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
65 changed files with 6076 additions and 250 deletions
@@ -6,7 +6,7 @@ on:
      - main 

 env:
-  VERSION: 2.0.1
+  VERSION: 2.5.0

 jobs:
  # ЧАСТЬ 1: Собираем образы и кладем в Gitea (чтобы делиться с ребятами)
@@ -37,6 +37,20 @@ jobs:
          docker push git.codeanddice.ru/toutsu/gmrelay-bot:latest
          docker push git.codeanddice.ru/toutsu/gmrelay-bot:${{ env.VERSION }}

+      - name: Build Discord Bot image
+        run: |
+          docker build \
+            --label "org.opencontainers.image.source=https://git.codeanddice.ru/${{ gitea.repository }}" \
+            -f src/GmRelay.DiscordBot/Dockerfile \
+            -t git.codeanddice.ru/toutsu/gmrelay-discord-bot:latest \
+            -t git.codeanddice.ru/toutsu/gmrelay-discord-bot:${{ env.VERSION }} \
+            .
+
+      - name: Push Discord Bot image
+        run: |
+          docker push git.codeanddice.ru/toutsu/gmrelay-discord-bot:latest
+          docker push git.codeanddice.ru/toutsu/gmrelay-discord-bot:${{ env.VERSION }}
+
      - name: Build Web image
        run: |
          docker build \
@@ -68,6 +82,14 @@ jobs:
            --format table \
            git.codeanddice.ru/toutsu/gmrelay-bot:${{ env.VERSION }}

+      - name: Scan Discord Bot image
+        run: |
+          trivy image \
+            --severity HIGH,CRITICAL \
+            --exit-code 1 \
+            --format table \
+            git.codeanddice.ru/toutsu/gmrelay-discord-bot:${{ env.VERSION }}
+
      - name: Scan Web image
        run: |
          trivy image \
@@ -88,6 +110,7 @@ jobs:
        run: |
          echo "TELEGRAM_BOT_TOKEN=${{ secrets.TELEGRAM_BOT_TOKEN }}" > .env
          echo "POSTGRES_PASSWORD=${{ secrets.POSTGRES_PASSWORD }}" >> .env
+          echo "DISCORD_BOT_TOKEN=${{ secrets.DISCORD_BOT_TOKEN }}" >> .env
          echo "TELEGRAM_BOT_USERNAME=${{ secrets.TELEGRAM_BOT_USERNAME }}" >> .env
          echo "TELEGRAM_MINI_APP_URL=${{ secrets.TELEGRAM_MINI_APP_URL }}" >> .env

@@ -97,7 +120,7 @@ jobs:
          docker login git.codeanddice.ru/ -u toutsu -p ${{ secrets.GIT_TOKEN }}
          
          # Pull гарантирует, что мы получили нужную версию.
-          docker compose pull bot web
+          docker compose pull bot discord web
          
          # Запускаем! Флаг -d оставит их работать в фоне.
          docker compose up -d
@@ -69,6 +69,9 @@ jobs:
      - name: Build Bot (compile check, includes SAST)
        run: dotnet build src/GmRelay.Bot/GmRelay.Bot.csproj --no-restore

+      - name: Build Discord Bot (compile check, includes SAST)
+        run: dotnet build src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj --no-restore
+
      - name: Build Web (compile check, includes SAST)
        run: dotnet build src/GmRelay.Web/GmRelay.Web.csproj --no-restore

@@ -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>2.0.1</Version>
+    <Version>2.5.0</Version>
    <TargetFramework>net10.0</TargetFramework>
    <LangVersion>preview</LangVersion>
    <Nullable>enable</Nullable>
@@ -2,6 +2,7 @@
  <Folder Name="/src/">
    <Project Path="src/GmRelay.AppHost/GmRelay.AppHost.csproj" />
    <Project Path="src/GmRelay.Bot/GmRelay.Bot.csproj" />
+    <Project Path="src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj" />
    <Project Path="src/GmRelay.ServiceDefaults/GmRelay.ServiceDefaults.csproj" />
    <Project Path="src/GmRelay.Web/GmRelay.Web.csproj" />
  </Folder>
@@ -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:** `v2.0.1`.
+**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.
@@ -47,7 +52,7 @@
 |---|---|
 | Язык | C# 14 (.NET 10) |
 | Архитектура | Vertical Slice + общая библиотека `GmRelay.Shared` |
-| Бот | Telegram.Bot, **Native AOT** |
+| Боты | Telegram.Bot (**Native AOT**), NetCord Gateway (Discord worker) |
 | Веб | Blazor Server |
 | Оркестрация | .NET Aspire (`GmRelay.AppHost`) |
 | БД | PostgreSQL |
@@ -74,6 +79,9 @@ cp .env.example .env
 # Токен от @BotFather (используется ботом и как секретный ключ веб-авторизации)
 TELEGRAM_BOT_TOKEN=ваш_токен_здесь

+# Токен Discord application bot
+DISCORD_BOT_TOKEN=ваш_discord_токен_здесь
+
 # Имя бота без @ (для Telegram Login Widget)
 TELEGRAM_BOT_USERNAME=ваше_имя_бота_здесь

@@ -98,12 +106,15 @@ docker compose up -d
 - создание Docker-сети и volume PostgreSQL;
 - подъём PostgreSQL (`db:5432`);
 - запуск бота с плавной миграцией (DbUp);
+- запуск отдельного Discord Gateway worker на NetCord;
 - запуск веб-приложения с подключением к БД и Telegram API.

 ### 3. Первоначальная настройка
 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

@@ -151,11 +162,10 @@ BACKUP_VOLUME_NAME=game_pgbackups
 ├── src/
 │   ├── GmRelay.AppHost/         # .NET Aspire orchestrator
 │   ├── GmRelay.Bot/             # Telegram-бот (Native AOT)
-│   ├── GmRelay.Migrator/        # DbUp-миграции
+│   ├── GmRelay.DiscordBot/      # Discord Gateway worker на NetCord
 │   ├── GmRelay.ServiceDefaults/  # Aspire service defaults
 │   ├── GmRelay.Shared/          # Общие доменные модели
-│   ├── GmRelay.Web/             # Blazor Server dashboard
-│   └── GmRelay.Worker/          # Background workers
+│   └── GmRelay.Web/             # Blazor Server dashboard
 ├── tests/
 │   └── GmRelay.Bot.Tests/       # xUnit + NSubstitute
 ├── compose.yaml                  # Docker Compose (AMD64 + ARM64)
@@ -49,7 +49,7 @@ services:
        crond -f

  bot:
-    image: git.codeanddice.ru/toutsu/gmrelay-bot:2.0.1
+    image: git.codeanddice.ru/toutsu/gmrelay-bot:2.5.0
    restart: always
    depends_on:
      db:
@@ -66,8 +66,20 @@ services:
      timeout: 5s
      retries: 3

