diff --git a/backend/Conversations/Conversation.cs b/backend/Conversations/Conversation.cs
new file mode 100644
index 0000000..1789354
--- /dev/null
+++ b/backend/Conversations/Conversation.cs
@@ -0,0 +1,19 @@
+namespace backend.Conversations;
+
+public enum EndReason
+{
+    Unknown = 0,
+    Tool = 1,
+    Idle = 2,
+    Error = 3,
+}
+
+public class Conversation
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+    public Guid DeviceId { get; set; }
+    public DateTimeOffset StartedAt { get; set; }
+    public DateTimeOffset? EndedAt { get; set; }
+    public EndReason EndReason { get; set; } = EndReason.Unknown;
+    public List<Turn> Turns { get; set; } = new();
+}
diff --git a/backend/Conversations/Turn.cs b/backend/Conversations/Turn.cs
new file mode 100644
index 0000000..8ed6414
--- /dev/null
+++ b/backend/Conversations/Turn.cs
@@ -0,0 +1,21 @@
+namespace backend.Conversations;
+
+public enum TurnRole
+{
+    User = 0,
+    Assistant = 1,
+    Tool = 2,
+}
+
+public class Turn
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+    public Guid ConversationId { get; set; }
+    public int Index { get; set; }
+    public TurnRole Role { get; set; }
+    public string? Text { get; set; }
+    public string? ToolName { get; set; }
+    public string? ToolArgsJson { get; set; }
+    public string? ToolResultJson { get; set; }
+    public DateTimeOffset CreatedAt { get; set; }
+}
diff --git a/backend/Data/AppDbContext.cs b/backend/Data/AppDbContext.cs
index 0676481..1533c26 100644
--- a/backend/Data/AppDbContext.cs
+++ b/backend/Data/AppDbContext.cs
@@ -1,4 +1,5 @@
 using backend.Auth;
+using backend.Conversations;
 using backend.Devices;
 using backend.Pairing;
 using backend.Settings;
@@ -15,6 +16,8 @@ public class AppDbContext(DbContextOptions<AppDbContext> options)
     public DbSet<DeviceConfig> DeviceConfigs => Set<DeviceConfig>();
     public DbSet<SystemSettings> SystemSettings => Set<SystemSettings>();
     public DbSet<PairingCode> PairingCodes => Set<PairingCode>();
+    public DbSet<Conversation> Conversations => Set<Conversation>();
+    public DbSet<Turn> Turns => Set<Turn>();
 
     protected override void OnModelCreating(ModelBuilder b)
     {
@@ -36,5 +39,13 @@ public class AppDbContext(DbContextOptions<AppDbContext> options)
         b.Entity<SystemSettings>().Property(s => s.Id).ValueGeneratedNever();
         b.Entity<PairingCode>().HasKey(p => p.Code);
         b.Entity<PairingCode>().HasIndex(p => p.ExpiresAt);
+
+        b.Entity<Conversation>().HasIndex(c => c.DeviceId);
+        b.Entity<Conversation>()
+            .HasMany(c => c.Turns)
+            .WithOne()
+            .HasForeignKey(t => t.ConversationId)
+            .OnDelete(DeleteBehavior.Cascade);
+        b.Entity<Turn>().HasIndex(t => new { t.ConversationId, t.Index }).IsUnique();
     }
 }
diff --git a/backend/Migrations/20260611210852_AddConversationsAndTurns.Designer.cs b/backend/Migrations/20260611210852_AddConversationsAndTurns.Designer.cs
new file mode 100644
index 0000000..0104c6d
--- /dev/null
+++ b/backend/Migrations/20260611210852_AddConversationsAndTurns.Designer.cs
@@ -0,0 +1,482 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using backend.Data;
+
+#nullable disable
+
+namespace backend.Migrations
+{
+    [DbContext(typeof(AppDbContext))]
+    [Migration("20260611210852_AddConversationsAndTurns")]
+    partial class AddConversationsAndTurns
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder.HasAnnotation("ProductVersion", "9.0.17");
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRole<System.Guid>", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("NormalizedName")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NormalizedName")
+                        .IsUnique()
+                        .HasDatabaseName("RoleNameIndex");
+
+                    b.ToTable("AspNetRoles", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<System.Guid>", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("ClaimType")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ClaimValue")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("RoleId")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("AspNetRoleClaims", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserClaim<System.Guid>", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("ClaimType")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ClaimValue")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("AspNetUserClaims", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<System.Guid>", b =>
+                {
+                    b.Property<string>("LoginProvider")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ProviderKey")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ProviderDisplayName")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("LoginProvider", "ProviderKey");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("AspNetUserLogins", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserRole<System.Guid>", b =>
+                {
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("RoleId")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("UserId", "RoleId");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("AspNetUserRoles", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserToken<System.Guid>", b =>
+                {
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("LoginProvider")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Value")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("UserId", "LoginProvider", "Name");
+
+                    b.ToTable("AspNetUserTokens", (string)null);
+                });
+
