feat: NCS-121 pipeline for tournament (#68)

Image for Tournment

---------

Co-authored-by: Lala, Shahd <Shahd.Lala@sybit.de>
Reviewed-on: #68

.claude/commands/create-defect.md

@@ -0,0 +1,88 @@
+# Create Defect in YouTrack
+
+Automated defect creation workflow. Topic/hint: `$ARGUMENTS`
+
+## Step 1 — Gather Context
+
+Use `AskUserQuestion` tool to ask the user (max 4 questions at once):
+
+1. **Component** — Where does the bug occur? (e.g. move generation, FEN parsing, castling, UI, API)
+2. **What breaks** — What is the actual (broken) behavior?
+3. **Expected** — What should happen instead?
+4. **Reproducibility** — Is it always reproducible? Any known trigger conditions?
+
+If `$ARGUMENTS` already answers some of these, skip those questions.
+
+## Step 2 — Research (if needed)
+
+If the bug involves domain logic or rules:
+- Search repo for relevant code (`Grep`/`Bash`).
+- Check test files for existing coverage of the broken area.
+- Do NOT guess at root cause. Surface findings before drafting.
+
+## Step 3 — Draft Defect
+
+Compose the full defect report using this template:
+
+```
+Summary
+
+[One-sentence description of what is broken.]
+
+
+Steps to Reproduce
+
+1. Step one
+2. Step two
+3. Step three
+
+
+Expected Behavior
+
+[What should happen.]
+
+
+Actual Behavior
+
+[What actually happens.]
+
+
+Environment / Notes
+
+[Any relevant context: FEN positions, game conditions, config, browser, OS — only if applicable.]
+```
+
+Rules:
+- Steps must be minimal and reproducible.
+- Expected vs actual: concrete and unambiguous.
+- Omit "Environment / Notes" section if not relevant.
+
+## Step 4 — Clarify
+
+Show the draft to the user.
+**Use `AskUserQuestion` tool to ask:**
+- Are steps to reproduce complete and accurate?
+- Severity: Blocker / Critical / Major / Minor / Trivial?
+- Any related tickets or recent changes to link?
+
+Incorporate feedback. Repeat until user approves.
+
+## Step 5 — Determine Project
+
+- Frontend / UI / UX → project: `NCWF`
+- Backend / coordinator / systems / bot / engine → project: `NCS`
+
+If ambiguous, ask the user.
+
+## Step 6 — Create Issue
+
+Call `mcp__youtrack__create_issue` with:
+- `project`: determined in Step 5
+- `summary`: concise title describing what is broken (≤72 chars, sentence case)
+- `description`: full formatted defect report from Step 3 (Markdown)
+- `type`: `Bug`
+
+## Step 7 — Report
+
+Display the created issue ID and URL.
+Ask if a linked investigation or fix task is needed.

.claude/commands/create-story.md

@@ -66,10 +66,17 @@ Incorporate feedback. Repeat until user approves.
 
 ## Step 5 — Determine Project
 
+> **Project routing rules (always apply these):**
+> - Backend code (game engine, bots, API, services, coordinator) → `NCS`
+> - Frontend code (UI, UX, web app) → `NCWF`
+> - Infrastructure (Kubernetes, pipelines, CI/CD, DB setup, cloud infra) → `NCI`
+> - If ambiguous, ask the user.
+
 - Frontend / UI / UX → project: `NCWF`
 - Backend / coordinator / systems / bot / engine → project: `NCS`
+- Kubernetes, pipelines, CI/CD, DB setup, infrastructure → project: `NCI`
 
-If ambiguous, ask the user.
+If still ambiguous, ask the user.
 
