.summary-row > div {
+  background: var(--panel);
+  padding: 12px 16px;
+}
+.summary-card small {
+  display: block;
+  margin-top: 7px;
+  color: #6f788b;
+  font-size: 9.5px;
+  line-height: 1.4;
+}
+.summary-row span {
+  display: block;
+  color: #6f788b;
+  font-size: 9px;
+  font-weight: 700;
+  text-transform: uppercase;
+  margin-bottom: 5px;
+}
+.summary-row p {
+  margin: 0;
+  color: #cbd0dc;
+  font-size: 11px;
+  line-height: 1.5;
+  overflow-wrap: anywhere;
+}
+.thinking-item {
+  padding: 12px 16px;
+  border-bottom: 1px solid rgba(255,255,255,.05);
+}
+.thinking-item:last-child {
+  border-bottom: 0;
+}
+.thinking-meta {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  margin-bottom: 6px;
+  color: #6f788b;
+  font-size: 10px;
+}
+.type-pill {
+  padding: 2px 6px;
+  border-radius: 999px;
+  border: 1px solid rgba(123,110,242,.24);
+  color: #aaa1ff;
+  background: rgba(123,110,242,.08);
+  font-size: 9px;
+}
+.thinking-item p {
+  margin: 0;
+  color: #cbd0dc;
+  font-size: 11px;
+  line-height: 1.55;
+  overflow-wrap: anywhere;
+}
+.summary-inline-error {
+  border-bottom: 1px solid var(--line);
+}
+
 @media (max-width: 640px) {
   .detail-page {
     max-width: 100%;
   }
+  .summary-row {
+    grid-template-columns: 1fr;
+  }
 }
 </style>

frontend/src/views/AgentsIndexView.vue

@@ -1,6 +1,8 @@
 <script setup lang="ts">
+import { computed, onMounted, ref } from 'vue'
 import { useRouter } from 'vue-router'
-import { Bot, Code2, Server, Shield, Search, Terminal, Users } from '@lucide/vue'
+import { Bot, Code2, Server, Shield, Search, Terminal, Users, Wifi, WifiOff } from '@lucide/vue'
+import { apiFetch } from '../services/api'
 
 const router = useRouter()
 
@@ -12,9 +14,27 @@ interface AgentCard {
   tags: string[]
   color: string
   icon: string
+  model?: string
+  statusLabel?: string
+  statusKind?: 'connected' | 'thinking' | 'blocked' | 'ready' | 'stale' | 'error' | 'unsupported'
+  statusDetail?: string | null
+  isActive?: boolean
+  progress?: number
+  currentTask?: string | null
 }
 
-const agents: AgentCard[] = [
+interface GatewayRuntimeInfo {
+  reachable: boolean
+  version?: string | null
+  requiredVersion?: string | null
+  versionPinned: boolean
+  versionMatches: boolean
+  versionStatus: 'matched' | 'drift' | 'missing' | 'unpinned' | 'unknown' | 'error'
+  message?: string | null
+  warning?: string | null
+}
+
+const fallbackAgents: AgentCard[] = [
   {
     id: 'iris',
     name: 'Iris',
@@ -71,6 +91,97 @@ const agents: AgentCard[] = [
   },
 ]
 
