Merge pull request #86 : feat(discord): enable session join leave buttons

fix(shared): enable dapper aot for session handlers
feat(discord): enable session join leave buttons
2026-05-20 09:09:51 +03:00 · 2026-05-20 09:01:34 +03:00 · 2026-05-19 14:13:48 +03:00 · 2026-05-19 12:53:35 +03:00 · 2026-05-19 12:36:17 +03:00 · 2026-05-19 12:30:25 +03:00
48 changed files with 2883 additions and 96 deletions
@@ -6,7 +6,7 @@ on:
      - main 

 env:
-  VERSION: 2.2.0
+  VERSION: 2.5.0

 jobs:
  # ЧАСТЬ 1: Собираем образы и кладем в Gitea (чтобы делиться с ребятами)
@@ -0,0 +1,144 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Build, Test, and Development Commands
+
+This is a .NET 10 solution using the modern XML-based `.slnx` format. The global SDK version is `10.0.100` with `rollForward: latestFeature`.
+
+**Build the solution:**
+```bash
+dotnet build
+```
+
+**Build individual projects (the CI does this to include SAST via SecurityCodeScan):**
+```bash
+dotnet build src/GmRelay.Shared/GmRelay.Shared.csproj --no-restore
+dotnet build src/GmRelay.Bot/GmRelay.Bot.csproj --no-restore
+dotnet build src/GmRelay.Web/GmRelay.Web.csproj --no-restore
+```
+
+**Run all tests:**
+```bash
+dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --verbosity normal
+```
+
+**Run a single test class or method:**
+```bash
+dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~YourTestClassName"
+```
+
+**Lint and format:**
+```bash
+dotnet format --verify-no-changes --verbosity diagnostic   # CI enforcement
+dotnet format                                                  # Apply fixes
+```
+
+**Check for vulnerable packages:**
+```bash
+dotnet list package --vulnerable --include-transitive
+```
+
+**Restore with lock file verification:**
+The repo enforces `RestorePackagesWithLockFile=true`. After adding or updating packages, commit the updated `packages.lock.json` files or the Trivy scan in CI will fail.
+
+**Run locally with Aspire (dev orchestration):**
+```bash
+dotnet run --project src/GmRelay.AppHost/GmRelay.AppHost.csproj
+```
+This automatically starts PostgreSQL in a container, the Bot, and the Web dashboard.
+
+**Run locally with Docker Compose (production-like):**
+```bash
+cp .env.example .env
+# Edit .env with your TELEGRAM_BOT_TOKEN, TELEGRAM_BOT_USERNAME, POSTGRES_PASSWORD
+docker compose up -d
+```
+
+## High-Level Architecture
+
+### Project Roles and Runtime Model
+
+| Project | Runtime | Key Trait |
+|---|---|---|
+| `GmRelay.Bot` | `Microsoft.NET.Sdk.Worker` | **Native AOT** binary. Telegram long polling bot + stateless scheduler. |
+| `GmRelay.Web` | `Microsoft.NET.Sdk.Web` | Blazor Server dashboard. Cookie auth via Telegram Login Widget / Mini App `initData`. |
+| `GmRelay.Shared` | Plain library | Domain models and platform-neutral view builders. **Must not depend on `Telegram.Bot`**. |
+| `GmRelay.ServiceDefaults` | Aspire shared project | OpenTelemetry, health checks, HTTP resilience. Referenced by both Bot and Web. |
+| `GmRelay.AppHost` | Aspire orchestrator | Dev-only. Spins up PostgreSQL and wires Bot + Web with service discovery. |
+
+**Important:** `README.md` references `GmRelay.Migrator` and `GmRelay.Worker`, but these projects do not exist. Migrations (`DbUp`) and background workers (`BackgroundService`) live inside `GmRelay.Bot`.
+
+### Vertical Slice Architecture with Explicit DI
+
+Each use case is a self-contained vertical slice: a C# record (Command/Query) + Handler class with all logic (SQL, Telegram API calls, validation). There are no abstract repository interfaces or service layers.
+
+Because the Bot is compiled as Native AOT (`PublishAot=true`, `EnableTrimAnalyzer=true`), **all DI registrations are explicit** in `src/GmRelay.Bot/Program.cs`. There is no assembly scanning or reflection-based discovery. When adding a new handler, you must register it manually in Program.cs.
+
+### Database Access: Npgsql + Dapper.AOT + DbUp
+
+**No EF Core** — it is incompatible with Native AOT. The stack is:
+- **Npgsql** ADO.NET for connections.
+- **Dapper 2.1.72** with **Dapper.AOT 1.0.48** for compile-time source-generated mapping (AOT-safe).
+- **DbUp 7.0.1** for migrations. SQL scripts are embedded resources in `src/GmRelay.Bot/Migrations/` (V001 through V015).
+- `DbMigrator.MigrateUp()` runs on every Bot startup.
+
+Both Bot and Web share the same PostgreSQL database. Web registers `NpgsqlDataSource` via `builder.AddNpgsqlDataSource("gmrelaydb")` (Aspire integration), while Bot registers it manually to avoid reflection-based Aspire configuration at AOT time.
+
+### Platform-Neutral Rendering (ADR-002)
+
+Rendering is split into two stages:
+1. **View Builder** (`GmRelay.Shared`) — platform-agnostic view model from domain DTOs.
+2. **Platform Renderer** — `TelegramSessionBatchRenderer` lives in both `GmRelay.Bot` and `GmRelay.Web` (temporary duplication until a third Telegram consumer justifies extracting `GmRelay.Shared.Telegram`).
+
+This means `GmRelay.Shared` must remain free of `Telegram.Bot` types. If you need to add rendering logic that produces `InlineKeyboardMarkup`, it belongs in the Bot or Web project, not Shared.
+
+### Stateless Scheduling
+
+The session scheduler (`SessionSchedulerService`) is a `BackgroundService` with a `PeriodicTimer(TimeSpan.FromMinutes(1))`. On each tick it queries PostgreSQL for sessions needing action (T-24h confirmation, T-5min join link) and updates their status. There is no in-memory state — the database is the single source of truth. This design was chosen specifically because Quartz.NET is incompatible with Native AOT.
+
+### Health Checks
+
+- **Bot:** Custom `BotHealthCheckHostedService` listens on port 8081. The Docker health check hits `localhost:8081/health`.
+- **Web:** Standard ASP.NET Core health checks on `/health` (JSON response with status and timestamp) and `/alive` (liveness probe tag filter). Exposed via `GmRelay.ServiceDefaults`.
+
+### Authentication and Security
+
+- **Telegram Login Widget** and **Mini App `initData`** verification via HMAC-SHA256. Cookie auth is hardened (`HttpOnly`, `SecurePolicy.Always`, `SameSite.Strict`).
+- Web Data Protection keys are persisted to `/app/dataprotection-keys` (Docker volume `web_keys`).
+- Security headers middleware (`X-Content-Type-Options`, `X-Frame-Options`, `Referrer-Policy`, `Permissions-Policy`) is applied globally in Web.
+- `SecurityCodeScan.VS2019` (5.6.7) is included in all projects via `Directory.Build.props` for SAST at build time.
+- Connection string passwords are redacted in logs via `SecretRedactor`.
+
+### CI/CD Pipeline
+
+`.gitea/workflows/pr-checks.yml` runs on every PR to `main`:
+1. `dotnet restore`
+2. Verify `packages.lock.json` files exist for Trivy
+3. `dotnet format --verify-no-changes`
+4. `dotnet list package --vulnerable`
+5. Trivy filesystem scan (`vuln,misconfig,secret`, HIGH/CRITICAL)
+6. Build Shared → Bot → Web
+7. Run tests
+
+`.gitea/workflows/deploy.yml` runs on push to `main`:
+1. Build and push `gmrelay-bot` and `gmrelay-web` images to `git.codeanddice.ru/toutsu/...`
+2. Trivy image scan on both images (HIGH/CRITICAL, exit-code 1)
+3. Create `.env` from secrets and run `docker compose up -d`
+
+### Environment Configuration
+
+Key environment variables (see `.env.example`):
+- `TELEGRAM_BOT_TOKEN`, `TELEGRAM_BOT_USERNAME`, `TELEGRAM_MINI_APP_URL`
+- `POSTGRES_PASSWORD`
+- `GMRELAY_WEB_PORT` (default 8080)
+- `ConnectionStrings__gmrelaydb` — used by both Bot and Web
+
+The Bot reads config as `Telegram:BotToken` (colon) which maps from `Telegram__BotToken` (double underscore) via environment variables.
+
+### Docker Images
+
+- **Bot:** Multi-stage Dockerfile. Build stage uses `sdk:10.0-noble` with `clang` and `zlib1g-dev` for AOT compilation. Final stage uses `runtime-deps:10.0-noble`. Exposes 8081.
+- **Web:** Multi-stage Dockerfile. Build stage uses `sdk:10.0-noble`. Final stage uses `aspnet:10.0-noble` with `libgssapi-krb5-2` and `wget`. Exposes 8080.
+
+Both images are built for multi-arch (`linux/amd64`, `linux/arm64`) to support Raspberry Pi 5 (ARM64) deployment.
@@ -1,6 +1,6 @@
 <Project>
  <PropertyGroup>
-    <Version>2.2.0</Version>
+    <Version>2.5.0</Version>
    <TargetFramework>net10.0</TargetFramework>
    <LangVersion>preview</LangVersion>
    <Nullable>enable</Nullable>
@@ -4,7 +4,7 @@

 Проект разработан с упором на производительность, архитектуру Vertical Slice, Native AOT (для бота) и удобство развертывания с использованием .NET Aspire.

-**Текущая версия:** `v2.2.0`.
+**Текущая версия:** `v2.5.0`.

 ---

@@ -24,6 +24,11 @@
 - **⬆️ Управление очередью**: Веб-интерфейс показывает заполненность, лист ожидания и позволяет ГМу поднять первого игрока из очереди.
 - **🔄 Автоматическая синхронизация**: Любые изменения в веб-интерфейсе мгновенно обновляют сообщения с расписанием в Telegram-чатах игроков.

+### Discord Bot
+- **Slash-команды расписания**: GM создаёт сессию через `/newsession` и публикует актуальное расписание через `/listsessions`.
+- **Кнопки записи и выхода**: игроки нажимают Join/Leave в Discord-сообщении; бот отвечает ephemeral-сообщением и обновляет schedule message.
+- **Лимиты и waitlist**: при заполненном составе игрок попадает в waitlist, а при выходе участника первый ожидающий автоматически продвигается в основной состав.
+
 ### 🌐 Web Dashboard (Blazor Server)
 - **🔐 Авторизация через Telegram**: Telegram Login Widget с HMAC-SHA256 валидацией.
 - **📱 Telegram Mini App Dashboard**: Мобильная панель открывается из Telegram, проверяет `initData` на сервере, учитывает safe-area телефона и верхнюю панель Telegram.
@@ -108,6 +113,8 @@ docker compose up -d
 1. Напишите боту `/start`.
 2. Создайте группу через `/newgroup`.
 3. Откройте Mini App или Web Dashboard для расширенного управления.
+4. Для Discord пригласите application bot на сервер с правами `bot` и `applications.commands`.
+5. В Discord создайте сессию через `/newsession` или опубликуйте расписание через `/listsessions`; игроки записываются и выходят кнопками в опубликованном сообщении.

 ## 💾 Backup и восстановление

@@ -49,7 +49,7 @@ services:
        crond -f

  bot:
-    image: git.codeanddice.ru/toutsu/gmrelay-bot:2.2.0
+    image: git.codeanddice.ru/toutsu/gmrelay-bot:2.5.0
    restart: always
    depends_on:
      db:
@@ -67,7 +67,7 @@ services:
      retries: 3

  discord:
-    image: git.codeanddice.ru/toutsu/gmrelay-discord-bot:2.2.0
+    image: git.codeanddice.ru/toutsu/gmrelay-discord-bot:2.5.0
    restart: always
    depends_on:
      db:
@@ -79,7 +79,7 @@ services:
      - gmrelay

  web:
-    image: git.codeanddice.ru/toutsu/gmrelay-web:2.2.0
+    image: git.codeanddice.ru/toutsu/gmrelay-web:2.5.0
    restart: always
    depends_on:
      db:
@@ -1,4 +1,4 @@
-# GM-Relay — C4 Model
+# GM-Relay - C4 Model

 ## Level 1: System Context

@@ -6,19 +6,24 @@
 C4Context
    title GM-Relay System Context

-    Person(gm, "Game Master", "Создаёт сессии, управляет расписанием игр")
-    Person(player, "Player", "Подтверждает участие через inline-кнопки")
+    Person(gm, "Game Master", "Creates sessions and manages schedules")
+    Person(player, "Player", "Joins, leaves, confirms, and receives reminders")

-    System(gmrelay, "GM-Relay Bot", "Telegram Worker Service на Raspberry Pi. Управляет подтверждениями, рассылает напоминания и ссылки.")
+    System(gmrelay, "GM-Relay", "Telegram bot, Discord worker, web dashboard, and shared scheduling logic")

-    System_Ext(telegram, "Telegram Bot API", "Long Polling. Сообщения, inline keyboards, callback queries.")
-    SystemDb_Ext(postgres, "PostgreSQL", "Сессии, игроки, RSVP-статусы")
+    System_Ext(telegram, "Telegram Bot API", "Commands, inline keyboards, callback queries, Mini App entry points")
+    System_Ext(discord, "Discord Gateway and REST API", "Slash commands, button interactions, message edits, ephemeral replies")
+    SystemDb_Ext(postgres, "PostgreSQL", "Sessions, players, participants, groups, platform identities")

-    Rel(gm, telegram, "Команды бота (/newsession)")
-    Rel(player, telegram, "Нажимает кнопки (✅ Буду / ❌ Не смогу)")
-    Rel(telegram, gmrelay, "Updates (Long Polling)")
+    Rel(gm, telegram, "Creates and manages sessions")
+    Rel(gm, discord, "Uses /newsession and /listsessions")
+    Rel(player, telegram, "Uses inline buttons")
+    Rel(player, discord, "Uses Join/Leave buttons")
+    Rel(telegram, gmrelay, "Updates via long polling")
+    Rel(discord, gmrelay, "Gateway events and component interactions")
    Rel(gmrelay, telegram, "SendMessage, EditMessage, AnswerCallbackQuery")
-    Rel(gmrelay, postgres, "SQL (Npgsql + Dapper)")
+    Rel(gmrelay, discord, "Send/edit schedule messages and ephemeral interaction replies")
+    Rel(gmrelay, postgres, "SQL via Npgsql and Dapper")
 ```

 ## Level 2: Container
@@ -30,49 +35,76 @@ C4Container
    Person(gm, "Game Master")
    Person(player, "Player")

-    System_Boundary(pi, "Raspberry Pi 5") {
-        Container(bot, "GmRelay.Bot", "Worker Service, .NET 10 AOT", "Long polling, обработка команд и callback queries, планировщик")
-        ContainerDb(db, "PostgreSQL 16", "Database", "sessions, players, session_participants, game_groups")
+    System_Boundary(runtime, "Docker Compose / Aspire runtime") {
+        Container(bot, "GmRelay.Bot", "Worker Service, .NET 10 AOT", "Telegram long polling, commands, callback routing, reminders")
+        Container(discordBot, "GmRelay.DiscordBot", "Worker Service, .NET 10", "NetCord Gateway, slash commands, Join/Leave button interactions")
+        Container(web, "GmRelay.Web", "Blazor Server", "Dashboard, Mini App pages, editing and stats")
+        Container(shared, "GmRelay.Shared", ".NET library", "Shared domain models, rendering, and platform-neutral join/leave handlers")
+        ContainerDb(db, "PostgreSQL", "Database", "sessions, players, session_participants, game_groups, platform identities")
    }

    System_Ext(telegram, "Telegram Bot API")
+    System_Ext(discord, "Discord Gateway and REST API")

    Rel(gm, telegram, "Commands")
-    Rel(player, telegram, "Callback Queries")
-    Rel(telegram, bot, "GetUpdates (Long Polling)")
+    Rel(gm, discord, "Slash commands")
+    Rel(player, telegram, "Callback queries")
+    Rel(player, discord, "Button interactions")
+    Rel(telegram, bot, "GetUpdates")
+    Rel(discord, discordBot, "Gateway events")
    Rel(bot, telegram, "Bot API calls")
+    Rel(discordBot, discord, "REST send/edit/reply calls")
+    Rel(bot, shared, "Uses shared renderers and join/leave handlers")
+    Rel(discordBot, shared, "Uses shared renderers and join/leave handlers")
+    Rel(web, shared, "Uses shared domain and rendering models")
    Rel(bot, db, "Npgsql + Dapper.AOT")
+    Rel(discordBot, db, "Npgsql + Dapper")
+    Rel(web, db, "Npgsql + Dapper")
 ```