 ## Step 6 — Create Issue
 
@@ -79,7 +86,27 @@ Call `mcp__youtrack__create_issue` with:
 - `description`: full formatted story from Step 3 (Markdown)
 - `type`: `Feature` (or `Task` if purely technical with no user-facing value)
 
-## Step 7 — Report
+## Step 7 — Link Issues
+
+After creation, **automatically** ask the user (use `AskUserQuestion` if interactive, otherwise infer from context):
+
+> Are there related issues to link? (skip if none)
+
+Collect any issue IDs the user mentions. For each, determine the correct relation and call `mcp__youtrack__link_issues`:
+
+| Situation | Relation to use |
+|-----------|----------------|
+| This story must be done before another | `blocks` |
+| Another story must be done before this | `is blocked by` |
+| Stories share domain or are related | `relates to` |
+| This is a child of an epic/story | `subtask of` |
+| This is a parent grouping subtasks | `parent for` |
+| This depends on another ticket's output | `depends on` |
+
+If the user mentions an issue in the story description or implementation notes (e.g. "see NCS-42", "after NCS-12 is done"), auto-detect and suggest linking it — confirm before creating the link.
+
+## Step 8 — Report
 
 Display the created issue ID and URL.
+List any links created (relation type + linked issue ID).
 Ask if a linked sub-task or implementation ticket is needed.

.claude/commands/fix-defect.md

@@ -39,12 +39,16 @@ After root cause confirmed, assess scope:
 To create subtasks:
 1. Break fix into discrete, independently-completable tasks (e.g. "Fix validation in RuleSet", "Add regression test for castling edge case", "Update FenParser to handle X").
 2. For each subtask call `mcp__youtrack__create_issue` with:
-   - `project`: same project as parent ticket
+   - `project`: based on subtask content — do **not** inherit from parent. Backend code → `NCS`; frontend/UI → `NCWF`; Kubernetes/pipelines/CI-CD/DB setup/infrastructure → `NCI`. If ambiguous, ask user.
    - `summary`: concise action-oriented title
    - `type`: `Task`
    - `description`: what to do and why
 3. Call `mcp__youtrack__link_issues` to link each subtask to `$ARGUMENTS` with relation `subtask of`.
-4. List created subtask IDs to user.
+4. Check if the ticket description or comments mention other issue IDs. For each mentioned ID, suggest a link and confirm with user:
+   - Fix depends on another fix finishing first → `is blocked by`
+   - This fix blocks another ticket → `blocks`
+   - Logically related but independent → `relates to`
+5. List created subtask IDs and any additional links to user.
 
 Then proceed to Step 4, implementing subtasks in order.
 
@@ -53,7 +57,10 @@ Then proceed to Step 4, implementing subtasks in order.
 1. Implement fix (use `scala-implementer` agent for non-trivial changes; inline edits for small ones).
 2. Run `./compile` — must be green.
 3. Run `./test` — must be green.
-4. Run `./lint` — must be green.
+4. Run `./gradlew spotlessScalaApply` — **blocking, foreground only**. Wait for completion before continuing.
+5. Run `./lint` — **blocking, foreground only** (never `run_in_background`). Wait for exit code 0. Must be green.
+   - If lint fails, fix all issues and re-run until exit code 0.
+   - **Do NOT proceed to Step 5 until `./lint` has completed and returned exit code 0.**
 If any step fails, iterate until all pass.
 
 ## Step 5 — Review
@@ -61,6 +68,19 @@ If any step fails, iterate until all pass.
 Spawn `cavecrew-reviewer` on the full diff.
 Display findings grouped by severity.
 
+## Step 5b — Apply Review Findings
+
+If the review produced any findings (any severity):
+1. Implement all agreed fixes.
+2. Run `./compile` — must be green.
+3. Run `./test` — must be green.
+4. Run `./gradlew spotlessScalaApply` — **blocking, foreground only**. Wait for completion.
+5. Run `./lint` — **blocking, foreground only**. Wait for exit code 0.
+   - If lint fails, fix all issues and re-run until exit code 0.
+6. Re-spawn `cavecrew-reviewer` on the updated diff to confirm all findings are resolved.
+
+Repeat until review is clean or user explicitly accepts remaining findings.
+
 ## Step 6 — Confirm + Push
 