+const agents = ref<AgentCard[]>([])
+const gateway = ref<GatewayRuntimeInfo | null>(null)
+const loading = ref(false)
+const error = ref('')
+
+const agentCount = computed(() => agents.value.length)
+const hasAgents = computed(() => agents.value.length > 0)
+const gatewayWarning = computed(() => gateway.value?.warning || '')
+const gatewayLabel = computed(() => {
+  if (!gateway.value) return 'Gateway wird geprüft'
+  if (!gateway.value.reachable) return gateway.value.message || 'Gateway offline'
+  switch (gateway.value.versionStatus) {
+    case 'matched':
+      return `Pinned ${gateway.value.requiredVersion}`
+    case 'drift':
+      return 'Version drift'
+    case 'missing':
+      return 'Version fehlt'
+    case 'unknown':
+      return 'Version unbekannt'
+    case 'unpinned':
+      return gateway.value.version ? `Detected ${gateway.value.version}` : 'Unpinned'
+    default:
+      return gateway.value.message || 'Gateway online'
+  }
+})
+const gatewayChipClass = computed(() => {
+  if (!gateway.value) return 'neutral'
+  if (!gateway.value.reachable) return 'error'
+  if (gateway.value.warning) return 'warn'
+  return 'ok'
+})
+
+async function loadMissionControl() {
+  loading.value = true
+  error.value = ''
+  try {
+    const [agentsResponse, gatewayResponse] = await Promise.all([
+      apiFetch('/api/dashboard/agents'),
+      apiFetch('/api/dashboard/gateway'),
+    ])
+
+    if (agentsResponse.ok) {
+      const data = await agentsResponse.json()
+      agents.value = data.map((item: any) => enrichAgent(item))
+    } else {
+      error.value = await readErrorMessage(agentsResponse, 'Agenten konnten nicht geladen werden')
+    }
+
+    if (gatewayResponse.ok) {
+      gateway.value = await gatewayResponse.json()
+    } else {
+      const gatewayError = await readErrorMessage(gatewayResponse, 'Gateway-Status konnte nicht geladen werden')
+      error.value = error.value ? `${error.value} · ${gatewayError}` : gatewayError
+    }
+  } catch (e) {
+    error.value = e instanceof Error ? e.message : 'Mission Control konnte nicht geladen werden'
+  } finally {
+    loading.value = false
+  }
+}
+
+function enrichAgent(item: any): AgentCard {
+  const fallback = fallbackAgents.find(a => a.id === item.id)
+  return {
+    id: item.id,
+    name: item.name || fallback?.name || item.id,
+    role: item.role || fallback?.role || 'Agent',
+    description: item.description || fallback?.description || 'OpenClaw agent',
+    tags: item.tags?.length ? item.tags : fallback?.tags ?? [],
+    color: fallback?.color ?? '#7e8799',
+    icon: fallback?.icon ?? 'bot',
+    model: item.model,
+    statusLabel: item.statusLabel,
+    statusKind: item.statusKind,
+    statusDetail: item.statusDetail,
+    isActive: item.isActive,
+    progress: item.progress,
+    currentTask: item.currentTask,
+  }
+}
+
+async function readErrorMessage(response: Response, fallback: string) {
+  try {
+    const payload = await response.json()
+    return payload?.error || payload?.message || fallback
+  } catch {
+    return fallback
+  }
+}
+
 function goToAgent(id: string) {
   router.push(`/agents/${id}`)
 }
@@ -86,6 +197,34 @@ function resolveIcon(iconName: string) {
     default: return Bot
   }
 }
+
+function statusTone(agent: AgentCard) {
+  switch (agent.statusKind) {
+    case 'connected': return 'connected'
+    case 'thinking': return 'thinking'
+    case 'blocked': return 'blocked'
+    case 'stale': return 'stale'
+    case 'error': return 'error'
+    case 'unsupported': return 'unsupported'
+    default: return agent.isActive ? 'connected' : 'ready'
+  }
+}
+
+function statusCopy(agent: AgentCard) {
+  if (agent.statusDetail) return agent.statusDetail
+  if (agent.currentTask) return agent.currentTask
+  switch (agent.statusKind) {
+    case 'connected': return 'Session ist erreichbar.'
+    case 'thinking': return 'Agent plant den nächsten Schritt.'
+    case 'blocked': return 'Agent wartet auf Entblockung.'
+    case 'stale': return 'Es gab länger kein neues Signal.'
+    case 'error': return 'Gateway konnte den Session-Status nicht lesen.'
+    case 'unsupported': return 'Session meldet einen nicht unterstützten Zustand.'
+    default: return 'Keine aktive Aufgabe gemeldet.'
+  }
+}
+
+onMounted(loadMissionControl)
 </script>
 
 <template>
@@ -97,16 +236,28 @@ function resolveIcon(iconName: string) {
       </div>
       <div class="header-text">
         <h1>Agents</h1>
-        <p class="header-subtitle">{{ agents.length }} AI agents — each with a real role and a real personality.</p>
+        <p class="header-subtitle">{{ agentCount }} agents · {{ gatewayLabel }}</p>
+      </div>
+      <div class="gateway-chip" :class="gatewayChipClass">
+        <Wifi v-if="gateway?.reachable" :size="13" />
+        <WifiOff v-else :size="13" />
+        {{ gateway?.version || gatewayLabel }}
       </div>
     </div>
 