-## Level 3: Component (GmRelay.Bot)
+## Level 3: Component - Session Interactions

 ```mermaid
 C4Component
-    title GmRelay.Bot Components
+    title Platform-Neutral Session Interactions

-    Container_Boundary(bot, "GmRelay.Bot") {
-        Component(polling, "TelegramBotService", "BackgroundService", "Long polling loop, получает Updates")
-        Component(router, "UpdateRouter", "C#", "Маршрутизирует Update → Handler по типу")
-        Component(scheduler, "SessionSchedulerService", "BackgroundService", "PeriodicTimer(60s): T-24ч и T-5мин триггеры")
-        Component(migrator, "DbMigrator", "DbUp", "SQL миграции при старте")
-
-        Component(confirm, "SendConfirmationHandler", "Feature", "Отправляет inline keyboard за 24ч")
-        Component(rsvp, "HandleRsvpHandler", "Feature", "Обрабатывает ✅/❌, проверяет all-confirmed")
-        Component(link, "SendJoinLinkHandler", "Feature", "Отправляет join link за 5 мин")
+    Container_Boundary(shared, "GmRelay.Shared") {
+        Component(join, "JoinSessionHandler", "Feature handler", "Adds players as Active or Waitlisted with session row locking")
+        Component(leave, "LeaveSessionHandler", "Feature handler", "Removes players and promotes the first waitlisted player when capacity allows")
+        Component(updateLock, "ScheduleMessageUpdateLock", "In-memory keyed lock", "Serializes DB changes and schedule message edits per platform message")
+        Component(renderer, "SessionBatchViewBuilder", "Renderer model builder", "Builds platform-neutral schedule views and actions")
    }

-    System_Ext(telegram, "Telegram Bot API")
-    ContainerDb(db, "PostgreSQL")
+    Container_Boundary(discordBot, "GmRelay.DiscordBot") {
+        Component(discordModule, "DiscordSessionInteractionModule", "NetCord component module", "Maps join_session/leave_session buttons to neutral commands")
+        Component(discordMessenger, "DiscordPlatformMessenger", "IPlatformMessenger", "Edits Discord schedule messages and stores interaction replies")
+    }

-    Rel(polling, router, "Update")
-    Rel(router, rsvp, "CallbackQuery rsvp:*")
-    Rel(scheduler, confirm, "T-24h trigger")
-    Rel(scheduler, link, "T-5min trigger")
-    Rel(confirm, telegram, "SendMessage + InlineKeyboard")
-    Rel(rsvp, telegram, "EditMessage + AnswerCallback")
-    Rel(link, telegram, "SendMessage + user mentions")
-    Rel(confirm, db, "SELECT/UPDATE sessions")
-    Rel(rsvp, db, "UPDATE participants, SELECT counts")
-    Rel(link, db, "SELECT confirmed players")
-    Rel(migrator, db, "DDL migrations")
+    Container_Boundary(bot, "GmRelay.Bot") {
+        Component(updateRouter, "UpdateRouter", "Telegram adapter", "Maps callback queries to neutral commands")
+        Component(telegramMessenger, "TelegramPlatformMessenger", "IPlatformMessenger", "Edits Telegram schedule messages and answers callback queries")
+    }
+
+    ContainerDb(db, "PostgreSQL")
+    System_Ext(telegram, "Telegram Bot API")
+    System_Ext(discord, "Discord Gateway and REST API")
+
+    Rel(discord, discordModule, "Button interaction")
+    Rel(discordModule, join, "JoinSessionCommand")
+    Rel(discordModule, leave, "LeaveSessionCommand")
+    Rel(discordModule, discord, "Deferred ephemeral reply, then modify response")
+    Rel(updateRouter, join, "JoinSessionCommand")
+    Rel(updateRouter, leave, "LeaveSessionCommand")
+    Rel(join, updateLock, "Acquire by PlatformMessageRef")
+    Rel(leave, updateLock, "Acquire by PlatformMessageRef")
+    Rel(join, db, "SELECT FOR UPDATE, INSERT participant")
+    Rel(leave, db, "SELECT FOR UPDATE, DELETE/promote participant")
+    Rel(join, renderer, "Build updated schedule view")
+    Rel(leave, renderer, "Build updated schedule view")
+    Rel(join, discordMessenger, "Update Discord schedule when command is Discord")
+    Rel(leave, discordMessenger, "Update Discord schedule when command is Discord")
+    Rel(join, telegramMessenger, "Update Telegram schedule when command is Telegram")
+    Rel(leave, telegramMessenger, "Update Telegram schedule when command is Telegram")
+    Rel(discordMessenger, discord, "ModifyMessage + ephemeral text")
+    Rel(telegramMessenger, telegram, "EditMessage + AnswerCallbackQuery")
 ```
@@ -0,0 +1,984 @@
+# Discord /newsession и /listsessions — Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:test-driven-development (TDD) for every task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Реализовать slash-команды `/newsession` и `/listsessions` в Discord-боте, позволяющие создавать батчи сессий и просматривать расписание без Web Dashboard.
+
+**Architecture:** Каждая команда — отдельный vertical slice в `GmRelay.DiscordBot`: парсер входных данных → handler с SQL (через Dapper) → отправка через NetCord REST API. Рендеринг переиспользует существующий `DiscordSessionBatchRenderer`. Данные пишутся в общую PostgreSQL модель через platform-agnostic колонки (`platform`, `external_group_id`, `external_user_id`).
+
+**Tech Stack:** .NET 10, NetCord 1.0.0-alpha.489, NetCord.Hosting.Services, Dapper, Npgsql, xUnit.
+
+**Version Bump:** minor (2.3.0 → 2.4.0) — новый функционал.
+
+---
+
+## File Structure
+
+| File | Responsibility |
+|------|--------------|
+| `src/GmRelay.DiscordBot/Features/Sessions/DiscordNewSessionCommand.cs` | Slash-команда `/newsession` с параметрами (title, time, seats, link) |
+| `src/GmRelay.DiscordBot/Features/Sessions/DiscordNewSessionHandler.cs` | Handler создания batch + sessions в БД, проверка прав |
+| `src/GmRelay.DiscordBot/Features/Sessions/DiscordListSessionsCommand.cs` | Slash-команда `/listsessions` |
+| `src/GmRelay.DiscordBot/Features/Sessions/DiscordListSessionsHandler.cs` | Handler запроса активных сессий и публикации embed |
+| `src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPermissionChecker.cs` | Проверка прав пользователя в guild (owner/admin/manager) |
+| `src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPlatformMessenger.cs` | Реализация `IPlatformMessenger` для отправки/обновления расписания в Discord |
+| `tests/GmRelay.Bot.Tests/Discord/DiscordNewSessionHandlerTests.cs` | TDD-тесты создания сессий из Discord |
+| `tests/GmRelay.Bot.Tests/Discord/DiscordListSessionsHandlerTests.cs` | TDD-тесты вывода расписания |
+| `tests/GmRelay.Bot.Tests/Discord/DiscordPermissionCheckerTests.cs` | TDD-тесты проверки прав |
+| `src/GmRelay.DiscordBot/Program.cs` | Регистрация DI: handlers, permission checker, platform messenger |
+
+---
+
+## Task 1: DiscordPermissionChecker
+
+**Files:**
+- Create: `src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPermissionChecker.cs`
+- Test: `tests/GmRelay.Bot.Tests/Discord/DiscordPermissionCheckerTests.cs`
+
+**Context:** Discord использует guild-роли. Для MVP достаточно проверки: пользователь — owner guild, имеет роль `Administrator`, или записан как `group_managers` в БД для данной `game_groups`.
+
+### Step 1.1: Write the failing test
+
+```csharp
+using GmRelay.DiscordBot.Infrastructure.Discord;
+
+namespace GmRelay.Bot.Tests.Discord;
+
+public sealed class DiscordPermissionCheckerTests
+{
+    [Fact]
+    public void CanManageSchedule_WhenUserIsGuildOwner_ReturnsTrue()
+    {
+        var checker = new DiscordPermissionChecker();
+        var result = checker.CanManageSchedule(
+            guildOwnerId: 123456789ul,
+            userId: 123456789ul,
+            userRoles: Array.Empty<ulong>(),
+            dbManagerUserIds: Array.Empty<ulong>());
+
+        Assert.True(result);
+    }
+
+    [Fact]
+    public void CanManageSchedule_WhenUserHasAdministratorRole_ReturnsTrue()
+    {
+        var checker = new DiscordPermissionChecker();
+        var adminRole = 999ul;
+        var result = checker.CanManageSchedule(
+            guildOwnerId: 123456789ul,
+            userId: 987654321ul,
+            userRoles: new[] { adminRole },
+            dbManagerUserIds: Array.Empty<ulong>());
+
+        Assert.True(result);
+    }
+
+    [Fact]
+    public void CanManageSchedule_WhenUserIsDbManager_ReturnsTrue()
+    {
+        var checker = new DiscordPermissionChecker();
+        var managerId = 555ul;
+        var result = checker.CanManageSchedule(
+            guildOwnerId: 123456789ul,
+            userId: managerId,
+            userRoles: Array.Empty<ulong>(),
+            dbManagerUserIds: new[] { managerId });
+
+        Assert.True(result);
+    }
+
+    [Fact]
+    public void CanManageSchedule_WhenRegularUser_ReturnsFalse()
+    {
+        var checker = new DiscordPermissionChecker();
+        var result = checker.CanManageSchedule(
+            guildOwnerId: 123456789ul,
+            userId: 111ul,
+            userRoles: Array.Empty<ulong>(),
+            dbManagerUserIds: new[] { 222ul });
+
+        Assert.False(result);
+    }
+}
+```
+
+### Step 1.2: Run test to verify it fails
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordPermissionCheckerTests" --verbosity normal`
+Expected: FAIL — `DiscordPermissionChecker` not found.
+
+### Step 1.3: Write minimal implementation
+
+Create `src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPermissionChecker.cs`:
+
+```csharp
+namespace GmRelay.DiscordBot.Infrastructure.Discord;
+
+public sealed class DiscordPermissionChecker
+{
+    // Discord Administrator permission bitflag
+    private const ulong AdministratorPermission = 0x8;
+
+    public bool CanManageSchedule(
+        ulong guildOwnerId,
+        ulong userId,
+        IEnumerable<ulong> userRoles,
+        IEnumerable<ulong> dbManagerUserIds)
+    {
+        if (userId == guildOwnerId)
+            return true;
+
+        if (dbManagerUserIds.Contains(userId))
+            return true;
+
+        // NetCord provides permission resolution via GuildUser.Permissions;
+        // here we accept pre-resolved flag for simplicity.
+        // Actual command handler will pass resolved permissions.
+        return false;
+    }
+
+    public bool CanManageSchedule(ulong guildOwnerId, ulong userId, IEnumerable<ulong> dbManagerUserIds, ulong resolvedPermissions)
+    {
+        if (userId == guildOwnerId)
+            return true;
+
+        if (dbManagerUserIds.Contains(userId))
+            return true;
+
+        return (resolvedPermissions & AdministratorPermission) == AdministratorPermission;
+    }
+}
+```
+
+### Step 1.4: Run test to verify it passes
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordPermissionCheckerTests" --verbosity normal`
+Expected: PASS (4/4).
+
+### Step 1.5: Commit
+
+```bash
+git add src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPermissionChecker.cs tests/GmRelay.Bot.Tests/Discord/DiscordPermissionCheckerTests.cs
+git commit -m "feat(discord): add DiscordPermissionChecker for session management rights
+
+Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>"
+```
+
+---
+
+## Task 2: DiscordListSessionsHandler + Command
+
+**Files:**
+- Create: `src/GmRelay.DiscordBot/Features/Sessions/DiscordListSessionsHandler.cs`
+- Create: `src/GmRelay.DiscordBot/Features/Sessions/DiscordListSessionsCommand.cs`
+- Test: `tests/GmRelay.Bot.Tests/Discord/DiscordListSessionsHandlerTests.cs`
+
+**Context:** Handler должен:
+1. Найти `game_groups` по `external_group_id` = `guild_id`.
+2. Выбрать предстоящие сессии (`scheduled_at > NOW()`, `status != Cancelled`).
+3. Собрать участников.
+4. Построить view через `SessionBatchViewBuilder`.
+5. Отрендерить через `DiscordSessionBatchRenderer`.
+6. Отправить embed + buttons в Discord channel.
+
+### Step 2.1: Write the failing test
+
+Create `tests/GmRelay.Bot.Tests/Discord/DiscordListSessionsHandlerTests.cs`:
+
+```csharp
+using GmRelay.DiscordBot.Features.Sessions;
+using GmRelay.Shared.Domain;
+using GmRelay.Shared.Rendering;
+
+namespace GmRelay.Bot.Tests.Discord;
+
+public sealed class DiscordListSessionsHandlerTests
+{
+    [Fact]
+    public void BuildSchedule_WithSessions_ReturnsEmbedsAndButtons()
+    {
+        var sessionId = Guid.NewGuid();
+        var sessions = new[]
+        {
+            new SessionBatchDto(sessionId, DateTime.UtcNow.AddDays(1), SessionStatus.Planned, 4, "https://example.com")
+        };
+        var participants = Array.Empty<ParticipantBatchDto>();
+
+        var view = SessionBatchViewBuilder.Build("Test Campaign", sessions, participants);
+        var (embeds, actionRows) = GmRelay.DiscordBot.Rendering.DiscordSessionBatchRenderer.Render(view);
+
+        Assert.Single(embeds);
+        Assert.Single(actionRows);
+    }
+
+    [Fact]
+    public void BuildSchedule_WithCancelledSession_SkipsActionRows()
+    {
+        var cancelledSessionId = Guid.NewGuid();
+        var sessions = new[] { new SessionBatchDto(cancelledSessionId, DateTime.UtcNow.AddDays(1), SessionStatus.Cancelled, null, "") };
+        var participants = Array.Empty<ParticipantBatchDto>();
+
+        var view = SessionBatchViewBuilder.Build("Test Campaign", sessions, participants);
+        var (embeds, actionRows) = GmRelay.DiscordBot.Rendering.DiscordSessionBatchRenderer.Render(view);
+
+        Assert.Single(embeds);
+        Assert.Empty(actionRows);
+    }
+}
+```
+
+### Step 2.2: Run test — verify RED
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordListSessionsHandlerTests" --verbosity normal`
+Expected: FAIL — `DiscordListSessionsHandler` not found.
+
+### Step 2.3: Write minimal implementation
+
+Create `src/GmRelay.DiscordBot/Features/Sessions/DiscordListSessionsHandler.cs`:
+
+```csharp
+using Dapper;
+using GmRelay.Shared.Domain;
+using GmRelay.Shared.Rendering;
+using NetCord.Rest;
+using Npgsql;
+
+namespace GmRelay.DiscordBot.Features.Sessions;
+
+internal sealed record DiscordSessionListItemDto(
+    Guid Id, string Title, DateTime ScheduledAt, string Status, int? MaxPlayers,
+    int PlayerCount, int WaitlistCount);
+
+public sealed class DiscordListSessionsHandler(NpgsqlDataSource dataSource)
+{
+    public async Task<SessionBatchViewModel?> BuildScheduleAsync(
+        string guildId,
+        string channelId,
+        CancellationToken cancellationToken)
+    {
+        await using var connection = await dataSource.OpenConnectionAsync(cancellationToken);
+
+        var sessions = await connection.QueryAsync<DiscordSessionListItemDto>(
+            @"SELECT s.id as Id, s.title as Title, s.scheduled_at as ScheduledAt, s.status as Status,
+                     s.max_players as MaxPlayers,
+                     COUNT(sp.id) FILTER (WHERE sp.is_gm = false AND sp.registration_status = @Active) as PlayerCount,
+                     COUNT(sp.id) FILTER (WHERE sp.is_gm = false AND sp.registration_status = @Waitlisted) as WaitlistCount
+              FROM sessions s
+              JOIN game_groups g ON s.group_id = g.id
+              LEFT JOIN session_participants sp ON s.id = sp.session_id
+              WHERE g.platform = 'Discord'
+                AND g.external_group_id = @GuildId
+                AND s.status != @Cancelled
+                AND s.scheduled_at > NOW()
+              GROUP BY s.id, s.title, s.scheduled_at, s.status, s.max_players
+              ORDER BY s.scheduled_at ASC",
+            new
+            {
+                GuildId = guildId,
+                Cancelled = SessionStatus.Cancelled,
+                Active = ParticipantRegistrationStatus.Active,
+                Waitlisted = ParticipantRegistrationStatus.Waitlisted
+            });
+
+        var sessionList = sessions.ToList();
+        if (sessionList.Count == 0)
+            return null;
+
+        var sessionIds = sessionList.Select(s => s.Id).ToList();
+        var participants = await connection.QueryAsync<ParticipantBatchDto>(
+            @"SELECT sp.session_id as SessionId,
+                     p.display_name as DisplayName,
+                     COALESCE(p.external_username, p.telegram_username) as TelegramUsername,
+                     sp.registration_status as RegistrationStatus
+              FROM session_participants sp
+              JOIN players p ON p.id = sp.player_id
+              WHERE sp.session_id = ANY(@SessionIds) AND sp.is_gm = false
+              ORDER BY sp.registration_status ASC, sp.created_at ASC",
+            new { SessionIds = sessionIds });
+
+        var firstTitle = sessionList.First().Title;
+        var batchDtos = sessionList.Select(s => new SessionBatchDto(
+            s.Id, s.ScheduledAt, s.Status, s.MaxPlayers, "")).ToList();
+
+        return SessionBatchViewBuilder.Build(firstTitle, batchDtos, participants.ToList());
+    }
+}
+```
+
+Create `src/GmRelay.DiscordBot/Features/Sessions/DiscordListSessionsCommand.cs`:
+
+```csharp
+using NetCord.Rest;
+using NetCord.Services.ApplicationCommands;
+
+namespace GmRelay.DiscordBot.Features.Sessions;
+
+[SlashCommand("listsessions", "Show upcoming game sessions in this server")]
+public class DiscordListSessionsCommand : SlashCommandModule<SlashCommandContext>
+{
+    private readonly DiscordListSessionsHandler _handler;
+
+    public DiscordListSessionsCommand(DiscordListSessionsHandler handler)
+    {
+        _handler = handler;
+    }
+
+    public override async Task ExecuteAsync()
+    {
+        var guildId = Context.Guild?.Id.ToString()
+            ?? throw new InvalidOperationException("This command can only be used in a guild.");
+        var channelId = Context.Channel.Id.ToString();
+
+        var view = await _handler.BuildScheduleAsync(guildId, channelId, Context.CancellationToken);
+
+        if (view is null)
+        {
+            await Context.Interaction.SendResponseAsync(
+                InteractionCallback.Message("📭 В этом сервере нет предстоящих игр."));
+            return;
+        }
+
+        var (embeds, actionRows) = Rendering.DiscordSessionBatchRenderer.Render(view);
+
+        await Context.Interaction.SendResponseAsync(
+            InteractionCallback.Message(new InteractionMessageProperties()
+                .WithEmbeds(embeds)
+                .WithComponents(actionRows)));
+    }
+}
+```
+
+### Step 2.4: Run test — verify GREEN
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordListSessionsHandlerTests" --verbosity normal`
+Expected: PASS.
+
+### Step 2.5: Commit
+
+```bash
+git add src/GmRelay.DiscordBot/Features/Sessions/DiscordListSessionsHandler.cs src/GmRelay.DiscordBot/Features/Sessions/DiscordListSessionsCommand.cs tests/GmRelay.Bot.Tests/Discord/DiscordListSessionsHandlerTests.cs
+git commit -m "feat(discord): add /listsessions slash command and handler
+
+Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>"
+```
+
+---
+
+## Task 3: DiscordNewSessionHandler + Command
+
+**Files:**
+- Create: `src/GmRelay.DiscordBot/Features/Sessions/DiscordNewSessionHandler.cs`
+- Create: `src/GmRelay.DiscordBot/Features/Sessions/DiscordNewSessionCommand.cs`
+- Test: `tests/GmRelay.Bot.Tests/Discord/DiscordNewSessionHandlerTests.cs`
+
+**Context:** Handler должен:
+1. Проверить права пользователя (owner/admin/manager).
+2. Upsert игрока (GM) в `players` с `platform = 'Discord'`.
+3. Upsert `game_groups` с `platform = 'Discord'`, `external_group_id = guild_id`.
+4. Создать batch + sessions.
+5. Отправить rendered schedule в Discord channel.
+6. Сохранить `platform_messages` reference.
+
+### Step 3.1: Write the failing test
+
+Create `tests/GmRelay.Bot.Tests/Discord/DiscordNewSessionHandlerTests.cs`:
+
+```csharp
+using GmRelay.DiscordBot.Features.Sessions;
+
+namespace GmRelay.Bot.Tests.Discord;
+
+public sealed class DiscordNewSessionHandlerTests
+{
+    [Fact]
+    public void ParseTimeInput_ShouldParseDiscordDateFormat()
+    {
+        var result = DiscordNewSessionHandler.ParseTimeInput("2026-05-20 19:30");
+        Assert.True(result.IsSuccess);
+        Assert.Equal(2026, result.Value.Year);
+        Assert.Equal(5, result.Value.Month);
+        Assert.Equal(20, result.Value.Day);
+        Assert.Equal(19, result.Value.Hour);
+        Assert.Equal(30, result.Value.Minute);
+    }
+
+    [Fact]
+    public void ParseTimeInput_ShouldRejectPastDate()
+    {
+        var result = DiscordNewSessionHandler.ParseTimeInput("2020-01-01 00:00");
+        Assert.False(result.IsSuccess);
+    }
+
+    [Fact]
+    public void ParseTimeInput_ShouldParseRussianDateFormat()
+    {
+        var result = DiscordNewSessionHandler.ParseTimeInput("20.05.2026 19:30");
+        Assert.True(result.IsSuccess);
+        Assert.Equal(2026, result.Value.Year);
+        Assert.Equal(5, result.Value.Month);
+        Assert.Equal(20, result.Value.Day);
+    }
+
+    [Fact]
+    public void ParseTimeInput_ShouldRejectInvalidFormat()
+    {
+        var result = DiscordNewSessionHandler.ParseTimeInput("not-a-date");
+        Assert.False(result.IsSuccess);
+        Assert.NotNull(result.Error);
+    }
+}
+```
+
+### Step 3.2: Run test — verify RED
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordNewSessionHandlerTests" --verbosity normal`
+Expected: FAIL — `DiscordNewSessionHandler` not found.
+
+### Step 3.3: Write minimal implementation
+
+Create `src/GmRelay.DiscordBot/Features/Sessions/DiscordNewSessionHandler.cs`:
+
+```csharp
+using Dapper;
+using GmRelay.DiscordBot.Infrastructure.Discord;
+using GmRelay.Shared.Domain;
+using GmRelay.Shared.Platform;
+using GmRelay.Shared.Rendering;
+using Npgsql;
+
+namespace GmRelay.DiscordBot.Features.Sessions;
+
+public sealed record TimeParseResult(bool IsSuccess, DateTimeOffset Value, string? Error);
+
+public sealed class DiscordNewSessionHandler(
+    NpgsqlDataSource dataSource,
+    DiscordPermissionChecker permissionChecker,
+    IPlatformMessenger messenger,
+    ILogger<DiscordNewSessionHandler> logger)
+{
+    public static TimeParseResult ParseTimeInput(string input)
+    {
+        if (DateTimeOffset.TryParseExact(
+            input.Trim(),
+            "yyyy-MM-dd HH:mm",
+            System.Globalization.CultureInfo.InvariantCulture,
+            System.Globalization.DateTimeStyles.AssumeUniversal,
+            out var result))
+        {
+            if (result < DateTimeOffset.UtcNow)
+                return new TimeParseResult(false, default, "Дата находится в прошлом.");
+
+            return new TimeParseResult(true, result.ToUniversalTime(), null);
+        }
+
+        if (DateTimeOffset.TryParseExact(
+            input.Trim(),
+            "dd.MM.yyyy HH:mm",
+            System.Globalization.CultureInfo.InvariantCulture,
+            System.Globalization.DateTimeStyles.AssumeUniversal,
+            out var altResult))
+        {
+            if (altResult < DateTimeOffset.UtcNow)
+                return new TimeParseResult(false, default, "Дата находится в прошлом.");
+
+            return new TimeParseResult(true, altResult.ToUniversalTime(), null);
+        }
+
+        return new TimeParseResult(false, default, "Некорректный формат даты. Используйте YYYY-MM-DD HH:mm или DD.MM.YYYY HH:mm");
+    }
+
+    public async Task<SessionBatchViewModel> HandleAsync(
+        string guildId,
+        string channelId,
+        ulong userId,
+        string userDisplayName,
+        IEnumerable<ulong> userRoles,
+        ulong guildOwnerId,
+        string title,
+        DateTimeOffset scheduledAt,
+        int? maxPlayers,
+        string? joinLink,
+        CancellationToken cancellationToken)
+    {
+        await using var connection = await dataSource.OpenConnectionAsync(cancellationToken);
+
+        // Resolve db managers
+        var dbManagerUserIds = await connection.QueryAsync<ulong>(
+            @"SELECT CAST(p.external_user_id AS BIGINT)
+              FROM group_managers gm
+              JOIN players p ON p.id = gm.player_id
+              JOIN game_groups g ON g.id = gm.group_id
+              WHERE g.platform = 'Discord' AND g.external_group_id = @GuildId",
+            new { GuildId = guildId });
+
+        if (!permissionChecker.CanManageSchedule(guildOwnerId, userId, userRoles, dbManagerUserIds))
+        {
+            throw new UnauthorizedAccessException("⛔ Только owner, администратор или manager могут создавать сессии.");
+        }
+
+        await using var transaction = await connection.BeginTransactionAsync(cancellationToken);
+        try
+        {
+            // Upsert player
+            await connection.ExecuteAsync(
+                @"INSERT INTO players (display_name, platform, external_user_id, external_username)
+                  VALUES (@Name, 'Discord', @UserId, @Name)
+                  ON CONFLICT (platform, external_user_id)
+                  WHERE platform IS NOT NULL AND external_user_id IS NOT NULL
+                  DO UPDATE SET display_name = EXCLUDED.display_name,
+                                external_username = EXCLUDED.external_username",
+                new { Name = userDisplayName, UserId = userId.ToString() },
+                transaction);
+
+            // Upsert group
+            var groupId = await connection.ExecuteScalarAsync<Guid>(
+                @"INSERT INTO game_groups (name, platform, external_group_id, external_channel_id)
+                  VALUES (@GuildId, 'Discord', @GuildId, @ChannelId)
+                  ON CONFLICT (platform, external_group_id)
+                  WHERE platform IS NOT NULL AND external_group_id IS NOT NULL
+                  DO UPDATE SET name = EXCLUDED.name,
+                                external_channel_id = COALESCE(EXCLUDED.external_channel_id, game_groups.external_channel_id)
+                  RETURNING id",
+                new { GuildId = guildId, ChannelId = channelId },
+                transaction);
+
+            // Ensure manager record
+            await connection.ExecuteAsync(
+                @"INSERT INTO group_managers (group_id, player_id, role)
+                  SELECT @GroupId, p.id, @OwnerRole
+                  FROM players p
+                  WHERE p.platform = 'Discord' AND p.external_user_id = @UserId
+                  ON CONFLICT (group_id, player_id) DO NOTHING",
+                new { GroupId = groupId, UserId = userId.ToString(), OwnerRole = GroupManagerRoleExtensions.OwnerValue },
+                transaction);
+
+            // Create batch + session
+            var batchId = Guid.NewGuid();
+            var sessionId = await connection.ExecuteScalarAsync<Guid>(
+                @"INSERT INTO sessions (batch_id, group_id, title, join_link, scheduled_at, status, max_players)
+                  VALUES (@BatchId, @GroupId, @Title, @Link, @ScheduledAt, @Status, @MaxPlayers)
+                  RETURNING id",
+                new
+                {
+                    BatchId = batchId,
+                    GroupId = groupId,
+                    Title = title,
+                    Link = joinLink ?? string.Empty,
+                    ScheduledAt = scheduledAt.UtcDateTime,
+                    Status = SessionStatus.Planned,
+                    MaxPlayers = maxPlayers
+                },
+                transaction);
+
+            await transaction.CommitAsync(cancellationToken);
+
+            var sessions = new[] { new SessionBatchDto(sessionId, scheduledAt.UtcDateTime, SessionStatus.Planned, maxPlayers, joinLink ?? string.Empty) };
+            var view = SessionBatchViewBuilder.Build(title, sessions, Array.Empty<ParticipantBatchDto>());
+
+            await messenger.SendScheduleAsync(
+                new PlatformScheduleMessage(
+                    new PlatformGroup(PlatformKind.Discord, guildId, guildId, channelId),
+                    view,
+                    null),
+                cancellationToken);
+
+            return view;
+        }
+        catch
+        {
+            await transaction.RollbackAsync(cancellationToken);
+            throw;
+        }
+    }
+}
+```
+
+Create `src/GmRelay.DiscordBot/Features/Sessions/DiscordNewSessionCommand.cs`:
+
+```csharp
+using NetCord.Rest;
+using NetCord.Services.ApplicationCommands;
+
+namespace GmRelay.DiscordBot.Features.Sessions;
+
+[SlashCommand("newsession", "Create a new game session")]
+public class DiscordNewSessionCommand : SlashCommandModule<SlashCommandContext>
+{
+    private readonly DiscordNewSessionHandler _handler;
+
+    public DiscordNewSessionCommand(DiscordNewSessionHandler handler)
+    {
+        _handler = handler;
+    }
+
+    [SlashCommandOption("title", "Game title", Required = true)]
+    public string Title { get; set; } = string.Empty;
+
+    [SlashCommandOption("time", "Session time (YYYY-MM-DD HH:mm or DD.MM.YYYY HH:mm)", Required = true)]
+    public string Time { get; set; } = string.Empty;
+
+    [SlashCommandOption("seats", "Maximum number of players", Required = false)]
+    public long? Seats { get; set; }
+
+    [SlashCommandOption("link", "Join link", Required = false)]
+    public string? Link { get; set; }
+
+    public override async Task ExecuteAsync()
+    {
+        var guild = Context.Guild
+            ?? throw new InvalidOperationException("This command can only be used in a guild.");
+
+        var timeResult = DiscordNewSessionHandler.ParseTimeInput(Time);
+        if (!timeResult.IsSuccess)
+        {
+            await Context.Interaction.SendResponseAsync(
+                InteractionCallback.Message($"❌ {timeResult.Error}"));
+            return;
+        }
+
+        try
+        {
+            var view = await _handler.HandleAsync(
+                guildId: guild.Id.ToString(),
+                channelId: Context.Channel.Id.ToString(),
+                userId: Context.User.Id,
+                userDisplayName: Context.User.GlobalName ?? Context.User.Username,
+                userRoles: Context.GuildUser!.RoleIds,
+                guildOwnerId: guild.OwnerId,
+                title: Title,
+                scheduledAt: timeResult.Value,
+                maxPlayers: Seats is null ? null : (int)Seats.Value,
+                joinLink: Link,
+                Context.CancellationToken);
+
+            await Context.Interaction.SendResponseAsync(
+                InteractionCallback.Message("✅ Сессия создана!"));
+        }
+        catch (UnauthorizedAccessException ex)
+        {
+            await Context.Interaction.SendResponseAsync(
+                InteractionCallback.Message($"⛅ {ex.Message}"));
+        }
+        catch (Exception ex)
+        {
+            await Context.Interaction.SendResponseAsync(
+                InteractionCallback.Message("💥 Произошла ошибка при создании сессии."));
+        }
+    }
+}
+```
+
+### Step 3.4: Run test — verify GREEN
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordNewSessionHandlerTests" --verbosity normal`
+Expected: PASS.
+
+### Step 3.5: Commit
+
+```bash
+git add src/GmRelay.DiscordBot/Features/Sessions/DiscordNewSessionHandler.cs src/GmRelay.DiscordBot/Features/Sessions/DiscordNewSessionCommand.cs tests/GmRelay.Bot.Tests/Discord/DiscordNewSessionHandlerTests.cs
+git commit -m "feat(discord): add /newsession slash command and handler
+
+Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>"
+```
+
+---
+
+## Task 4: DiscordPlatformMessenger
+
+**Files:**
+- Create: `src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPlatformMessenger.cs`
+- Test: `tests/GmRelay.Bot.Tests/Discord/DiscordPlatformMessengerTests.cs`
+
+**Context:** Необходима реализация `IPlatformMessenger` для отправки schedule embeds и обновления существующих сообщений в Discord. Для MVP достаточно `SendScheduleAsync` и `UpdateScheduleAsync` (stub для остальных).
+
+### Step 4.1: Write the failing test
+
+Create `tests/GmRelay.Bot.Tests/Discord/DiscordPlatformMessengerTests.cs`:
+
+```csharp
+using GmRelay.DiscordBot.Infrastructure.Discord;
+using GmRelay.Shared.Platform;
+using GmRelay.Shared.Rendering;
+
+namespace GmRelay.Bot.Tests.Discord;
+
+public sealed class DiscordPlatformMessengerTests
+{
+    [Fact]
+    public void Constructor_ShouldAcceptRestClient()
+    {
+        // DiscordPlatformMessenger requires a NetCord.Rest.RestClient.
+        // We verify the type can be instantiated (RestClient itself is not easily unit-testable without a real token).
+        // This test proves the contract exists and compiles.
+        var constructor = typeof(DiscordPlatformMessenger).GetConstructor(new[] { typeof(NetCord.Rest.RestClient) });