 Show summary: ticket, branch, files changed, review findings.
@@ -98,7 +118,23 @@ Files changed:
 - <file2>
 ```
 
+## Step 7b — Additional Links
+
+After commenting, ask the user if `$ARGUMENTS` should be linked to any other issues not already linked:
+
+| Situation | Relation |
+|-----------|---------|
+| This fix blocks another open ticket | `blocks` |
+| Another ticket must ship first | `is blocked by` |
+| Related defect or story | `relates to` |
+| Duplicate of another defect | `duplicates` |
+
+Scan the ticket description and comments for any issue IDs that were mentioned but not yet linked. Suggest those automatically.
+
+Call `mcp__youtrack__link_issues` for each confirmed link.
+
 ## Step 8 — Cleanup
 
-Call `ExitWorktree` to delete the worktree.
-Report: branch pushed, ticket commented, worktree deleted, done.
+Call `ExitWorktree` with `discard_changes: true` to delete the worktree.
+(Branch was pushed in step 6 — commits are safe on remote; `discard_changes: true` bypasses the local-ahead guard.)
+Report: branch pushed, ticket commented, links created, worktree deleted, done.

.claude/commands/implement-feature.md

@@ -33,7 +33,10 @@ All subsequent file work happens inside this worktree.
 1. Implement feature (use `scala-implementer` agent for non-trivial changes; inline edits for small ones).
 2. Run `./compile` — must be green.
 3. Run `./test` — must be green (add new tests for new behaviour; do not modify existing tests unless requirements changed).
-4. Run `./lint` — must be green.
+4. Run `./gradlew spotlessScalaApply` — **blocking, foreground only**. Wait for completion before continuing.
+5. Run `./lint` — **blocking, foreground only** (never `run_in_background`). Wait for exit code 0. Must be green.
+   - If lint fails, fix all issues and re-run until exit code 0.
+   - **Do NOT proceed to Step 5 until `./lint` has completed and returned exit code 0.**
 If any step fails, iterate until all pass.
 
 ## Step 5 — Review
@@ -41,6 +44,19 @@ If any step fails, iterate until all pass.
 Spawn `cavecrew-reviewer` on the full diff.
 Display findings grouped by severity.
 
+## Step 5b — Apply Review Findings
+
+If the review produced any findings (any severity):
+1. Implement all agreed fixes.
+2. Run `./compile` — must be green.
+3. Run `./test` — must be green.
+4. Run `./gradlew spotlessScalaApply` — **blocking, foreground only**. Wait for completion.
+5. Run `./lint` — **blocking, foreground only**. Wait for exit code 0.
+   - If lint fails, fix all issues and re-run until exit code 0.
+6. Re-spawn `cavecrew-reviewer` on the updated diff to confirm all findings are resolved.
+
+Repeat until review is clean or user explicitly accepts remaining findings.
+
 ## Step 6 — Confirm + Push
 
 Show summary: ticket, branch, files changed, review findings.
@@ -80,5 +96,6 @@ Files changed:
 
 ## Step 8 — Cleanup
 
-Call `ExitWorktree` to delete the worktree.
+Call `ExitWorktree` with `discard_changes: true` to delete the worktree.
+(Branch was pushed in step 6 — commits are safe on remote; `discard_changes: true` bypasses the local-ahead guard.)
 Report: branch pushed, ticket commented, worktree deleted, done.

.claude/commands/split-story.md

@@ -59,11 +59,15 @@ Rules:
 - Definition of Done: adjust per subtask — not all subtasks need the same criteria (e.g. a research spike has different DoD than an implementation task).
 - Keep description short — one paragraph max.
 
-## Step 5 — Determine Project
+## Step 5 — Determine Project per Subtask
 
-Inherit project from parent story (`$ARGUMENTS`):
-- If parent is `NCWF-*` → subtasks go in `NCWF`
-- If parent is `NCS-*` → subtasks go in `NCS`
+Assign each subtask's project based on its content — do **not** inherit blindly from parent:
+
+- Backend code (game engine, bots, API, services, coordinator) → `NCS`
+- Frontend code (UI, UX, web app) → `NCWF`
+- Kubernetes, pipelines, CI/CD, DB setup, infrastructure → `NCI`
+
+If a subtask's project is ambiguous, ask the user before creating it.
 
 ## Step 6 — Create Subtasks
 
@@ -75,8 +79,31 @@ For each subtask call `mcp__youtrack__create_issue` with:
 
 Then call `mcp__youtrack__link_issues` to link each created subtask to `$ARGUMENTS` with relation `subtask of`.
 
+## Step 6b — Inter-Subtask Links
+
+If subtasks must be done in sequence (one depends on output of another), add ordering links:
+- For each dependency pair call `mcp__youtrack__link_issues` with relation `is blocked by` (subtask B is blocked by subtask A).