+  discord:
+    image: git.codeanddice.ru/toutsu/gmrelay-discord-bot:2.5.0
+    restart: always
+    depends_on:
+      db:
+        condition: service_healthy
+    environment:
+      - "ConnectionStrings__gmrelaydb=Host=db;Port=5432;Database=gmrelay_db;Username=gmrelay;Password=${POSTGRES_PASSWORD:?Set POSTGRES_PASSWORD in .env}"
+      - "Discord__Token=${DISCORD_BOT_TOKEN:?Set DISCORD_BOT_TOKEN in .env}"
+    networks:
+      - gmrelay
+
  web:
-    image: git.codeanddice.ru/toutsu/gmrelay-web:2.0.1
+    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 +1,731 @@
+# Discord NetCord Gateway Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Add a separate `src/GmRelay.DiscordBot` worker that uses NetCord Gateway for Discord slash commands and component interactions while keeping Telegram dependencies isolated in `src/GmRelay.Bot`.
+
+**Architecture:** Create a new .NET worker project that references `GmRelay.ServiceDefaults` and `GmRelay.Shared`, validates `Discord:Token` during startup, registers NetCord gateway/application command/component services, and logs gateway lifecycle events through NetCord gateway handlers. Keep database connectivity aligned with the existing worker by registering the same `ConnectionStrings:gmrelaydb` `NpgsqlDataSource` pattern, but do not move Telegram code or dependencies.
+
+**Tech Stack:** .NET 10 worker, Aspire service defaults, NetCord.Hosting `1.0.0-alpha.489`, Npgsql `10.0.2`, xUnit, Docker Compose, Gitea Actions.
+
+---
+
+## Issue
+
+- Gitea issue: `#26`, `feat: добавить src/GmRelay.DiscordBot на NetCord Gateway`
+- Labels: `type:feature`, `area:discord`, `area:infra`, `platform:discord`, `priority:p1`, `pending-approval`
+- Version bump: minor, `2.1.1` -> `2.2.0`
+- Branch: `feature/issue-26-discord-netcord-gateway`
+
+## Sources Checked
+
+- NetCord application commands guide: `https://netcord.dev/guides/services/application-commands/introduction.html`
+- NetCord intents guide: `https://netcord.dev/guides/events/intents.html`
+- NetCord gateway handler docs: `https://netcord.dev/docs/NetCord.Hosting.Gateway.html`
+- NuGet flat container for `NetCord.Hosting`: latest observed version `1.0.0-alpha.489`
+
+## File Structure
+
+- Create: `src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj` - Discord worker project and package references.
+- Create: `src/GmRelay.DiscordBot/Program.cs` - host composition, token validation, database registration, NetCord service registration.
+- Create: `src/GmRelay.DiscordBot/DiscordOptions.cs` - strongly typed Discord token/options validation.
+- Create: `src/GmRelay.DiscordBot/Infrastructure/Logging/SecretRedactor.cs` - Discord-local startup redaction without referencing the Telegram worker project.
+- Create: `src/GmRelay.DiscordBot/Infrastructure/Logging/DiscordGatewayLifecycleLogger.cs` - NetCord gateway lifecycle handler for ready/connect/resume/disconnect/close/rate-limit events where available.
+- Create: `src/GmRelay.DiscordBot/Dockerfile` - publish and runtime image for the Discord worker.
+- Modify: `GM-Relay.slnx` - include the new project.
+- Modify: `src/GmRelay.AppHost/GmRelay.AppHost.csproj` - reference the Discord worker for Aspire orchestration.
+- Modify: `src/GmRelay.AppHost/Program.cs` - add `discord` project with PostgreSQL reference.
+- Modify: `tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj` - reference the Discord worker project.
+- Create: `tests/GmRelay.Bot.Tests/Discord/DiscordProjectStructureTests.cs` - source-level tests for solution inclusion, Docker/Compose/CI wiring, and Telegram isolation.
+- Create: `tests/GmRelay.Bot.Tests/Discord/DiscordOptionsTests.cs` - unit tests for token validation.
+- Create: `tests/GmRelay.Bot.Tests/Discord/DiscordStartupTests.cs` - source-level startup tests for NetCord registration, service defaults, and PostgreSQL connection requirements.
+- Modify: `compose.yaml` - add `discord` service and versioned image tag.
+- Modify: `.gitea/workflows/deploy.yml` - build/push/scan/pull Discord image and include `DISCORD_BOT_TOKEN` in `.env`.
+- Modify: `.gitea/workflows/pr-checks.yml` - build the Discord project in PR checks.
+- Modify: `Directory.Build.props` - version `2.2.0`.
+- Modify: `src/GmRelay.Web/Components/Layout/NavMenu.razor` - visible version `v2.2.0`.
+- Generated by restore: `src/GmRelay.DiscordBot/packages.lock.json`.
+- Generated by restore: updates to `tests/GmRelay.Bot.Tests/packages.lock.json` and `src/GmRelay.AppHost/packages.lock.json`.
+
+## TDD Plan
+
+### Task 1: Project Presence And Telegram Isolation
+
+**Files:**
+- Create: `tests/GmRelay.Bot.Tests/Discord/DiscordProjectStructureTests.cs`
+- Modify: `GM-Relay.slnx`
+- Create: `src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj`
+- Create: `src/GmRelay.DiscordBot/Program.cs`
+
+- [ ] **Step 1: Write the failing test**
+
+```csharp
+using System;
+using System.IO;
+
+namespace GmRelay.Bot.Tests.Discord;
+
+public sealed class DiscordProjectStructureTests
+{
+    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 Solution_ShouldIncludeDiscordWorkerProject()
+    {
+        var repoRoot = GetRepoRoot();
+        var solution = File.ReadAllText(Path.Combine(repoRoot, "GM-Relay.slnx"));
+
+        Assert.Contains("src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj", solution);
+    }
+
+    [Fact]
+    public void DiscordWorkerProject_ShouldExistWithoutTelegramDependency()
+    {
+        var repoRoot = GetRepoRoot();
+        var projectPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "GmRelay.DiscordBot.csproj");
+
+        Assert.True(File.Exists(projectPath), "Discord worker project should exist.");
+
+        var project = File.ReadAllText(projectPath);
+        Assert.Contains("Microsoft.NET.Sdk.Worker", project);
+        Assert.Contains("NetCord.Hosting", project);
+        Assert.Contains("GmRelay.ServiceDefaults.csproj", project);
+        Assert.Contains("GmRelay.Shared.csproj", project);
+        Assert.DoesNotContain("Telegram.Bot", project);
+        Assert.DoesNotContain("GmRelay.Bot.csproj", project);
+    }
+
+    [Fact]
+    public void TelegramWorkerProject_ShouldNotReferenceNetCord()
+    {
+        var repoRoot = GetRepoRoot();
+        var project = File.ReadAllText(Path.Combine(repoRoot, "src", "GmRelay.Bot", "GmRelay.Bot.csproj"));
+
+        Assert.DoesNotContain("NetCord", project, StringComparison.OrdinalIgnoreCase);
+    }
+}
+```
+
+- [ ] **Step 2: Run the test to verify it fails**
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter FullyQualifiedName~DiscordProjectStructureTests`
+
+Expected: FAIL because `GM-Relay.slnx` does not include `src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj` and the project file does not exist.
+
+- [ ] **Step 3: Write minimal implementation**
+
+Create `src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj`:
+
+```xml
+<Project Sdk="Microsoft.NET.Sdk.Worker">
+
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <LangVersion>preview</LangVersion>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <UserSecretsId>dotnet-GmRelay.DiscordBot-issue-26</UserSecretsId>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Aspire.Npgsql" Version="13.2.2" />
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="10.0.5" />
+    <PackageReference Include="NetCord.Hosting" Version="1.0.0-alpha.489" />
+    <PackageReference Include="Npgsql" Version="10.0.2" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\GmRelay.ServiceDefaults\GmRelay.ServiceDefaults.csproj" />
+    <ProjectReference Include="..\GmRelay.Shared\GmRelay.Shared.csproj" />
+  </ItemGroup>
+</Project>
+```
+
+Add this project to `GM-Relay.slnx` inside `/src/`:
+
+```xml
+<Project Path="src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj" />
+```
+
+Create temporary minimal `src/GmRelay.DiscordBot/Program.cs`:
+
+```csharp
+var builder = Host.CreateApplicationBuilder(args);
+builder.AddServiceDefaults();
+await builder.Build().RunAsync();
+```
+
+- [ ] **Step 4: Run the test to verify it passes**
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter FullyQualifiedName~DiscordProjectStructureTests`
+
+Expected: PASS.
+
+### Task 2: Token Validation
+
+**Files:**
+- Modify: `tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj`
+- Create: `tests/GmRelay.Bot.Tests/Discord/DiscordOptionsTests.cs`
+- Create: `src/GmRelay.DiscordBot/DiscordOptions.cs`
+
+- [ ] **Step 1: Write the failing test**
+
+Add the project reference to `tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj`:
+
+```xml
+<ProjectReference Include="..\..\src\GmRelay.DiscordBot\GmRelay.DiscordBot.csproj" />
+```
+
+Create `tests/GmRelay.Bot.Tests/Discord/DiscordOptionsTests.cs`:
+
+```csharp
+using GmRelay.DiscordBot;
+
+namespace GmRelay.Bot.Tests.Discord;
+
+public sealed class DiscordOptionsTests
+{
+    [Theory]
+    [InlineData(null)]
+    [InlineData("")]
+    [InlineData("   ")]
+    public void Validate_ShouldRejectMissingToken(string? token)
+    {
+        var options = new DiscordOptions { Token = token };
+
+        var exception = Assert.Throws<InvalidOperationException>(options.Validate);
+
+        Assert.Contains("Discord:Token is required", exception.Message);
+        Assert.Contains("Discord__Token", exception.Message);
+    }
+
+    [Fact]
+    public void Validate_ShouldAcceptConfiguredToken()
+    {
+        var options = new DiscordOptions { Token = "configured-token" };
+
+        options.Validate();
+    }
+}
+```
+
+- [ ] **Step 2: Run the test to verify it fails**
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter FullyQualifiedName~DiscordOptionsTests`
+
+Expected: FAIL at compile time because `GmRelay.DiscordBot.DiscordOptions` is not defined.
+
+- [ ] **Step 3: Write minimal implementation**
+
+Create `src/GmRelay.DiscordBot/DiscordOptions.cs`:
+
+```csharp
+namespace GmRelay.DiscordBot;
+
+public sealed class DiscordOptions
+{
+    public string? Token { get; init; }
+
+    public void Validate()
+    {
+        if (string.IsNullOrWhiteSpace(Token))
+        {
+            throw new InvalidOperationException(
+                "Discord:Token is required. Set via environment variable Discord__Token or user secrets.");
+        }
+    }
+}
+```
+
+- [ ] **Step 4: Run the test to verify it passes**
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter FullyQualifiedName~DiscordOptionsTests`
+
+Expected: PASS.
+
+### Task 3: Startup Wiring For Service Defaults, PostgreSQL, NetCord, And Slash Commands
+
+**Files:**
+- Create: `tests/GmRelay.Bot.Tests/Discord/DiscordStartupTests.cs`
+- Modify: `src/GmRelay.DiscordBot/Program.cs`
+
+- [ ] **Step 1: Write the failing test**
+
+Create `tests/GmRelay.Bot.Tests/Discord/DiscordStartupTests.cs`:
+
+```csharp
+using System;
+using System.IO;
+
+namespace GmRelay.Bot.Tests.Discord;
+
+public sealed class DiscordStartupTests
+{
+    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 Program_ShouldValidateDiscordTokenBeforeRunning()
+    {
+        var program = ReadProgram();
+
+        Assert.Contains("GetRequiredSection(\"Discord\")", program);
+        Assert.Contains("DiscordOptions", program);
+        Assert.Contains(".Validate()", program);
+    }
+
+    [Fact]
+    public void Program_ShouldRegisterServiceDefaultsAndPostgresDataSource()
+    {
+        var program = ReadProgram();
+
+        Assert.Contains("builder.AddServiceDefaults()", program);
+        Assert.Contains("ConnectionStrings:gmrelaydb is required", program);
+        Assert.Contains("NpgsqlDataSource", program);
+        Assert.Contains("SecretRedactor.RedactConnectionString", program);
+    }
+
+    [Fact]
+    public void Program_ShouldRegisterNetCordGatewayApplicationCommandsAndComponents()
+    {
+        var program = ReadProgram();
+
+        Assert.Contains(".AddDiscordGateway", program);
+        Assert.Contains(".AddApplicationCommands", program);
+        Assert.Contains(".AddComponentInteractions", program);
+        Assert.Contains(".AddGatewayHandlers", program);
+        Assert.Contains("AddSlashCommand", program);
+    }
+
+    private static string ReadProgram()
+    {
+        var repoRoot = GetRepoRoot();
+        return File.ReadAllText(Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Program.cs"));
+    }
+}
+```
+
+- [ ] **Step 2: Run the test to verify it fails**
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter FullyQualifiedName~DiscordStartupTests`
+
+Expected: FAIL because `Program.cs` does not validate `Discord:Token`, register `NpgsqlDataSource`, or register NetCord services yet.
+
+- [ ] **Step 3: Write minimal implementation**
+
+Replace `src/GmRelay.DiscordBot/Program.cs` with host composition that:
+
+```csharp
+using GmRelay.DiscordBot;
+using GmRelay.DiscordBot.Infrastructure.Logging;
+using NetCord.Gateway;
+using NetCord.Hosting.Gateway;
+using NetCord.Hosting.Services.ApplicationCommands;
+using NetCord.Hosting.Services.ComponentInteractions;
+using Npgsql;
+
+var builder = Host.CreateApplicationBuilder(args);
+
+builder.AddServiceDefaults();
+
+var discordOptions = builder.Configuration
+    .GetRequiredSection("Discord")
+    .Get<DiscordOptions>() ?? new DiscordOptions();
+discordOptions.Validate();
+
+builder.Services.AddSingleton(discordOptions);
+
+builder.Services.AddSingleton<NpgsqlDataSource>(sp =>
+{
+    var config = sp.GetRequiredService<IConfiguration>();
+    var loggerFactory = sp.GetRequiredService<ILoggerFactory>();
+    var connectionString = config.GetConnectionString("gmrelaydb")
+        ?? throw new InvalidOperationException(
+            "ConnectionStrings:gmrelaydb is required. Set via environment variable ConnectionStrings__gmrelaydb.");
+
+    var logger = loggerFactory.CreateLogger("GmRelay.DiscordBot.Startup");
+    logger.LogInformation(
+        "Configured PostgreSQL data source with connection string {ConnectionString}",
+        SecretRedactor.RedactConnectionString(connectionString));
+
+    return NpgsqlDataSource.Create(connectionString);
+});
+
+builder.Services
+    .AddDiscordGateway(options =>
+    {
+        options.Token = discordOptions.Token;
+        options.Intents = GatewayIntents.Guilds;
+    })
+    .AddApplicationCommands()
+    .AddComponentInteractions()
+    .AddGatewayHandlers(typeof(Program).Assembly);
+
+var host = builder.Build();
+
+host.AddSlashCommand("ping", "Checks whether GM-Relay Discord is online.", () => "Pong!");
+
+await host.RunAsync();
+```
+
+Use the Discord-local `SecretRedactor` namespace instead of `GmRelay.Bot.Infrastructure.Logging` so the new project does not reference the Telegram worker.
+
+Create `src/GmRelay.DiscordBot/Infrastructure/Logging/SecretRedactor.cs`:
+
+```csharp
+using System.Text.RegularExpressions;
+
+namespace GmRelay.DiscordBot.Infrastructure.Logging;
+
+internal static partial class SecretRedactor
+{
+    public static string RedactConnectionString(string connectionString)
+    {
+        return PasswordPattern().Replace(connectionString, "$1***");
+    }
+
+    [GeneratedRegex(@"(?i)(Password\s*=\s*)[^;]+")]
+    private static partial Regex PasswordPattern();
+}
+```
+
+If `GatewayClientOptions.Token` does not accept `string`, adjust to NetCord's required token type after compile feedback while preserving the tests' intent.
+
+- [ ] **Step 4: Run the test to verify it passes**
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter FullyQualifiedName~DiscordStartupTests`
+
+Expected: PASS.
+
+### Task 4: Gateway Lifecycle Logging
+
+**Files:**
+- Modify: `tests/GmRelay.Bot.Tests/Discord/DiscordStartupTests.cs`
+- Create: `src/GmRelay.DiscordBot/Infrastructure/Logging/DiscordGatewayLifecycleLogger.cs`
+
+- [ ] **Step 1: Write the failing test**
+
+Add to `DiscordStartupTests.cs`:
+
+```csharp
+[Fact]
+public void LifecycleLogger_ShouldLogGatewayLifecycleEventsWithoutTokenValues()
+{
+    var repoRoot = GetRepoRoot();