+        Assert.NotNull(constructor);
+    }
+
+    [Fact]
+    public void DiscordPlatformMessenger_ShouldImplementIPlatformMessenger()
+    {
+        Assert.True(typeof(IPlatformMessenger).IsAssignableFrom(typeof(DiscordPlatformMessenger)));
+    }
+}
+```
+
+### Step 4.2: Run test — verify RED
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordPlatformMessengerTests" --verbosity normal`
+Expected: FAIL — `DiscordPlatformMessenger` not found.
+
+### Step 4.3: Write minimal implementation
+
+Create `src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPlatformMessenger.cs`:
+
+```csharp
+using GmRelay.DiscordBot.Rendering;
+using GmRelay.Shared.Platform;
+using GmRelay.Shared.Rendering;
+using NetCord;
+using NetCord.Rest;
+
+namespace GmRelay.DiscordBot.Infrastructure.Discord;
+
+public sealed class DiscordPlatformMessenger(RestClient restClient) : IPlatformMessenger
+{
+    public async Task<PlatformMessageRef> SendScheduleAsync(PlatformScheduleMessage message, CancellationToken ct)
+    {
+        var (embeds, actionRows) = DiscordSessionBatchRenderer.Render(message.View);
+
+        var channelId = ulong.Parse(message.Group.ExternalChannelId
+            ?? message.Group.ExternalGroupId);
+
+        var msg = await restClient.SendMessageAsync(
+            channelId,
+            new MessageProperties()
+                .WithEmbeds(embeds)
+                .WithComponents(actionRows),
+            ct);
+
+        return new PlatformMessageRef(
+            PlatformKind.Discord,
+            message.Group.ExternalGroupId,
+            null,
+            msg.Id.ToString());
+    }
+
+    public async Task UpdateScheduleAsync(PlatformScheduleMessage message, CancellationToken ct)
+    {
+        if (message.ExistingMessage is null)
+            return;
+
+        var (embeds, actionRows) = DiscordSessionBatchRenderer.Render(message.View);
+
+        var channelId = ulong.Parse(message.Group.ExternalChannelId
+            ?? message.Group.ExternalGroupId);
+        var messageId = ulong.Parse(message.ExistingMessage.ExternalMessageId);
+
+        await restClient.ModifyMessageAsync(
+            channelId,
+            messageId,
+            new MessageProperties()
+                .WithEmbeds(embeds)
+                .WithComponents(actionRows),
+            ct);
+    }
+
+    public Task SendGroupMessageAsync(PlatformGroup group, string htmlText, CancellationToken ct)
+    {
+        // MVP: not needed for /newsession and /listsessions
+        return Task.CompletedTask;
+    }
+
+    public Task SendPrivateMessageAsync(PlatformPrivateMessage message, CancellationToken ct)
+    {
+        // MVP: not needed
+        return Task.CompletedTask;
+    }
+
+    public Task AnswerInteractionAsync(PlatformInteractionReply reply, CancellationToken ct)
+    {
+        // MVP: not needed (commands answer inline via SlashCommandContext)
+        return Task.CompletedTask;
+    }
+
+    public Task SendCalendarFileAsync(PlatformCalendarFile file, CancellationToken ct)
+    {
+        // MVP: not needed
+        return Task.CompletedTask;
+    }
+}
+```
+
+### Step 4.4: Run test — verify GREEN
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordPlatformMessengerTests" --verbosity normal`
+Expected: PASS.
+
+### Step 4.5: Commit
+
+```bash
+git add src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPlatformMessenger.cs tests/GmRelay.Bot.Tests/Discord/DiscordPlatformMessengerTests.cs
+git commit -m "feat(discord): add DiscordPlatformMessenger IPlatformMessenger implementation
+
+Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>"
+```
+
+---
+
+## Task 5: Wire up DI and Register Commands
+
+**Files:**
+- Modify: `src/GmRelay.DiscordBot/Program.cs`
+
+### Step 5.1: Write the failing test (structure test)
+
+Modify `tests/GmRelay.Bot.Tests/Discord/DiscordStartupTests.cs` — add test that asserts new handlers are registered:
+
+```csharp
+[Fact]
+public void Program_ShouldRegisterDiscordSessionHandlers()
+{
+    var program = ReadProgram();
+    Assert.Contains("DiscordListSessionsHandler", program);
+    Assert.Contains("DiscordNewSessionHandler", program);
+    Assert.Contains("DiscordPermissionChecker", program);
+    Assert.Contains("DiscordPlatformMessenger", program);
+    Assert.Contains("IPlatformMessenger", program);
+}
+```
+
+### Step 5.2: Run test — verify RED
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordStartupTests" --verbosity normal`
+Expected: FAIL — asserts not found in Program.cs.
+
+### Step 5.3: Write minimal implementation
+
+Modify `src/GmRelay.DiscordBot/Program.cs`:
+
+```csharp
+using GmRelay.DiscordBot.Features.Sessions;
+using GmRelay.DiscordBot.Infrastructure.Discord;
+using GmRelay.Shared.Platform;
+
+// ... existing usings ...
+
+builder.Services.AddSingleton<DiscordPermissionChecker>();
+builder.Services.AddSingleton<DiscordListSessionsHandler>();
+builder.Services.AddSingleton<DiscordNewSessionHandler>();
+builder.Services.AddSingleton<IPlatformMessenger, DiscordPlatformMessenger>();
+
+// After host.Build():
+host.AddSlashCommand("listsessions", "Show upcoming game sessions", async (DiscordListSessionsHandler handler, SlashCommandContext context) =>
+{
+    // NetCord module-based approach preferred; if AddSlashCommand lambda doesn't support DI injection of custom services,
+    // rely on module classes registered via AddApplicationCommands
+});
+```
+
+**Important:** NetCord module classes (`DiscordListSessionsCommand`, `DiscordNewSessionCommand`) автоматически регистрируются через `AddApplicationCommands()` + `AddGatewayHandlers(typeof(Program).Assembly)`. Constructor injection в модулях работает через DI контейнер. Никаких дополнительных `AddSlashCommand` для модулей не требуется.
+
+Убедиться, что в Program.cs есть:
+```csharp
+builder.Services.AddSingleton<DiscordPermissionChecker>();
+builder.Services.AddSingleton<DiscordListSessionsHandler>();
+builder.Services.AddSingleton<DiscordNewSessionHandler>();
+builder.Services.AddSingleton<IPlatformMessenger, DiscordPlatformMessenger>();
+```
+
+### Step 5.4: Run test — verify GREEN
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~DiscordStartupTests" --verbosity normal`
+Expected: PASS.
+
+### Step 5.5: Commit
+
+```bash
+git add src/GmRelay.DiscordBot/Program.cs tests/GmRelay.Bot.Tests/Discord/DiscordStartupTests.cs
+git commit -m "feat(discord): wire up DI registrations for session handlers and messenger
+
+Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>"
+```
+
+---
+
+## Task 6: Build Verification
+
+### Step 6.1: Build DiscordBot project
+
+Run: `dotnet build src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj --no-restore`
+Expected: Build succeeds (0 errors, 0 warnings).
+
+### Step 6.2: Run all tests
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --verbosity normal`
+Expected: All tests pass.
+
+### Step 6.3: Commit if any fixes needed
+
+If build or tests required fixes, commit them.
+
+---
+
+## Task 7: Version Bump
+
+**Files to modify:**
+- `Directory.Build.props`: `<Version>2.4.0</Version>`
+- `compose.yaml`: обновить теги `gmrelay-bot`, `gmrelay-web`, `gmrelay-discord-bot` → `2.4.0`
+- `.gitea/workflows/deploy.yml`: `VERSION: 2.4.0`
+- `src/GmRelay.Web/Components/Layout/NavMenu.razor`: `<div class="nav-version">v2.4.0</div>`
+
+### Step 7.1: Bump version
+
+Apply изменения ко всем 4 файлам.
+
+### Step 7.2: Update version test
+
+Modify `tests/GmRelay.Bot.Tests/Discord/DiscordProjectStructureTests.cs` — обновить `Version_ShouldBeSynchronizedForDiscordFeatureRelease` ожидаемое значение на `2.4.0`.
+
+### Step 7.3: Run version test
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~Version_ShouldBeSynchronizedForDiscordFeatureRelease" --verbosity normal`
+Expected: PASS.
+
+### Step 7.4: Commit
+
+```bash
+git add Directory.Build.props compose.yaml .gitea/workflows/deploy.yml src/GmRelay.Web/Components/Layout/NavMenu.razor tests/GmRelay.Bot.Tests/Discord/DiscordProjectStructureTests.cs
+git commit -m "chore: bump version to 2.4.0
+
+Synchronized across Directory.Build.props, compose.yaml, deploy.yml, NavMenu.razor
+
+Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>"
+```
+
+---
+
+## Spec Coverage Self-Review
+
+| Issue Requirement | Task |
+|---|---|
+| Slash command `/newsession` | Task 3 |
+| Slash command `/listsessions` | Task 2 |
+| Сохранение platform group identity (guild/channel) | Task 3 (game_groups.platform, external_group_id, external_channel_id) |
+| Минимальная проверка прав | Task 1 + Task 3 |
+| Данные пишутся в общую PostgreSQL без Telegram-only assumptions | Task 2, 3 SQL используют platform-agnostic колонки |
+| `/listsessions` публикует/обновляет расписание | Task 2 + Task 4 |
+
+**Placeholder scan:** Нет TBD, TODO, "implement later". Каждый шаг содержит конкретный код.
+
+**Type consistency:** `DiscordPermissionChecker.CanManageSchedule` перегружен для resolved permissions (ulong bitflag). Handler передает `Context.GuildUser.RoleIds` и `guild.OwnerId`.
+
+---
+
+## Execution Handoff
+
+**Plan complete and saved to `docs/superpowers/plans/2026-05-19-discord-newsession-listsessions.md`.**
+
+**Two execution options:**
+
+1. **Subagent-Driven (recommended)** — I dispatch a fresh subagent per task, review between tasks, fast iteration
+2. **Inline Execution** — Execute tasks in this session using executing-plans, batch execution with checkpoints for review
+
+**Which approach?**
@@ -1,5 +1,6 @@
 // ... UpdateRouter will have CancelSessionHandler and cancel_session route instead of close_recruitment
 using GmRelay.Shared.Domain;
+using GmRelay.Shared.Features.Sessions.CreateSession;
 using GmRelay.Shared.Rendering;
 using GmRelay.Bot.Features.Confirmation.HandleRsvp;
 using GmRelay.Bot.Features.Sessions.CreateSession;
@@ -10,6 +10,7 @@ using GmRelay.Bot.Infrastructure.Health;
 using GmRelay.Bot.Infrastructure.Logging;
 using GmRelay.Bot.Infrastructure.Scheduling;
 using GmRelay.Bot.Infrastructure.Telegram;
+using GmRelay.Shared.Features.Sessions.CreateSession;
 using GmRelay.Shared.Platform;
 using Npgsql;
 using Telegram.Bot;
@@ -63,6 +64,7 @@ builder.Services.AddSingleton<ISendJoinLinkHandler>(sp => sp.GetRequiredService<
 builder.Services.AddSingleton<SendOneHourReminderHandler>();
 builder.Services.AddSingleton<ISendOneHourReminderHandler>(sp => sp.GetRequiredService<SendOneHourReminderHandler>());
 builder.Services.AddSingleton<CreateSessionHandler>();
+builder.Services.AddSingleton<IScheduleMessageUpdateLock, ScheduleMessageUpdateLock>();
 builder.Services.AddSingleton<JoinSessionHandler>();
 builder.Services.AddSingleton<LeaveSessionHandler>();
 builder.Services.AddSingleton<PromoteWaitlistedPlayerHandler>();
@@ -661,7 +661,12 @@
        }
      },
      "gmrelay.shared": {
-        "type": "Project"
+        "type": "Project",
+        "dependencies": {
+          "Dapper": "[2.1.72, )",
+          "Microsoft.Extensions.Logging.Abstractions": "[10.0.5, )",
+          "Npgsql": "[10.0.2, )"
+        }
      }
    },
    "net10.0/win-x64": {
@@ -0,0 +1,38 @@
+using NetCord.Rest;
+using NetCord.Services.ApplicationCommands;
+
+namespace GmRelay.DiscordBot.Features.Sessions;
+
+[SlashCommand("listsessions", "Show upcoming game sessions in this server")]
+public class DiscordListSessionsCommand : ApplicationCommandModule<SlashCommandContext>
+{
+    private readonly DiscordListSessionsHandler _handler;
+
+    public DiscordListSessionsCommand(DiscordListSessionsHandler handler)
+    {
+        _handler = handler;
+    }
+
+    public async Task ExecuteAsync()
+    {
+        var guildId = Context.Guild?.Id.ToString()
+            ?? throw new InvalidOperationException("This command can only be used in a guild.");
+        var channelId = Context.Channel.Id.ToString();
+
+        var view = await _handler.BuildScheduleAsync(guildId, channelId, CancellationToken.None);
+
+        if (view is null)
+        {
+            await Context.Interaction.SendResponseAsync(
+                InteractionCallback.Message("📭 В этом сервере нет предстоящих игр."));
+            return;
+        }
+
+        var (embeds, actionRows) = Rendering.DiscordSessionBatchRenderer.Render(view);
+
+        await Context.Interaction.SendResponseAsync(
+            InteractionCallback.Message(new InteractionMessageProperties()
+                .WithEmbeds(embeds)
+                .WithComponents(actionRows)));
+    }
+}
@@ -0,0 +1,65 @@
+using Dapper;
+using GmRelay.Shared.Domain;
+using GmRelay.Shared.Rendering;
+using Npgsql;
+
+namespace GmRelay.DiscordBot.Features.Sessions;
+
+internal sealed record DiscordSessionListItemDto(
+    Guid Id, string Title, DateTime ScheduledAt, string Status, int? MaxPlayers,
+    int PlayerCount, int WaitlistCount);
+
+public sealed class DiscordListSessionsHandler(NpgsqlDataSource dataSource)
+{
+    public async Task<SessionBatchViewModel?> BuildScheduleAsync(
+        string guildId,
+        string channelId,
+        CancellationToken cancellationToken)
+    {
+        await using var connection = await dataSource.OpenConnectionAsync(cancellationToken);
+
+        var sessions = await connection.QueryAsync<DiscordSessionListItemDto>(
+            @"SELECT s.id as Id, s.title as Title, s.scheduled_at as ScheduledAt, s.status as Status,
+                     s.max_players as MaxPlayers,
+                     COUNT(sp.id) FILTER (WHERE sp.is_gm = false AND sp.registration_status = @Active) as PlayerCount,
+                     COUNT(sp.id) FILTER (WHERE sp.is_gm = false AND sp.registration_status = @Waitlisted) as WaitlistCount
+              FROM sessions s
+              JOIN game_groups g ON s.group_id = g.id
+              LEFT JOIN session_participants sp ON s.id = sp.session_id
+              WHERE g.platform = 'Discord'
+                AND g.external_group_id = @GuildId
+                AND s.status != @Cancelled
+                AND s.scheduled_at > NOW()
+              GROUP BY s.id, s.title, s.scheduled_at, s.status, s.max_players
+              ORDER BY s.scheduled_at ASC",
+            new
+            {
+                GuildId = guildId,
+                Cancelled = SessionStatus.Cancelled,
+                Active = ParticipantRegistrationStatus.Active,
+                Waitlisted = ParticipantRegistrationStatus.Waitlisted
+            });
+
+        var sessionList = sessions.ToList();
+        if (sessionList.Count == 0)
+            return null;
+
+        var sessionIds = sessionList.Select(s => s.Id).ToList();
+        var participants = await connection.QueryAsync<ParticipantBatchDto>(
+            @"SELECT sp.session_id as SessionId,
+                     p.display_name as DisplayName,
+                     COALESCE(p.external_username, p.telegram_username) as TelegramUsername,
+                     sp.registration_status as RegistrationStatus
+              FROM session_participants sp
+              JOIN players p ON p.id = sp.player_id
+              WHERE sp.session_id = ANY(@SessionIds) AND sp.is_gm = false
+              ORDER BY sp.registration_status ASC, sp.created_at ASC",
+            new { SessionIds = sessionIds });
+
+        var firstTitle = sessionList.First().Title;
+        var batchDtos = sessionList.Select(s => new SessionBatchDto(
+            s.Id, s.ScheduledAt, s.Status, s.MaxPlayers, "")).ToList();
+
+        return SessionBatchViewBuilder.Build(firstTitle, batchDtos, participants.ToList());
+    }
+}
@@ -0,0 +1,87 @@
+using GmRelay.DiscordBot.Rendering;
+using NetCord.Rest;
+using NetCord.Services.ApplicationCommands;
+
+namespace GmRelay.DiscordBot.Features.Sessions;
+
+[SlashCommand("newsession", "Create a new game session")]
+public class DiscordNewSessionCommand : ApplicationCommandModule<SlashCommandContext>
+{
+    private readonly DiscordNewSessionHandler _handler;
+    private readonly ILogger<DiscordNewSessionCommand> _logger;
+
+    public DiscordNewSessionCommand(DiscordNewSessionHandler handler, ILogger<DiscordNewSessionCommand> logger)
+    {
+        _handler = handler;
+        _logger = logger;
+    }
+
+    public async Task ExecuteAsync(
+        [SlashCommandParameter(Name = "title", Description = "Game title")] string title,
+        [SlashCommandParameter(Name = "time", Description = "Session time (YYYY-MM-DD HH:mm or DD.MM.YYYY HH:mm)")] string time,
+        [SlashCommandParameter(Name = "seats", Description = "Maximum number of players")] long? seats = null,
+        [SlashCommandParameter(Name = "link", Description = "Join link")] string? link = null)
+    {
+        var guild = Context.Guild
+            ?? throw new InvalidOperationException("This command can only be used in a guild.");
+
+        var timeResult = DiscordNewSessionHandler.ParseTimeInput(time);
+        if (!timeResult.IsSuccess)
+        {
+            await Context.Interaction.SendResponseAsync(
+                InteractionCallback.Message($"X {timeResult.Error}"));
+            return;
+        }
+
+        var resolvedPermissions = GetResolvedPermissions(guild, Context.User.Id);
+
+        try
+        {
+            var view = await _handler.HandleAsync(
+                guildId: guild.Id.ToString(),
+                channelId: Context.Channel.Id.ToString(),
+                userId: Context.User.Id,
+                userDisplayName: Context.User.GlobalName ?? Context.User.Username,
+                resolvedPermissions: resolvedPermissions,
+                guildOwnerId: guild.OwnerId,
+                title: title,
+                scheduledAt: timeResult.Value,
+                maxPlayers: seats is null ? null : (int)seats.Value,
+                joinLink: link,
+                CancellationToken.None);
+
+            var (embeds, actionRows) = DiscordSessionBatchRenderer.Render(view);
+            await Context.Interaction.SendResponseAsync(
+                InteractionCallback.Message(new InteractionMessageProperties()
+                    .WithContent(":white_check_mark: **Session created successfully!**")
+                    .WithEmbeds(embeds)
+                    .WithComponents(actionRows)));
+        }
+        catch (UnauthorizedAccessException ex)
+        {
+            await Context.Interaction.SendResponseAsync(
+                InteractionCallback.Message($":no_entry: {ex.Message}"));
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Failed to create session for user {UserId} in guild {GuildId}", Context.User.Id, guild.Id);
+            await Context.Interaction.SendResponseAsync(
+                InteractionCallback.Message(":boom: An error occurred while creating the session."));
+        }
+    }
+
+    private static ulong GetResolvedPermissions(NetCord.Gateway.Guild guild, ulong userId)
+    {
+        if (!guild.Users.TryGetValue(userId, out var guildUser))
+            return 0;
+
+        ulong resolved = 0;
+        foreach (var roleId in guildUser.RoleIds)
+        {
+            if (guild.Roles.TryGetValue(roleId, out var role))
+                resolved |= (ulong)role.Permissions;
+        }
+
+        return resolved;
+    }
+}
@@ -0,0 +1,148 @@
+using Dapper;
+using GmRelay.DiscordBot.Infrastructure.Discord;
+using GmRelay.Shared.Domain;
+using GmRelay.Shared.Platform;
+using GmRelay.Shared.Rendering;
+using Npgsql;
+
+namespace GmRelay.DiscordBot.Features.Sessions;
+
+public sealed record TimeParseResult(bool IsSuccess, DateTimeOffset Value, string? Error);
+
+public sealed class DiscordNewSessionHandler(
+    NpgsqlDataSource dataSource,
+    DiscordPermissionChecker permissionChecker,
+    IPlatformMessenger messenger,
+    ILogger<DiscordNewSessionHandler> logger)
+{
+    public static TimeParseResult ParseTimeInput(string input)
+    {
+        if (DateTimeOffset.TryParseExact(
+            input.Trim(),
+            "yyyy-MM-dd HH:mm",
+            System.Globalization.CultureInfo.InvariantCulture,
+            System.Globalization.DateTimeStyles.AssumeUniversal,
+            out var result))
+        {
+            if (result < DateTimeOffset.UtcNow)
+                return new TimeParseResult(false, default, "Дата находится в прошлом.");
+
+            return new TimeParseResult(true, result.ToUniversalTime(), null);
+        }
+
+        if (DateTimeOffset.TryParseExact(
+            input.Trim(),
+            "dd.MM.yyyy HH:mm",
+            System.Globalization.CultureInfo.InvariantCulture,
+            System.Globalization.DateTimeStyles.AssumeUniversal,
+            out var altResult))
+        {
+            if (altResult < DateTimeOffset.UtcNow)
+                return new TimeParseResult(false, default, "Дата находится в прошлом.");
+
+            return new TimeParseResult(true, altResult.ToUniversalTime(), null);
+        }
+
+        return new TimeParseResult(false, default, "Некорректный формат даты. Используйте YYYY-MM-DD HH:mm или DD.MM.YYYY HH:mm");
+    }
+
+    public async Task<SessionBatchViewModel> HandleAsync(
+        string guildId,
+        string channelId,
+        ulong userId,
+        string userDisplayName,
+        ulong resolvedPermissions,
+        ulong guildOwnerId,
+        string title,
+        DateTimeOffset scheduledAt,
+        int? maxPlayers,
+        string? joinLink,
+        CancellationToken cancellationToken)
+    {
+        await using var connection = await dataSource.OpenConnectionAsync(cancellationToken);
+
+        var dbManagerUserIds = await connection.QueryAsync<ulong>(
+            @"SELECT CAST(p.external_user_id AS BIGINT)
+              FROM group_managers gm
+              JOIN players p ON p.id = gm.player_id
+              JOIN game_groups g ON g.id = gm.group_id
+              WHERE g.platform = 'Discord' AND g.external_group_id = @GuildId",
+            new { GuildId = guildId });
+
+        if (!permissionChecker.CanManageSchedule(guildOwnerId, userId, dbManagerUserIds, resolvedPermissions))
+        {
+            throw new UnauthorizedAccessException("⛔ Только owner, администратор или manager могут создавать сессии.");
+        }
+
+        await using var transaction = await connection.BeginTransactionAsync(cancellationToken);
+        try
+        {
+            await connection.ExecuteAsync(
+                @"INSERT INTO players (display_name, platform, external_user_id, external_username)
+                  VALUES (@Name, 'Discord', @UserId, @Name)
+                  ON CONFLICT (platform, external_user_id)
+                  WHERE platform IS NOT NULL AND external_user_id IS NOT NULL
+                  DO UPDATE SET display_name = EXCLUDED.display_name,
+                                external_username = EXCLUDED.external_username",
+                new { Name = userDisplayName, UserId = userId.ToString() },
+                transaction);
+
+            var groupId = await connection.ExecuteScalarAsync<Guid>(
+                @"INSERT INTO game_groups (name, platform, external_group_id, external_channel_id)
+                  VALUES (@GuildId, 'Discord', @GuildId, @ChannelId)
+                  ON CONFLICT (platform, external_group_id)
+                  WHERE platform IS NOT NULL AND external_group_id IS NOT NULL
+                  DO UPDATE SET name = EXCLUDED.name,
+                                external_channel_id = COALESCE(EXCLUDED.external_channel_id, game_groups.external_channel_id)
+                  RETURNING id",
+                new { GuildId = guildId, ChannelId = channelId },
+                transaction);
+
+            await connection.ExecuteAsync(
+                @"INSERT INTO group_managers (group_id, player_id, role)
+                  SELECT @GroupId, p.id, @OwnerRole
+                  FROM players p
+                  WHERE p.platform = 'Discord' AND p.external_user_id = @UserId
+                  ON CONFLICT (group_id, player_id) DO NOTHING",
+                new { GroupId = groupId, UserId = userId.ToString(), OwnerRole = GroupManagerRoleExtensions.OwnerValue },
+                transaction);
+
+            var batchId = Guid.NewGuid();
+            var sessionId = await connection.ExecuteScalarAsync<Guid>(
+                @"INSERT INTO sessions (batch_id, group_id, title, join_link, scheduled_at, status, max_players)
+                  VALUES (@BatchId, @GroupId, @Title, @Link, @ScheduledAt, @Status, @MaxPlayers)
+                  RETURNING id",
+                new
+                {
+                    BatchId = batchId,
+                    GroupId = groupId,
+                    Title = title,
+                    Link = joinLink ?? string.Empty,
+                    ScheduledAt = scheduledAt.UtcDateTime,
+                    Status = SessionStatus.Planned,
+                    MaxPlayers = maxPlayers
+                },
+                transaction);
+
+            await transaction.CommitAsync(cancellationToken);
+            logger.LogInformation("Created session {SessionId} in guild {GuildId}", sessionId, guildId);
+
+            var sessions = new[] { new SessionBatchDto(sessionId, scheduledAt.UtcDateTime, SessionStatus.Planned, maxPlayers, joinLink ?? string.Empty) };
+            var view = SessionBatchViewBuilder.Build(title, sessions, Array.Empty<ParticipantBatchDto>());
+
+            await messenger.SendScheduleAsync(
+                new PlatformScheduleMessage(
+                    new PlatformGroup(PlatformKind.Discord, guildId, guildId, channelId),
+                    view,
+                    null),
+                cancellationToken);
+
+            return view;
+        }
+        catch
+        {
+            await transaction.RollbackAsync(cancellationToken);
+            throw;
+        }
+    }
+}
@@ -0,0 +1,64 @@
+using GmRelay.Shared.Features.Sessions.CreateSession;
+using GmRelay.Shared.Platform;
+
+namespace GmRelay.DiscordBot.Features.Sessions;
+
+public sealed record DiscordSessionInteractionInput(
+    Guid SessionId,
+    string InteractionId,
+    string GuildId,
+    string ChannelId,
+    string MessageId,
+    ulong UserId,
+    string Username,
+    string? DisplayName);
+
+public static class DiscordSessionInteractionMapper
+{
+    public static bool TryParseCustomId(string customId, string expectedAction, out Guid sessionId)
+    {
+        sessionId = default;
+
+        var parts = customId.Split(':', 2);
+        return parts.Length == 2
+            && string.Equals(parts[0], expectedAction, StringComparison.Ordinal)
+            && Guid.TryParse(parts[1], out sessionId);
+    }
+
+    public static JoinSessionCommand CreateJoinCommand(DiscordSessionInteractionInput input) =>
+        new(
+            SessionId: input.SessionId,
+            User: CreateUser(input),
+            InteractionId: input.InteractionId,
+            Group: CreateGroup(input),
+            ScheduleMessage: CreateMessageRef(input));
+
+    public static LeaveSessionCommand CreateLeaveCommand(DiscordSessionInteractionInput input) =>
+        new(
+            SessionId: input.SessionId,
+            User: CreateUser(input),
+            InteractionId: input.InteractionId,
+            Group: CreateGroup(input),
+            ScheduleMessage: CreateMessageRef(input));
+
+    private static PlatformUser CreateUser(DiscordSessionInteractionInput input) =>
+        new(
+            PlatformKind.Discord,
+            input.UserId.ToString(System.Globalization.CultureInfo.InvariantCulture),
+            string.IsNullOrWhiteSpace(input.DisplayName) ? input.Username : input.DisplayName,
+            input.Username);
+
+    private static PlatformGroup CreateGroup(DiscordSessionInteractionInput input) =>
+        new(
+            PlatformKind.Discord,
+            input.GuildId,
+            input.GuildId,
+            input.ChannelId);
+
+    private static PlatformMessageRef CreateMessageRef(DiscordSessionInteractionInput input) =>
+        new(
+            PlatformKind.Discord,
+            input.GuildId,
+            null,
+            input.MessageId);
+}
@@ -0,0 +1,101 @@
+using GmRelay.DiscordBot.Infrastructure.Discord;
+using GmRelay.Shared.Features.Sessions.CreateSession;
+using NetCord;
+using NetCord.Rest;
+using NetCord.Services.ComponentInteractions;
+
+namespace GmRelay.DiscordBot.Features.Sessions;
+
+public sealed class DiscordSessionInteractionModule(
+    JoinSessionHandler joinSessionHandler,
+    LeaveSessionHandler leaveSessionHandler,
+    DiscordInteractionReplyCache interactionReplies,
+    ILogger<DiscordSessionInteractionModule> logger) : ComponentInteractionModule<ButtonInteractionContext>
+{
+    [ComponentInteraction("join_session")]
+    public async Task JoinAsync(string sessionId)
+    {
+        if (!Guid.TryParse(sessionId, out var parsedSessionId))
+        {
+            await RespondAsync(CreateEphemeralReply("Session button is outdated."));
+            return;
+        }
+
+        var input = CreateInput(parsedSessionId);
+        await RespondAsync(InteractionCallback.DeferredMessage(MessageFlags.Ephemeral));
+        try
+        {
+            await joinSessionHandler.HandleAsync(
+                DiscordSessionInteractionMapper.CreateJoinCommand(input),
+                CancellationToken.None);
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Failed to handle Discord join interaction for session {SessionId}", parsedSessionId);
+            await CompleteResponseAsync("Не удалось обработать кнопку.");
+            return;
+        }
+
+        await CompleteWithStoredReplyAsync(input.InteractionId);
+    }
+
+    [ComponentInteraction("leave_session")]
+    public async Task LeaveAsync(string sessionId)
+    {
+        if (!Guid.TryParse(sessionId, out var parsedSessionId))
+        {
+            await RespondAsync(CreateEphemeralReply("Session button is outdated."));
+            return;
+        }
+
+        var input = CreateInput(parsedSessionId);
+        await RespondAsync(InteractionCallback.DeferredMessage(MessageFlags.Ephemeral));
+        try
+        {
+            await leaveSessionHandler.HandleAsync(
+                DiscordSessionInteractionMapper.CreateLeaveCommand(input),
+                CancellationToken.None);
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Failed to handle Discord leave interaction for session {SessionId}", parsedSessionId);
+            await CompleteResponseAsync("Не удалось обработать кнопку.");
+            return;
+        }
+
+        await CompleteWithStoredReplyAsync(input.InteractionId);
+    }
+
+    private DiscordSessionInteractionInput CreateInput(Guid sessionId)
+    {
+        var guild = Context.Guild
+            ?? throw new InvalidOperationException("Session buttons can only be used in a guild.");
+        var message = Context.Interaction.Message
+            ?? throw new InvalidOperationException("Session button interaction must include a message.");
+
+        return new DiscordSessionInteractionInput(
+            SessionId: sessionId,
+            InteractionId: Context.Interaction.Id.ToString(System.Globalization.CultureInfo.InvariantCulture),
+            GuildId: guild.Id.ToString(System.Globalization.CultureInfo.InvariantCulture),
+            ChannelId: Context.Channel.Id.ToString(System.Globalization.CultureInfo.InvariantCulture),
+            MessageId: message.Id.ToString(System.Globalization.CultureInfo.InvariantCulture),
+            UserId: Context.User.Id,
+            Username: Context.User.Username,
+            DisplayName: Context.User.GlobalName);
+    }
+
+    private async Task CompleteWithStoredReplyAsync(string interactionId)
+    {
+        var reply = interactionReplies.Take(interactionId);
+        await CompleteResponseAsync(reply?.Text ?? "Session updated.");
+    }
+
+    private Task CompleteResponseAsync(string text) =>
+        ModifyResponseAsync(options => options.Content = text);
+
+    private static InteractionCallbackProperties CreateEphemeralReply(string text) =>
+        InteractionCallback.Message(
+            new InteractionMessageProperties()
+                .WithContent(text)
+                .WithFlags(MessageFlags.Ephemeral));
+}
@@ -10,9 +10,11 @@

