feat(data): per-list base branch, preserved by every config writer

src/ClaudeDo.Data/Configuration/ListConfigEntityConfiguration.cs

@@ -21,5 +21,6 @@ public class ListConfigEntityConfiguration : IEntityTypeConfiguration<ListConfig
         builder.Property(c => c.PermissionMode).HasColumnName("permission_mode");
         builder.Property(c => c.TicketProjectId).HasColumnName("ticket_project_id");
         builder.Property(c => c.PowerUseAllowed).HasColumnName("power_use_allowed");
+        builder.Property(c => c.BaseBranch).HasColumnName("base_branch");
     }
 }

src/ClaudeDo.Data/Migrations/20261001083902_AddListBaseBranch.cs

@@ -0,0 +1,28 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ClaudeDo.Data.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddListBaseBranch : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "base_branch",
+                table: "list_config",
+                type: "TEXT",
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "base_branch",
+                table: "list_config");
+        }
+    }
+}

src/ClaudeDo.Data/Migrations/ClaudeDoDbContextModelSnapshot.cs

@@ -268,6 +268,10 @@ namespace ClaudeDo.Data.Migrations
                         .HasColumnType("TEXT")
                         .HasColumnName("agent_path");
 
+                    b.Property<string>("BaseBranch")
+                        .HasColumnType("TEXT")
+                        .HasColumnName("base_branch");
+
                     b.Property<int?>("MaxTurns")
                         .HasColumnType("INTEGER")
                         .HasColumnName("max_turns");

src/ClaudeDo.Data/Models/ListConfigEntity.cs

@@ -23,6 +23,12 @@ public sealed class ListConfigEntity
     // false, also opt-in. ⚠️ Gleiche Falle wie TicketProjectId: SetConfigAsync kopiert verbatim.
     public bool PowerUseAllowed { get; set; }
 
+    /// <summary>
+    /// Basis neuer Worktrees und Default-Merge-/PR-Ziel (z.B. <c>dev</c>). Null = ausgecheckter Branch
+    /// (privat) bzw. Default-Branch des Remotes (Firma). ⚠️ SetConfigAsync kopiert verbatim.
+    /// </summary>
+    public string? BaseBranch { get; set; }
+
     // Navigation property
     public ListEntity List { get; set; } = null!;
 }

src/ClaudeDo.Data/Repositories/ListRepository.cs

@@ -175,6 +175,7 @@ public sealed class ListRepository
             existing.PermissionMode = config.PermissionMode;
             existing.TicketProjectId = config.TicketProjectId;
             existing.PowerUseAllowed = config.PowerUseAllowed;
+            existing.BaseBranch = config.BaseBranch;
         }
         await _context.SaveChangesAsync(ct);
     }

src/ClaudeDo.Data/Wire.cs

@@ -108,11 +108,12 @@ public record UpdateListDto(string Id, string Name, string? WorkingDir, string D
 // verbatim. Its scale: null = keep stored, <= 0 = clear the link, > 0 = set it.
 // PowerUseAllowed is nullable for the same reason: null = keep stored, false = revoke the opt-in.
 // A non-nullable bool here would let any caller that omits it silently revoke PowerUse for the list.
-public record UpdateListConfigDto(string ListId, string? Model, string? SystemPrompt, string? AgentPath, int? MaxTurns = null, List<string>? SessionSkills = null, string? VerifyCommand = null, string? PermissionMode = null, int? TicketProjectId = null, bool? PowerUseAllowed = null);
+// BaseBranch: null = keep stored, "" = clear, value = set.
+public record UpdateListConfigDto(string ListId, string? Model, string? SystemPrompt, string? AgentPath, int? MaxTurns = null, List<string>? SessionSkills = null, string? VerifyCommand = null, string? PermissionMode = null, int? TicketProjectId = null, bool? PowerUseAllowed = null, string? BaseBranch = null);
 
 public record UpdateTaskAgentSettingsDto(string TaskId, string? Model, string? SystemPrompt, string? AgentPath, int? MaxTurns = null, List<string>? SessionSkills = null, string? PermissionMode = null);
 
-public record ListConfigDto(string? Model, string? SystemPrompt, string? AgentPath, int? MaxTurns = null, List<string>? SessionSkills = null, string? VerifyCommand = null, string? PermissionMode = null, int? TicketProjectId = null, bool PowerUseAllowed = false);
+public record ListConfigDto(string? Model, string? SystemPrompt, string? AgentPath, int? MaxTurns = null, List<string>? SessionSkills = null, string? VerifyCommand = null, string? PermissionMode = null, int? TicketProjectId = null, bool PowerUseAllowed = false, string? BaseBranch = null);
 
 public record SeedResultDto(int Copied, int Skipped);
 

src/ClaudeDo.Worker/External/ConfigMcpTools.cs

@@ -10,7 +10,7 @@ using ModelContextProtocol.Server;
 namespace ClaudeDo.Worker.External;
 
 public sealed record TaskConfigDto(string? Model, string? SystemPrompt, string? AgentPath, int? MaxTurns);
-public sealed record ListConfigDto(string? Model, string? SystemPrompt, string? AgentPath, int? MaxTurns, string? VerifyCommand);
+public sealed record ListConfigDto(string? Model, string? SystemPrompt, string? AgentPath, int? MaxTurns, string? VerifyCommand, string? BaseBranch = null);
 public sealed record TaskConfigResult(bool Found, TaskConfigDto? Config);
 public sealed record ListConfigResult(bool Found, ListConfigDto? Config);
 public sealed record SetListConfigResult(bool Ok, string ListId, ListConfigDto? Config);
@@ -55,7 +55,7 @@ public sealed class ConfigMcpTools
         var cfg = await _lists.GetConfigAsync(listId, cancellationToken);
         return cfg is null
             ? new ListConfigResult(false, null)
-            : new ListConfigResult(true, new ListConfigDto(cfg.Model, cfg.SystemPrompt, cfg.AgentPath, cfg.MaxTurns, cfg.VerifyCommand));
+            : new ListConfigResult(true, new ListConfigDto(cfg.Model, cfg.SystemPrompt, cfg.AgentPath, cfg.MaxTurns, cfg.VerifyCommand, cfg.BaseBranch));
     }
 