+    var loggerPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Infrastructure", "Logging", "DiscordGatewayLifecycleLogger.cs");
+
+    Assert.True(File.Exists(loggerPath), "Discord gateway lifecycle logger should exist.");
+
+    var logger = File.ReadAllText(loggerPath);
+    Assert.Contains("IReadyGatewayHandler", logger);
+    Assert.Contains("IDisconnectGatewayHandler", logger);
+    Assert.Contains("IResumeGatewayHandler", logger);
+    Assert.Contains("LogInformation", logger);
+    Assert.DoesNotContain("Token", logger);
+}
+```
+
+- [ ] **Step 2: Run the test to verify it fails**
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter LifecycleLogger_ShouldLogGatewayLifecycleEventsWithoutTokenValues`
+
+Expected: FAIL because `DiscordGatewayLifecycleLogger.cs` does not exist.
+
+- [ ] **Step 3: Write minimal implementation**
+
+Create `src/GmRelay.DiscordBot/Infrastructure/Logging/DiscordGatewayLifecycleLogger.cs` using the concrete NetCord handler signatures from the installed `NetCord.Hosting` package. Minimum behavior:
+
+```csharp
+using Microsoft.Extensions.Logging;
+using NetCord.Gateway;
+using NetCord.Hosting.Gateway;
+
+namespace GmRelay.DiscordBot.Infrastructure.Logging;
+
+public sealed class DiscordGatewayLifecycleLogger(
+    ILogger<DiscordGatewayLifecycleLogger> logger)
+    : IReadyGatewayHandler,
+      IDisconnectGatewayHandler,
+      IResumeGatewayHandler
+{
+    public ValueTask HandleAsync(ReadyEventArgs arg)
+    {
+        logger.LogInformation("Discord gateway ready as application {ApplicationId}", arg.Application.Id);
+        return ValueTask.CompletedTask;
+    }
+
+    public ValueTask HandleAsync(DisconnectEventArgs arg)
+    {
+        logger.LogWarning("Discord gateway disconnected with close status {CloseStatus}", arg.CloseStatus);
+        return ValueTask.CompletedTask;
+    }
+
+    public ValueTask HandleAsync()
+    {
+        logger.LogInformation("Discord gateway session resumed");
+        return ValueTask.CompletedTask;
+    }
+}
+```
+
+If interface signatures differ in `1.0.0-alpha.489`, inspect the package XML/docs and adjust the handlers to compile while keeping ready/disconnect/resume logging and never logging token values.
+
+- [ ] **Step 4: Run the test to verify it passes**
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter LifecycleLogger_ShouldLogGatewayLifecycleEventsWithoutTokenValues`
+
+Expected: PASS.
+
+### Task 5: Runtime Container, Compose, AppHost, And CI Wiring
+
+**Files:**
+- Modify: `tests/GmRelay.Bot.Tests/Discord/DiscordProjectStructureTests.cs`
+- Create: `src/GmRelay.DiscordBot/Dockerfile`
+- Modify: `compose.yaml`
+- Modify: `src/GmRelay.AppHost/GmRelay.AppHost.csproj`
+- Modify: `src/GmRelay.AppHost/Program.cs`
+- Modify: `.gitea/workflows/pr-checks.yml`
+- Modify: `.gitea/workflows/deploy.yml`
+
+- [ ] **Step 1: Write the failing test**
+
+Add to `DiscordProjectStructureTests.cs`:
+
+```csharp
+[Fact]
+public void RuntimeWiring_ShouldIncludeDiscordServiceWithoutCouplingTelegram()
+{
+    var repoRoot = GetRepoRoot();
+    var compose = File.ReadAllText(Path.Combine(repoRoot, "compose.yaml"));
+    var appHostProject = File.ReadAllText(Path.Combine(repoRoot, "src", "GmRelay.AppHost", "GmRelay.AppHost.csproj"));
+    var appHostProgram = File.ReadAllText(Path.Combine(repoRoot, "src", "GmRelay.AppHost", "Program.cs"));
+    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("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);
+    Assert.Contains("dotnet build src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj --no-restore", prChecks);
+    Assert.Contains("GmRelay.DiscordBot.csproj", appHostProject);
+    Assert.Contains("Projects.GmRelay_DiscordBot", appHostProgram);
+}
+```
+
+- [ ] **Step 2: Run the test to verify it fails**
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter RuntimeWiring_ShouldIncludeDiscordServiceWithoutCouplingTelegram`
+
+Expected: FAIL because runtime wiring is not present.
+
+- [ ] **Step 3: Write minimal implementation**
+
+Create `src/GmRelay.DiscordBot/Dockerfile` modeled after `src/GmRelay.Bot/Dockerfile`, with project copy/restore for `GmRelay.DiscordBot`, `GmRelay.ServiceDefaults`, and `GmRelay.Shared`, and entrypoint `./GmRelay.DiscordBot`.
+
+Add `discord` service to `compose.yaml`:
+
+```yaml
+  discord:
+    image: git.codeanddice.ru/toutsu/gmrelay-discord-bot:2.2.0
+    restart: always
+    depends_on:
+      db:
+        condition: service_healthy
+    environment:
+      - "ConnectionStrings__gmrelaydb=Host=db;Port=5432;Database=gmrelay_db;Username=gmrelay;Password=${POSTGRES_PASSWORD:?Set POSTGRES_PASSWORD in .env}"
+      - "Discord__Token=${DISCORD_BOT_TOKEN:?Set DISCORD_BOT_TOKEN in .env}"
+    networks:
+      - gmrelay
+```
+
+Add Discord project reference to `src/GmRelay.AppHost/GmRelay.AppHost.csproj`:
+
+```xml
+<ProjectReference Include="..\GmRelay.DiscordBot\GmRelay.DiscordBot.csproj" />
+```
+
+Add Discord service to `src/GmRelay.AppHost/Program.cs`:
+
+```csharp
+builder.AddProject<Projects.GmRelay_DiscordBot>("discord")
+    .WithReference(postgres)
+    .WaitFor(postgres);
+```
+
+Update `.gitea/workflows/pr-checks.yml` with:
+
+```yaml
+      - name: Build Discord Bot (compile check, includes SAST)
+        run: dotnet build src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj --no-restore
+```
+
+Update `.gitea/workflows/deploy.yml` to build, push, scan, pull, and deploy `git.codeanddice.ru/toutsu/gmrelay-discord-bot:${{ env.VERSION }}` and write `DISCORD_BOT_TOKEN=${{ secrets.DISCORD_BOT_TOKEN }}` to `.env`.
+
+- [ ] **Step 4: Run the test to verify it passes**
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter RuntimeWiring_ShouldIncludeDiscordServiceWithoutCouplingTelegram`
+
+Expected: PASS.
+
+### Task 6: Version Synchronization
+
+**Files:**
+- Modify: `tests/GmRelay.Bot.Tests/Discord/DiscordProjectStructureTests.cs`
+- Modify: `Directory.Build.props`
+- Modify: `compose.yaml`
+- Modify: `.gitea/workflows/deploy.yml`
+- Modify: `src/GmRelay.Web/Components/Layout/NavMenu.razor`
+
+- [ ] **Step 1: Write the failing test**
+
+Add to `DiscordProjectStructureTests.cs`:
+
+```csharp
+[Fact]
+public void Version_ShouldBeSynchronizedForDiscordFeatureRelease()
+{
+    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("v2.2.0", File.ReadAllText(Path.Combine(repoRoot, "src", "GmRelay.Web", "Components", "Layout", "NavMenu.razor")));
+}
+```
+
+- [ ] **Step 2: Run the test to verify it fails**
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter Version_ShouldBeSynchronizedForDiscordFeatureRelease`
+
+Expected: FAIL because current version is `2.1.1`.
+
+- [ ] **Step 3: Write minimal implementation**
+
+Update:
+- `Directory.Build.props`: `<Version>2.2.0</Version>`
+- `.gitea/workflows/deploy.yml`: `VERSION: 2.2.0`
+- `compose.yaml`: `gmrelay-bot:2.2.0`, `gmrelay-web:2.2.0`, `gmrelay-discord-bot:2.2.0`
+- `src/GmRelay.Web/Components/Layout/NavMenu.razor`: `v2.2.0`
+
+- [ ] **Step 4: Run the test to verify it passes**
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter Version_ShouldBeSynchronizedForDiscordFeatureRelease`
+
+Expected: PASS.
+
+### Task 7: Restore, Format, Build, And Full Test Verification
+
+**Files:**
+- Generated/updated: `src/GmRelay.DiscordBot/packages.lock.json`
+- Generated/updated: `tests/GmRelay.Bot.Tests/packages.lock.json`
+- Generated/updated: `src/GmRelay.AppHost/packages.lock.json`
+- Any code formatting changes required by `dotnet format`
+
+- [ ] **Step 1: Restore lock files**
+
+Run: `dotnet restore GM-Relay.slnx`
+
+Expected: restore succeeds and creates/updates lock files for the new project references and NetCord dependency.
+
+- [ ] **Step 2: Run targeted tests**
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter FullyQualifiedName~Discord`
+
+Expected: all Discord tests pass.
+
+- [ ] **Step 3: Run full tests**
+
+Run: `dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --verbosity normal`
+
+Expected: all tests pass.
+
+- [ ] **Step 4: Run release build**
+
+Run: `dotnet build GM-Relay.slnx -c Release`
+
+Expected: solution build succeeds and includes `src/GmRelay.DiscordBot`.
+
+- [ ] **Step 5: Run format check**
+
+Run: `dotnet format --verify-no-changes --verbosity diagnostic`
+
+Expected: no formatting changes required.
+
+- [ ] **Step 6: Inspect diff for secrets**
+
+Run: `git diff --check`
+
+Expected: no whitespace errors and no Discord token value in tracked files.
+
+Run: `git diff -- . ':!*.lock.json'`
+
+Expected: diff contains configuration variable names such as `Discord__Token` and `DISCORD_BOT_TOKEN`, but not a real token value.
+
+### Task 8: Commit, PR, CI, Deploy, Release, Issue Closure
+
+**Files:**
+- All intended implementation, test, lock, workflow, compose, and version files.
+
+- [ ] **Step 1: Create commit**
+
+Run:
+
+```powershell
+git status --short
+git add GM-Relay.slnx Directory.Build.props compose.yaml .gitea/workflows/deploy.yml .gitea/workflows/pr-checks.yml src/GmRelay.AppHost src/GmRelay.DiscordBot src/GmRelay.Web/Components/Layout/NavMenu.razor tests/GmRelay.Bot.Tests
+git commit -m "feat: add Discord NetCord gateway worker"
+```
+
+Expected: only intended files are staged and committed. Do not stage untracked `CLAUDE.md`.
+
+- [ ] **Step 2: Push branch and open PR**
+
+Run: `git push -u origin feature/issue-26-discord-netcord-gateway`
+
+Create Gitea PR to `main` with:
+- Summary of Discord worker, token validation, runtime wiring, and version bump.
+- Test plan showing targeted Discord tests, full tests, release build, format, and secret diff inspection.
+- Link to issue `#26`.
+
+- [ ] **Step 3: Store Discord token as a Gitea Actions secret**
+
+Use Gitea Actions configuration to create or update repository secret `DISCORD_BOT_TOKEN` with the user-provided Discord bot token.
+
+Expected: token is stored only as an Actions secret. The token value is not written to source files, plan files, logs, PR text, release notes, or commits.
+
+- [ ] **Step 4: Monitor CI**
+
+Use Gitea Actions run reads until PR checks finish. If CI fails, inspect logs, fix with TDD where the failure is code behavior, push again, and re-check.
+
+- [ ] **Step 5: Review, merge, deploy, release**
+
+After CI passes and review is approved:
+- Merge PR.
+- Monitor deploy workflow on `main`.
+- Create release `v2.2.0` with Russian release notes.
+- Close issue `#26` with a comment linking PR and release.
+
+## Self-Review
+
+- Spec coverage: Project creation, NetCord Gateway, slash/component service registration, `Discord__Token`, PostgreSQL service defaults, lifecycle logging, Telegram isolation, solution build, compose/deploy integration, and version sync are covered.
+- Placeholder scan: No task uses `TBD`, `TODO`, or an unspecified "add tests" instruction.
+- Type consistency: Test class names and file paths are consistent across tasks; NetCord lifecycle handler signatures are explicitly marked for compile-driven adjustment because the package is prerelease and must be verified against installed `1.0.0-alpha.489`.
@@ -0,0 +1,599 @@
+# Platform-Neutral Join Leave Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Implement Gitea issue #25 by making join/leave session interactions use platform-neutral command models while preserving Telegram callback behavior, seat limits, and waitlist semantics.
+
+**Architecture:** Telegram callback routing remains in `UpdateRouter`, but it becomes an adapter that converts callback data into `PlatformUser`, `PlatformGroup`, and `PlatformMessageRef` values. `JoinSessionHandler` and `LeaveSessionHandler` operate on those neutral values, persist players by `(platform, external_user_id)`, and update schedules through `IPlatformMessenger`.
+
+**Tech Stack:** .NET 10, xUnit, Dapper, Npgsql, Gitea Actions.
+
+---
+
+## Issue Context
+
+- Issue: `#25 refactor: obobshchit JoinSession i LeaveSession pod platform-neutral interactions`
+- Labels: `area:bot`, `area:platform`, `area:shared`, `platform:multi`, `type:refactor`
+- Version bump: patch, `2.1.0` -> `2.1.1`. The issue is labeled refactor, not breaking; do not use a major bump without explicit approval.
+- Existing untracked file: `CLAUDE.md`; do not stage or modify it.
+
+## File Map
+
+- Create: `tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/PlatformNeutralSessionInteractionCommandTests.cs`
+  - Reflection tests proving join/leave command records expose neutral properties and no Telegram-specific identity/message fields.
+- Create: `tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/PlatformNeutralSessionInteractionSqlTests.cs`
+  - Source-level regression tests for handler SQL and messenger boundaries.
+- Modify: `tests/GmRelay.Bot.Tests/Infrastructure/Database/PlatformIdentityMigrationTests.cs`
+  - Add a migration test for nullable legacy `players.telegram_id`, required for non-Telegram player inserts.
+- Create: `src/GmRelay.Bot/Migrations/V017__allow_platform_neutral_players.sql`
+  - Drop `NOT NULL` from legacy Telegram-only player columns.
+- Modify: `src/GmRelay.Bot/Features/Sessions/CreateSession/JoinSessionHandler.cs`
+  - Change `JoinSessionCommand` to neutral properties and query/upsert players by platform identity.
+- Modify: `src/GmRelay.Bot/Features/Sessions/CreateSession/LeaveSessionHandler.cs`
+  - Change `LeaveSessionCommand` to neutral properties and find participants by platform identity.
+- Modify: `src/GmRelay.Bot/Infrastructure/Telegram/UpdateRouter.cs`
+  - Convert Telegram callback data into neutral command values using `TelegramPlatformIds`.
+- Modify: version files after implementation:
+  - `Directory.Build.props`
+  - `compose.yaml`
+  - `.gitea/workflows/deploy.yml`
+  - `src/GmRelay.Web/Components/Layout/NavMenu.razor`
+
+## Task 1: RED - Command Model Tests
+
+**Files:**
+- Create: `tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/PlatformNeutralSessionInteractionCommandTests.cs`
+
+- [ ] **Step 1: Write failing command-shape tests**
+
+```csharp
+using GmRelay.Bot.Features.Sessions.CreateSession;
+using GmRelay.Shared.Platform;
+
+namespace GmRelay.Bot.Tests.Features.Sessions.CreateSession;
+
+public sealed class PlatformNeutralSessionInteractionCommandTests
+{
+    [Fact]
+    public void JoinSessionCommand_ShouldExposePlatformNeutralInteractionContext()
+    {
+        AssertProperty<JoinSessionCommand>("SessionId", typeof(Guid));
+        AssertProperty<JoinSessionCommand>("User", typeof(PlatformUser));
+        AssertProperty<JoinSessionCommand>("InteractionId", typeof(string));
+        AssertProperty<JoinSessionCommand>("Group", typeof(PlatformGroup));
+        AssertProperty<JoinSessionCommand>("ScheduleMessage", typeof(PlatformMessageRef));
+        AssertNoTelegramSpecificProperties<JoinSessionCommand>();
+    }
+
+    [Fact]
+    public void LeaveSessionCommand_ShouldExposePlatformNeutralInteractionContext()
+    {
+        AssertProperty<LeaveSessionCommand>("SessionId", typeof(Guid));
+        AssertProperty<LeaveSessionCommand>("User", typeof(PlatformUser));
+        AssertProperty<LeaveSessionCommand>("InteractionId", typeof(string));
+        AssertProperty<LeaveSessionCommand>("Group", typeof(PlatformGroup));
+        AssertProperty<LeaveSessionCommand>("ScheduleMessage", typeof(PlatformMessageRef));
+        AssertNoTelegramSpecificProperties<LeaveSessionCommand>();
+    }
+
+    private static void AssertProperty<T>(string name, Type expectedType)
+    {
+        var property = Assert.Single(typeof(T).GetProperties(), property => property.Name == name);
+
+        Assert.Equal(expectedType, property.PropertyType);
+    }
+
+    private static void AssertNoTelegramSpecificProperties<T>()
+    {
+        var names = typeof(T).GetProperties().Select(property => property.Name).ToArray();
+
+        Assert.DoesNotContain(names, name => name.Contains("Telegram", StringComparison.Ordinal));
+        Assert.DoesNotContain("ChatId", names);