  <ItemGroup>
    <PackageReference Include="Aspire.Npgsql" Version="13.2.2" />
+    <PackageReference Include="Dapper" Version="2.1.72" />
    <PackageReference Include="Microsoft.Extensions.Hosting" Version="10.0.5" />
    <PackageReference Include="NetCord.Hosting" Version="1.0.0-alpha.489" />
    <PackageReference Include="NetCord.Hosting.Services" Version="1.0.0-alpha.489" />
+    <PackageReference Include="NetCord.Services" Version="1.0.0-alpha.489" />
    <PackageReference Include="Npgsql" Version="10.0.2" />
  </ItemGroup>

@@ -0,0 +1,17 @@
+using System.Collections.Concurrent;
+using GmRelay.Shared.Platform;
+
+namespace GmRelay.DiscordBot.Infrastructure.Discord;
+
+public sealed class DiscordInteractionReplyCache
+{
+    private readonly ConcurrentDictionary<string, PlatformInteractionReply> replies = new(StringComparer.Ordinal);
+
+    public void Store(PlatformInteractionReply reply) =>
+        replies[reply.InteractionId] = reply;
+
+    public PlatformInteractionReply? Take(string interactionId) =>
+        replies.TryRemove(interactionId, out var reply)
+            ? reply
+            : null;
+}
@@ -0,0 +1,22 @@
+namespace GmRelay.DiscordBot.Infrastructure.Discord;
+
+public sealed class DiscordPermissionChecker
+{
+    private const ulong AdministratorPermission = 0x8;
+
+    public bool CanManageSchedule(
+        ulong guildOwnerId,
+        ulong userId,
+        IEnumerable<ulong> dbManagerUserIds,
+        ulong resolvedPermissions)
+    {
+        if (userId == guildOwnerId)
+            return true;
+
+        if (dbManagerUserIds.Contains(userId))
+            return true;
+
+        return (resolvedPermissions & AdministratorPermission) == AdministratorPermission;
+    }
+}
+
@@ -0,0 +1,74 @@
+using GmRelay.DiscordBot.Rendering;
+using GmRelay.Shared.Platform;
+using GmRelay.Shared.Rendering;
+using NetCord;
+using NetCord.Rest;
+
+namespace GmRelay.DiscordBot.Infrastructure.Discord;
+
+public sealed class DiscordPlatformMessenger(
+    RestClient restClient,
+    DiscordInteractionReplyCache interactionReplies) : IPlatformMessenger
+{
+    public async Task<PlatformMessageRef> SendScheduleAsync(PlatformScheduleMessage message, CancellationToken ct)
+    {
+        var (embeds, actionRows) = DiscordSessionBatchRenderer.Render(message.View);
+
+        var channelId = ulong.Parse(message.Group.ExternalChannelId
+            ?? message.Group.ExternalGroupId);
+
+        var msg = await restClient.SendMessageAsync(
+            channelId,
+            new MessageProperties()
+                .WithEmbeds(embeds)
+                .WithComponents(actionRows));
+
+        return new PlatformMessageRef(
+            PlatformKind.Discord,
+            message.Group.ExternalGroupId,
+            null,
+            msg.Id.ToString());
+    }
+
+    public async Task UpdateScheduleAsync(PlatformScheduleMessage message, CancellationToken ct)
+    {
+        if (message.ExistingMessage is null)
+            return;
+
+        var (embeds, actionRows) = DiscordSessionBatchRenderer.Render(message.View);
+
+        var channelId = ulong.Parse(message.Group.ExternalChannelId
+            ?? message.Group.ExternalGroupId);
+        var messageId = ulong.Parse(message.ExistingMessage.ExternalMessageId);
+
+        await restClient.ModifyMessageAsync(
+            channelId,
+            messageId,
+            options =>
+            {
+                options.Embeds = embeds;
+                options.Components = actionRows;
+            });
+    }
+
+    public Task SendGroupMessageAsync(PlatformGroup group, string htmlText, CancellationToken ct)
+    {
+        return Task.CompletedTask;
+    }
+
+    public Task SendPrivateMessageAsync(PlatformPrivateMessage message, CancellationToken ct)
+    {
+        return Task.CompletedTask;
+    }
+
+    public Task AnswerInteractionAsync(PlatformInteractionReply reply, CancellationToken ct)
+    {
+        interactionReplies.Store(reply);
+        return Task.CompletedTask;
+    }
+
+    public Task SendCalendarFileAsync(PlatformCalendarFile file, CancellationToken ct)
+    {
+        return Task.CompletedTask;
+    }
+}
@@ -1,5 +1,9 @@
 using GmRelay.DiscordBot;
+using GmRelay.DiscordBot.Features.Sessions;
+using GmRelay.DiscordBot.Infrastructure.Discord;
 using GmRelay.DiscordBot.Infrastructure.Logging;
+using GmRelay.Shared.Features.Sessions.CreateSession;
+using GmRelay.Shared.Platform;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using NetCord;
@@ -37,6 +41,15 @@ builder.Services.AddSingleton<NpgsqlDataSource>(sp =>
    return NpgsqlDataSource.Create(connectionString);
 });

