diff --git a/docs/components/SiteRuntime.md b/docs/components/SiteRuntime.md
index e5675159..a114056c 100644
--- a/docs/components/SiteRuntime.md
+++ b/docs/components/SiteRuntime.md
@@ -12,7 +12,7 @@ The component code lives in `src/ZB.MOM.WW.ScadaBridge.SiteRuntime/`:
 - `Scripts/` — `ScriptCompilationService`, `ScriptExecutionScheduler`, `SharedScriptLibrary`, `ScriptRuntimeContext`, `ScopeAccessors`, `TriggerExpressionGlobals`.
 - `Streaming/` — `SiteStreamManager` (the site-wide Akka broadcast stream).
 - `Persistence/` — `SiteStorageService` (raw SQLite via `Microsoft.Data.Sqlite`), `SiteStorageInitializer`.
-- `Repositories/` — `SiteExternalSystemRepository`, `SiteNotificationRepository`.
+- `Repositories/` — `SiteExternalSystemRepository`. (The `SiteNotificationRepository` variant was removed 2026-07-10, arch-review 08 §1.3/#23, because notification config is central-only and never lives on a site.)
 - `Tracking/` — `OperationTrackingStore`, `OperationTrackingOptions`.
 
 `ServiceCollectionExtensions.AddSiteRuntime(connectionString)` registers all singletons; the `Host` calls it and wires the `DeploymentManagerActor` cluster singleton separately via `AkkaHostedService`.
diff --git a/src/ZB.MOM.WW.ScadaBridge.SiteRuntime/Persistence/SiteStorageService.cs b/src/ZB.MOM.WW.ScadaBridge.SiteRuntime/Persistence/SiteStorageService.cs
index 60800328..52a4680e 100644
--- a/src/ZB.MOM.WW.ScadaBridge.SiteRuntime/Persistence/SiteStorageService.cs
+++ b/src/ZB.MOM.WW.ScadaBridge.SiteRuntime/Persistence/SiteStorageService.cs
@@ -799,6 +799,12 @@ public class SiteStorageService
     /// idempotent and is invoked on every artifact apply / deploy so existing exposure
     /// is cleared, not just future writes. The tables themselves are retained (the
     /// schema is harmless once empty); only their contents are removed.
+    ///
+    /// The site-side write paths (<c>StoreNotificationListAsync</c>/<c>StoreSmtpConfigurationAsync</c>)
+    /// and the <c>SiteNotificationRepository</c> were removed 2026-07-10 (arch-review 08 §1.3/#23)
+    /// because notification config is central-only and must never be written to a site — this
+    /// purge is the sole remaining touchpoint, kept only to scrub DBs written by older builds;
+    /// do not reintroduce site-side notification writes.
     /// </summary>
     /// <returns>A task that completes when both tables have been emptied.</returns>
     public async Task PurgeCentralOnlyNotificationConfigAsync()
@@ -813,80 +819,6 @@ public class SiteStorageService
         await command.ExecuteNonQueryAsync();
     }
 