+            modelBuilder.Entity("backend.Auth.ApplicationUser", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("AccessFailedCount")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Email")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("EmailConfirmed")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("LockoutEnabled")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTimeOffset?>("LockoutEnd")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("NormalizedEmail")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("NormalizedUserName")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("PasswordHash")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("PhoneNumberConfirmed")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("SecurityStamp")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("TwoFactorEnabled")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("UserName")
+                        .HasMaxLength(256)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NormalizedEmail")
+                        .HasDatabaseName("EmailIndex");
+
+                    b.HasIndex("NormalizedUserName")
+                        .IsUnique()
+                        .HasDatabaseName("UserNameIndex");
+
+                    b.ToTable("AspNetUsers", (string)null);
+                });
+
+            modelBuilder.Entity("backend.Conversations.Conversation", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("DeviceId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("EndReason")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTimeOffset?>("EndedAt")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTimeOffset>("StartedAt")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("DeviceId");
+
+                    b.ToTable("Conversations");
+                });
+
+            modelBuilder.Entity("backend.Conversations.Turn", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("ConversationId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTimeOffset>("CreatedAt")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("Index")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("Role")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Text")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ToolArgsJson")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ToolName")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ToolResultJson")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ConversationId", "Index")
+                        .IsUnique();
+
+                    b.ToTable("Turns");
+                });
+
+            modelBuilder.Entity("backend.Devices.Device", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("IsRevoked")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTimeOffset?>("LastSeenAt")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("OwnerUserId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTimeOffset>("PairedAt")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("TokenHash")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("OwnerUserId");
+
+                    b.HasIndex("TokenHash")
+                        .IsUnique();
+
+                    b.ToTable("Devices");
+                });
+
+            modelBuilder.Entity("backend.Devices.DeviceConfig", b =>
+                {
+                    b.Property<Guid>("DeviceId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("EnabledToolsJson")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("IdleTimeoutSeconds")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Model")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("SystemPrompt")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Voice")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("DeviceId");
+
+                    b.ToTable("DeviceConfigs");
+                });
+
+            modelBuilder.Entity("backend.Pairing.PairingCode", b =>
+                {
+                    b.Property<string>("Code")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTimeOffset?>("ConsumedAt")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("DeviceName")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTimeOffset>("ExpiresAt")
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("OwnerUserId")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Code");
+
+                    b.HasIndex("ExpiresAt");
+
+                    b.ToTable("PairingCodes");
+                });
+
+            modelBuilder.Entity("backend.Settings.SystemSettings", b =>
+                {
+                    b.Property<int>("Id")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("DefaultIdleTimeoutSeconds")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("DefaultModel")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("DefaultSystemPrompt")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("DefaultVoice")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("SystemSettings");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<System.Guid>", b =>
+                {
+                    b.HasOne("Microsoft.AspNetCore.Identity.IdentityRole<System.Guid>", null)
+                        .WithMany()
+                        .HasForeignKey("RoleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserClaim<System.Guid>", b =>
+                {
+                    b.HasOne("backend.Auth.ApplicationUser", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<System.Guid>", b =>
+                {
+                    b.HasOne("backend.Auth.ApplicationUser", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserRole<System.Guid>", b =>
+                {
+                    b.HasOne("Microsoft.AspNetCore.Identity.IdentityRole<System.Guid>", null)
+                        .WithMany()
+                        .HasForeignKey("RoleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("backend.Auth.ApplicationUser", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserToken<System.Guid>", b =>
+                {
+                    b.HasOne("backend.Auth.ApplicationUser", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("backend.Conversations.Turn", b =>
+                {
+                    b.HasOne("backend.Conversations.Conversation", null)
+                        .WithMany("Turns")
+                        .HasForeignKey("ConversationId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("backend.Devices.Device", b =>
+                {
+                    b.HasOne("backend.Auth.ApplicationUser", null)