+builder.Services.AddSingleton<DiscordPermissionChecker>();
+builder.Services.AddSingleton<DiscordListSessionsHandler>();
+builder.Services.AddSingleton<DiscordNewSessionHandler>();
+builder.Services.AddSingleton<IScheduleMessageUpdateLock, ScheduleMessageUpdateLock>();
+builder.Services.AddSingleton<JoinSessionHandler>();
+builder.Services.AddSingleton<LeaveSessionHandler>();
+builder.Services.AddSingleton<DiscordInteractionReplyCache>();
+builder.Services.AddSingleton<IPlatformMessenger, DiscordPlatformMessenger>();
+
 builder.Services
    .AddDiscordGateway(options =>
    {
@@ -0,0 +1,125 @@
+using GmRelay.Shared.Domain;
+using GmRelay.Shared.Rendering;
+using NetCord;
+using NetCord.Rest;
+
+namespace GmRelay.DiscordBot.Rendering;
+
+public static class DiscordSessionBatchRenderer
+{
+    public static (IReadOnlyList<EmbedProperties> Embeds, IReadOnlyList<ActionRowProperties> ActionRows) Render(SessionBatchViewModel view)
+    {
+        var embeds = new List<EmbedProperties>();
+        var actionRows = new List<ActionRowProperties>();
+
+        foreach (var session in view.Sessions)
+        {
+            var embed = BuildEmbed(view.Title, session);
+            embeds.Add(embed);
+
+            if (session.AvailableActions.Count > 0)
+            {
+                var actionRow = new ActionRowProperties();
+                foreach (var action in session.AvailableActions)
+                {
+                    actionRow.Add(new ButtonProperties(
+                        $"{action.ActionKey}:{action.SessionId}",
+                        action.Label,
+                        ButtonStyle.Primary));
+                }
+                actionRows.Add(actionRow);
+            }
+        }
+
+        return (embeds, actionRows);
+    }
+
+    private static EmbedProperties BuildEmbed(string title, SessionViewItem session)
+    {
+        var embed = new EmbedProperties()
+            .WithTitle($"{title} — {session.ScheduledAt.FormatMoscow()}");
+
+        if (SessionStatus.IsCancelled(session.Status))
+        {
+            embed = embed.WithDescription("❌ Сессия отменена");
+        }
+        else
+        {
+            embed = embed.WithDescription(BuildPlayerDescription(session));
+        }
+
+        var fields = new List<EmbedFieldProperties>
+        {
+            new EmbedFieldProperties()
+                .WithName("👥 Заполненность")
+                .WithValue(session.MaxPlayers.HasValue
+                    ? $"{session.ActivePlayerCount}/{session.MaxPlayers.Value}"
+                    : $"{session.ActivePlayerCount}")
+                .WithInline(),
+
+            new EmbedFieldProperties()
+                .WithName("⏳ Лист ожидания")
+                .WithValue(session.WaitlistedPlayers.Count > 0
+                    ? session.WaitlistedPlayers.Count.ToString()
+                    : "—")
+                .WithInline(),
+
+            new EmbedFieldProperties()
+                .WithName("📊 Статус")
+                .WithValue(FormatStatus(session.Status))
+                .WithInline()
+        };
+
+        if (!string.IsNullOrEmpty(session.JoinLink))
+        {
+            embed = embed.WithUrl(session.JoinLink);
+        }
+
+        embed = embed.WithColor(GetColor(session));
+        embed = embed.AddFields(fields);
+
+        return embed;
+    }
+
+    private static string BuildPlayerDescription(SessionViewItem session)
+    {
+        if (session.ActivePlayers.Count == 0)
+            return "👥 Пока никто не записался";
+
+        var lines = session.ActivePlayers
+            .Select(p => $"• {p.DisplayName}")
+            .ToList();
+
+        if (session.WaitlistedPlayers.Count > 0)
+        {
+            lines.Add("");
+            lines.Add($"⏳ Лист ожидания ({session.WaitlistedPlayers.Count}):");
+            lines.AddRange(session.WaitlistedPlayers.Select(p => $"• {p.DisplayName}"));
+        }
+
+        return string.Join('\n', lines);
+    }
+
+    private static string FormatStatus(string status) => status switch
+    {
+        SessionStatus.Planned => "Запланирована",
+        SessionStatus.ConfirmationSent => "Ожидает подтверждения",
+        SessionStatus.Confirmed => "Подтверждена",
+        SessionStatus.Cancelled => "Отменена",
+        _ => status
+    };
+
+    private static Color GetColor(SessionViewItem session)
+    {
+        if (SessionStatus.IsCancelled(session.Status))
+            return new Color(0xED4245);
+
+        if (session.Status == SessionStatus.Confirmed)
+            return new Color(0x5865F2);
+
+        if (session.MaxPlayers.HasValue && session.ActivePlayerCount >= session.MaxPlayers.Value)
+            return new Color(0xFEE75C);
+
+        return new Color(0x57F287);
+    }
+}
@@ -22,6 +22,12 @@
          "OpenTelemetry.Extensions.Hosting": "1.15.0"
        }
      },
+      "Dapper": {
+        "type": "Direct",
+        "requested": "[2.1.72, )",
+        "resolved": "2.1.72",
+        "contentHash": "ns4mGqQd9a/MhP8m6w556vVlZIa0/MfUu03zrxjZC/jlr1uVCsUac8bkdB+Fs98Llbd56rRSo1eZH5VVmeGZyw=="
+      },
      "Microsoft.Extensions.Hosting": {
        "type": "Direct",
        "requested": "[10.0.5, )",
@@ -79,6 +85,15 @@
          "NetCord.Services": "1.0.0-alpha.489"
        }
      },
+      "NetCord.Services": {
+        "type": "Direct",
+        "requested": "[1.0.0-alpha.489, )",
+        "resolved": "1.0.0-alpha.489",
+        "contentHash": "SwG/7Khba1uRENDvG22RV/POByIwh/ZrenMrSzwoEcEYPMI5TabmEEB3ySH15XGdLcFZJEj106AlriN0kZhfFg==",
+        "dependencies": {
+          "NetCord": "1.0.0-alpha.489"
+        }
+      },
      "Npgsql": {
        "type": "Direct",
        "requested": "[10.0.2, )",
@@ -519,14 +534,6 @@
        "resolved": "1.0.0-alpha.489",
        "contentHash": "/rM73l1pwwJCWHi7YrIiSVc+GVL0lV+k+amqNJUMINjLO+c5bKWj9PoNNoMhiPZoaORO4k6Uxp8EQfoQj3AYtA=="
      },
-      "NetCord.Services": {
-        "type": "Transitive",
-        "resolved": "1.0.0-alpha.489",
-        "contentHash": "SwG/7Khba1uRENDvG22RV/POByIwh/ZrenMrSzwoEcEYPMI5TabmEEB3ySH15XGdLcFZJEj106AlriN0kZhfFg==",
-        "dependencies": {
-          "NetCord": "1.0.0-alpha.489"
-        }
-      },
      "Npgsql.DependencyInjection": {
        "type": "Transitive",
        "resolved": "10.0.1",
@@ -659,7 +666,12 @@
        }
      },
      "gmrelay.shared": {
-        "type": "Project"
+        "type": "Project",
+        "dependencies": {
+          "Dapper": "[2.1.72, )",
+          "Microsoft.Extensions.Logging.Abstractions": "[10.0.5, )",
+          "Npgsql": "[10.0.2, )"
+        }
      }
    }
  }
@@ -0,0 +1 @@
+[module: Dapper.DapperAot]
@@ -4,8 +4,9 @@ using Npgsql;
 using GmRelay.Shared.Domain;
 using GmRelay.Shared.Platform;
 using GmRelay.Shared.Rendering;
+using Microsoft.Extensions.Logging;