+    <div v-if="loading" class="load-error">Lade Gateway-Status...</div>
+    <div v-else-if="error" class="load-error">{{ error }}</div>
+    <div v-if="gatewayWarning" class="gateway-warning">
+      {{ gatewayWarning }}
+    </div>
+
     <!-- Agent grid -->
-    <div class="agents-grid">
+    <div v-if="hasAgents" class="agents-grid">
       <article
         v-for="agent in agents"
         :key="agent.id"
         class="agent-card"
+        :class="`status-${statusTone(agent)}`"
         :style="{ '--card-color': agent.color }"
         @click="goToAgent(agent.id)"
       >
@@ -122,6 +273,15 @@ function resolveIcon(iconName: string) {
             </div>
           </div>
           <p class="card-desc">{{ agent.description }}</p>
+          <div class="agent-runtime">
+            <span :class="['runtime-dot', statusTone(agent)]"></span>
+            <span>{{ agent.statusLabel || (agent.isActive ? 'Arbeitet' : 'Bereit') }}</span>
+            <span v-if="agent.model" class="runtime-model">{{ agent.model }}</span>
+          </div>
+          <p class="runtime-detail">{{ statusCopy(agent) }}</p>
+          <div class="progress-track">
+            <span :style="{ width: `${agent.progress ?? 0}%`, background: agent.color }"></span>
+          </div>
           <div class="card-tags">
             <span
               v-for="tag in agent.tags"
@@ -139,6 +299,10 @@ function resolveIcon(iconName: string) {
         </div>
       </article>
     </div>
+    <div v-else-if="!loading" class="empty-state">
+      <h3>Keine Agenten sichtbar</h3>
+      <p>Mission Control hat aktuell keine Agenten aus dem Backend erhalten. Prüfe Gateway-Erreichbarkeit und Agent-Konfiguration.</p>
+    </div>
   </div>
 </template>
 
@@ -177,6 +341,58 @@ function resolveIcon(iconName: string) {
   font-size: 11px;
   color: #7e8799;
 }
+.gateway-chip {
+  margin-left: auto;
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  padding: 6px 9px;
+  border: 1px solid var(--line);
+  border-radius: 7px;
+  color: #9ba3b5;
+  font-size: 10px;
+}
+.gateway-chip.ok {
+  color: #51d49a;
+  border-color: rgba(81, 212, 154, .25);
+}
+.gateway-chip.warn {
+  color: #e5b05e;
+  border-color: rgba(229, 176, 94, .28);
+}
+.gateway-chip.error {
+  color: #f29b9b;
+  border-color: rgba(242, 155, 155, .3);
+}
+.load-error {
+  margin-bottom: 14px;
+  color: #e5b05e;
+  font-size: 11px;
+}
+.gateway-warning,
+.empty-state {
+  margin-bottom: 16px;
+  padding: 14px 16px;
+  border-radius: 11px;
+  border: 1px solid rgba(229, 176, 94, .24);
+  background: rgba(229, 176, 94, .08);
+  color: #f1d7aa;
+  font-size: 11px;
+  line-height: 1.5;
+}
+.empty-state {
+  border-color: var(--line);
+  background: rgba(255,255,255,.03);
+  color: #aab2c3;
+}
+.empty-state h3 {
+  margin: 0 0 6px;
+  font-size: 14px;
+  color: #e8eaf0;
+}
+.empty-state p {
+  margin: 0;
+}
 
 /* Agent grid */
 .agents-grid {
@@ -201,6 +417,15 @@ function resolveIcon(iconName: string) {
   box-shadow: 0 0 20px color-mix(in srgb, var(--card-color) 10%, transparent);
   transform: translateY(-2px);
 }
+.agent-card.status-error {
+  border-color: rgba(242, 155, 155, .22);
+}
+.agent-card.status-unsupported {
+  border-color: rgba(229, 176, 94, .22);
+}
+.agent-card.status-stale {
+  border-color: rgba(244, 164, 96, .22);
+}
 