+        Assert.DoesNotContain("MessageId", names);
+        Assert.DoesNotContain("TelegramUserId", names);
+        Assert.DoesNotContain("TelegramUsername", names);
+    }
+}
+```
+
+- [ ] **Step 2: Verify RED**
+
+Run:
+
+```powershell
+dotnet test .\tests\GmRelay.Bot.Tests\GmRelay.Bot.Tests.csproj --filter PlatformNeutralSessionInteractionCommandTests
+```
+
+Expected: FAIL because `JoinSessionCommand` and `LeaveSessionCommand` still expose `TelegramUserId`, `ChatId`, and `MessageId`, and do not expose `User`, `Group`, or `ScheduleMessage`.
+
+## Task 2: RED - SQL and Boundary Tests
+
+**Files:**
+- Create: `tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/PlatformNeutralSessionInteractionSqlTests.cs`
+- Modify: `tests/GmRelay.Bot.Tests/Infrastructure/Database/PlatformIdentityMigrationTests.cs`
+
+- [ ] **Step 1: Write failing handler source tests**
+
+```csharp
+namespace GmRelay.Bot.Tests.Features.Sessions.CreateSession;
+
+public sealed class PlatformNeutralSessionInteractionSqlTests
+{
+    [Fact]
+    public async Task JoinSessionHandler_ShouldPersistPlayersByPlatformIdentity()
+    {
+        var handler = await ReadRepositoryFileAsync("src/GmRelay.Bot/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);
+        Assert.Contains("ExternalUserId", handler, StringComparison.Ordinal);
+        Assert.Contains("ExternalUsername", handler, StringComparison.Ordinal);
+        Assert.DoesNotContain("TelegramPlatformIds.", handler, StringComparison.Ordinal);
+        Assert.DoesNotContain("command.TelegramUserId", handler, StringComparison.Ordinal);
+        Assert.DoesNotContain("command.TelegramUsername", handler, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public async Task LeaveSessionHandler_ShouldFindParticipantsByPlatformIdentity()
+    {
+        var handler = await ReadRepositoryFileAsync("src/GmRelay.Bot/Features/Sessions/CreateSession/LeaveSessionHandler.cs");
+
+        Assert.Contains("p.platform = @Platform", handler, StringComparison.Ordinal);
+        Assert.Contains("p.external_user_id = @ExternalUserId", handler, StringComparison.Ordinal);
+        Assert.DoesNotContain("p.telegram_id = @TelegramUserId", handler, StringComparison.Ordinal);
+        Assert.DoesNotContain("TelegramPlatformIds.", handler, StringComparison.Ordinal);
+        Assert.DoesNotContain("command.TelegramUserId", handler, StringComparison.Ordinal);
+    }
+
+    [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");
+
+        Assert.Contains("new PlatformScheduleMessage(", joinHandler, StringComparison.Ordinal);
+        Assert.Contains("command.Group", joinHandler, StringComparison.Ordinal);
+        Assert.Contains("command.ScheduleMessage", joinHandler, StringComparison.Ordinal);
+        Assert.Contains("new PlatformScheduleMessage(", leaveHandler, StringComparison.Ordinal);
+        Assert.Contains("command.Group", leaveHandler, StringComparison.Ordinal);
+        Assert.Contains("command.ScheduleMessage", leaveHandler, 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}'.");
+    }
+}
+```
+
+- [ ] **Step 2: Add failing migration assertion**
+
+Append to `PlatformIdentityMigrationTests`:
+
+```csharp
+[Fact]
+public async Task MigrationV017_ShouldAllowPlayersWithoutLegacyTelegramId()
+{
+    var migration = await ReadRepositoryFileAsync("src/GmRelay.Bot/Migrations/V017__allow_platform_neutral_players.sql");
+
+    Assert.Contains("ALTER TABLE players", migration, StringComparison.Ordinal);
+    Assert.Contains("telegram_id DROP NOT NULL", migration, StringComparison.Ordinal);
+}
+```
+
+- [ ] **Step 3: Verify RED**
+
+Run:
+
+```powershell
+dotnet test .\tests\GmRelay.Bot.Tests\GmRelay.Bot.Tests.csproj --filter "PlatformNeutralSessionInteractionSqlTests|MigrationV017_ShouldAllowPlayersWithoutLegacyTelegramId"
+```
+
+Expected: FAIL because handlers still use Telegram-specific properties and the V017 migration file does not exist.
+
+## Task 3: GREEN - Add Migration
+
+**Files:**
+- Create: `src/GmRelay.Bot/Migrations/V017__allow_platform_neutral_players.sql`
+
+- [ ] **Step 1: Create the migration**
+
+```sql
+-- =============================================================
+-- V017: Allow platform-neutral players
+-- =============================================================
+-- Legacy Telegram identity columns remain for backward compatibility,
+-- but non-Telegram platform users do not have Telegram ids.
+-- =============================================================
+
+ALTER TABLE players
+    ALTER COLUMN telegram_id DROP NOT NULL;
+```
+
+- [ ] **Step 2: Verify migration test turns green**
+
+Run:
+
+```powershell
+dotnet test .\tests\GmRelay.Bot.Tests\GmRelay.Bot.Tests.csproj --filter MigrationV017_ShouldAllowPlayersWithoutLegacyTelegramId
+```
+
+Expected: PASS.
+
+## Task 4: GREEN - Refactor JoinSessionCommand and Handler
+
+**Files:**
+- Modify: `src/GmRelay.Bot/Features/Sessions/CreateSession/JoinSessionHandler.cs`
+
+- [ ] **Step 1: Replace command record**
+
+Replace the existing `JoinSessionCommand` declaration with:
+
+```csharp
+public sealed record JoinSessionCommand(
+    Guid SessionId,
+    PlatformUser User,
+    string InteractionId,
+    PlatformGroup Group,
+    PlatformMessageRef ScheduleMessage);
+```
+
+- [ ] **Step 2: Replace player upsert**
+
+Use platform identity parameters:
+
+```csharp
+var platform = command.User.Platform.ToString();
+var legacyTelegramId = command.User.Platform == PlatformKind.Telegram
+    ? long.Parse(command.User.ExternalUserId, CultureInfo.InvariantCulture)
+    : (long?)null;
+var legacyTelegramUsername = command.User.Platform == PlatformKind.Telegram
+    ? command.User.ExternalUsername
+    : null;
+
+var playerId = await connection.ExecuteScalarAsync<Guid>(
+    @"INSERT INTO players (telegram_id, display_name, telegram_username, platform, external_user_id, external_username)
+      VALUES (@LegacyTelegramId, @Name, @LegacyTelegramUsername, @Platform, @ExternalUserId, @ExternalUsername)
+      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,
+          telegram_username = COALESCE(EXCLUDED.telegram_username, players.telegram_username),
+          platform = EXCLUDED.platform,
+          external_user_id = EXCLUDED.external_user_id,
+          external_username = EXCLUDED.external_username
+      RETURNING id;",
+    new
+    {
+        LegacyTelegramId = legacyTelegramId,
+        Name = command.User.DisplayName,
+        LegacyTelegramUsername = legacyTelegramUsername,
+        Platform = platform,
+        command.User.ExternalUserId,
+        command.User.ExternalUsername
+    },
+    transaction);
+```
+
+Add `using System.Globalization;` at the top.
+
+- [ ] **Step 3: Update participant display query**
+
+Change the participant projection to prefer platform-neutral username:
+
+```sql
+COALESCE(p.external_username, p.telegram_username) as TelegramUsername
+```
+
+- [ ] **Step 4: Update schedule message and interaction reply usage**
+
+Use:
+
+```csharp
+await messenger.UpdateScheduleAsync(
+    new PlatformScheduleMessage(
+        command.Group,
+        view,
+        command.ScheduleMessage),
+    ct);
+```
+
+and:
+
+```csharp
+private Task AnswerAsync(string interactionId, string text, CancellationToken ct) =>
+    messenger.AnswerInteractionAsync(new PlatformInteractionReply(interactionId, text), ct);
+```
+
+Replace all `command.CallbackQueryId` calls with `command.InteractionId`.
+
+- [ ] **Step 5: Verify command and SQL tests for join**
+
+Run:
+
+```powershell
+dotnet test .\tests\GmRelay.Bot.Tests\GmRelay.Bot.Tests.csproj --filter "JoinSessionCommand_ShouldExposePlatformNeutralInteractionContext|JoinSessionHandler_ShouldPersistPlayersByPlatformIdentity"
+```
+
+Expected: PASS for join-focused tests.
+
+## Task 5: GREEN - Refactor LeaveSessionCommand and Handler
+
+**Files:**
+- Modify: `src/GmRelay.Bot/Features/Sessions/CreateSession/LeaveSessionHandler.cs`
+
+- [ ] **Step 1: Replace command record**
+
+Replace the existing `LeaveSessionCommand` declaration with:
+
+```csharp
+public sealed record LeaveSessionCommand(
+    Guid SessionId,
+    PlatformUser User,
+    string InteractionId,
+    PlatformGroup Group,
+    PlatformMessageRef ScheduleMessage);
+```
+
+- [ ] **Step 2: Replace participant lookup**
+
+Use platform identity instead of Telegram id:
+
+```csharp
+var platform = command.User.Platform.ToString();
+
+var participant = await connection.QuerySingleOrDefaultAsync<LeaveSessionParticipantDto>(
+    """
+    SELECT sp.id AS ParticipantRowId,
+           p.display_name AS DisplayName,
+           sp.registration_status AS RegistrationStatus
+    FROM session_participants sp
+    JOIN players p ON p.id = sp.player_id
+    WHERE sp.session_id = @SessionId
+      AND p.platform = @Platform
+      AND p.external_user_id = @ExternalUserId
+      AND sp.is_gm = false
+    FOR UPDATE OF sp
+    """,
+    new { command.SessionId, Platform = platform, command.User.ExternalUserId },
+    transaction);
+```
+
+- [ ] **Step 3: Update participant display query**
+
+Change the participant projection to:
+
+```sql
+COALESCE(p.external_username, p.telegram_username) AS TelegramUsername
+```
+
+- [ ] **Step 4: Update schedule message and interaction reply usage**
+
+Use:
+
+```csharp
+await messenger.UpdateScheduleAsync(
+    new PlatformScheduleMessage(
+        command.Group,
+        view,
+        command.ScheduleMessage),
+    ct);
+```
+
+Replace all `command.CallbackQueryId` calls with `command.InteractionId`.
+
+- [ ] **Step 5: Verify leave tests**
+
+Run:
+
+```powershell
+dotnet test .\tests\GmRelay.Bot.Tests\GmRelay.Bot.Tests.csproj --filter "LeaveSessionCommand_ShouldExposePlatformNeutralInteractionContext|LeaveSessionHandler_ShouldFindParticipantsByPlatformIdentity|SessionInteractionHandlers_ShouldUpdateSchedulesThroughCommandMessageReference"
+```
+
+Expected: PASS.
+
+## Task 6: GREEN - Convert Telegram Router to Neutral Commands
+
+**Files:**
+- Modify: `src/GmRelay.Bot/Infrastructure/Telegram/UpdateRouter.cs`
+
+- [ ] **Step 1: Add local conversion values in `HandleCallbackQueryAsync`**
+
+After parsing `action`, add:
+
+```csharp
+var user = TelegramPlatformIds.User(
+    query.From.Id,
+    query.From.FirstName + (string.IsNullOrEmpty(query.From.LastName) ? "" : $" {query.From.LastName}"),
+    query.From.Username);
+var group = TelegramPlatformIds.Group(message.Chat.Id, message.MessageThreadId, message.Chat.Title);
+var scheduleMessage = TelegramPlatformIds.Message(message.Chat.Id, message.MessageThreadId, message.MessageId);
+```
+
+- [ ] **Step 2: Update join command construction**
+
+```csharp
+var command = new JoinSessionCommand(
+    SessionId: joinSessionId,
+    User: user,
+    InteractionId: query.Id,
+    Group: group,
+    ScheduleMessage: scheduleMessage);
+```
+
+- [ ] **Step 3: Update leave command construction**
+
+```csharp
+var command = new LeaveSessionCommand(
+    SessionId: leaveSessionId,
+    User: user,
+    InteractionId: query.Id,
+    Group: group,
+    ScheduleMessage: scheduleMessage);
+```
+
+- [ ] **Step 4: Verify compile**
+
+Run:
+
+```powershell
+dotnet test .\tests\GmRelay.Bot.Tests\GmRelay.Bot.Tests.csproj --filter PlatformNeutralSessionInteractionCommandTests
+```
+
+Expected: PASS.
+
+## Task 7: REFACTOR - Clean Up and Full Test Pass
+
+**Files:**
+- Modify only files already listed if cleanup is needed.
+
+- [ ] **Step 1: Remove now-unused Telegram handler imports**
+
+Check `JoinSessionHandler.cs` and `LeaveSessionHandler.cs` for unused:
+
+```csharp
+using GmRelay.Bot.Infrastructure.Telegram;
+```
+
+Remove it from handlers if no longer needed.
+
+- [ ] **Step 2: Run focused tests**
+
+```powershell
+dotnet test .\tests\GmRelay.Bot.Tests\GmRelay.Bot.Tests.csproj --filter "PlatformNeutralSessionInteractionCommandTests|PlatformNeutralSessionInteractionSqlTests|PlatformIdentityMigrationTests"
+```
+
+Expected: PASS.
+
+- [ ] **Step 3: Run full test suite**
+
+```powershell
+dotnet test .\GM-Relay.slnx
+```
+
+Expected: PASS.
+
+- [ ] **Step 4: Build solution**
+
+```powershell
+dotnet build .\GM-Relay.slnx
+```
+
+Expected: PASS.
+
+## Task 8: Version Bump
+
+**Files:**
+- Modify: `Directory.Build.props`
+- Modify: `compose.yaml`
+- Modify: `.gitea/workflows/deploy.yml`
+- Modify: `src/GmRelay.Web/Components/Layout/NavMenu.razor`
+
+- [ ] **Step 1: Update version from `2.1.0` to `2.1.1`**
+
+Expected exact replacements:
+
+```xml
+<Version>2.1.1</Version>
+```
+
+```yaml
+VERSION: 2.1.1
+```
+
+```yaml
+image: git.codeanddice.ru/toutsu/gmrelay-bot:2.1.1
+image: git.codeanddice.ru/toutsu/gmrelay-web:2.1.1
+```
+
+```razor
+<div class="nav-version">v2.1.1</div>
+```
+
+- [ ] **Step 2: Verify synchronized versions**
+
+Run:
+
+```powershell
+rg "<Version>|image: git.codeanddice.ru/toutsu/gmrelay-|VERSION:|nav-version" Directory.Build.props compose.yaml .gitea\workflows\deploy.yml src\GmRelay.Web\Components\Layout\NavMenu.razor
+```
+
+Expected: all project image/app/deploy UI versions show `2.1.1`.
+
+## Task 9: PR, CI, Review, Merge, Deploy, Release
+
+**Files:**
+- No additional source changes expected.
+
+- [ ] **Step 1: Create branch after approval**
+
+```powershell
+git checkout -b refactor/issue-25-platform-neutral-join-leave
+```
+
+- [ ] **Step 2: Stage only intended files**
+
+```powershell
+git add docs/superpowers/plans/2026-05-18-platform-neutral-join-leave.md tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/PlatformNeutralSessionInteractionCommandTests.cs tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/PlatformNeutralSessionInteractionSqlTests.cs tests/GmRelay.Bot.Tests/Infrastructure/Database/PlatformIdentityMigrationTests.cs src/GmRelay.Bot/Migrations/V017__allow_platform_neutral_players.sql src/GmRelay.Bot/Features/Sessions/CreateSession/JoinSessionHandler.cs src/GmRelay.Bot/Features/Sessions/CreateSession/LeaveSessionHandler.cs src/GmRelay.Bot/Infrastructure/Telegram/UpdateRouter.cs Directory.Build.props compose.yaml .gitea/workflows/deploy.yml src/GmRelay.Web/Components/Layout/NavMenu.razor
+```
+
+- [ ] **Step 3: Commit**
+
+```powershell
+git commit -m "refactor: make session join leave platform-neutral"
+```
+
+- [ ] **Step 4: Push and create Gitea PR**
+
+```powershell
+git push -u origin refactor/issue-25-platform-neutral-join-leave
+```
+
+PR title:
+
+```text
+refactor: make session join leave platform-neutral
+```
+
+PR body:
+
+```markdown
+## Summary
+- Closes #25.
+- Converts join/leave session interaction commands from Telegram-specific fields to platform-neutral `PlatformUser`, `PlatformGroup`, and `PlatformMessageRef`.
+- Persists and looks up session participants by `(platform, external_user_id)`.
+- Keeps Telegram callback data and schedule update behavior intact.
+
+## Test plan
+- `dotnet test .\tests\GmRelay.Bot.Tests\GmRelay.Bot.Tests.csproj --filter "PlatformNeutralSessionInteractionCommandTests|PlatformNeutralSessionInteractionSqlTests|PlatformIdentityMigrationTests"`
+- `dotnet test .\GM-Relay.slnx`
+- `dotnet build .\GM-Relay.slnx`
+
+## Workflow
+- [ ] CI passes
+- [ ] Code review approved
+- [ ] Deployed
+- [ ] Release published
+```
+
+- [ ] **Step 5: Watch CI, request review, merge, deploy, release**
+
+Use Gitea MCP for PR creation, CI polling, review, merge, deploy monitoring, and release `v2.1.1`. Close issue #25 after release and add a comment linking the PR and release.
+
+## Self-Review
+
+- Spec coverage: issue scope is covered by neutral command records, Telegram adapter conversion, platform identity SQL, messenger-based schedule updates, and tests.
+- Placeholder scan: no `TBD`, `TODO`, or "fill later" steps remain.
+- Type consistency: commands consistently use `PlatformUser User`, `string InteractionId`, `PlatformGroup Group`, and `PlatformMessageRef ScheduleMessage`.
@@ -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?**
@@ -2,6 +2,7 @@