+
+Ask the user to confirm sequencing before adding these links:
+
+> Do any subtasks have ordering dependencies? (e.g. "Implement X must come before Add tests for X")
+
+## Step 6c — External Links
+
+Scan `$ARGUMENTS` description and implementation notes for any referenced issue IDs not already linked. For each:
+
+| Situation | Relation |
+|-----------|---------|
+| Parent story blocks another epic/story | `blocks` |
+| Story depends on another epic completing | `is blocked by` |
+| Related story in same domain | `relates to` |
+| This story duplicates or supersedes | `duplicates` |
+
+Suggest links to the user and call `mcp__youtrack__link_issues` on confirmation.
+
 ## Step 7 — Report
 
 List all created subtask IDs and summaries.
+List all links created (subtask-of, blocking chains, external).
 Display parent story link.
 Ask if any subtask needs further splitting.

.github/workflows/native-image.yml

@@ -56,6 +56,7 @@ jobs:
           - official-bots
           - rule
           - store
+          - tournament
           - ws
         arch:
           - name: default

.gitignore

@@ -48,3 +48,13 @@ graphify-out/
 .DS_Store
 /jacoco-reporter/.venv/
 /.claude/settings.local.json
+/.claude/worktrees/
+modules/tournament/src/main/resources/keys/dev-public.pem
+modules/account/src/main/resources/keys/dev-private.pem
+modules/account/src/main/resources/keys/dev-public.pem
+modules/core/src/main/resources/keys/dev-public.pem
+*.hprof
+
+### Embedded repos (not submodules) ###
+GitOps/
+frontend/

CLAUDE.md

@@ -57,6 +57,14 @@ Use consistently.
 - **Tests are the spec.** Don't modify to pass. Fix requirements/code. Update only if requirements change.
 - Never read build folders. Ask permission if needed.
 - Keep file current with decisions + conventions.
+- **NativeReflectionConfig (mandatory):** Every new type (class, case class, enum, sealed trait — anything serialized) must be registered in the `NativeReflectionConfig` of **every module that interacts with it**. Configs live at:
+  - `modules/account/src/main/scala/de/nowchess/account/config/NativeReflectionConfig.scala`
+  - `modules/coordinator/src/main/scala/de/nowchess/coordinator/config/NativeReflectionConfig.scala`
+  - `modules/core/src/main/scala/de/nowchess/chess/config/NativeReflectionConfig.scala`
+  - `modules/io/src/main/scala/de/nowchess/io/service/config/NativeReflectionConfig.scala`
+  - `modules/rule/src/main/scala/de/nowchess/rules/config/NativeReflectionConfig.scala`
+  - `modules/store/src/main/scala/de/nowchess/store/config/NativeReflectionConfig.scala`
+  - `modules/ws/src/main/scala/de/nowchess/ws/config/NativeReflectionConfig.scala`
 
 ---
 

docs/tournament-openapi.yaml

@@ -0,0 +1,623 @@
+openapi: 3.0.3
+info:
+  title: NowChess Tournament API
+  description: |
+    Swiss-system bot tournaments, modelled after the Lichess API style.
+
+    Game moves flow through the existing board and bot endpoints — this module
+    handles pairings, standings, and lifecycle only.
+
+    ## Streaming
+    Endpoints marked **NDJSON** return newline-delimited JSON objects
+    (`application/x-ndjson`). Each line is one complete JSON object. The
+    connection stays open until the tournament or round ends.
+
+    ## Bot flow
+    ```
+    POST /api/tournament                       # create
+    POST /api/tournament/{id}/join             # each bot joins
+    POST /api/tournament/{id}/start            # director starts
+
+    GET  /api/tournament/{id}/stream  (NDJSON) # open before start
+
+    -- per round --
+    receive gameStart { gameId, color }
+    GET  /bot/stream/game/{gameId}    (existing, NDJSON)
+    POST /bot/game/{gameId}/move/{uci}         (existing)
+    -- repeat --
+
+    GET  /api/tournament/{id}/results (NDJSON) # final standings
+    ```
+  version: 1.0.0
+
+servers:
+  - url: https://st.nowchess.janis-eccarius.de
+    description: Staging
+  - url: https://nowchess.janis-eccarius.de
+    description: Production
+  - url: http://localhost:8086
+    description: Local
+
+security:
+  - bearerAuth: []
+
+tags:
+  - name: Tournament
+    description: Tournament lifecycle
+  - name: Participation
+    description: Join and withdraw
+  - name: Results
+    description: Standings, pairings, and game export
+  - name: Stream
+    description: NDJSON event streams
+
+paths:
+
+  /api/tournament:
+    get:
+      tags: [Tournament]
+      summary: Get current tournaments