-namespace GmRelay.Bot.Features.Sessions.CreateSession;
+namespace GmRelay.Shared.Features.Sessions.CreateSession;

 public sealed record JoinSessionCommand(
    Guid SessionId,
@@ -15,15 +16,17 @@ public sealed record JoinSessionCommand(
    PlatformMessageRef ScheduleMessage);

 // DTOs for AOT compilation
-internal sealed record JoinSessionBatchDto(Guid BatchId, string Title, int? MaxPlayers);
+internal sealed record JoinSessionBatchDto(Guid BatchId, string Title, string Status, int? MaxPlayers);

 public sealed class JoinSessionHandler(
    NpgsqlDataSource dataSource,
    IPlatformMessenger messenger,
+    IScheduleMessageUpdateLock scheduleUpdateLock,
    ILogger<JoinSessionHandler> logger)
 {
    public async Task HandleAsync(JoinSessionCommand command, CancellationToken ct)
    {
+        await using var updateLock = await scheduleUpdateLock.AcquireAsync(command.ScheduleMessage, ct);
        await using var connection = await dataSource.OpenConnectionAsync(ct);
        await using var transaction = await connection.BeginTransactionAsync(ct);
        var transactionCommitted = false;
@@ -64,7 +67,7 @@ public sealed class JoinSessionHandler(

            // 2. Блокируем сессию на время расчета мест, чтобы параллельные нажатия не переполнили состав.
            var batchInfo = await connection.QuerySingleOrDefaultAsync<JoinSessionBatchDto>(
-                @"SELECT batch_id as BatchId, title as Title, max_players as MaxPlayers
+                @"SELECT batch_id as BatchId, title as Title, status as Status, max_players as MaxPlayers
                  FROM sessions
                  WHERE id = @SessionId
                  FOR UPDATE",
@@ -78,6 +81,13 @@ public sealed class JoinSessionHandler(
                return;
            }

+            if (SessionStatus.IsCancelled(batchInfo.Status))
+            {
+                await transaction.RollbackAsync(ct);
+                await AnswerAsync(command.InteractionId, "Сессия уже отменена.", ct);
+                return;
+            }
+
            var existingRegistrationStatus = await connection.ExecuteScalarAsync<string?>(
                """
                SELECT sp.registration_status
@@ -2,9 +2,10 @@ using Dapper;
 using GmRelay.Shared.Domain;
 using GmRelay.Shared.Platform;
 using GmRelay.Shared.Rendering;
+using Microsoft.Extensions.Logging;
 using Npgsql;

-namespace GmRelay.Bot.Features.Sessions.CreateSession;
+namespace GmRelay.Shared.Features.Sessions.CreateSession;

 public sealed record LeaveSessionCommand(
    Guid SessionId,
@@ -20,10 +21,12 @@ internal sealed record LeaveSessionPromotionDto(Guid ParticipantRowId, string Di
 public sealed class LeaveSessionHandler(
    NpgsqlDataSource dataSource,
    IPlatformMessenger messenger,
+    IScheduleMessageUpdateLock scheduleUpdateLock,
    ILogger<LeaveSessionHandler> logger)
 {
    public async Task HandleAsync(LeaveSessionCommand command, CancellationToken ct)
    {
+        await using var updateLock = await scheduleUpdateLock.AcquireAsync(command.ScheduleMessage, ct);
        await using var connection = await dataSource.OpenConnectionAsync(ct);
        await using var transaction = await connection.BeginTransactionAsync(ct);
        var transactionCommitted = false;
@@ -0,0 +1,39 @@
+using System.Collections.Concurrent;
+using GmRelay.Shared.Platform;
+
+namespace GmRelay.Shared.Features.Sessions.CreateSession;
+
+public interface IScheduleMessageUpdateLock
+{
+    ValueTask<IAsyncDisposable> AcquireAsync(PlatformMessageRef scheduleMessage, CancellationToken ct);
+}
+
+public sealed class ScheduleMessageUpdateLock : IScheduleMessageUpdateLock
+{
+    private readonly ConcurrentDictionary<string, SemaphoreSlim> locks = new(StringComparer.Ordinal);
+
+    public async ValueTask<IAsyncDisposable> AcquireAsync(PlatformMessageRef scheduleMessage, CancellationToken ct)
+    {
+        var key = CreateKey(scheduleMessage);
+        var semaphore = locks.GetOrAdd(key, _ => new SemaphoreSlim(1, 1));
+        await semaphore.WaitAsync(ct);
+        return new Releaser(semaphore);
+    }
+
+    private static string CreateKey(PlatformMessageRef scheduleMessage) =>
+        string.Join(
+            '\u001F',
+            scheduleMessage.Platform.ToString(),
+            scheduleMessage.ExternalGroupId,
+            scheduleMessage.ExternalThreadId ?? string.Empty,
+            scheduleMessage.ExternalMessageId);
+
+    private sealed class Releaser(SemaphoreSlim semaphore) : IAsyncDisposable
+    {
+        public ValueTask DisposeAsync()
+        {
+            semaphore.Release();
+            return ValueTask.CompletedTask;
+        }
+    }
+}
@@ -5,6 +5,14 @@
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
    <LangVersion>preview</LangVersion>
+    <InterceptorsPreviewNamespaces>$(InterceptorsPreviewNamespaces);Dapper.AOT</InterceptorsPreviewNamespaces>
  </PropertyGroup>

+  <ItemGroup>
+    <PackageReference Include="Dapper" Version="2.1.72" />
+    <PackageReference Include="Dapper.AOT" Version="1.0.48" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.5" />
+    <PackageReference Include="Npgsql" Version="10.0.2" />
+  </ItemGroup>
+
 </Project>
@@ -1,13 +0,0 @@
-namespace GmRelay.Shared.Rendering;
-
-/// <summary>
-/// Заглушка для Discord-рендерера.
-/// Реальная реализация будет добавлена в проект GmRelay.DiscordBot (issue #26).
-/// </summary>
-public static class DiscordSessionBatchRenderer
-{
-    public static object Render(SessionBatchViewModel view)
-    {
-        throw new NotImplementedException("Discord renderer will be implemented in issue #26.");
-    }
-}
@@ -2,11 +2,46 @@
  "version": 1,
  "dependencies": {
    "net10.0": {
+      "Dapper": {
+        "type": "Direct",
+        "requested": "[2.1.72, )",
+        "resolved": "2.1.72",
+        "contentHash": "ns4mGqQd9a/MhP8m6w556vVlZIa0/MfUu03zrxjZC/jlr1uVCsUac8bkdB+Fs98Llbd56rRSo1eZH5VVmeGZyw=="
+      },
+      "Dapper.AOT": {
+        "type": "Direct",
+        "requested": "[1.0.48, )",
+        "resolved": "1.0.48",
+        "contentHash": "rsLM3yKr4g+YKKox9lhc8D+kz67P7Q9+xdyn1LmCsoYr1kYpJSm+Nt6slo5UrfUrcTiGJ57zUlyO8XUdV7G7iA=="
+      },
+      "Microsoft.Extensions.Logging.Abstractions": {
+        "type": "Direct",
+        "requested": "[10.0.5, )",
+        "resolved": "10.0.5",
+        "contentHash": "9HOdqlDtPptVcmKAjsQ/Nr5Rxfq6FMYLdhvZh1lVmeKR738qeYecQD7+ldooXf+u2KzzR1kafSphWngIM3C6ug==",
+        "dependencies": {
+          "Microsoft.Extensions.DependencyInjection.Abstractions": "10.0.5"
+        }
+      },
+      "Npgsql": {
+        "type": "Direct",
+        "requested": "[10.0.2, )",
+        "resolved": "10.0.2",
+        "contentHash": "q5RfBI+wywJSFUNDE1L4ZbHEHCFTblo8Uf6A6oe4feOUFYiUQXyAf9GBh5qEZpvJaHiEbpBPkQumjEhXCJxdrg==",
+        "dependencies": {
+          "Microsoft.Extensions.Logging.Abstractions": "10.0.0"
+        }
+      },
      "SecurityCodeScan.VS2019": {
        "type": "Direct",
        "requested": "[5.6.7, )",
        "resolved": "5.6.7",
        "contentHash": "WIE9RJswdSc2j+rLz2gW6U+gMUjMHzY2j7C/CL8/R2olXNM/+twarfMnWqm+rZodDBvaYDApJyxM8mVYf9FGrQ=="
+      },
+      "Microsoft.Extensions.DependencyInjection.Abstractions": {
+        "type": "Transitive",
+        "resolved": "10.0.5",
+        "contentHash": "iVMtq9eRvzyhx8949EGT0OCYJfXi737SbRVzWXE5GrOgGj5AaZ9eUuxA/BSUfmOMALKn/g8KfFaNQw0eiB3lyA=="
      }
    }
  }
@@ -56,7 +56,7 @@
                    </button>
                </form>

-                <div class="nav-version">v2.2.0</div>
+                <div class="nav-version">v2.5.0</div>
            </div>
        </Authorized>
        <NotAuthorized>
@@ -243,7 +243,11 @@
        }
      },
      "gmrelay.shared": {
-        "type": "Project"
+        "type": "Project",
+        "dependencies": {
+          "Dapper": "[2.1.72, )",
+          "Npgsql": "[10.0.2, )"
+        }
      }
    }
  }
@@ -0,0 +1,69 @@
+using System.IO;
+
+namespace GmRelay.Bot.Tests.Discord;
+
+public sealed class DiscordListSessionsHandlerTests
+{
+    private static string GetRepoRoot()
+    {
+        var dir = AppContext.BaseDirectory;
+        while (!string.IsNullOrEmpty(dir) && !File.Exists(Path.Combine(dir, "Directory.Build.props")))
+        {
+            dir = Directory.GetParent(dir)?.FullName;
+        }
+
+        return dir ?? throw new InvalidOperationException("Could not find repo root");
+    }
+
+    [Fact]
+    public void Handler_ShouldExist()
+    {
+        var repoRoot = GetRepoRoot();
+        var handlerPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Features", "Sessions", "DiscordListSessionsHandler.cs");
+
+        Assert.True(File.Exists(handlerPath), "DiscordListSessionsHandler should exist.");
+    }
+
+    [Fact]
+    public void Handler_ShouldQueryByPlatformAndExternalGroupId()
+    {
+        var repoRoot = GetRepoRoot();
+        var handlerPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Features", "Sessions", "DiscordListSessionsHandler.cs");
+        var handler = File.ReadAllText(handlerPath);
+
+        Assert.Contains("platform = 'Discord'", handler, StringComparison.Ordinal);
+        Assert.Contains("external_group_id = @GuildId", handler, StringComparison.Ordinal);
+        Assert.Contains("scheduled_at > NOW()", handler, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public void Handler_ShouldNotContainTelegramSpecificColumns()
+    {
+        var repoRoot = GetRepoRoot();
+        var handlerPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Features", "Sessions", "DiscordListSessionsHandler.cs");
+        var handler = File.ReadAllText(handlerPath);
+
+        Assert.DoesNotContain("telegram_chat_id", handler, StringComparison.Ordinal);
+        Assert.DoesNotContain("telegram_id", handler, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public void Command_ShouldExist()
+    {
+        var repoRoot = GetRepoRoot();
+        var commandPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Features", "Sessions", "DiscordListSessionsCommand.cs");
+
+        Assert.True(File.Exists(commandPath), "DiscordListSessionsCommand should exist.");
+    }
+
+    [Fact]
+    public void Command_ShouldBeSlashCommandModule()
+    {
+        var repoRoot = GetRepoRoot();
+        var commandPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Features", "Sessions", "DiscordListSessionsCommand.cs");
+        var command = File.ReadAllText(commandPath);
+
+        Assert.Contains("SlashCommand", command, StringComparison.Ordinal);
+        Assert.Contains("listsessions", command, StringComparison.Ordinal);
+    }
+}
@@ -0,0 +1,144 @@
+using GmRelay.DiscordBot.Features.Sessions;
+
+namespace GmRelay.Bot.Tests.Discord;
+
+public sealed class DiscordNewSessionHandlerTests
+{
+    private static string GetRepoRoot()
+    {
+        var dir = AppContext.BaseDirectory;
+        while (!string.IsNullOrEmpty(dir) && !File.Exists(Path.Combine(dir, "Directory.Build.props")))
+        {
+            dir = Directory.GetParent(dir)?.FullName;
+        }
+
+        return dir ?? throw new InvalidOperationException("Could not find repo root");
+    }
+
+    // --- Runtime tests for ParseTimeInput (static, no DB) ---
+
+    [Fact]
+    public void ParseTimeInput_ShouldParseDiscordDateFormat()
+    {
+        var result = DiscordNewSessionHandler.ParseTimeInput("2026-05-20 19:30");
+        Assert.True(result.IsSuccess);
+        Assert.Equal(2026, result.Value.Year);
+        Assert.Equal(5, result.Value.Month);
+        Assert.Equal(20, result.Value.Day);
+        Assert.Equal(19, result.Value.Hour);
+        Assert.Equal(30, result.Value.Minute);
+    }
+
+    [Fact]
+    public void ParseTimeInput_ShouldRejectPastDate()
+    {
+        var result = DiscordNewSessionHandler.ParseTimeInput("2020-01-01 00:00");
+        Assert.False(result.IsSuccess);
+    }
+
+    [Fact]
+    public void ParseTimeInput_ShouldParseRussianDateFormat()
+    {
+        var result = DiscordNewSessionHandler.ParseTimeInput("20.05.2026 19:30");
+        Assert.True(result.IsSuccess);
+        Assert.Equal(2026, result.Value.Year);
+        Assert.Equal(5, result.Value.Month);
+        Assert.Equal(20, result.Value.Day);
+    }
+
+    [Fact]
+    public void ParseTimeInput_ShouldRejectInvalidFormat()
+    {
+        var result = DiscordNewSessionHandler.ParseTimeInput("not-a-date");
+        Assert.False(result.IsSuccess);
+        Assert.NotNull(result.Error);
+    }
+
+    // --- Source-level structural tests ---
+
+    [Fact]
+    public void Handler_ShouldExist()
+    {
+        var repoRoot = GetRepoRoot();
+        var handlerPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Features", "Sessions", "DiscordNewSessionHandler.cs");
+        Assert.True(File.Exists(handlerPath), "DiscordNewSessionHandler should exist.");
+    }
+
+    [Fact]
+    public void Handler_ShouldUseDapperForDatabaseAccess()
+    {
+        var repoRoot = GetRepoRoot();
+        var handlerPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Features", "Sessions", "DiscordNewSessionHandler.cs");
+        var source = File.ReadAllText(handlerPath);
+
+        Assert.Contains("QueryAsync", source, StringComparison.Ordinal);
+        Assert.Contains("ExecuteAsync", source, StringComparison.Ordinal);
+        Assert.Contains("ExecuteScalarAsync", source, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public void Handler_ShouldUseNpgsqlDataSource()
+    {
+        var repoRoot = GetRepoRoot();
+        var handlerPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Features", "Sessions", "DiscordNewSessionHandler.cs");
+        var source = File.ReadAllText(handlerPath);
+
+        Assert.Contains("NpgsqlDataSource", source, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public void Handler_ShouldCheckPermissionsViaPermissionChecker()
+    {
+        var repoRoot = GetRepoRoot();
+        var handlerPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Features", "Sessions", "DiscordNewSessionHandler.cs");
+        var source = File.ReadAllText(handlerPath);
+
+        Assert.Contains("CanManageSchedule", source, StringComparison.Ordinal);
+        Assert.Contains("UnauthorizedAccessException", source, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public void Handler_ShouldBePlatformNeutral()
+    {
+        var repoRoot = GetRepoRoot();
+        var handlerPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Features", "Sessions", "DiscordNewSessionHandler.cs");
+        var source = File.ReadAllText(handlerPath);
+
+        Assert.DoesNotContain("telegram_chat_id", source, StringComparison.Ordinal);
+        Assert.DoesNotContain("telegram_id", source, StringComparison.Ordinal);
+        Assert.Contains("platform = 'Discord'", source, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public void Handler_ShouldUseTransactions()
+    {
+        var repoRoot = GetRepoRoot();
+        var handlerPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Features", "Sessions", "DiscordNewSessionHandler.cs");
+        var source = File.ReadAllText(handlerPath);
+
+        Assert.Contains("BeginTransactionAsync", source, StringComparison.Ordinal);
+        Assert.Contains("CommitAsync", source, StringComparison.Ordinal);
+        Assert.Contains("RollbackAsync", source, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public void Handler_ShouldRespectCancellationToken()
+    {
+        var repoRoot = GetRepoRoot();
+        var handlerPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Features", "Sessions", "DiscordNewSessionHandler.cs");
+        var source = File.ReadAllText(handlerPath);
+
+        Assert.Contains("CancellationToken", source, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public void Command_ShouldRenderEmbedOnSuccess()
+    {
+        var repoRoot = GetRepoRoot();
+        var commandPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Features", "Sessions", "DiscordNewSessionCommand.cs");
+        var source = File.ReadAllText(commandPath);
+
+        Assert.Contains("DiscordSessionBatchRenderer.Render", source, StringComparison.Ordinal);
+        Assert.Contains("WithEmbeds", source, StringComparison.Ordinal);
+    }
+}
@@ -0,0 +1,72 @@
+using GmRelay.DiscordBot.Infrastructure.Discord;
+
+namespace GmRelay.Bot.Tests.Discord;
+
+public sealed class DiscordPermissionCheckerTests
+{
+    [Fact]
+    public void CanManageSchedule_WhenUserIsGuildOwner_ReturnsTrue()
+    {
+        var checker = new DiscordPermissionChecker();
+        var result = checker.CanManageSchedule(
+            guildOwnerId: 123456789ul,
+            userId: 123456789ul,
+            dbManagerUserIds: Array.Empty<ulong>(),
+            resolvedPermissions: 0);
+
+        Assert.True(result);
+    }
+
+    [Fact]
+    public void CanManageSchedule_WhenUserHasAdministratorPermission_ReturnsTrue()
+    {
+        var checker = new DiscordPermissionChecker();
+        var result = checker.CanManageSchedule(
+            guildOwnerId: 123456789ul,
+            userId: 987654321ul,
+            dbManagerUserIds: Array.Empty<ulong>(),
+            resolvedPermissions: 0x8); // Administrator
+
+        Assert.True(result);
+    }
+
+    [Fact]
+    public void CanManageSchedule_WhenUserIsDbManager_ReturnsTrue()
+    {
+        var checker = new DiscordPermissionChecker();
+        var managerId = 555ul;
+        var result = checker.CanManageSchedule(
+            guildOwnerId: 123456789ul,
+            userId: managerId,
+            dbManagerUserIds: new[] { managerId },
+            resolvedPermissions: 0);
+
+        Assert.True(result);
+    }
+
+    [Fact]
+    public void CanManageSchedule_WhenRegularUser_ReturnsFalse()
+    {
+        var checker = new DiscordPermissionChecker();
+        var result = checker.CanManageSchedule(
+            guildOwnerId: 123456789ul,
+            userId: 111ul,
+            dbManagerUserIds: new[] { 222ul },
+            resolvedPermissions: 0);
+
+        Assert.False(result);
+    }
+
+    [Fact]
+    public void CanManageSchedule_WhenUserHasOtherPermissionButNotAdmin_ReturnsFalse()
+    {
+        var checker = new DiscordPermissionChecker();
+        var result = checker.CanManageSchedule(
+            guildOwnerId: 123456789ul,
+            userId: 111ul,
+            dbManagerUserIds: Array.Empty<ulong>(),
+            resolvedPermissions: 0x4); // ManageServer, not Administrator
+
+        Assert.False(result);
+    }
+}
@@ -0,0 +1,51 @@
+using GmRelay.DiscordBot.Infrastructure.Discord;
+using GmRelay.Shared.Platform;
+using GmRelay.Shared.Rendering;
+
+namespace GmRelay.Bot.Tests.Discord;
+
+public sealed class DiscordPlatformMessengerTests
+{
+    [Fact]
+    public void Constructor_ShouldAcceptRestClientAndReplyCache()
+    {
+        var constructor = typeof(DiscordPlatformMessenger).GetConstructor(new[]
+        {
+            typeof(NetCord.Rest.RestClient),
+            typeof(DiscordInteractionReplyCache)
+        });
+        Assert.NotNull(constructor);
+    }
+
+    [Fact]
+    public void DiscordPlatformMessenger_ShouldImplementIPlatformMessenger()
+    {
+        Assert.True(typeof(IPlatformMessenger).IsAssignableFrom(typeof(DiscordPlatformMessenger)));
+    }
+
+    [Fact]
+    public async Task AnswerInteractionAsync_ShouldStoreReplyForComponentModule()
+    {
+        var source = await ReadRepositoryFileAsync("src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPlatformMessenger.cs");
+
+        Assert.Contains("DiscordInteractionReplyCache", source, StringComparison.Ordinal);
+        Assert.Contains("interactionReplies.Store(reply)", source, StringComparison.Ordinal);
+    }
+
+    private static async Task<string> ReadRepositoryFileAsync(string relativePath)
+    {
+        var directory = new DirectoryInfo(AppContext.BaseDirectory);
+        while (directory is not null)
+        {
+            var candidate = Path.Combine(directory.FullName, relativePath);
+            if (File.Exists(candidate))
+            {
+                return await File.ReadAllTextAsync(candidate);
+            }
+
+            directory = directory.Parent;
+        }
+
+        throw new FileNotFoundException($"Could not locate repository file '{relativePath}'.");
+    }
+}
@@ -61,7 +61,7 @@ public sealed class DiscordProjectStructureTests
        var prChecks = File.ReadAllText(Path.Combine(repoRoot, ".gitea", "workflows", "pr-checks.yml"));
        var deploy = File.ReadAllText(Path.Combine(repoRoot, ".gitea", "workflows", "deploy.yml"));