-    /// <summary>
-    /// Stores or updates a notification list.
-    /// </summary>
-    /// <param name="name">The name of the notification list.</param>
-    /// <param name="recipientEmails">List of recipient email addresses.</param>
-    /// <returns>A task that completes when the notification list has been stored or updated.</returns>
-    public async Task StoreNotificationListAsync(string name, IReadOnlyList<string> recipientEmails)
-    {
-        await using var connection = new SqliteConnection(_connectionString);
-        await connection.OpenAsync();
-
-        await using var command = connection.CreateCommand();
-        command.CommandText = @"
-            INSERT INTO notification_lists (name, recipient_emails, updated_at)
-            VALUES (@name, @emails, @updatedAt)
-            ON CONFLICT(name) DO UPDATE SET
-                recipient_emails = excluded.recipient_emails,
-                updated_at = excluded.updated_at";
-
-        command.Parameters.AddWithValue("@name", name);
-        command.Parameters.AddWithValue("@emails", System.Text.Json.JsonSerializer.Serialize(recipientEmails));
-        command.Parameters.AddWithValue("@updatedAt", DateTimeOffset.UtcNow.ToString("O"));
-
-        await command.ExecuteNonQueryAsync();
-    }
-
-    // ── SMTP Configuration CRUD ──
-
-    /// <summary>
-    /// Stores or updates an SMTP configuration.
-    /// </summary>
-    /// <param name="name">The name of the SMTP configuration.</param>
-    /// <param name="server">SMTP server hostname.</param>
-    /// <param name="port">SMTP server port.</param>
-    /// <param name="authMode">Authentication mode ('None', 'BasicAuth', 'OAuth2').</param>
-    /// <param name="fromAddress">Email address used as the sender.</param>
-    /// <param name="username">Username for authentication, if applicable.</param>
-    /// <param name="password">Password for authentication, if applicable.</param>
-    /// <param name="oauthConfig">OAuth2 configuration JSON, if applicable.</param>
-    /// <returns>A task that completes when the SMTP configuration has been stored or updated.</returns>
-    public async Task StoreSmtpConfigurationAsync(
-        string name, string server, int port, string authMode, string fromAddress,
-        string? username, string? password, string? oauthConfig)
-    {
-        await using var connection = new SqliteConnection(_connectionString);
-        await connection.OpenAsync();
-
-        await using var command = connection.CreateCommand();
-        command.CommandText = @"
-            INSERT INTO smtp_configurations (name, server, port, auth_mode, from_address, username, password, oauth_config, updated_at)
-            VALUES (@name, @server, @port, @authMode, @fromAddress, @username, @password, @oauthConfig, @updatedAt)
-            ON CONFLICT(name) DO UPDATE SET
-                server = excluded.server,
-                port = excluded.port,
-                auth_mode = excluded.auth_mode,
-                from_address = excluded.from_address,
-                username = excluded.username,
-                password = excluded.password,
-                oauth_config = excluded.oauth_config,
-                updated_at = excluded.updated_at";
-
-        command.Parameters.AddWithValue("@name", name);
-        command.Parameters.AddWithValue("@server", server);
-        command.Parameters.AddWithValue("@port", port);
-        command.Parameters.AddWithValue("@authMode", authMode);
-        command.Parameters.AddWithValue("@fromAddress", fromAddress);
-        command.Parameters.AddWithValue("@username", (object?)username ?? DBNull.Value);
-        command.Parameters.AddWithValue("@password", (object?)password ?? DBNull.Value);
-        command.Parameters.AddWithValue("@oauthConfig", (object?)oauthConfig ?? DBNull.Value);
-        command.Parameters.AddWithValue("@updatedAt", DateTimeOffset.UtcNow.ToString("O"));
-
-        await command.ExecuteNonQueryAsync();
-    }
-
     // ── Data Connection Definition CRUD ──
 