     // clearFields (not a per-field sentinel like UpdateList's "" for workingDir) because maxTurns is an
@@ -81,7 +81,7 @@ public sealed class ConfigMcpTools
         "in this list that don't override them (verify command is list-only; tasks cannot override it). Only " +
         "the fields you pass are changed; omitted fields keep their current value. To clear a field instead, " +
         "name it in clearFields; clearing all five deletes the list's config unless it also carries settings " +
-        "this tool doesn't expose (session skills, file-scope serialization, permission mode), which are " +
+        "this tool doesn't expose (session skills, permission mode, ticket link, base branch, PowerUse opt-in), which are " +
         "always preserved.")]
     public async Task<SetListConfigResult> SetListConfig(
         string listId, string? model = null, string? systemPrompt = null, string? agentPath = null,
@@ -110,7 +110,8 @@ public sealed class ConfigMcpTools
         // UI-only).
         var hasUnrelatedSettings = existing is not null
             && (existing.SessionSkills is not null
-                || existing.PermissionMode is not null || existing.TicketProjectId is not null);
+                || existing.PermissionMode is not null || existing.TicketProjectId is not null
+                || existing.BaseBranch is not null || existing.PowerUseAllowed);
 
         ListConfigDto? config;
         var allCleared = m is null && sp is null && ap is null && mt is null && vc is null;
@@ -131,8 +132,10 @@ public sealed class ConfigMcpTools
                 VerifyCommand = vc, SessionSkills = existing?.SessionSkills,
                 PermissionMode = existing?.PermissionMode,
                 TicketProjectId = existing?.TicketProjectId,
+                BaseBranch = existing?.BaseBranch,
+                PowerUseAllowed = existing?.PowerUseAllowed ?? false,
             }, cancellationToken);
-            config = allCleared ? null : new ListConfigDto(m, sp, ap, mt, vc);
+            config = allCleared ? null : new ListConfigDto(m, sp, ap, mt, vc, existing?.BaseBranch);
         }
 
         await _broadcaster.ListUpdated(listId);

src/ClaudeDo.Worker/Hub/WorkerHub.cs

@@ -600,9 +600,12 @@ public sealed class WorkerHub : Microsoft.AspNetCore.SignalR.Hub
         // Gleiches Tri-State-Muster: null = gespeicherten Wert behalten, false = Opt-in widerrufen.
         var powerUseAllowed = dto.PowerUseAllowed ?? existing?.PowerUseAllowed ?? false;
 
+        // Tri-State wie oben: null = behalten, "" = löschen.
+        var baseBranch = dto.BaseBranch is null ? existing?.BaseBranch : dto.BaseBranch.NullIfBlank();
+
         // powerUseAllowed muss mit in die Leer-Prüfung: sonst löscht ein Save, bei dem PowerUse das
         // EINZIGE gesetzte Feld ist, die Config-Zeile und damit das Opt-in gleich wieder mit.
-        if (model is null && systemPrompt is null && agentPath is null && dto.MaxTurns is null && sessionSkills is null && verifyCommand is null && permissionMode is null && ticketProjectId is null && !powerUseAllowed)
+        if (model is null && systemPrompt is null && agentPath is null && dto.MaxTurns is null && sessionSkills is null && verifyCommand is null && permissionMode is null && ticketProjectId is null && !powerUseAllowed && baseBranch is null)
         {
             await repo.DeleteConfigAsync(dto.ListId);
         }
@@ -620,6 +623,7 @@ public sealed class WorkerHub : Microsoft.AspNetCore.SignalR.Hub
                 PermissionMode = permissionMode,
                 TicketProjectId = ticketProjectId,
                 PowerUseAllowed = powerUseAllowed,
+                BaseBranch = baseBranch,
             });
         }
 
@@ -643,7 +647,7 @@ public sealed class WorkerHub : Microsoft.AspNetCore.SignalR.Hub
         var repo = new ListRepository(ctx);
         var config = await repo.GetConfigAsync(listId);
         if (config is null) return null;
-        return new ListConfigDto(config.Model, config.SystemPrompt, config.AgentPath, config.MaxTurns, SkillsFromJson(config.SessionSkills), config.VerifyCommand, config.PermissionMode, config.TicketProjectId, config.PowerUseAllowed);
+        return new ListConfigDto(config.Model, config.SystemPrompt, config.AgentPath, config.MaxTurns, SkillsFromJson(config.SessionSkills), config.VerifyCommand, config.PermissionMode, config.TicketProjectId, config.PowerUseAllowed, config.BaseBranch);
     }
 
     public async Task<SetTaskStatusResultDto> SetTaskStatus(string taskId, string status)