+                        .WithMany()
+                        .HasForeignKey("OwnerUserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("backend.Devices.DeviceConfig", b =>
+                {
+                    b.HasOne("backend.Devices.Device", null)
+                        .WithOne("Config")
+                        .HasForeignKey("backend.Devices.DeviceConfig", "DeviceId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("backend.Conversations.Conversation", b =>
+                {
+                    b.Navigation("Turns");
+                });
+
+            modelBuilder.Entity("backend.Devices.Device", b =>
+                {
+                    b.Navigation("Config");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/backend/Migrations/20260611210852_AddConversationsAndTurns.cs b/backend/Migrations/20260611210852_AddConversationsAndTurns.cs
new file mode 100644
index 0000000..de044a2
--- /dev/null
+++ b/backend/Migrations/20260611210852_AddConversationsAndTurns.cs
@@ -0,0 +1,76 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace backend.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddConversationsAndTurns : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Conversations",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "TEXT", nullable: false),
+                    DeviceId = table.Column<Guid>(type: "TEXT", nullable: false),
+                    StartedAt = table.Column<DateTimeOffset>(type: "TEXT", nullable: false),
+                    EndedAt = table.Column<DateTimeOffset>(type: "TEXT", nullable: true),
+                    EndReason = table.Column<int>(type: "INTEGER", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Conversations", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Turns",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "TEXT", nullable: false),
+                    ConversationId = table.Column<Guid>(type: "TEXT", nullable: false),
+                    Index = table.Column<int>(type: "INTEGER", nullable: false),
+                    Role = table.Column<int>(type: "INTEGER", nullable: false),
+                    Text = table.Column<string>(type: "TEXT", nullable: true),
+                    ToolName = table.Column<string>(type: "TEXT", nullable: true),
+                    ToolArgsJson = table.Column<string>(type: "TEXT", nullable: true),
+                    ToolResultJson = table.Column<string>(type: "TEXT", nullable: true),
+                    CreatedAt = table.Column<DateTimeOffset>(type: "TEXT", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Turns", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Turns_Conversations_ConversationId",
+                        column: x => x.ConversationId,
+                        principalTable: "Conversations",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Conversations_DeviceId",
+                table: "Conversations",
+                column: "DeviceId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Turns_ConversationId_Index",
+                table: "Turns",
+                columns: new[] { "ConversationId", "Index" },
+                unique: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "Turns");
+
+            migrationBuilder.DropTable(
+                name: "Conversations");
+        }
+    }
+}
diff --git a/backend/Migrations/AppDbContextModelSnapshot.cs b/backend/Migrations/AppDbContextModelSnapshot.cs
index 9839e75..621100f 100644
--- a/backend/Migrations/AppDbContextModelSnapshot.cs
+++ b/backend/Migrations/AppDbContextModelSnapshot.cs
@@ -208,6 +208,69 @@ namespace backend.Migrations
                     b.ToTable("AspNetUsers", (string)null);
                 });
 
+            modelBuilder.Entity("backend.Conversations.Conversation", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("DeviceId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("EndReason")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTimeOffset?>("EndedAt")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTimeOffset>("StartedAt")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("DeviceId");
+
+                    b.ToTable("Conversations");
+                });
+
+            modelBuilder.Entity("backend.Conversations.Turn", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("TEXT");
+
+                    b.Property<Guid>("ConversationId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTimeOffset>("CreatedAt")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("Index")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("Role")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Text")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ToolArgsJson")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ToolName")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ToolResultJson")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ConversationId", "Index")
+                        .IsUnique();
+
+                    b.ToTable("Turns");
+                });
+
             modelBuilder.Entity("backend.Devices.Device", b =>
                 {
                     b.Property<Guid>("Id")
@@ -374,6 +437,15 @@ namespace backend.Migrations
                         .IsRequired();
                 });
 
+            modelBuilder.Entity("backend.Conversations.Turn", b =>
+                {
+                    b.HasOne("backend.Conversations.Conversation", null)
+                        .WithMany("Turns")
+                        .HasForeignKey("ConversationId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
             modelBuilder.Entity("backend.Devices.Device", b =>
                 {
                     b.HasOne("backend.Auth.ApplicationUser", null)
@@ -392,6 +464,11 @@ namespace backend.Migrations
                         .IsRequired();
                 });
 
+            modelBuilder.Entity("backend.Conversations.Conversation", b =>
+                {
+                    b.Navigation("Turns");
+                });
+
             modelBuilder.Entity("backend.Devices.Device", b =>
                 {
                     b.Navigation("Config");