 .card-stripe {
   height: 3px;
@@ -256,6 +481,60 @@ function resolveIcon(iconName: string) {
   margin: 0 0 10px;
   flex: 1;
 }
+.agent-runtime {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  margin-bottom: 8px;
+  color: #8a92a5;
+  font-size: 9.5px;
+  min-width: 0;
+}
+.runtime-dot {
+  width: 7px;
+  height: 7px;
+  border-radius: 999px;
+  background: #6b7385;
+  flex-shrink: 0;
+}
+.runtime-dot.on {
+  background: #51d49a;
+}
+.runtime-dot.connected { background: #51d49a; }
+.runtime-dot.thinking { background: #79aaff; }
+.runtime-dot.blocked { background: #f87171; }
+.runtime-dot.stale { background: #f59e0b; }
+.runtime-dot.error { background: #f29b9b; }
+.runtime-dot.unsupported { background: #e5b05e; }
+.runtime-dot.ready { background: #6b7385; }
+.runtime-model {
+  margin-left: auto;
+  max-width: 46%;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
+  color: #6f788b;
+}
+.runtime-detail {
+  margin: 0 0 10px;
+  min-height: 28px;
+  color: #7e8799;
+  font-size: 10px;
+  line-height: 1.4;
+}
+.progress-track {
+  height: 3px;
+  border-radius: 999px;
+  background: rgba(255,255,255,.06);
+  overflow: hidden;
+  margin-bottom: 10px;
+}
+.progress-track span {
+  display: block;
+  height: 100%;
+  border-radius: inherit;
+}
 
 .card-tags {
   display: flex;

frontend/src/views/TaskBoardView.vue

@@ -264,8 +264,10 @@ function childStatusSummary(taskId: string): string {
 }
 
 function activityHint(task: BoardTask): string {
+  const childSummary = childStatusSummary(task.id)
+  if (childSummary) return childSummary
+
   return task.lastActivityMessage?.trim()
-    || childStatusSummary(task.id)
     || (task.expectedFrom ? `Wartet auf ${expectedFromLabel(task.expectedFrom)}` : 'Noch kein relevanter Progress-Status')
 }
 