     /// <summary>
diff --git a/src/ZB.MOM.WW.ScadaBridge.SiteRuntime/Repositories/SiteNotificationRepository.cs b/src/ZB.MOM.WW.ScadaBridge.SiteRuntime/Repositories/SiteNotificationRepository.cs
deleted file mode 100644
index c69171bc..00000000
--- a/src/ZB.MOM.WW.ScadaBridge.SiteRuntime/Repositories/SiteNotificationRepository.cs
+++ /dev/null
@@ -1,300 +0,0 @@
-using System.Text.Json;
-using Microsoft.Data.Sqlite;
-using ZB.MOM.WW.ScadaBridge.Commons.Entities.Notifications;
-using ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Repositories;
-using ZB.MOM.WW.ScadaBridge.SiteRuntime.Persistence;
-
-namespace ZB.MOM.WW.ScadaBridge.SiteRuntime.Repositories;
-
-/// <summary>
-/// Site-side read-only implementation of <see cref="INotificationRepository"/>
-/// backed by the local SQLite database via <see cref="SiteStorageService"/>.
-/// Write operations throw <see cref="NotSupportedException"/> because site-local
-/// artifacts are managed exclusively through deployment from Central.
-/// </summary>
-public class SiteNotificationRepository : INotificationRepository
-{
-    private readonly SiteStorageService _storage;
-
-    /// <summary>
-    /// Initializes a new instance of the <see cref="SiteNotificationRepository"/> class.
-    /// </summary>
-    /// <param name="storage">The site storage service for database access.</param>
-    public SiteNotificationRepository(SiteStorageService storage)
-    {
-        _storage = storage ?? throw new ArgumentNullException(nameof(storage));
-    }
-
-    // ── NotificationList (read) ──
-
-    /// <inheritdoc />
-    public async Task<NotificationList?> GetListByNameAsync(
-        string name, CancellationToken cancellationToken = default)
-    {
-        await using var connection = CreateConnection();
-        await connection.OpenAsync(cancellationToken);
-
-        await using var command = connection.CreateCommand();
-        command.CommandText = @"
-            SELECT name, recipient_emails
-            FROM notification_lists
-            WHERE name = @name";
-        command.Parameters.AddWithValue("@name", name);
-
-        await using var reader = await command.ExecuteReaderAsync(cancellationToken);
-        if (!await reader.ReadAsync(cancellationToken))
-            return null;
-
-        return MapNotificationList(reader);
-    }
-
-    /// <inheritdoc />
-    public async Task<IReadOnlyList<NotificationList>> GetAllNotificationListsAsync(
-        CancellationToken cancellationToken = default)
-    {
-        await using var connection = CreateConnection();
-        await connection.OpenAsync(cancellationToken);
-
-        await using var command = connection.CreateCommand();
-        command.CommandText = "SELECT name, recipient_emails FROM notification_lists";
-
-        var results = new List<NotificationList>();
-        await using var reader = await command.ExecuteReaderAsync(cancellationToken);
-        while (await reader.ReadAsync(cancellationToken))
-        {
-            results.Add(MapNotificationList(reader));
-        }
-
-        return results;
-    }
-
-    /// <inheritdoc />
-    public async Task<NotificationList?> GetNotificationListByIdAsync(
-        int id, CancellationToken cancellationToken = default)
-    {
-        // The SQLite table is keyed by name, not by integer ID.
-        // Scan all rows and match on the synthetic ID derived from the name.
-        var all = await GetAllNotificationListsAsync(cancellationToken);
-        return all.FirstOrDefault(l => l.Id == id);
-    }
-
-    // ── NotificationRecipient (read) ──
-
-    /// <inheritdoc />
-    public async Task<IReadOnlyList<NotificationRecipient>> GetRecipientsByListIdAsync(
-        int notificationListId, CancellationToken cancellationToken = default)
-    {
-        // Find the parent list to get its name, then parse the recipient_emails JSON.
-        var list = await GetNotificationListByIdAsync(notificationListId, cancellationToken);
-        if (list is null)
-            return Array.Empty<NotificationRecipient>();
-
-        await using var connection = CreateConnection();
-        await connection.OpenAsync(cancellationToken);
-
-        await using var command = connection.CreateCommand();
-        command.CommandText = @"
-            SELECT recipient_emails
-            FROM notification_lists
-            WHERE name = @name";
-        command.Parameters.AddWithValue("@name", list.Name);
-
-        var json = (string?)await command.ExecuteScalarAsync(cancellationToken);
-        if (string.IsNullOrWhiteSpace(json))
-            return Array.Empty<NotificationRecipient>();
-
-        return ParseRecipientEmails(json, notificationListId);
-    }
-
-    /// <inheritdoc />
-    public async Task<NotificationRecipient?> GetRecipientByIdAsync(
-        int id, CancellationToken cancellationToken = default)
-    {
-        // Scan all lists and their recipients to find the matching synthetic ID.
-        var lists = await GetAllNotificationListsAsync(cancellationToken);
-        foreach (var list in lists)
-        {
-            var recipients = await GetRecipientsByListIdAsync(list.Id, cancellationToken);
-            var match = recipients.FirstOrDefault(r => r.Id == id);
-            if (match is not null)
-                return match;
-        }
-
-        return null;
-    }
-
-    // ── SmtpConfiguration (read) ──
-
-    /// <inheritdoc />
-    public async Task<IReadOnlyList<SmtpConfiguration>> GetAllSmtpConfigurationsAsync(
-        CancellationToken cancellationToken = default)
-    {
-        await using var connection = CreateConnection();
-        await connection.OpenAsync(cancellationToken);
-
-        await using var command = connection.CreateCommand();
-        command.CommandText = @"
-            SELECT name, server, port, auth_mode, from_address, username, password, oauth_config
-            FROM smtp_configurations";
-
-        var results = new List<SmtpConfiguration>();
-        await using var reader = await command.ExecuteReaderAsync(cancellationToken);
-        while (await reader.ReadAsync(cancellationToken))
-        {
-            results.Add(MapSmtpConfiguration(reader));
-        }
-
-        return results;
-    }
-
-    /// <inheritdoc />
-    public async Task<SmtpConfiguration?> GetSmtpConfigurationByIdAsync(
-        int id, CancellationToken cancellationToken = default)
-    {
-        var all = await GetAllSmtpConfigurationsAsync(cancellationToken);
-        return all.FirstOrDefault(s => s.Id == id);
-    }
-
-    // ── Write operations (not supported on site) ──
-
-    /// <inheritdoc />
-    public Task AddNotificationListAsync(NotificationList list, CancellationToken cancellationToken = default)