  <ItemGroup>
    <ProjectReference Include="..\GmRelay.Bot\GmRelay.Bot.csproj" />
+    <ProjectReference Include="..\GmRelay.DiscordBot\GmRelay.DiscordBot.csproj" />
    <ProjectReference Include="..\GmRelay.Web\GmRelay.Web.csproj" />
  </ItemGroup>

@@ -8,6 +8,10 @@ builder.AddProject<Projects.GmRelay_Bot>("bot")
    .WithReference(postgres)
    .WaitFor(postgres);

+builder.AddProject<Projects.GmRelay_DiscordBot>("discord")
+    .WithReference(postgres)
+    .WaitFor(postgres);
+
 builder.AddProject<Projects.GmRelay_Web>("web")
    .WithReference(postgres)
    .WaitFor(postgres);
@@ -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;
@@ -69,17 +70,21 @@ public sealed class UpdateRouter(

        var parts = data.Split(':', 3);
        var action = parts[0];
+        var user = TelegramPlatformIds.User(
+            query.From.Id,
+            query.From.FirstName + (string.IsNullOrEmpty(query.From.LastName) ? "" : $" {query.From.LastName}"),
+            query.From.Username);
+        var group = TelegramPlatformIds.Group(message.Chat.Id, message.MessageThreadId, message.Chat.Title);
+        var scheduleMessage = TelegramPlatformIds.Message(message.Chat.Id, message.MessageThreadId, message.MessageId);

        if (action == "join_session" && parts.Length >= 2 && Guid.TryParse(parts[1], out var joinSessionId))
        {
            var command = new JoinSessionCommand(
                SessionId: joinSessionId,
-                TelegramUserId: query.From.Id,
-                DisplayName: query.From.FirstName + (string.IsNullOrEmpty(query.From.LastName) ? "" : $" {query.From.LastName}"),
-                TelegramUsername: query.From.Username,
-                CallbackQueryId: query.Id,
-                ChatId: message.Chat.Id,
-                MessageId: message.MessageId);
+                User: user,
+                InteractionId: query.Id,
+                Group: group,
+                ScheduleMessage: scheduleMessage);

            await joinSessionHandler.HandleAsync(command, ct);
            return;
@@ -89,10 +94,10 @@ public sealed class UpdateRouter(
        {
            var command = new LeaveSessionCommand(
                SessionId: leaveSessionId,
-                TelegramUserId: query.From.Id,
-                CallbackQueryId: query.Id,
-                ChatId: message.Chat.Id,
-                MessageId: message.MessageId);
+                User: user,
+                InteractionId: query.Id,
+                Group: group,
+                ScheduleMessage: scheduleMessage);