phases/phase-3.md

@@ -1,6 +1,6 @@
 # Phase 3
 
-> Letzte Aktualisierung: 2026-06-21
+> Letzte Aktualisierung: 2026-07-09
 
 - [ ] Office View
 - [ ] Kalender
@@ -13,4 +13,31 @@
 
 ## Fokus
 
-Parent-Child-Delegation ist im Board umgesetzt. Offene Phase-3-Schwerpunkte sind jetzt Kalender, Office View und spaetere Reporting-/Visualisierungs-Ausbauten.
+Parent-Child-Delegation ist im Board umgesetzt; Activity-Hints priorisieren sichtbaren Child-Fortschritt vor Parent-Aktivitaet. Das Mission-Control-Programm `df39cd02-b944-41a0-8cfc-400616460ef6` macht Nexus agent-first Mission Control: MCP fuer Agenten, Gateway-Read/Control-Plane und UI fuer Board, Agenten, Crons, Sessions, Live-Thinking und begrenzte owner-only Config-/Approval-Schreibpfade. P0-P5 sind implementiert und lokal verifiziert.
+
+## Mission-Control-Programm
+
+- P0 `9aac2bb0-46dd-47e9-8f48-e39ac66e9918`: Stale-Recovery BackgroundService, `Done`.
+- P1 `c56ecd42-90d5-43f9-b21b-60e02ecd4977`: MCP-Fundament fuer Board/Data Plane. Offizielles C# MCP-SDK, streamable-http `/mcp`, Tools als Fassade ueber `ITaskBridgeService`, Worker-Migration auf MCP. Backend-Implementierung und Tests erledigt; Gateway-`mcp.servers`-Eintraege bleiben Produktionskonfiguration und werden nicht aus dem Repo heraus mutiert.
+- P2 `b1613607-e417-44ce-a7b8-f90b610b2200`: Read-only Mission Control via GatewayConnector, Gateway-Version-Pinning, Agentenkacheln. Status-Semantik kommt aus dem Backend, Gateway-Versionen melden `matched`, `drift`, `missing`, `unpinned`, `unknown`, `error`; Agentenkacheln zeigen `connected`, `thinking`, `blocked`, `ready`, `stale`, `error`, `unsupported`. Verifiziert und erledigt.
+- P3 `53b56788-51cd-4b4e-a1d8-98589c002fac`: Live-Thinking Feed und redigierte Now/Today-Summaries. Nexus-Activity streamt live via SSE-Reconnect; Gateway-Session-History bleibt read-only Fallback ohne direkte Live-Events. Now/Today-Summaries sind deterministisch aus redigierter Activity/History abgeleitet.
+- P4 `b7b104d5-21a5-47d0-b5e9-609822354334`: Bao-only Config-Schreibpfad und Approvals mit Backup, Validate, Reload-Check und Audit. Owner-only Config-Writes und Approval-Aktionen, Validierung vor Replace, `.bak`, Audit ohne Content/Secrets und ehrlicher Reload-Status `not_supported` sind umgesetzt. JSON-Validierung ist im Save-Pfad vorbereitet, bleibt aber durch die aktuelle Editable-Allowlist nicht exposed.
+- P5 `994c0d32-ec5a-408f-be45-870bf073c596`: Konsolidierung, Doku und API-Grenzen. MCP ist bevorzugter Agentenpfad, `/api/bridge` bleibt interne Kompatibilitaetsflaeche, `/api/dashboard` ist UI/Admin. P2-P4-Grenzen sind dokumentiert: Gateway-History ist Fallback-only, Raw-Feed wird nicht dauerhaft persistiert, Config-Hot-Reload ist `not_supported`, JSON-Validation bleibt ohne Allowlist nicht exposed.
+
+Arbeitsreihenfolge abgeschlossen: P1 -> Review -> P2 -> Review -> P3 -> Review -> P4 -> Review -> P5.
+
+## Abschlusslog
+
+- 2026-06-24: TaskBoardView `activityHint` korrigiert, damit Parent-Tasks mit sichtbaren Child-Tasks zuerst den Child-Fortschritt anzeigen. Verifikation: Frontend-`pnpm typecheck` gruen.
+- 2026-07-07: Vier delegated Iris Child-Tasks sequenziell per Nexus API verarbeitet und mit Activity-Hinweis versehen. Verifikation: `GET /api/dashboard/tasks/board` `200`, Counts `offen=1`, `inProgress=0`, `review=11`, `blocked=2`, `done=4`.
+- 2026-07-07: Ready-Agent-Result-IDs nach Vorgabe verarbeitet: zwei bereits gesetzte Review-Tasks unveraendert gelassen, zwei Done-Tasks ueber `In progress` mit Result-Hinweis nach `Review` bewegt. Verifikation: `GET /api/dashboard/tasks/board` `200`, Counts `offen=1`, `inProgress=0`, `review=13`, `blocked=2`, `done=2`.
+- 2026-07-08: Mission-Control-Programm als Backlog-Parent `df39cd02-b944-41a0-8cfc-400616460ef6` angelegt, PO-Child `81ddae64-e833-4d27-b96c-686c4d64296d` fuer Phasenschnitt erstellt und `3d300184-69fc-4215-bb8b-dc06c5c58f57` per Activity als von P1 MCP-Fundament absorbiert markiert. Verifikation: Bridge-API `create_task`, `create_child_task`, `append_activity` erfolgreich.