-        => throw new NotSupportedException("Managed via artifact deployment from Central");
-
-    /// <inheritdoc />
-    public Task UpdateNotificationListAsync(NotificationList list, CancellationToken cancellationToken = default)
-        => throw new NotSupportedException("Managed via artifact deployment from Central");
-
-    /// <inheritdoc />
-    public Task DeleteNotificationListAsync(int id, CancellationToken cancellationToken = default)
-        => throw new NotSupportedException("Managed via artifact deployment from Central");
-
-    /// <inheritdoc />
-    public Task AddRecipientAsync(NotificationRecipient recipient, CancellationToken cancellationToken = default)
-        => throw new NotSupportedException("Managed via artifact deployment from Central");
-
-    /// <inheritdoc />
-    public Task UpdateRecipientAsync(NotificationRecipient recipient, CancellationToken cancellationToken = default)
-        => throw new NotSupportedException("Managed via artifact deployment from Central");
-
-    /// <inheritdoc />
-    public Task DeleteRecipientAsync(int id, CancellationToken cancellationToken = default)
-        => throw new NotSupportedException("Managed via artifact deployment from Central");
-
-    /// <inheritdoc />
-    public Task AddSmtpConfigurationAsync(SmtpConfiguration configuration, CancellationToken cancellationToken = default)
-        => throw new NotSupportedException("Managed via artifact deployment from Central");
-
-    /// <inheritdoc />
-    public Task UpdateSmtpConfigurationAsync(SmtpConfiguration configuration, CancellationToken cancellationToken = default)
-        => throw new NotSupportedException("Managed via artifact deployment from Central");
-
-    /// <inheritdoc />
-    public Task DeleteSmtpConfigurationAsync(int id, CancellationToken cancellationToken = default)
-        => throw new NotSupportedException("Managed via artifact deployment from Central");
-
-    // ── SmsConfiguration (central-only — never deployed to or served from the site) ──
-
-    /// <inheritdoc />
-    public Task<SmsConfiguration?> GetSmsConfigurationAsync(CancellationToken cancellationToken = default)
-        => throw new NotSupportedException("Managed via artifact deployment from Central");
-
-    /// <inheritdoc />
-    public Task<SmsConfiguration?> GetSmsConfigurationByIdAsync(int id, CancellationToken cancellationToken = default)
-        => throw new NotSupportedException("Managed via artifact deployment from Central");
-
-    /// <inheritdoc />
-    public Task<IReadOnlyList<SmsConfiguration>> GetAllSmsConfigurationsAsync(CancellationToken cancellationToken = default)
-        => throw new NotSupportedException("Managed via artifact deployment from Central");
-
-    /// <inheritdoc />
-    public Task AddSmsConfigurationAsync(SmsConfiguration smsConfiguration, CancellationToken cancellationToken = default)
-        => throw new NotSupportedException("Managed via artifact deployment from Central");
-
-    /// <inheritdoc />
-    public Task UpdateSmsConfigurationAsync(SmsConfiguration smsConfiguration, CancellationToken cancellationToken = default)
-        => throw new NotSupportedException("Managed via artifact deployment from Central");
-
-    /// <inheritdoc />
-    public Task DeleteSmsConfigurationAsync(int id, CancellationToken cancellationToken = default)
-        => throw new NotSupportedException("Managed via artifact deployment from Central");
-
-    /// <inheritdoc />
-    public Task<int> SaveChangesAsync(CancellationToken cancellationToken = default)
-        => throw new NotSupportedException("Managed via artifact deployment from Central");
-
-    // ── Private helpers ──
-
-    /// <summary>
-    /// Creates a new SQLite connection against the site database via
-    /// <see cref="SiteStorageService.CreateConnection"/> instead of
-    /// reaching into its private connection-string field via reflection.
-    /// </summary>
-    private SqliteConnection CreateConnection() => _storage.CreateConnection();
-
-    private static NotificationList MapNotificationList(SqliteDataReader reader)
-    {
-        var name = reader.GetString(0);
-        var list = new NotificationList(name)
-        {
-            Id = GenerateSyntheticId(name)
-        };
-
-        // Eagerly populate Recipients from the JSON column.
-        var emailsJson = reader.GetString(1);
-        var recipients = ParseRecipientEmails(emailsJson, list.Id);
-        foreach (var r in recipients)
-        {
-            list.Recipients.Add(r);
-        }
-
-        return list;
-    }
-
-    private static IReadOnlyList<NotificationRecipient> ParseRecipientEmails(
-        string json, int notificationListId)
-    {
-        try
-        {
-            var emails = JsonSerializer.Deserialize<List<string>>(json,
-                new JsonSerializerOptions { PropertyNameCaseInsensitive = true });
-
-            if (emails is null)
-                return Array.Empty<NotificationRecipient>();
-
-            return emails.Select(email => new NotificationRecipient(
-                name: email,
-                emailAddress: email)
-            {
-                Id = GenerateSyntheticId($"{notificationListId}:{email}"),
-                NotificationListId = notificationListId
-            }).ToList();
-        }
-        catch (JsonException)
-        {
-            return Array.Empty<NotificationRecipient>();
-        }
-    }
-
-    private static SmtpConfiguration MapSmtpConfiguration(SqliteDataReader reader)
-    {
-        var name = reader.GetString(0);
-        return new SmtpConfiguration(
-            host: reader.GetString(1),
-            authType: reader.GetString(3),
-            fromAddress: reader.GetString(4))
-        {
-            Id = GenerateSyntheticId(name),
-            Port = reader.GetInt32(2),
-            Credentials = reader.IsDBNull(5) ? null : reader.GetString(5),
-            TlsMode = reader.IsDBNull(7) ? null : reader.GetString(7)
-        };
-    }
-
-    /// <summary>
-    /// Generates a stable positive integer ID from a string name.
-    /// Uses a deterministic FNV-1a hash rather than <see cref="string.GetHashCode()"/>,
-    /// which is randomized per process on .NET Core and would change every restart.
-    /// </summary>
-    private static int GenerateSyntheticId(string name) => SyntheticId.From(name);
-}
diff --git a/src/ZB.MOM.WW.ScadaBridge.SiteRuntime/ServiceCollectionExtensions.cs b/src/ZB.MOM.WW.ScadaBridge.SiteRuntime/ServiceCollectionExtensions.cs
index b5db5550..20b612da 100644
--- a/src/ZB.MOM.WW.ScadaBridge.SiteRuntime/ServiceCollectionExtensions.cs
+++ b/src/ZB.MOM.WW.ScadaBridge.SiteRuntime/ServiceCollectionExtensions.cs
@@ -62,7 +62,6 @@ public static class ServiceCollectionExtensions
 