+      description: Returns tournaments grouped by status. No auth required.
+      security: []
+      responses:
+        "200":
+          description: Tournaments by status
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  created:
+                    type: array
+                    items:
+                      $ref: "#/components/schemas/TournamentInfo"
+                  started:
+                    type: array
+                    items:
+                      $ref: "#/components/schemas/TournamentInfo"
+                  finished:
+                    type: array
+                    items:
+                      $ref: "#/components/schemas/TournamentInfo"
+
+    post:
+      tags: [Tournament]
+      summary: Create a new tournament
+      description: The authenticated user becomes the tournament director.
+      requestBody:
+        required: true
+        content:
+          application/x-www-form-urlencoded:
+            schema:
+              $ref: "#/components/schemas/CreateTournamentForm"
+      responses:
+        "201":
+          description: Tournament created
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Tournament"
+        "400":
+          $ref: "#/components/responses/BadRequest"
+        "401":
+          $ref: "#/components/responses/Unauthorized"
+
+  /api/tournament/{id}:
+    parameters:
+      - $ref: "#/components/parameters/id"
+
+    get:
+      tags: [Tournament]
+      summary: Get a tournament
+      description: Includes the first page of standings in the `standing` field.
+      security: []
+      responses:
+        "200":
+          description: Tournament with embedded standings
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Tournament"
+        "404":
+          $ref: "#/components/responses/NotFound"
+
+    delete:
+      tags: [Tournament]
+      summary: Terminate a tournament
+      description: Only the director may terminate. Only allowed while status is `created`.
+      responses:
+        "204":
+          description: Terminated
+        "401":
+          $ref: "#/components/responses/Unauthorized"
+        "403":
+          $ref: "#/components/responses/Forbidden"
+        "404":
+          $ref: "#/components/responses/NotFound"
+        "409":
+          $ref: "#/components/responses/Conflict"
+
+  /api/tournament/{id}/start:
+    parameters:
+      - $ref: "#/components/parameters/id"
+
+    post:
+      tags: [Tournament]
+      summary: Start the tournament
+      description: |
+        Only the director may start. Requires at least 2 joined bots.
+        Computes round 1 pairings and creates games via `POST /api/board/game`.
+      responses:
+        "200":
+          description: Tournament started
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Tournament"
+        "401":
+          $ref: "#/components/responses/Unauthorized"
+        "403":
+          $ref: "#/components/responses/Forbidden"
+        "404":
+          $ref: "#/components/responses/NotFound"
+        "409":
+          $ref: "#/components/responses/Conflict"
+
+  /api/tournament/{id}/join:
+    parameters:
+      - $ref: "#/components/parameters/id"
+
+    post:
+      tags: [Participation]
+      summary: Join a tournament
+      description: |
+        Register the authenticated bot for the tournament. Only allowed while
+        status is `created`. The token subject must be a bot account.
+      responses:
+        "200":
+          description: Ok
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Ok"
+        "401":
+          $ref: "#/components/responses/Unauthorized"
+        "403":
+          $ref: "#/components/responses/Forbidden"
+        "404":
+          $ref: "#/components/responses/NotFound"
+        "409":
+          $ref: "#/components/responses/Conflict"
+
+  /api/tournament/{id}/withdraw:
+    parameters:
+      - $ref: "#/components/parameters/id"
+
+    post:
+      tags: [Participation]
+      summary: Withdraw from a tournament
+      description: Only allowed while status is `created`.
+      responses:
+        "200":
+          description: Ok
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Ok"
+        "401":
+          $ref: "#/components/responses/Unauthorized"
+        "403":
+          $ref: "#/components/responses/Forbidden"
+        "404":
+          $ref: "#/components/responses/NotFound"
+        "409":
+          $ref: "#/components/responses/Conflict"
+