            await leaveSessionHandler.HandleAsync(command, ct);
            return;
@@ -0,0 +1,9 @@
+-- =============================================================
+-- V017: Allow platform-neutral players
+-- =============================================================
+-- Legacy Telegram identity columns remain for backward compatibility,
+-- but non-Telegram platform users do not have Telegram ids.
+-- =============================================================
+
+ALTER TABLE players
+    ALTER COLUMN telegram_id DROP NOT NULL;
@@ -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 +1,15 @@
+namespace GmRelay.DiscordBot;
+
+public sealed class DiscordOptions
+{
+    public string? Token { get; init; }
+
+    public void Validate()
+    {
+        if (string.IsNullOrWhiteSpace(Token))
+        {
+            throw new InvalidOperationException(
+                "Discord:Token is required. Set via environment variable Discord__Token or user secrets.");
+        }
+    }
+}
@@ -0,0 +1,20 @@
+# Stage 1: Build
+FROM mcr.microsoft.com/dotnet/sdk:10.0-noble AS build
+WORKDIR /src
+
+COPY ["src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj", "src/GmRelay.DiscordBot/"]
+COPY ["src/GmRelay.ServiceDefaults/GmRelay.ServiceDefaults.csproj", "src/GmRelay.ServiceDefaults/"]
+COPY ["src/GmRelay.Shared/GmRelay.Shared.csproj", "src/GmRelay.Shared/"]
+
+RUN dotnet restore "src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj"
+
+COPY src/ src/
+WORKDIR /src/src/GmRelay.DiscordBot
+RUN dotnet publish "GmRelay.DiscordBot.csproj" -c Release -o /app/publish /p:UseAppHost=false
+
+# Stage 2: Runtime
+FROM mcr.microsoft.com/dotnet/runtime:10.0-noble AS final
+WORKDIR /app
+COPY --from=build /app/publish .
+USER $APP_UID
+ENTRYPOINT ["dotnet", "GmRelay.DiscordBot.dll"]
@@ -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));
+}
@@ -0,0 +1,25 @@
+<Project Sdk="Microsoft.NET.Sdk.Worker">
+
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <LangVersion>preview</LangVersion>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <UserSecretsId>dotnet-GmRelay.DiscordBot-issue-26</UserSecretsId>
+  </PropertyGroup>
+
+  <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>
+
+  <ItemGroup>
+    <ProjectReference Include="..\GmRelay.ServiceDefaults\GmRelay.ServiceDefaults.csproj" />
+    <ProjectReference Include="..\GmRelay.Shared\GmRelay.Shared.csproj" />
+  </ItemGroup>
+</Project>
@@ -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;
+    }
+}
@@ -0,0 +1,43 @@
+using NetCord.Gateway;
+using NetCord.Hosting.Gateway;
+
+namespace GmRelay.DiscordBot.Infrastructure.Logging;
+
+public sealed class DiscordGatewayLifecycleLogger(
+    ILogger<DiscordGatewayLifecycleLogger> logger)
+    : IConnectGatewayHandler,
+      IReadyGatewayHandler,
+      IDisconnectGatewayHandler,
+      IResumeGatewayHandler
+{
+    public ValueTask HandleAsync()
+    {
+        logger.LogInformation("Discord gateway connected");
+        return ValueTask.CompletedTask;
+    }
+
+    public ValueTask HandleAsync(ReadyEventArgs arg)
+    {
+        logger.LogInformation(
+            "Discord gateway ready for application {ApplicationId} in {GuildCount} guilds",
+            arg.ApplicationId,
+            arg.GuildIds.Count);
+
+        return ValueTask.CompletedTask;
+    }
+
+    public ValueTask HandleAsync(DisconnectEventArgs arg)
+    {
+        logger.LogWarning(
+            "Discord gateway disconnected; reconnect scheduled: {Reconnect}",
+            arg.Reconnect);
+
+        return ValueTask.CompletedTask;
+    }
+
+    ValueTask IResumeGatewayHandler.HandleAsync()
+    {
+        logger.LogInformation("Discord gateway session resumed");
+        return ValueTask.CompletedTask;
+    }
+}
@@ -0,0 +1,14 @@
+using System.Text.RegularExpressions;
+
+namespace GmRelay.DiscordBot.Infrastructure.Logging;
+
+internal static partial class SecretRedactor
+{
+    public static string RedactConnectionString(string connectionString)
+    {
+        return PasswordPattern().Replace(connectionString, "$1***");
+    }
+
+    [GeneratedRegex(@"(?i)(Password\s*=\s*)[^;]+")]
+    private static partial Regex PasswordPattern();
+}
@@ -0,0 +1,67 @@
+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;
+using NetCord.Gateway;
+using NetCord.Hosting.Gateway;
+using NetCord.Hosting.Services.ApplicationCommands;
+using NetCord.Hosting.Services.ComponentInteractions;
+using NetCord.Services.ComponentInteractions;
+using Npgsql;
+
+var builder = Host.CreateApplicationBuilder(args);
+
+builder.AddServiceDefaults();
+
+var discordOptions = builder.Configuration
+    .GetRequiredSection("Discord")
+    .Get<DiscordOptions>() ?? new DiscordOptions();
+discordOptions.Validate();
+
+builder.Services.AddSingleton(discordOptions);
+
+builder.Services.AddSingleton<NpgsqlDataSource>(sp =>
+{
+    var config = sp.GetRequiredService<IConfiguration>();
+    var loggerFactory = sp.GetRequiredService<ILoggerFactory>();
+    var connectionString = config.GetConnectionString("gmrelaydb")
+        ?? throw new InvalidOperationException(
+            "ConnectionStrings:gmrelaydb is required. Set via environment variable ConnectionStrings__gmrelaydb.");
+
+    var logger = loggerFactory.CreateLogger("GmRelay.DiscordBot.Startup");
+    logger.LogInformation(
+        "Configured PostgreSQL data source with connection string {ConnectionString}",
+        SecretRedactor.RedactConnectionString(connectionString));
+
+    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 =>
+    {
+        options.Token = discordOptions.Token;
+        options.Intents = GatewayIntents.Guilds;
+    })
+    .AddApplicationCommands()
+    .AddComponentInteractions<ButtonInteraction, ButtonInteractionContext>()
+    .AddGatewayHandlers(typeof(Program).Assembly);
+
+var host = builder.Build();
+
+host.AddSlashCommand("ping", "Checks whether GM-Relay Discord is online.", () => "Pong!");
+
+await host.RunAsync();
@@ -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);
+    }
+}
@@ -0,0 +1,678 @@
+{
+  "version": 1,
+  "dependencies": {
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+          "Microsoft.Extensions.Diagnostics.HealthChecks": "10.0.5",
+          "Microsoft.Extensions.Hosting.Abstractions": "10.0.5",
+          "Microsoft.Extensions.Logging.Abstractions": "10.0.5",
+          "Microsoft.Extensions.Options": "10.0.5",
+          "Microsoft.Extensions.Primitives": "10.0.5",
+          "Npgsql.DependencyInjection": "10.0.1",
+          "Npgsql.OpenTelemetry": "10.0.1",
+          "OpenTelemetry.Extensions.Hosting": "1.15.0"
+        }
+      },
+      "Dapper": {
+        "type": "Direct",
+        "requested": "[2.1.72, )",
+        "resolved": "2.1.72",
+        "contentHash": "ns4mGqQd9a/MhP8m6w556vVlZIa0/MfUu03zrxjZC/jlr1uVCsUac8bkdB+Fs98Llbd56rRSo1eZH5VVmeGZyw=="
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+      "Microsoft.Extensions.Hosting": {
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+          "Microsoft.Extensions.Configuration.UserSecrets": "10.0.5",
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+        }
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+        }
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+  }
+}
@@ -0,0 +1 @@
+[module: Dapper.DapperAot]
@@ -1,31 +1,32 @@
+using System.Globalization;
 using Dapper;
 using Npgsql;
 using GmRelay.Shared.Domain;
 using GmRelay.Shared.Platform;
 using GmRelay.Shared.Rendering;
-using GmRelay.Bot.Infrastructure.Telegram;
+using Microsoft.Extensions.Logging;

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

 public sealed record JoinSessionCommand(
    Guid SessionId,
-    long TelegramUserId,
-    string DisplayName,
-    string? TelegramUsername,
-    string CallbackQueryId,
-    long ChatId,
-    int MessageId);
+    PlatformUser User,
+    string InteractionId,
+    PlatformGroup Group,
+    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;
@@ -33,22 +34,40 @@ public sealed class JoinSessionHandler(
        try
        {
            // 1. Убеждаемся, что игрок есть в базе
+            var platform = command.User.Platform.ToString();
+            var legacyTelegramId = command.User.Platform == PlatformKind.Telegram
+                ? long.Parse(command.User.ExternalUserId, CultureInfo.InvariantCulture)
+                : (long?)null;
+            var legacyTelegramUsername = command.User.Platform == PlatformKind.Telegram
+                ? command.User.ExternalUsername
+                : null;
+
            var playerId = await connection.ExecuteScalarAsync<Guid>(
                @"INSERT INTO players (telegram_id, display_name, telegram_username, platform, external_user_id, external_username)
-                  VALUES (@TgId, @Name, @Username, 'Telegram', @TgId::TEXT, @Username)
-                  ON CONFLICT (telegram_id) DO UPDATE
+                  VALUES (@LegacyTelegramId, @Name, @LegacyTelegramUsername, @Platform, @ExternalUserId, @ExternalUsername)
+                  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,
-                      telegram_username = EXCLUDED.telegram_username,
-                      platform = COALESCE(players.platform, 'Telegram'),
-                      external_user_id = COALESCE(players.external_user_id, EXCLUDED.telegram_id::TEXT),
-                      external_username = COALESCE(players.external_username, EXCLUDED.telegram_username)
+                      telegram_username = COALESCE(EXCLUDED.telegram_username, players.telegram_username),
+                      platform = EXCLUDED.platform,
+                      external_user_id = EXCLUDED.external_user_id,
+                      external_username = EXCLUDED.external_username
                  RETURNING id;",
-                new { TgId = command.TelegramUserId, Name = command.DisplayName, Username = command.TelegramUsername },
+                new
+                {
+                    LegacyTelegramId = legacyTelegramId,
+                    Name = command.User.DisplayName,
+                    LegacyTelegramUsername = legacyTelegramUsername,
+                    Platform = platform,
+                    command.User.ExternalUserId,
+                    command.User.ExternalUsername
+                },
                transaction);

            // 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",
@@ -58,7 +77,14 @@ public sealed class JoinSessionHandler(
            if (batchInfo is null)
            {
                await transaction.RollbackAsync(ct);
-                await AnswerAsync(command.CallbackQueryId, "Сессия не найдена.", ct);
+                await AnswerAsync(command.InteractionId, "Сессия не найдена.", ct);
+                return;
+            }
+
+            if (SessionStatus.IsCancelled(batchInfo.Status))
+            {
+                await transaction.RollbackAsync(ct);
+                await AnswerAsync(command.InteractionId, "Сессия уже отменена.", ct);
                return;
            }

@@ -79,7 +105,7 @@ public sealed class JoinSessionHandler(
                var alreadyText = existingRegistrationStatus == ParticipantRegistrationStatus.Waitlisted
                    ? "Вы уже в листе ожидания!"
                    : "Вы уже записаны!";
-                await AnswerAsync(command.CallbackQueryId, alreadyText, ct);
+                await AnswerAsync(command.InteractionId, alreadyText, ct);
                return;
            }

@@ -113,7 +139,7 @@ public sealed class JoinSessionHandler(
            if (inserted == 0)
            {
                await transaction.RollbackAsync(ct);
-                await AnswerAsync(command.CallbackQueryId, "Вы уже записаны!", ct);
+                await AnswerAsync(command.InteractionId, "Вы уже записаны!", ct);
                return;
            }

@@ -128,7 +154,7 @@ public sealed class JoinSessionHandler(
            var batchParticipants = await connection.QueryAsync<ParticipantBatchDto>(
                @"SELECT sp.session_id as SessionId,
                         p.display_name as DisplayName,
-                         p.telegram_username as TelegramUsername,
+                         COALESCE(p.external_username, p.telegram_username) as TelegramUsername,
                         sp.registration_status as RegistrationStatus
                  FROM session_participants sp
                  JOIN players p ON sp.player_id = p.id
@@ -144,15 +170,15 @@ public sealed class JoinSessionHandler(
            var view = SessionBatchViewBuilder.Build(batchInfo.Title, batchSessions.ToList(), batchParticipants.ToList());
            await messenger.UpdateScheduleAsync(
                new PlatformScheduleMessage(
-                    TelegramPlatformIds.Group(command.ChatId),
+                    command.Group,
                    view,
-                    TelegramPlatformIds.Message(command.ChatId, threadId: null, command.MessageId)),
+                    command.ScheduleMessage),
                ct);

            var callbackText = registrationStatus == ParticipantRegistrationStatus.Waitlisted
                ? "Основной состав заполнен. Вы добавлены в лист ожидания."
                : "Вы успешно записаны!";
-            await AnswerAsync(command.CallbackQueryId, callbackText, ct);
+            await AnswerAsync(command.InteractionId, callbackText, ct);
        }
        catch (Exception ex)
        {
@@ -165,10 +191,10 @@ public sealed class JoinSessionHandler(
            var errorText = transactionCommitted
                ? "Регистрация сохранена, но не удалось обновить сообщение расписания."
                : "Произошла ошибка при регистрации.";
-            await AnswerAsync(command.CallbackQueryId, errorText, ct);
+            await AnswerAsync(command.InteractionId, errorText, ct);
        }
    }

-    private Task AnswerAsync(string callbackQueryId, string text, CancellationToken ct) =>
-        messenger.AnswerInteractionAsync(new PlatformInteractionReply(callbackQueryId, text), ct);
+    private Task AnswerAsync(string interactionId, string text, CancellationToken ct) =>
+        messenger.AnswerInteractionAsync(new PlatformInteractionReply(interactionId, text), ct);
 }
@@ -2,17 +2,17 @@ using Dapper;
 using GmRelay.Shared.Domain;
 using GmRelay.Shared.Platform;
 using GmRelay.Shared.Rendering;
+using Microsoft.Extensions.Logging;
 using Npgsql;
-using GmRelay.Bot.Infrastructure.Telegram;