         // Site-local repository implementations backed by SQLite
         services.AddScoped<IExternalSystemRepository, SiteExternalSystemRepository>();
-        services.AddScoped<INotificationRepository, SiteNotificationRepository>();
 
         // Notify-and-fetch: typed HttpClient for fetching deployment configs from central.
         services.AddHttpClient<IDeploymentConfigFetcher, HttpDeploymentConfigFetcher>()
diff --git a/tests/ZB.MOM.WW.ScadaBridge.Host.Tests/CompositionRootTests.cs b/tests/ZB.MOM.WW.ScadaBridge.Host.Tests/CompositionRootTests.cs
index ba94e831..f054b651 100644
--- a/tests/ZB.MOM.WW.ScadaBridge.Host.Tests/CompositionRootTests.cs
+++ b/tests/ZB.MOM.WW.ScadaBridge.Host.Tests/CompositionRootTests.cs
@@ -424,7 +424,8 @@ public class SiteCompositionRootTests : IDisposable
     public static IEnumerable<object[]> SiteScopedServices => new[]
     {
         new object[] { typeof(IExternalSystemRepository) },
-        new object[] { typeof(INotificationRepository) },
+        // INotificationRepository is intentionally absent — notification config is
+        // central-only (arch-review 08 §1.3/#23); the site-side variant was removed.
         new object[] { typeof(ExternalSystemClient) },
         new object[] { typeof(IExternalSystemClient) },
         new object[] { typeof(DatabaseGateway) },
@@ -442,11 +443,15 @@ public class SiteCompositionRootTests : IDisposable
     }
 