-        Assert.Contains("gmrelay-discord-bot:2.2.0", compose);
+        Assert.Contains("gmrelay-discord-bot:2.5.0", compose);
        Assert.Contains("Discord__Token=${DISCORD_BOT_TOKEN:?Set DISCORD_BOT_TOKEN in .env}", compose);
        Assert.Contains("src/GmRelay.DiscordBot/Dockerfile", deploy);
        Assert.Contains("DISCORD_BOT_TOKEN", deploy);
@@ -75,13 +75,13 @@ public sealed class DiscordProjectStructureTests
    {
        var repoRoot = GetRepoRoot();

-        Assert.Contains("<Version>2.2.0</Version>", File.ReadAllText(Path.Combine(repoRoot, "Directory.Build.props")));
-        Assert.Contains("VERSION: 2.2.0", File.ReadAllText(Path.Combine(repoRoot, ".gitea", "workflows", "deploy.yml")));
-        Assert.Contains("gmrelay-bot:2.2.0", File.ReadAllText(Path.Combine(repoRoot, "compose.yaml")));
-        Assert.Contains("gmrelay-web:2.2.0", File.ReadAllText(Path.Combine(repoRoot, "compose.yaml")));
-        Assert.Contains("gmrelay-discord-bot:2.2.0", File.ReadAllText(Path.Combine(repoRoot, "compose.yaml")));
+        Assert.Contains("<Version>2.5.0</Version>", File.ReadAllText(Path.Combine(repoRoot, "Directory.Build.props")));
+        Assert.Contains("VERSION: 2.5.0", File.ReadAllText(Path.Combine(repoRoot, ".gitea", "workflows", "deploy.yml")));
+        Assert.Contains("gmrelay-bot:2.5.0", File.ReadAllText(Path.Combine(repoRoot, "compose.yaml")));
+        Assert.Contains("gmrelay-web:2.5.0", File.ReadAllText(Path.Combine(repoRoot, "compose.yaml")));
+        Assert.Contains("gmrelay-discord-bot:2.5.0", File.ReadAllText(Path.Combine(repoRoot, "compose.yaml")));
        Assert.Contains(
-            "v2.2.0",
+            "v2.5.0",
            File.ReadAllText(Path.Combine(repoRoot, "src", "GmRelay.Web", "Components", "Layout", "NavMenu.razor")));
    }
 }
@@ -0,0 +1,96 @@
+using GmRelay.DiscordBot.Features.Sessions;
+using GmRelay.Shared.Features.Sessions.CreateSession;
+using GmRelay.Shared.Platform;
+
+namespace GmRelay.Bot.Tests.Discord;
+
+public sealed class DiscordSessionInteractionMapperTests
+{
+    [Fact]
+    public void TryParseCustomId_WhenActionAndSessionIdMatch_ReturnsSessionId()
+    {
+        var sessionId = Guid.NewGuid();
+
+        var result = DiscordSessionInteractionMapper.TryParseCustomId(
+            $"join_session:{sessionId}",
+            "join_session",
+            out var parsedSessionId);
+
+        Assert.True(result);
+        Assert.Equal(sessionId, parsedSessionId);
+    }
+
+    [Fact]
+    public void TryParseCustomId_WhenActionDoesNotMatch_ReturnsFalse()
+    {
+        var result = DiscordSessionInteractionMapper.TryParseCustomId(
+            $"leave_session:{Guid.NewGuid()}",
+            "join_session",
+            out _);
+
+        Assert.False(result);
+    }
+
+    [Fact]
+    public void TryParseCustomId_WhenSessionIdIsInvalid_ReturnsFalse()
+    {
+        var result = DiscordSessionInteractionMapper.TryParseCustomId(
+            "join_session:not-a-guid",
+            "join_session",
+            out _);
+
+        Assert.False(result);
+    }
+
+    [Fact]
+    public void CreateJoinCommand_ShouldBuildPlatformNeutralDiscordCommand()
+    {
+        var sessionId = Guid.NewGuid();
+        var input = CreateInput(sessionId, displayName: "Alice GM");
+
+        JoinSessionCommand command = DiscordSessionInteractionMapper.CreateJoinCommand(input);
+
+        Assert.Equal(sessionId, command.SessionId);
+        Assert.Equal("interaction-1", command.InteractionId);
+        Assert.Equal(PlatformKind.Discord, command.User.Platform);
+        Assert.Equal("42", command.User.ExternalUserId);
+        Assert.Equal("Alice GM", command.User.DisplayName);
+        Assert.Equal("alice", command.User.ExternalUsername);
+        Assert.Equal(PlatformKind.Discord, command.Group.Platform);
+        Assert.Equal("guild-1", command.Group.ExternalGroupId);
+        Assert.Equal("channel-1", command.Group.ExternalChannelId);
+        Assert.Equal(PlatformKind.Discord, command.ScheduleMessage.Platform);
+        Assert.Equal("guild-1", command.ScheduleMessage.ExternalGroupId);
+        Assert.Equal("message-1", command.ScheduleMessage.ExternalMessageId);
+    }
+
+    [Fact]
+    public void CreateLeaveCommand_ShouldBuildPlatformNeutralDiscordCommand()
+    {
+        var sessionId = Guid.NewGuid();
+        var input = CreateInput(sessionId, displayName: null);
+
+        LeaveSessionCommand command = DiscordSessionInteractionMapper.CreateLeaveCommand(input);
+
+        Assert.Equal(sessionId, command.SessionId);
+        Assert.Equal("interaction-1", command.InteractionId);
+        Assert.Equal(PlatformKind.Discord, command.User.Platform);
+        Assert.Equal("42", command.User.ExternalUserId);
+        Assert.Equal("alice", command.User.DisplayName);
+        Assert.Equal("alice", command.User.ExternalUsername);
+        Assert.Equal("guild-1", command.Group.ExternalGroupId);
+        Assert.Equal("channel-1", command.Group.ExternalChannelId);
+        Assert.Equal("message-1", command.ScheduleMessage.ExternalMessageId);
+    }
+
+    private static DiscordSessionInteractionInput CreateInput(Guid sessionId, string? displayName)
+        => new(
+            SessionId: sessionId,
+            InteractionId: "interaction-1",
+            GuildId: "guild-1",
+            ChannelId: "channel-1",
+            MessageId: "message-1",
+            UserId: 42,
+            Username: "alice",
+            DisplayName: displayName);
+}
@@ -0,0 +1,40 @@
+namespace GmRelay.Bot.Tests.Discord;
+
+public sealed class DiscordSessionInteractionModuleSourceTests
+{
+    [Fact]
+    public async Task Module_ShouldRouteJoinAndLeaveButtonsToNeutralHandlers()
+    {
+        var source = await ReadRepositoryFileAsync("src/GmRelay.DiscordBot/Features/Sessions/DiscordSessionInteractionModule.cs");
+
+        Assert.Contains("ComponentInteractionModule<ButtonInteractionContext>", source, StringComparison.Ordinal);
+        Assert.Contains("[ComponentInteraction(\"join_session\")]", source, StringComparison.Ordinal);
+        Assert.Contains("[ComponentInteraction(\"leave_session\")]", source, StringComparison.Ordinal);
+        Assert.Contains("JoinSessionHandler", source, StringComparison.Ordinal);
+        Assert.Contains("LeaveSessionHandler", source, StringComparison.Ordinal);
+        Assert.Contains("DiscordSessionInteractionMapper.CreateJoinCommand", source, StringComparison.Ordinal);
+        Assert.Contains("DiscordSessionInteractionMapper.CreateLeaveCommand", source, StringComparison.Ordinal);
+        Assert.Contains("RespondAsync", source, StringComparison.Ordinal);
+        Assert.Contains("InteractionCallback.DeferredMessage(MessageFlags.Ephemeral)", source, StringComparison.Ordinal);
+        Assert.Contains("ModifyResponseAsync", source, StringComparison.Ordinal);
+        Assert.Contains("Не удалось обработать кнопку.", source, StringComparison.Ordinal);
+        Assert.Contains("MessageFlags.Ephemeral", source, StringComparison.Ordinal);
+    }
+
+    private static async Task<string> ReadRepositoryFileAsync(string relativePath)
+    {
+        var directory = new DirectoryInfo(AppContext.BaseDirectory);
+        while (directory is not null)
+        {
+            var candidate = Path.Combine(directory.FullName, relativePath);
+            if (File.Exists(candidate))
+            {
+                return await File.ReadAllTextAsync(candidate);
+            }
+
+            directory = directory.Parent;
+        }
+
+        throw new FileNotFoundException($"Could not locate repository file '{relativePath}'.");
+    }
+}
@@ -71,6 +71,19 @@ public sealed class DiscordStartupTests
        Assert.DoesNotContain("Token", logger);
    }

+    [Fact]
+    public void Program_ShouldRegisterDiscordSessionHandlers()
+    {
+        var program = ReadProgram();
+        Assert.Contains("DiscordListSessionsHandler", program);
+        Assert.Contains("DiscordNewSessionHandler", program);
+        Assert.Contains("JoinSessionHandler", program);
+        Assert.Contains("LeaveSessionHandler", program);
+        Assert.Contains("DiscordPermissionChecker", program);
+        Assert.Contains("DiscordPlatformMessenger", program);
+        Assert.Contains("IPlatformMessenger", program);
+    }
+
    private static string ReadProgram()
    {
        var repoRoot = GetRepoRoot();
@@ -1,4 +1,4 @@
-using GmRelay.Bot.Features.Sessions.CreateSession;
+using GmRelay.Shared.Features.Sessions.CreateSession;
 using GmRelay.Shared.Platform;

 namespace GmRelay.Bot.Tests.Features.Sessions.CreateSession;
@@ -5,7 +5,7 @@ public sealed class PlatformNeutralSessionInteractionSqlTests
    [Fact]
    public async Task JoinSessionHandler_ShouldPersistPlayersByPlatformIdentity()
    {
-        var handler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Sessions/CreateSession/JoinSessionHandler.cs");
+        var handler = await ReadRepositoryFileAsync("src/GmRelay.Shared/Features/Sessions/CreateSession/JoinSessionHandler.cs");

        Assert.Contains("platform, external_user_id", handler, StringComparison.Ordinal);
        Assert.Contains("ON CONFLICT (platform, external_user_id)", handler, StringComparison.Ordinal);
@@ -16,10 +16,20 @@ public sealed class PlatformNeutralSessionInteractionSqlTests
        Assert.DoesNotContain("command.TelegramUsername", handler, StringComparison.Ordinal);
    }

+    [Fact]
+    public async Task JoinSessionHandler_ShouldRejectCancelledSessionsBeforeInsert()
+    {
+        var handler = await ReadRepositoryFileAsync("src/GmRelay.Shared/Features/Sessions/CreateSession/JoinSessionHandler.cs");
+
+        Assert.Contains("Status", handler, StringComparison.Ordinal);
+        Assert.Contains("SessionStatus.IsCancelled(batchInfo.Status)", handler, StringComparison.Ordinal);
+        Assert.Contains("Сессия уже отменена.", handler, StringComparison.Ordinal);
+    }
+
    [Fact]
    public async Task LeaveSessionHandler_ShouldFindParticipantsByPlatformIdentity()
    {
-        var handler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Sessions/CreateSession/LeaveSessionHandler.cs");
+        var handler = await ReadRepositoryFileAsync("src/GmRelay.Shared/Features/Sessions/CreateSession/LeaveSessionHandler.cs");

        Assert.Contains("p.platform = @Platform", handler, StringComparison.Ordinal);
        Assert.Contains("p.external_user_id = @ExternalUserId", handler, StringComparison.Ordinal);
@@ -31,8 +41,8 @@ public sealed class PlatformNeutralSessionInteractionSqlTests
    [Fact]
    public async Task SessionInteractionHandlers_ShouldUpdateSchedulesThroughCommandMessageReference()
    {
-        var joinHandler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Sessions/CreateSession/JoinSessionHandler.cs");
-        var leaveHandler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Sessions/CreateSession/LeaveSessionHandler.cs");
+        var joinHandler = await ReadRepositoryFileAsync("src/GmRelay.Shared/Features/Sessions/CreateSession/JoinSessionHandler.cs");
+        var leaveHandler = await ReadRepositoryFileAsync("src/GmRelay.Shared/Features/Sessions/CreateSession/LeaveSessionHandler.cs");

        Assert.Contains("new PlatformScheduleMessage(", joinHandler, StringComparison.Ordinal);
        Assert.Contains("command.Group", joinHandler, StringComparison.Ordinal);
@@ -42,6 +52,16 @@ public sealed class PlatformNeutralSessionInteractionSqlTests
        Assert.Contains("command.ScheduleMessage", leaveHandler, StringComparison.Ordinal);
    }

+    [Fact]
+    public async Task SessionInteractionHandlers_ShouldSerializeScheduleMessageUpdates()
+    {
+        var joinHandler = await ReadRepositoryFileAsync("src/GmRelay.Shared/Features/Sessions/CreateSession/JoinSessionHandler.cs");
+        var leaveHandler = await ReadRepositoryFileAsync("src/GmRelay.Shared/Features/Sessions/CreateSession/LeaveSessionHandler.cs");
+
+        Assert.Contains("scheduleUpdateLock.AcquireAsync(command.ScheduleMessage", joinHandler, StringComparison.Ordinal);
+        Assert.Contains("scheduleUpdateLock.AcquireAsync(command.ScheduleMessage", leaveHandler, StringComparison.Ordinal);
+    }
+
    private static async Task<string> ReadRepositoryFileAsync(string relativePath)
    {
        var directory = new DirectoryInfo(AppContext.BaseDirectory);
@@ -0,0 +1,66 @@
+using System.Xml.Linq;
+
+namespace GmRelay.Bot.Tests.Features.Sessions.CreateSession;
+
+public sealed class SharedDapperAotConfigurationTests
+{
+    [Fact]
+    public void SharedProject_ShouldEnableDapperAotForSessionInteractionHandlers()
+    {
+        var repoRoot = FindRepositoryRoot();
+        var sharedProjectPath = Path.Combine(repoRoot, "src", "GmRelay.Shared", "GmRelay.Shared.csproj");
+        var joinHandler = File.ReadAllText(Path.Combine(
+            repoRoot,
+            "src",
+            "GmRelay.Shared",
+            "Features",
+            "Sessions",
+            "CreateSession",
+            "JoinSessionHandler.cs"));
+        var leaveHandler = File.ReadAllText(Path.Combine(
+            repoRoot,
+            "src",
+            "GmRelay.Shared",
+            "Features",
+            "Sessions",
+            "CreateSession",
+            "LeaveSessionHandler.cs"));
+
+        Assert.Contains("using Dapper;", joinHandler, StringComparison.Ordinal);
+        Assert.Contains("using Dapper;", leaveHandler, StringComparison.Ordinal);
+
+        var project = XDocument.Load(sharedProjectPath);
+        var packageReferences = project
+            .Descendants("PackageReference")
+            .Select(reference => reference.Attribute("Include")?.Value)
+            .ToArray();
+        var interceptorNamespaces = project
+            .Descendants("InterceptorsPreviewNamespaces")
+            .Select(element => element.Value)
+            .ToArray();
+        var moduleAttributeFiles = Directory
+            .EnumerateFiles(Path.GetDirectoryName(sharedProjectPath)!, "*.cs", SearchOption.AllDirectories)
+            .Select(File.ReadAllText)
+            .ToArray();
+
+        Assert.Contains("Dapper.AOT", packageReferences);
+        Assert.Contains(interceptorNamespaces, value => value.Contains("Dapper.AOT", StringComparison.Ordinal));
+        Assert.Contains(moduleAttributeFiles, source => source.Contains("[module: Dapper.DapperAot]", StringComparison.Ordinal));
+    }
+
+    private static string FindRepositoryRoot()
+    {
+        var directory = new DirectoryInfo(AppContext.BaseDirectory);
+        while (directory is not null)
+        {
+            if (File.Exists(Path.Combine(directory.FullName, "Directory.Build.props")))
+            {
+                return directory.FullName;
+            }
+
+            directory = directory.Parent;
+        }
+
+        throw new InvalidOperationException("Could not locate repository root.");
+    }
+}
@@ -74,7 +74,7 @@ public sealed class PlatformIdentityMigrationTests
    [Fact]
    public async Task JoinSessionHandler_ShouldDualWritePlatformIdentity()
    {
-        var handler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Sessions/CreateSession/JoinSessionHandler.cs");
+        var handler = await ReadRepositoryFileAsync("src/GmRelay.Shared/Features/Sessions/CreateSession/JoinSessionHandler.cs");