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

 public sealed record LeaveSessionCommand(
    Guid SessionId,
-    long TelegramUserId,
-    string CallbackQueryId,
-    long ChatId,
-    int MessageId);
+    PlatformUser User,
+    string InteractionId,
+    PlatformGroup Group,
+    PlatformMessageRef ScheduleMessage);

 internal sealed record LeaveSessionInfoDto(string Title, Guid BatchId, string Status, int? MaxPlayers);
 internal sealed record LeaveSessionParticipantDto(Guid ParticipantRowId, string DisplayName, string RegistrationStatus);
@@ -21,10 +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;
@@ -47,17 +49,19 @@ public sealed class LeaveSessionHandler(
            if (session is null)
            {
                await transaction.RollbackAsync(ct);
-                await AnswerAsync(command.CallbackQueryId, "Сессия не найдена.", ct);
+                await AnswerAsync(command.InteractionId, "Сессия не найдена.", ct);
                return;
            }

            if (SessionStatus.IsCancelled(session.Status))
            {
                await transaction.RollbackAsync(ct);
-                await AnswerAsync(command.CallbackQueryId, "Сессия уже отменена.", ct);
+                await AnswerAsync(command.InteractionId, "Сессия уже отменена.", ct);
                return;
            }

+            var platform = command.User.Platform.ToString();
+
            var participant = await connection.QuerySingleOrDefaultAsync<LeaveSessionParticipantDto>(
                """
                SELECT sp.id AS ParticipantRowId,
@@ -66,17 +70,18 @@ public sealed class LeaveSessionHandler(
                FROM session_participants sp
                JOIN players p ON p.id = sp.player_id
                WHERE sp.session_id = @SessionId
-                  AND p.telegram_id = @TelegramUserId
+                  AND p.platform = @Platform
+                  AND p.external_user_id = @ExternalUserId
                  AND sp.is_gm = false
                FOR UPDATE OF sp
                """,
-                new { command.SessionId, command.TelegramUserId },
+                new { command.SessionId, Platform = platform, command.User.ExternalUserId },
                transaction);

            if (participant is null)
            {
                await transaction.RollbackAsync(ct);
-                await AnswerAsync(command.CallbackQueryId, "Вы не записаны на эту сессию.", ct);
+                await AnswerAsync(command.InteractionId, "Вы не записаны на эту сессию.", ct);
                return;
            }

@@ -170,7 +175,7 @@ public sealed class LeaveSessionHandler(
                """
                SELECT sp.session_id AS SessionId,
                       p.display_name AS DisplayName,
-                       p.telegram_username AS TelegramUsername,
+                       COALESCE(p.external_username, p.telegram_username) AS TelegramUsername,
                       sp.registration_status AS RegistrationStatus
                FROM session_participants sp
                JOIN players p ON sp.player_id = p.id
@@ -187,9 +192,9 @@ public sealed class LeaveSessionHandler(
            var view = SessionBatchViewBuilder.Build(session.Title, batchSessions, batchParticipants);
            await messenger.UpdateScheduleAsync(
                new PlatformScheduleMessage(
-                    TelegramPlatformIds.Group(command.ChatId),
+                    command.Group,
                    view,
-                    TelegramPlatformIds.Message(command.ChatId, threadId: null, command.MessageId)),
+                    command.ScheduleMessage),
                ct);

            var callbackText = participant.RegistrationStatus == ParticipantRegistrationStatus.Waitlisted
@@ -198,7 +203,7 @@ public sealed class LeaveSessionHandler(
                    ? "Вы отписались от сессии."
                    : $"Вы отписались от сессии. Место получил(а) {promotedDisplayName}.";

-            await AnswerAsync(command.CallbackQueryId, callbackText, ct);
+            await AnswerAsync(command.InteractionId, callbackText, ct);
        }
        catch (Exception ex)
        {
@@ -211,10 +216,10 @@ public sealed class LeaveSessionHandler(
            var errorText = transactionCommitted
                ? "Запись снята, но не удалось обновить сообщение расписания."
                : "Произошла ошибка при отмене записи.";
-            await AnswerAsync(command.CallbackQueryId, errorText, ct);
+            await AnswerAsync(command.InteractionId, errorText, ct);
        }
    }

-    private Task AnswerAsync(string callbackQueryId, string text, CancellationToken ct) =>
-        messenger.AnswerInteractionAsync(new PlatformInteractionReply(callbackQueryId, text), ct);
+    private Task AnswerAsync(string interactionId, string text, CancellationToken ct) =>
+        messenger.AnswerInteractionAsync(new PlatformInteractionReply(interactionId, text), ct);
 }
@@ -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=="
      }
    }
  }
@@ -10,7 +10,7 @@
    <ResourcePreloader />
    <link rel="preconnect" href="https://fonts.googleapis.com" />
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
-    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap" rel="stylesheet" />
+    <link href="https://fonts.googleapis.com/css2?family=Cinzel+Decorative:wght@400;700&family=Cinzel:wght@400;600;700&family=Jura:wght@400;500;600;700&display=swap" rel="stylesheet" />
    <link rel="stylesheet" href="@Assets["app.css"]" />
    <link rel="stylesheet" href="@Assets["GmRelay.Web.styles.css"]" />
    <script src="https://telegram.org/js/telegram-web-app.js"></script>
@@ -30,8 +30,9 @@

 /* === Error UI === */
 #blazor-error-ui {
-    background: var(--bg-secondary);
-    border-top: 1px solid var(--border-color);
+    background: var(--status-danger-bg);
+    color: var(--status-danger);
+    border-top: 1px solid rgba(239, 68, 68, 0.15);
    bottom: 0;
    box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.3);
    box-sizing: border-box;
@@ -41,8 +42,9 @@
    position: fixed;
    width: 100%;
    z-index: 1000;
-    color: var(--text-secondary);
    font-size: 0.875rem;
+    font-family: 'Jura', sans-serif;
+    font-weight: 500;
 }

    #blazor-error-ui .reload {
@@ -56,7 +56,7 @@
                    </button>
                </form>

-                <div class="nav-version">v2.0.1</div>
+                <div class="nav-version">v2.5.0</div>
            </div>
        </Authorized>
        <NotAuthorized>
@@ -23,12 +23,11 @@
 }

 .nav-brand-text {
+    font-family: 'Cinzel Decorative', 'Cinzel', serif;
    font-size: 1.125rem;
    font-weight: 700;
-    background: var(--accent-gradient);
-    -webkit-background-clip: text;
-    -webkit-text-fill-color: transparent;
-    background-clip: text;
+    letter-spacing: 0.04em;
+    color: var(--text-primary);
 }

 .nav-toggle {
@@ -87,9 +86,10 @@
 }

 .nav-section ::deep .nav-item.active {
-    background: rgba(124, 58, 237, 0.15);
-    color: var(--accent-primary);
-    border: 1px solid rgba(124, 58, 237, 0.2);
+    background: linear-gradient(135deg, rgba(139, 92, 246, 0.15) 0%, rgba(34, 211, 238, 0.08) 100%);
+    color: var(--text-accent);
+    border: 1px solid rgba(139, 92, 246, 0.25);
+    box-shadow: 0 0 12px rgba(139, 92, 246, 0.1);
 }

 .nav-icon {
@@ -145,7 +145,7 @@
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
-    font-family: 'Inter', sans-serif;
+    font-family: 'Jura', sans-serif;
    font-size: 0.8125rem;
    cursor: pointer;
    transition: all var(--transition-normal);
@@ -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 +1,28 @@
+using GmRelay.DiscordBot;
+
+namespace GmRelay.Bot.Tests.Discord;
+
+public sealed class DiscordOptionsTests
+{
+    [Theory]
+    [InlineData(null)]
+    [InlineData("")]
+    [InlineData("   ")]
+    public void Validate_ShouldRejectMissingToken(string? token)
+    {
+        var options = new DiscordOptions { Token = token };
+
+        var exception = Assert.Throws<InvalidOperationException>(options.Validate);
+
+        Assert.Contains("Discord:Token is required", exception.Message);
+        Assert.Contains("Discord__Token", exception.Message);
+    }
+
+    [Fact]
+    public void Validate_ShouldAcceptConfiguredToken()
+    {
+        var options = new DiscordOptions { Token = "configured-token" };
+
+        options.Validate();
+    }
+}
@@ -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}'.");
+    }
+}
@@ -0,0 +1,87 @@
+using System;
+using System.IO;
+
+namespace GmRelay.Bot.Tests.Discord;
+
+public sealed class DiscordProjectStructureTests
+{
+    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 Solution_ShouldIncludeDiscordWorkerProject()
+    {
+        var repoRoot = GetRepoRoot();
+        var solution = File.ReadAllText(Path.Combine(repoRoot, "GM-Relay.slnx"));
+
+        Assert.Contains("src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj", solution);
+    }
+
+    [Fact]
+    public void DiscordWorkerProject_ShouldExistWithoutTelegramDependency()
+    {
+        var repoRoot = GetRepoRoot();
+        var projectPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "GmRelay.DiscordBot.csproj");
+
+        Assert.True(File.Exists(projectPath), "Discord worker project should exist.");
+
+        var project = File.ReadAllText(projectPath);
+        Assert.Contains("Microsoft.NET.Sdk.Worker", project);
+        Assert.Contains("NetCord.Hosting", project);
+        Assert.Contains("GmRelay.ServiceDefaults.csproj", project);
+        Assert.Contains("GmRelay.Shared.csproj", project);
+        Assert.DoesNotContain("Telegram.Bot", project);
+        Assert.DoesNotContain("GmRelay.Bot.csproj", project);
+    }
+
+    [Fact]
+    public void TelegramWorkerProject_ShouldNotReferenceNetCord()
+    {
+        var repoRoot = GetRepoRoot();
+        var project = File.ReadAllText(Path.Combine(repoRoot, "src", "GmRelay.Bot", "GmRelay.Bot.csproj"));
+
+        Assert.DoesNotContain("NetCord", project, StringComparison.OrdinalIgnoreCase);
+    }
+
+    [Fact]
+    public void RuntimeWiring_ShouldIncludeDiscordServiceWithoutCouplingTelegram()
+    {
+        var repoRoot = GetRepoRoot();
+        var compose = File.ReadAllText(Path.Combine(repoRoot, "compose.yaml"));
+        var appHostProject = File.ReadAllText(Path.Combine(repoRoot, "src", "GmRelay.AppHost", "GmRelay.AppHost.csproj"));
+        var appHostProgram = File.ReadAllText(Path.Combine(repoRoot, "src", "GmRelay.AppHost", "Program.cs"));
+        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:2.5.0", 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);
+        Assert.Contains("dotnet build src/GmRelay.DiscordBot/GmRelay.DiscordBot.csproj --no-restore", prChecks);
+        Assert.Contains("GmRelay.DiscordBot.csproj", appHostProject);
+        Assert.Contains("Projects.GmRelay_DiscordBot", appHostProgram);
+    }
+
+    [Fact]
+    public void Version_ShouldBeSynchronizedForDiscordFeatureRelease()
+    {
+        var repoRoot = GetRepoRoot();
+
+        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(
+            "v2.5.0",
+            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}'.");
+    }
+}
@@ -0,0 +1,92 @@
+using System;
+using System.IO;
+
+namespace GmRelay.Bot.Tests.Discord;
+
+public sealed class DiscordStartupTests
+{
+    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 Program_ShouldValidateDiscordTokenBeforeRunning()
+    {
+        var program = ReadProgram();
+
+        Assert.Contains("GetRequiredSection(\"Discord\")", program);
+        Assert.Contains("DiscordOptions", program);
+        Assert.Contains(".Validate()", program);
+    }
+
+    [Fact]
+    public void Program_ShouldRegisterServiceDefaultsAndPostgresDataSource()
+    {
+        var program = ReadProgram();
+
+        Assert.Contains("builder.AddServiceDefaults()", program);
+        Assert.Contains("ConnectionStrings:gmrelaydb is required", program);
+        Assert.Contains("NpgsqlDataSource", program);
+        Assert.Contains("SecretRedactor.RedactConnectionString", program);
+    }
+
+    [Fact]
+    public void Program_ShouldRegisterNetCordGatewayApplicationCommandsAndComponents()
+    {
+        var program = ReadProgram();
+
+        Assert.Contains(".AddDiscordGateway", program);
+        Assert.Contains(".AddApplicationCommands", program);
+        Assert.Contains(".AddComponentInteractions", program);
+        Assert.Contains(".AddGatewayHandlers", program);
+        Assert.Contains("AddSlashCommand", program);
+    }
+
+    [Fact]
+    public void LifecycleLogger_ShouldLogGatewayLifecycleEventsWithoutTokenValues()
+    {
+        var repoRoot = GetRepoRoot();
+        var loggerPath = Path.Combine(
+            repoRoot,
+            "src",
+            "GmRelay.DiscordBot",
+            "Infrastructure",
+            "Logging",
+            "DiscordGatewayLifecycleLogger.cs");
+
+        Assert.True(File.Exists(loggerPath), "Discord gateway lifecycle logger should exist.");
+
+        var logger = File.ReadAllText(loggerPath);
+        Assert.Contains("IReadyGatewayHandler", logger);
+        Assert.Contains("IDisconnectGatewayHandler", logger);
+        Assert.Contains("IResumeGatewayHandler", logger);
+        Assert.Contains("LogInformation", logger);
+        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();
+        return File.ReadAllText(Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Program.cs"));
+    }
+}
@@ -0,0 +1,47 @@
+using GmRelay.Shared.Features.Sessions.CreateSession;
+using GmRelay.Shared.Platform;
+
+namespace GmRelay.Bot.Tests.Features.Sessions.CreateSession;
+
+public sealed class PlatformNeutralSessionInteractionCommandTests
+{
+    [Fact]
+    public void JoinSessionCommand_ShouldExposePlatformNeutralInteractionContext()
+    {
+        AssertProperty<JoinSessionCommand>("SessionId", typeof(Guid));
+        AssertProperty<JoinSessionCommand>("User", typeof(PlatformUser));
+        AssertProperty<JoinSessionCommand>("InteractionId", typeof(string));
+        AssertProperty<JoinSessionCommand>("Group", typeof(PlatformGroup));
+        AssertProperty<JoinSessionCommand>("ScheduleMessage", typeof(PlatformMessageRef));
+        AssertNoTelegramSpecificProperties<JoinSessionCommand>();
+    }
+
+    [Fact]
+    public void LeaveSessionCommand_ShouldExposePlatformNeutralInteractionContext()
+    {
+        AssertProperty<LeaveSessionCommand>("SessionId", typeof(Guid));
+        AssertProperty<LeaveSessionCommand>("User", typeof(PlatformUser));
+        AssertProperty<LeaveSessionCommand>("InteractionId", typeof(string));
+        AssertProperty<LeaveSessionCommand>("Group", typeof(PlatformGroup));
+        AssertProperty<LeaveSessionCommand>("ScheduleMessage", typeof(PlatformMessageRef));
+        AssertNoTelegramSpecificProperties<LeaveSessionCommand>();
+    }
+
+    private static void AssertProperty<T>(string name, Type expectedType)
+    {
+        var property = Assert.Single(typeof(T).GetProperties(), property => property.Name == name);
+
+        Assert.Equal(expectedType, property.PropertyType);
+    }
+
+    private static void AssertNoTelegramSpecificProperties<T>()
+    {
+        var names = typeof(T).GetProperties().Select(property => property.Name).ToArray();
+
+        Assert.DoesNotContain(names, name => name.Contains("Telegram", StringComparison.Ordinal));
+        Assert.DoesNotContain("ChatId", names);
+        Assert.DoesNotContain("MessageId", names);
+        Assert.DoesNotContain("TelegramUserId", names);
+        Assert.DoesNotContain("TelegramUsername", names);
+    }
+}
@@ -0,0 +1,81 @@
+namespace GmRelay.Bot.Tests.Features.Sessions.CreateSession;
+
+public sealed class PlatformNeutralSessionInteractionSqlTests
+{
+    [Fact]
+    public async Task JoinSessionHandler_ShouldPersistPlayersByPlatformIdentity()
+    {
+        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);
+        Assert.Contains("ExternalUserId", handler, StringComparison.Ordinal);
+        Assert.Contains("ExternalUsername", handler, StringComparison.Ordinal);
+        Assert.DoesNotContain("TelegramPlatformIds.", handler, StringComparison.Ordinal);
+        Assert.DoesNotContain("command.TelegramUserId", handler, StringComparison.Ordinal);
+        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.Shared/Features/Sessions/CreateSession/LeaveSessionHandler.cs");
+
+        Assert.Contains("p.platform = @Platform", handler, StringComparison.Ordinal);
+        Assert.Contains("p.external_user_id = @ExternalUserId", handler, StringComparison.Ordinal);
+        Assert.DoesNotContain("p.telegram_id = @TelegramUserId", handler, StringComparison.Ordinal);
+        Assert.DoesNotContain("TelegramPlatformIds.", handler, StringComparison.Ordinal);
+        Assert.DoesNotContain("command.TelegramUserId", handler, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public async Task SessionInteractionHandlers_ShouldUpdateSchedulesThroughCommandMessageReference()
+    {
+        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);
+        Assert.Contains("command.ScheduleMessage", joinHandler, StringComparison.Ordinal);
+        Assert.Contains("new PlatformScheduleMessage(", leaveHandler, StringComparison.Ordinal);
+        Assert.Contains("command.Group", leaveHandler, StringComparison.Ordinal);
+        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);
+        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}'.");
+    }
+}
@@ -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.");
+    }
+}
@@ -25,6 +25,7 @@