     [Fact]
-    public void Site_NotificationRepository_IsSiteImplementation()
+    public void Site_NotificationRepository_IsNotRegistered()
     {
+        // Notification delivery is central-only (CLAUDE.md "Notification delivery is
+        // central-only"); the site-local notification_lists/smtp_configurations tables
+        // are purged on every artifact apply, so a site-side INotificationRepository
+        // could only ever serve empty results. It must not be registered at all.
         using var scope = _host.Services.CreateScope();
-        var repo = scope.ServiceProvider.GetRequiredService<INotificationRepository>();
-        Assert.IsType<SiteNotificationRepository>(repo);
+        var repo = scope.ServiceProvider.GetService<INotificationRepository>();
+        Assert.Null(repo);
     }
 
     // --- Options ---
diff --git a/tests/ZB.MOM.WW.ScadaBridge.SiteRuntime.Tests/Persistence/ArtifactStorageTests.cs b/tests/ZB.MOM.WW.ScadaBridge.SiteRuntime.Tests/Persistence/ArtifactStorageTests.cs
index e753bc1c..7d3e8423 100644
--- a/tests/ZB.MOM.WW.ScadaBridge.SiteRuntime.Tests/Persistence/ArtifactStorageTests.cs
+++ b/tests/ZB.MOM.WW.ScadaBridge.SiteRuntime.Tests/Persistence/ArtifactStorageTests.cs
@@ -1,6 +1,5 @@
 using Microsoft.Extensions.Logging.Abstractions;
 using ZB.MOM.WW.ScadaBridge.SiteRuntime.Persistence;
-using ZB.MOM.WW.ScadaBridge.SiteRuntime.Repositories;
 
 namespace ZB.MOM.WW.ScadaBridge.SiteRuntime.Tests.Persistence;
 
@@ -123,46 +122,67 @@ public class ArtifactStorageTests : IAsyncLifetime, IDisposable
         // Upsert should not throw
     }
 