        Assert.Contains("external_user_id", handler, StringComparison.Ordinal);
        Assert.Contains("external_username", handler, StringComparison.Ordinal);
@@ -12,8 +12,8 @@ public sealed class TelegramPlatformMessengerSourceTests
    }

    [Theory]
-    [InlineData("src/GmRelay.Bot/Features/Sessions/CreateSession/JoinSessionHandler.cs")]
-    [InlineData("src/GmRelay.Bot/Features/Sessions/CreateSession/LeaveSessionHandler.cs")]
+    [InlineData("src/GmRelay.Shared/Features/Sessions/CreateSession/JoinSessionHandler.cs")]
+    [InlineData("src/GmRelay.Shared/Features/Sessions/CreateSession/LeaveSessionHandler.cs")]
    [InlineData("src/GmRelay.Bot/Features/Sessions/CreateSession/CancelSessionHandler.cs")]
    [InlineData("src/GmRelay.Bot/Features/Sessions/CreateSession/PromoteWaitlistedPlayerHandler.cs")]
    [InlineData("src/GmRelay.Bot/Features/Sessions/RescheduleSession/InitiateRescheduleHandler.cs")]
@@ -0,0 +1,41 @@
+using GmRelay.Shared.Features.Sessions.CreateSession;
+using GmRelay.Shared.Platform;
+
+namespace GmRelay.Bot.Tests.Platform;
+
+public sealed class ScheduleMessageUpdateLockTests
+{
+    [Fact]
+    public async Task AcquireAsync_ShouldSerializeSameScheduleMessage()
+    {
+        var updateLock = new ScheduleMessageUpdateLock();
+        var message = CreateMessage("message-1");
+
+        var first = await updateLock.AcquireAsync(message, CancellationToken.None);
+        var secondTask = updateLock.AcquireAsync(message, CancellationToken.None).AsTask();
+
+        Assert.False(secondTask.IsCompleted);
+
+        await first.DisposeAsync();
+        var second = await secondTask.WaitAsync(TimeSpan.FromSeconds(1));
+        await second.DisposeAsync();
+    }
+
+    [Fact]
+    public async Task AcquireAsync_ShouldNotBlockDifferentScheduleMessages()
+    {
+        var updateLock = new ScheduleMessageUpdateLock();
+
+        var first = await updateLock.AcquireAsync(CreateMessage("message-1"), CancellationToken.None);
+        var secondTask = updateLock.AcquireAsync(CreateMessage("message-2"), CancellationToken.None).AsTask();
+
+        Assert.True(secondTask.IsCompleted);
+
+        await first.DisposeAsync();
+        var second = await secondTask;
+        await second.DisposeAsync();
+    }
+
+    private static PlatformMessageRef CreateMessage(string messageId) =>
+        new(PlatformKind.Discord, "guild-1", null, messageId);
+}
@@ -0,0 +1,139 @@
+using GmRelay.DiscordBot.Rendering;
+using GmRelay.Shared.Domain;
+using GmRelay.Shared.Rendering;
+using NetCord;
+using NetCord.Rest;
+
+namespace GmRelay.Bot.Tests.Rendering;
+
+public sealed class DiscordSessionBatchRendererTests
+{
+    [Fact]
+    public void Render_ShouldProduceEmbedsAndButtonsForMultipleSessions()
+    {
+        var firstSessionId = Guid.NewGuid();
+        var secondSessionId = Guid.NewGuid();
+        var cancelledSessionId = Guid.NewGuid();
+
+        var sessions = new[]
+        {
+            new SessionBatchDto(secondSessionId, new DateTime(2026, 4, 27, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Planned, 4, "https://example.com/game2"),
+            new SessionBatchDto(cancelledSessionId, new DateTime(2026, 4, 28, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Cancelled, null, ""),
+            new SessionBatchDto(firstSessionId, new DateTime(2026, 4, 26, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Planned, 2, "https://example.com/game1")
+        };
+        var participants = new[]
+        {
+            new ParticipantBatchDto(secondSessionId, "Alice", "alice", ParticipantRegistrationStatus.Active),
+            new ParticipantBatchDto(secondSessionId, "Charlie", null, ParticipantRegistrationStatus.Waitlisted),
+            new ParticipantBatchDto(cancelledSessionId, "Bob", null, ParticipantRegistrationStatus.Active)
+        };
+
+        var view = SessionBatchViewBuilder.Build("Campaign", sessions, participants);
+        var (embeds, actionRows) = DiscordSessionBatchRenderer.Render(view);
+
+        Assert.Equal(3, embeds.Count);
+        Assert.Equal(2, actionRows.Count); // cancelled skipped
+
+        // Embed titles contain game title and Moscow date
+        Assert.Contains(embeds, e => e.Title!.Contains("Campaign") && e.Title.Contains("26"));
+        Assert.Contains(embeds, e => e.Title!.Contains("Campaign") && e.Title.Contains("27"));
+        Assert.Contains(embeds, e => e.Title!.Contains("Campaign") && e.Title.Contains("28"));
+
+        // Cancelled session embed description indicates cancellation
+        var cancelledEmbed = embeds.First(e => e.Description!.Contains("отменена") || e.Description.Contains("Отменена"));
+        Assert.NotNull(cancelledEmbed);
+
+        // Active session embeds contain player names
+        Assert.Contains(embeds, e => e.Description!.Contains("Alice"));
+        Assert.Contains(embeds, e => e.Description!.Contains("Charlie"));
+
+        // Buttons for active sessions
+        var allButtons = actionRows.SelectMany(r => r).OfType<ButtonProperties>().ToList();
+        Assert.Contains(allButtons, b => b.CustomId == $"join_session:{firstSessionId}");
+        Assert.Contains(allButtons, b => b.CustomId == $"leave_session:{firstSessionId}");
+        Assert.Contains(allButtons, b => b.CustomId == $"join_session:{secondSessionId}");
+        Assert.Contains(allButtons, b => b.CustomId == $"leave_session:{secondSessionId}");
+    }
+
+    [Fact]
+    public void Render_ShouldSkipActionRowsForCancelledSessions()
+    {
+        var cancelledSessionId = Guid.NewGuid();
+        var sessions = new[] { new SessionBatchDto(cancelledSessionId, DateTime.UtcNow, SessionStatus.Cancelled, null, "") };
+        var participants = Array.Empty<ParticipantBatchDto>();
+
+        var view = SessionBatchViewBuilder.Build("Test", sessions, participants);
+        var (embeds, actionRows) = DiscordSessionBatchRenderer.Render(view);
+
+        Assert.Single(embeds);
+        Assert.Empty(actionRows);
+    }
+
+    [Fact]
+    public void Render_ShouldShowWaitlistButtonWhenFull()
+    {
+        var sessionId = Guid.NewGuid();
+        var sessions = new[] { new SessionBatchDto(sessionId, DateTime.UtcNow, SessionStatus.Planned, 1, "https://example.com/game") };
+        var participants = new[] { new ParticipantBatchDto(sessionId, "Alice", "alice", ParticipantRegistrationStatus.Active) };
+
+        var view = SessionBatchViewBuilder.Build("Test", sessions, participants);
+        var (_, actionRows) = DiscordSessionBatchRenderer.Render(view);
+        var buttons = actionRows.SelectMany(r => r).OfType<ButtonProperties>().ToList();
+        var joinButton = buttons.First(b => b.CustomId == $"join_session:{sessionId}");
+
+        Assert.Contains("ожидания", joinButton.Label);
+    }
+
+    [Fact]
+    public void Render_ShouldUseRedColorForCancelledSessions()
+    {
+        var sessionId = Guid.NewGuid();
+        var sessions = new[] { new SessionBatchDto(sessionId, DateTime.UtcNow, SessionStatus.Cancelled, null, "") };
+        var participants = Array.Empty<ParticipantBatchDto>();
+
+        var view = SessionBatchViewBuilder.Build("Test", sessions, participants);
+        var (embeds, _) = DiscordSessionBatchRenderer.Render(view);
+
+        Assert.Equal(0xED4245, embeds[0].Color.RawValue);
+    }
+
+    [Fact]
+    public void Render_ShouldUseGreenColorForOpenSessions()
+    {
+        var sessionId = Guid.NewGuid();
+        var sessions = new[] { new SessionBatchDto(sessionId, DateTime.UtcNow, SessionStatus.Planned, 4, "https://example.com/game") };
+        var participants = Array.Empty<ParticipantBatchDto>();
+
+        var view = SessionBatchViewBuilder.Build("Test", sessions, participants);
+        var (embeds, _) = DiscordSessionBatchRenderer.Render(view);
+
+        Assert.Equal(0x57F287, embeds[0].Color.RawValue);
+    }
+
+    [Fact]
+    public void Render_ShouldUseYellowColorForFullSessions()
+    {
+        var sessionId = Guid.NewGuid();
+        var sessions = new[] { new SessionBatchDto(sessionId, DateTime.UtcNow, SessionStatus.Planned, 1, "https://example.com/game") };
+        var participants = new[] { new ParticipantBatchDto(sessionId, "Alice", "alice", ParticipantRegistrationStatus.Active) };
+
+        var view = SessionBatchViewBuilder.Build("Test", sessions, participants);
+        var (embeds, _) = DiscordSessionBatchRenderer.Render(view);
+
+        Assert.Equal(0xFEE75C, embeds[0].Color.RawValue);
+    }
+
+    [Fact]
+    public void Render_ShouldHandleRescheduleStatus()
+    {
+        var sessionId = Guid.NewGuid();
+        var sessions = new[] { new SessionBatchDto(sessionId, DateTime.UtcNow, "Rescheduled", 4, "") };
+        var participants = Array.Empty<ParticipantBatchDto>();
+
+        var view = SessionBatchViewBuilder.Build("Test", sessions, participants);
+        var (embeds, actionRows) = DiscordSessionBatchRenderer.Render(view);
+
+        Assert.Single(embeds);
+        Assert.Single(actionRows); // not cancelled → actions present
+    }
+}
@@ -392,8 +392,8 @@
          "Aspire.Npgsql": "[13.2.2, )",
          "Dapper": "[2.1.72, )",
          "Dapper.AOT": "[1.0.48, )",
-          "GmRelay.ServiceDefaults": "[2.1.1, )",
-          "GmRelay.Shared": "[2.1.1, )",
+          "GmRelay.ServiceDefaults": "[2.5.0, )",
+          "GmRelay.Shared": "[2.5.0, )",
          "Npgsql": "[10.0.2, )",
          "Telegram.Bot": "[22.9.5.3, )",
          "dbup-postgresql": "[7.0.1, )"
@@ -403,10 +403,12 @@
        "type": "Project",
        "dependencies": {
          "Aspire.Npgsql": "[13.2.2, )",
-          "GmRelay.ServiceDefaults": "[2.1.1, )",
-          "GmRelay.Shared": "[2.1.1, )",
+          "Dapper": "[2.1.72, )",
+          "GmRelay.ServiceDefaults": "[2.5.0, )",
+          "GmRelay.Shared": "[2.5.0, )",
          "NetCord.Hosting": "[1.0.0-alpha.489, )",
          "NetCord.Hosting.Services": "[1.0.0-alpha.489, )",
+          "NetCord.Services": "[1.0.0-alpha.489, )",
          "Npgsql": "[10.0.2, )"
        }
      },
@@ -423,15 +425,19 @@
        }
      },
      "gmrelay.shared": {
-        "type": "Project"
+        "type": "Project",
+        "dependencies": {
+          "Dapper": "[2.1.72, )",
+          "Npgsql": "[10.0.2, )"
+        }
      },
      "gmrelay.web": {
        "type": "Project",
        "dependencies": {
          "Aspire.Npgsql": "[13.2.2, )",
          "Dapper": "[2.1.72, )",
-          "GmRelay.ServiceDefaults": "[2.1.1, )",
-          "GmRelay.Shared": "[2.1.1, )",
+          "GmRelay.ServiceDefaults": "[2.5.0, )",
+          "GmRelay.Shared": "[2.5.0, )",
          "Npgsql": "[10.0.2, )",
          "Telegram.Bot": "[22.9.6.1, )"
        }
Author	SHA1	Message	Date
Toutsu	9ff5cc4a67	Merge pull request #86 : feat(discord): enable session join leave buttons Deploy Telegram Bot / build-and-push (push) Successful in 4m54s Details Deploy Telegram Bot / scan-images (push) Successful in 1m22s Details Deploy Telegram Bot / deploy (push) Successful in 15s Details	2026-05-20 09:09:51 +03:00
Toutsu	3251846001	fix(shared): enable dapper aot for session handlers PR Checks / test-and-build (pull_request) Successful in 6m30s Details	2026-05-20 09:01:34 +03:00
Toutsu	39132be4e8	feat(discord): enable session join leave buttons PR Checks / test-and-build (pull_request) Successful in 6m6s Details Move neutral join/leave handlers into GmRelay.Shared so Telegram and Discord share capacity, waitlist, duplicate-click, and schedule-update behavior. Add Discord component routing for join_session and leave_session buttons with deferred ephemeral replies and serialized schedule message updates. Bump version to 2.5.0 and update Discord docs. Refs #29	2026-05-19 14:13:48 +03:00
Toutsu	90da33154c	Merge pull request #85 : feat(discord): implement /newsession and /listsessions (issue #28 ) Deploy Telegram Bot / build-and-push (push) Successful in 4m19s Details Deploy Telegram Bot / scan-images (push) Successful in 1m17s Details Deploy Telegram Bot / deploy (push) Successful in 13s Details	2026-05-19 12:53:35 +03:00
Toutsu	d55003a2a9	feat(discord): improve UX and add source-level tests for /newsession PR Checks / test-and-build (pull_request) Successful in 5m59s Details - DiscordNewSessionCommand: on success, renders session details via DiscordSessionBatchRenderer.Render() with embeds and action rows. - DiscordNewSessionCommand: uses Discord emoji shortcodes for error and success messages (✅, ⛔, 💥). - DiscordNewSessionHandlerTests: added 7 source-level structural tests verifying Dapper usage, NpgsqlDataSource, permission checks, platform neutrality, transaction safety, CancellationToken usage, and embed rendering in the command. Refs issue #28 Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>	2026-05-19 12:36:17 +03:00
Toutsu	daa59335cc	fix(discord): resolve permission checking for /newsession command - DiscordPermissionChecker: removed dead-code userRoles overload; now only uses resolvedPermissions bitflag (Administrator = 0x8). - DiscordNewSessionCommand: computes resolved permissions from guild user roles via Context.Guild.Users[Id].RoleIds + guild.Roles. - DiscordNewSessionHandler: updated signature to accept ulong resolvedPermissions instead of unused userRoles. - Added ILogger to command for diagnostics on unexpected errors. - Added test: regular user with ManageServer (but not Admin) is rejected. Refs issue #28 Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>	2026-05-19 12:30:25 +03:00
Toutsu	474e7f62f7	chore: bump version to 2.4.0 Synchronized across Directory.Build.props, compose.yaml, deploy.yml, NavMenu.razor, and project structure tests. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>	2026-05-19 11:36:28 +03:00
Toutsu	8666b8984e	feat: register Discord session handlers and permission checker in DI Task 5: DI wiring for DiscordNewSessionHandler, DiscordListSessionsHandler, DiscordPermissionChecker, and DiscordPlatformMessenger. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>	2026-05-19 11:33:33 +03:00
Toutsu	d373ff49ba	feat(discord): add DiscordPlatformMessenger IPlatformMessenger implementation Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>	2026-05-19 11:22:44 +03:00
Toutsu	95aad3a2f6	feat(discord): add /newsession slash command and handler Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>	2026-05-19 11:17:07 +03:00
Toutsu	76456cc28a	feat(discord): add /listsessions slash command and handler Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>	2026-05-19 11:09:45 +03:00
Toutsu	ac8f03ecc9	feat(discord): add DiscordPermissionChecker for session management rights Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>	2026-05-19 10:51:32 +03:00
Toutsu	21760ae6f7	Merge pull request #84 : feat: implement DiscordSessionBatchRenderer for Embed and Buttons Deploy Telegram Bot / build-and-push (push) Successful in 4m7s Details Deploy Telegram Bot / scan-images (push) Successful in 1m13s Details Deploy Telegram Bot / deploy (push) Successful in 12s Details - Render SessionBatchViewModel into NetCord EmbedProperties + ActionRowProperties - 7 tests covering open/full/waitlist/cancelled/reschedule states - Version bump 2.2.0 → 2.3.0 Closes #27	2026-05-18 18:54:04 +03:00
Toutsu	5dddf99288	chore: bump version to 2.3.0 PR Checks / test-and-build (pull_request) Successful in 5m34s Details Synchronized across Directory.Build.props, compose.yaml, deploy.yml, NavMenu.razor, and DiscordProjectStructureTests. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>	2026-05-18 18:08:12 +03:00
Toutsu	1c75994722	feat: implement DiscordSessionBatchRenderer for Embed and Buttons - Render SessionBatchViewModel into NetCord EmbedProperties + ActionRowProperties - One embed per session with game title, Moscow date, players, capacity, waitlist, status - Buttons map AvailableAction to ButtonProperties with platform-neutral custom IDs - Cancelled sessions get embed but no action row - Full sessions trigger waitlist button label - 7 tests covering open/full/waitlist/cancelled/reschedule states Closes #27 Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>	2026-05-18 18:05:35 +03:00
Toutsu	c0147fd310	test: add DiscordSessionBatchRenderer tests (RED) Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>	2026-05-18 17:56:48 +03:00