feat(worker): add external MCP run-history and log tools

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/ClaudeDo.Worker/External/RunHistoryMcpTools.cs

@@ -0,0 +1,51 @@
+using System.ComponentModel;
+using ClaudeDo.Data.Models;
+using ClaudeDo.Data.Repositories;
+using ModelContextProtocol.Server;
+
+namespace ClaudeDo.Worker.External;
+
+public sealed record RunDto(
+    string Id, int RunNumber, string? SessionId, bool IsRetry,
+    string? ResultMarkdown, string? StructuredOutputJson, string? ErrorMarkdown,
+    int? ExitCode, int? TurnCount, int? TokensIn, int? TokensOut,
+    DateTime? StartedAt, DateTime? FinishedAt);
+
+[McpServerToolType]
+public sealed class RunHistoryMcpTools
+{
+    private readonly TaskRunRepository _runs;
+
+    public RunHistoryMcpTools(TaskRunRepository runs) => _runs = runs;
+
+    [McpServerTool, Description("List all execution runs for a task (newest run metadata, tokens, turns, result, error).")]
+    public async Task<IReadOnlyList<RunDto>> ListRuns(string taskId, CancellationToken cancellationToken)
+    {
+        var runs = await _runs.GetByTaskIdAsync(taskId, cancellationToken);
+        return runs.Select(ToDto).ToList();
+    }
+
+    [McpServerTool, Description("Get a single execution run by its run id.")]
+    public async Task<RunDto> GetRun(string runId, CancellationToken cancellationToken)
+    {
+        var run = await _runs.GetByIdAsync(runId, cancellationToken)
+            ?? throw new InvalidOperationException($"Run {runId} not found.");
+        return ToDto(run);
+    }
+
+    [McpServerTool, Description("Fetch the raw log output of a task's latest run. Throws if no log is available.")]
+    public async Task<string> GetTaskLog(string taskId, CancellationToken cancellationToken)
+    {
+        var run = await _runs.GetLatestByTaskIdAsync(taskId, cancellationToken)
+            ?? throw new InvalidOperationException($"No runs found for task {taskId}.");
+        if (string.IsNullOrWhiteSpace(run.LogPath) || !File.Exists(run.LogPath))
+            throw new InvalidOperationException("No log available for the latest run.");
+        return await File.ReadAllTextAsync(run.LogPath, cancellationToken);
+    }
+
+    private static RunDto ToDto(TaskRunEntity r) => new(
+        r.Id, r.RunNumber, r.SessionId, r.IsRetry,
+        r.ResultMarkdown, r.StructuredOutputJson, r.ErrorMarkdown,
+        r.ExitCode, r.TurnCount, r.TokensIn, r.TokensOut,
+        r.StartedAt, r.FinishedAt);
+}