-    // ── Notification List Storage ──
-
-    [Fact]
-    public async Task StoreNotificationList_DoesNotThrow()
-    {
-        await _storage.StoreNotificationListAsync(
-            "Ops Team", ["ops@example.com", "admin@example.com"]);
-    }
-
-    [Fact]
-    public async Task StoreNotificationList_Upserts()
-    {
-        await _storage.StoreNotificationListAsync("Team1", ["a@b.com"]);
-        await _storage.StoreNotificationListAsync("Team1", ["x@y.com", "z@w.com"]);
-
-        // Upsert should not throw
-    }
-
     // ── DeploymentManager-025 / SiteRuntime-031: central-only notif/SMTP purge ──
+    //
+    // Notification config is central-only. The site-side write paths and
+    // SiteNotificationRepository were removed 2026-07-10 (arch-review 08 §1.3/#23);
+    // PurgeCentralOnlyNotificationConfigAsync is retained as the security cleanup for
+    // DBs written by older builds. These tests seed the (still-present) tables via raw
+    // SQL — the only way rows can now exist — and assert the purge empties them.
+
+    private async Task SeedNotificationRowAsync(string name, string emailsJson)
+    {
+        await using var connection = new Microsoft.Data.Sqlite.SqliteConnection($"Data Source={_dbFile}");
+        await connection.OpenAsync();
+        await using var command = connection.CreateCommand();
+        command.CommandText =
+            "INSERT INTO notification_lists (name, recipient_emails, updated_at) VALUES (@n, @e, @u)";
+        command.Parameters.AddWithValue("@n", name);
+        command.Parameters.AddWithValue("@e", emailsJson);
+        command.Parameters.AddWithValue("@u", DateTimeOffset.UtcNow.ToString("O"));
+        await command.ExecuteNonQueryAsync();
+    }
+
+    private async Task SeedSmtpRowAsync(string name, string password)
+    {
+        await using var connection = new Microsoft.Data.Sqlite.SqliteConnection($"Data Source={_dbFile}");
+        await connection.OpenAsync();
+        await using var command = connection.CreateCommand();
+        command.CommandText =
+            @"INSERT INTO smtp_configurations (name, server, port, auth_mode, from_address, username, password, oauth_config, updated_at)
+              VALUES (@n, 'smtp.example.com', 587, 'BasicAuth', 'noreply@example.com', 'smtpuser', @p, NULL, @u)";
+        command.Parameters.AddWithValue("@n", name);
+        command.Parameters.AddWithValue("@p", password);
+        command.Parameters.AddWithValue("@u", DateTimeOffset.UtcNow.ToString("O"));
+        await command.ExecuteNonQueryAsync();
+    }
+
+    private async Task<long> RowCountAsync(string table)
+    {
+        await using var connection = new Microsoft.Data.Sqlite.SqliteConnection($"Data Source={_dbFile}");
+        await connection.OpenAsync();
+        await using var command = connection.CreateCommand();
+        command.CommandText = $"SELECT COUNT(*) FROM {table}";
+        return (long)(await command.ExecuteScalarAsync())!;
+    }
 
     [Fact]
     public async Task PurgeCentralOnlyNotificationConfig_RemovesPersistedNotificationListsAndSmtpRows()
     {
         // Simulate a pre-fix build that already shipped a notification list and an
         // SMTP config (with a plaintext password) to the site.
-        await _storage.StoreNotificationListAsync("Ops Team", ["ops@example.com"]);
-        await _storage.StoreSmtpConfigurationAsync(
-            "smtp.example.com:587", "smtp.example.com", 587, "BasicAuth",
-            "noreply@example.com", "smtpuser", "PLAINTEXT-SECRET", null);
+        await SeedNotificationRowAsync("Ops Team", "[\"ops@example.com\"]");
+        await SeedSmtpRowAsync("smtp.example.com:587", "PLAINTEXT-SECRET");
 
-        var repo = new SiteNotificationRepository(_storage);
-        Assert.NotEmpty(await repo.GetAllNotificationListsAsync());
-        Assert.NotEmpty(await repo.GetAllSmtpConfigurationsAsync());
+        Assert.Equal(1, await RowCountAsync("notification_lists"));
+        Assert.Equal(1, await RowCountAsync("smtp_configurations"));
 