+- 2026-07-08: Bao-Review-Gate geleert: 13 Review-Tasks mit Bao-Abnahme-Hinweis auf `Done` gesetzt. Verifikation: Bridge-Board `review=0`, `done=15`, `offen=5`, `inProgress=1`, `blocked=2`.
+- 2026-07-08: Mission-Control-Programm in P1-P5 geschnitten. P0 ist erledigt, PO-Child `81ddae64-e833-4d27-b96c-686c4d64296d` auf `Done`, P2-P5 als Child-Tasks angelegt und Alt-Task `3d300184-69fc-4215-bb8b-dc06c5c58f57` als in P1 absorbiert geschlossen. Naechster Schritt: P1-Developer-Lauf.
+- 2026-07-08: P1 MCP-Fundament implementiert: `ModelContextProtocol.AspNetCore` registriert, `/mcp` gemappt, zehn `nexus_*` Tools als Fassade ueber `ITaskBridgeService`, State-Enum ohne `Delegated`, MCP-Tooltests ergaenzt. Verifikation: `dotnet test backend-tests/Nexus.Api.Tests.csproj` im .NET-SDK-Container gruen, 119 Tests.
+- 2026-07-08: P3 Teilfortschritt: Agent-Detailseite zeigt read-only Thinking/Activity-Feed aus Nexus-Activity plus Gateway-Session-History-Fallback. Offen bleiben echter Event-Subscribe mit <2s Sichtbarkeit, Now/Today-Summaries, Retention-Entscheidung und Redaction-Abnahme.
+- 2026-07-08: P2-P5 integrierter Slice: Gateway-Info-Endpunkt mit optionalem Version-Pin, dynamische Agentenkacheln, Activity-SSE-Reload fuer Thinking, Gateway-Activity-Redaction, Bao/Owner-only Config-Writes mit `.bak` und `config_audit`, Doku/API-Grenzen aktualisiert.
+- 2026-07-09: P2 abgenommen: Gateway-Info unterscheidet Pin-Zustaende (`matched`, `drift`, `missing`, `unpinned`, `unknown`, `error`), Agentenstatus wird backendseitig klassifiziert, Frontend zeigt Gateway-Warnungen, Empty/Error-State und Statusdetails ohne lokale Ratesemantik. Verifikation: `COREPACK_HOME=/tmp/corepack pnpm typecheck` gruen; `dotnet test backend-tests/Nexus.Api.Tests.csproj` im .NET-SDK-Container gruen, 125 Tests.
+- 2026-07-09: P3 vervollstaendigt und reviewed: Agent-Detailseite reconnectet auf Dashboard-SSE und filtert live `activity.created` ueber explizite `agentIds`; Now/Today-Summaries tragen `source` plus Timestamp und werden deterministisch aus redigierter Nexus-Activity und Gateway-History gebaut. Rohes Gateway-Feed bleibt unpersistiert, persistierte Activity wird vor Save/Publish redigiert. Review-Fix: `agentIds` werden vor Redaction aus dem Original bestimmt, bereits maskierte Bearer/API-Key-Zeilen bleiben erhalten statt komplett gekuerzt zu werden. Verifikation: `dotnet test backend-tests/Nexus.Api.Tests.csproj` im .NET-SDK-Container gruen, 128 Tests; `COREPACK_HOME=/tmp/corepack pnpm typecheck` gruen.
+- 2026-07-09: P4 vervollstaendigt und reviewed: Config-Saves und Approval-Aktionen sind owner-only; Config-Saves validieren vor Replace, behalten `.bak`, geben strukturierte `validation`, `backup` und `reloadCheck`-Daten zurueck und auditieren ohne Inhalt/Secrets. Pending approvals sind im owner-only Task-Board-Flow sichtbar; Approve/Reject schreibt `task_approval_audit`. Reload-Check ist bewusst `not_supported`, weil Workspace-MD-Hot-Reload nicht verfuegbar ist. Verifikation: `dotnet test backend-tests/Nexus.Api.Tests.csproj` im .NET-SDK-Container gruen, 132 Tests; `COREPACK_HOME=/tmp/corepack pnpm typecheck` gruen.
+- 2026-07-09: P5 Konsolidierung abgeschlossen: README und Phasenlog dokumentieren MCP/Bridge/Dashboard-Grenzen, P3/P4-Retention-/Reload-/Validation-Limits und owner-only Schreibpfade. Doku-Suche bestaetigt: aktive Agenten-Doku empfiehlt MCP/Bridge statt Dashboard-Curl; verbleibende `/api/dashboard`-Treffer sind UI-Code, Controller-Routen oder historische Changelog-/Phasenbelege. Verifikation: `dotnet test backend-tests/Nexus.Api.Tests.csproj` im .NET-SDK-Container gruen, 132 Tests; `COREPACK_HOME=/tmp/corepack pnpm typecheck` gruen.