  <ItemGroup>
    <ProjectReference Include="..\..\src\GmRelay.Bot\GmRelay.Bot.csproj" />
+    <ProjectReference Include="..\..\src\GmRelay.DiscordBot\GmRelay.DiscordBot.csproj" />
    <ProjectReference Include="..\..\src\GmRelay.Web\GmRelay.Web.csproj" />
  </ItemGroup>

@@ -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);
@@ -99,6 +99,15 @@ public sealed class PlatformIdentityMigrationTests
        Assert.Contains("external_username", statsMigration, StringComparison.Ordinal);
    }

+    [Fact]
+    public async Task MigrationV017_ShouldAllowPlayersWithoutLegacyTelegramId()
+    {
+        var migration = await ReadRepositoryFileAsync("src/GmRelay.Bot/Migrations/V017__allow_platform_neutral_players.sql");
+
+        Assert.Contains("ALTER TABLE players", migration, StringComparison.Ordinal);
+        Assert.Contains("telegram_id DROP NOT NULL", migration, StringComparison.Ordinal);
+    }
+
    private static async Task<string> ReadRepositoryFileAsync(string relativePath)
    {
        var directory = new DirectoryInfo(AppContext.BaseDirectory);
@@ -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
+    }
+}
@@ -202,6 +202,36 @@
          "Newtonsoft.Json": "13.0.3"
        }
      },
+      "NetCord": {
+        "type": "Transitive",
+        "resolved": "1.0.0-alpha.489",
+        "contentHash": "/rM73l1pwwJCWHi7YrIiSVc+GVL0lV+k+amqNJUMINjLO+c5bKWj9PoNNoMhiPZoaORO4k6Uxp8EQfoQj3AYtA=="
+      },
+      "NetCord.Hosting": {
+        "type": "Transitive",
+        "resolved": "1.0.0-alpha.489",
+        "contentHash": "yQcvgY3uu98ndoLXpiFhJ5kungoWVLd7xnO18GmukRPVsRzyOKgxe/Ycp8DLYTtiQG9Wyg1pV4Iv6rvo+zck4w==",
+        "dependencies": {
+          "NetCord": "1.0.0-alpha.489"
+        }
+      },
+      "NetCord.Hosting.Services": {
+        "type": "Transitive",
+        "resolved": "1.0.0-alpha.489",
+        "contentHash": "Md46+zLB9UWYLM7PVlATytkjAC9602wBNKO7m5eaBiDdEvZOPsUrR6NJJr2YtJoKjttbvhte5ayDXj8WGGsevQ==",
+        "dependencies": {
+          "NetCord.Hosting": "1.0.0-alpha.489",
+          "NetCord.Services": "1.0.0-alpha.489"
+        }
+      },
+      "NetCord.Services": {
+        "type": "Transitive",
+        "resolved": "1.0.0-alpha.489",
+        "contentHash": "SwG/7Khba1uRENDvG22RV/POByIwh/ZrenMrSzwoEcEYPMI5TabmEEB3ySH15XGdLcFZJEj106AlriN0kZhfFg==",
+        "dependencies": {
+          "NetCord": "1.0.0-alpha.489"
+        }
+      },
      "Newtonsoft.Json": {
        "type": "Transitive",
        "resolved": "13.0.3",
@@ -362,13 +392,26 @@
          "Aspire.Npgsql": "[13.2.2, )",
          "Dapper": "[2.1.72, )",
          "Dapper.AOT": "[1.0.48, )",
-          "GmRelay.ServiceDefaults": "[1.15.1, )",
-          "GmRelay.Shared": "[1.15.1, )",
+          "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, )"
        }
      },
+      "gmrelay.discordbot": {
+        "type": "Project",
+        "dependencies": {
+          "Aspire.Npgsql": "[13.2.2, )",
+          "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, )"
+        }
+      },
      "gmrelay.servicedefaults": {
        "type": "Project",
        "dependencies": {
@@ -382,15 +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": "[1.15.1, )",
-          "GmRelay.Shared": "[1.15.1, )",
+          "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
Toutsu	745a65818d	Merge pull request #83 : feat: add Discord NetCord gateway worker Deploy Telegram Bot / build-and-push (push) Successful in 4m9s Details Deploy Telegram Bot / scan-images (push) Successful in 1m6s Details Deploy Telegram Bot / deploy (push) Successful in 12s Details	2026-05-18 16:11:25 +03:00
Toutsu	05ca8061e9	feat: add Discord NetCord gateway worker PR Checks / test-and-build (pull_request) Successful in 5m46s Details Add a separate GmRelay.DiscordBot worker using NetCord Gateway with startup token validation, PostgreSQL datasource registration, slash-command setup, component interaction service registration, and lifecycle logging. Wire the Discord service through Aspire AppHost, Docker Compose, PR checks, deploy image build/push/scan/pull steps, README docs, and synchronized version 2.2.0. Add TDD coverage for project isolation, token validation, startup wiring, runtime wiring, and version synchronization. Bump version -> 2.2.0	2026-05-18 16:04:31 +03:00
Toutsu	ab59d234f3	Merge pull request #82 : refactor: make session join leave platform-neutral Deploy Telegram Bot / build-and-push (push) Successful in 3m45s Details Deploy Telegram Bot / scan-images (push) Successful in 1m0s Details Deploy Telegram Bot / deploy (push) Successful in 11s Details	2026-05-18 13:38:22 +03:00
Toutsu	e791fc2f4a	refactor: make session join leave platform-neutral PR Checks / test-and-build (pull_request) Successful in 5m3s Details Convert join/leave interaction commands to PlatformUser, PlatformGroup, and PlatformMessageRef. Persist and look up participants by platform identity while keeping Telegram callbacks intact. Add V017 migration and TDD coverage. Bump version to 2.1.1.	2026-05-18 13:30:48 +03:00
Toutsu	cb515b0e05	Merge pull request #81 : feat: refresh dashboard design with fantasy RPG aesthetic Deploy Telegram Bot / build-and-push (push) Successful in 3m57s Details Deploy Telegram Bot / scan-images (push) Successful in 1m4s Details Deploy Telegram Bot / deploy (push) Successful in 11s Details 🎨 Dashboard design refresh - Complete fantasy RPG aesthetic overhaul - Glass-morphism cards with gradient borders - Cinzel + Jura typography - Atmospheric backgrounds with noise texture 🧹 Chore: migrated k8s manifests to gmrelay-k8s repo Bump version → 2.1.0 Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>	2026-05-18 11:29:16 +03:00
Toutsu	cea6ec801a	chore: bump version to 2.1.0 PR Checks / test-and-build (pull_request) Successful in 5m11s Details Synchronize version across all 4 files: - Directory.Build.props - compose.yaml (bot + web images) - .gitea/workflows/deploy.yml - NavMenu.razor Bump version → 2.1.0 Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>	2026-05-18 11:22:00 +03:00
Toutsu	8e57f8b07a	chore: migrate k8s manifests to dedicated repo PR Checks / test-and-build (pull_request) Successful in 5m11s Details All Kubernetes manifests moved to git.codeanddice.ru/Toutsu/gmrelay-k8s. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>	2026-05-18 11:04:22 +03:00
Toutsu	e837e191c2	feat: refresh dashboard design with fantasy RPG aesthetic - Replace Inter font with Cinzel (headings) + Jura (body) - Deepen dark background palette with atmospheric gradient orbs - Add subtle noise texture overlay for depth - Refine glass cards with animated gradient border glow on hover - Sharpen accent colors: violet #8b5cf6 + cyan #22d3ee - Improve button tactile feedback and shadow system - Add k8s manifests for minikube local deployment Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>	2026-05-18 09:54:56 +03:00