         // The fix: every artifact apply/deploy purges these central-only rows.
         await _storage.PurgeCentralOnlyNotificationConfigAsync();
 
         // Both tables are now empty — the plaintext SMTP credential is gone.
-        Assert.Empty(await repo.GetAllNotificationListsAsync());
-        Assert.Empty(await repo.GetAllSmtpConfigurationsAsync());
+        Assert.Equal(0, await RowCountAsync("notification_lists"));
+        Assert.Equal(0, await RowCountAsync("smtp_configurations"));
     }
 
     [Fact]
@@ -172,9 +192,8 @@ public class ArtifactStorageTests : IAsyncLifetime, IDisposable
         await _storage.PurgeCentralOnlyNotificationConfigAsync();
         await _storage.PurgeCentralOnlyNotificationConfigAsync();
 
-        var repo = new SiteNotificationRepository(_storage);
-        Assert.Empty(await repo.GetAllNotificationListsAsync());
-        Assert.Empty(await repo.GetAllSmtpConfigurationsAsync());
+        Assert.Equal(0, await RowCountAsync("notification_lists"));
+        Assert.Equal(0, await RowCountAsync("smtp_configurations"));
     }
 
     // ── Schema includes all WP-33 tables ──
@@ -186,7 +205,9 @@ public class ArtifactStorageTests : IAsyncLifetime, IDisposable
         await _storage.StoreSharedScriptAsync("s", "code", null, null);
         await _storage.StoreExternalSystemAsync("e", "url", "None", null, null);
         await _storage.StoreDatabaseConnectionAsync("d", "connstr", 1, TimeSpan.Zero);
-        await _storage.StoreNotificationListAsync("n", ["email@test.com"]);
+
+        // notification_lists / smtp_configurations remain in the schema (kept for the
+        // security purge) — their presence is exercised by the purge tests above.
 
         // All succeeded without exceptions = tables exist
     }
diff --git a/tests/ZB.MOM.WW.ScadaBridge.SiteRuntime.Tests/Repositories/SiteRepositoryTests.cs b/tests/ZB.MOM.WW.ScadaBridge.SiteRuntime.Tests/Repositories/SiteRepositoryTests.cs
index 14b1f08b..a5b68ffb 100644
--- a/tests/ZB.MOM.WW.ScadaBridge.SiteRuntime.Tests/Repositories/SiteRepositoryTests.cs
+++ b/tests/ZB.MOM.WW.ScadaBridge.SiteRuntime.Tests/Repositories/SiteRepositoryTests.cs
@@ -199,25 +199,8 @@ public class SiteRepositoryTests : IDisposable
         Assert.Null(await repo.GetDatabaseConnectionByNameAsync("DoesNotExist"));
     }
 
-    /// <summary>
-    /// SiteRuntime-007: the same stability guarantee for notification lists.
-    /// </summary>
-    [Fact]
-    public async Task NotificationRepository_SyntheticId_IsStableAcrossRestart()
-    {
-        var storage1 = NewStorage();
-        await storage1.InitializeAsync();
-        await storage1.StoreNotificationListAsync(
-            "OnCall", new[] { "a@example.com", "b@example.com" });
-
-        var repo1 = new SiteNotificationRepository(storage1);
-        var idBeforeRestart = (await repo1.GetAllNotificationListsAsync())[0].Id;
-
-        var storage2 = NewStorage();
-        var repo2 = new SiteNotificationRepository(storage2);
-        var found = await repo2.GetNotificationListByIdAsync(idBeforeRestart);
-
-        Assert.NotNull(found);
-        Assert.Equal("OnCall", found.Name);
-    }
+    // NotificationRepository_SyntheticId_IsStableAcrossRestart was removed 2026-07-10
+    // (arch-review 08 §1.3/#23) along with the vestigial SiteNotificationRepository —
+    // notification config is central-only and never lives on a site. The synthetic-ID
+    // stability guarantee is still exercised by ExternalSystemRepository_SyntheticId_IsStableAcrossRestart.
 }