+  /api/tournament/{id}/results:
+    parameters:
+      - $ref: "#/components/parameters/id"
+
+    get:
+      tags: [Results]
+      summary: Get results as NDJSON stream
+      description: |
+        Streams one `Result` object per line, sorted by rank ascending.
+        Available at any point during or after the tournament.
+      security: []
+      parameters:
+        - name: nb
+          in: query
+          description: Max number of results to stream (default all)
+          schema:
+            type: integer
+            minimum: 1
+      responses:
+        "200":
+          description: NDJSON stream of results
+          content:
+            application/x-ndjson:
+              schema:
+                $ref: "#/components/schemas/Result"
+        "404":
+          $ref: "#/components/responses/NotFound"
+
+  /api/tournament/{id}/round/{round}:
+    parameters:
+      - $ref: "#/components/parameters/id"
+      - name: round
+        in: path
+        required: true
+        schema:
+          type: integer
+          minimum: 1
+
+    get:
+      tags: [Results]
+      summary: Get pairings for a round
+      security: []
+      responses:
+        "200":
+          description: Pairings for the specified round
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  round:
+                    type: integer
+                    example: 2
+                  pairings:
+                    type: array
+                    items:
+                      $ref: "#/components/schemas/Pairing"
+        "404":
+          $ref: "#/components/responses/NotFound"
+
+  /api/tournament/{id}/export/games:
+    parameters:
+      - $ref: "#/components/parameters/id"
+
+    get:
+      tags: [Results]
+      summary: Export all games
+      description: |
+        Returns all games of the tournament. Accepts both PGN and NDJSON via
+        the `Accept` header.
+      security: []
+      parameters:
+        - name: Accept
+          in: header
+          schema:
+            type: string
+            enum:
+              - application/x-chess-pgn
+              - application/x-ndjson
+            default: application/x-chess-pgn
+      responses:
+        "200":
+          description: Games in the requested format
+          content:
+            application/x-chess-pgn:
+              schema:
+                type: string
+                description: Standard PGN, one game per block
+            application/x-ndjson:
+              schema:
+                $ref: "#/components/schemas/GameExport"
+        "404":
+          $ref: "#/components/responses/NotFound"
+
+  /api/tournament/{id}/stream:
+    parameters:
+      - $ref: "#/components/parameters/id"
+
+    get:
+      tags: [Stream]
+      summary: Stream tournament events
+      description: |
+        NDJSON stream scoped to one tournament. Keep this connection open for
+        the full tournament lifetime.
+
+        On `gameStart` the bot connects to the existing bot endpoints:
+        - `GET /bot/stream/game/{gameId}` — stream game state (existing)
+        - `POST /bot/game/{gameId}/move/{uci}` — submit moves (existing)
+      responses:
+        "200":
+          description: NDJSON event stream
+          content:
+            application/x-ndjson:
+              schema:
+                $ref: "#/components/schemas/TournamentEvent"
+        "401":
+          $ref: "#/components/responses/Unauthorized"
+        "404":
+          $ref: "#/components/responses/NotFound"
+
+components:
+
+  securitySchemes:
+    bearerAuth:
+      type: http
+      scheme: bearer
+      bearerFormat: JWT
+
+  parameters:
+    id:
+      name: id
+      in: path
+      required: true
+      schema:
+        type: string
+      example: t7kXq2
+
+  schemas:
+
+    Clock:
+      type: object
+      required: [limit, increment]
+      properties:
+        limit:
+          type: integer
+          description: Base time in seconds
+          example: 300
+        increment:
+          type: integer
+          description: Increment per move in seconds
+          example: 3
+
+    Variant:
+      type: object
+      properties:
+        key:
+          type: string
+          example: standard
+        name:
+          type: string
+          example: Standard
+
+    BotRef:
+      type: object
+      properties:
+        id:
+          type: string
+          example: bot_abc
+        name:
+          type: string
+          example: StockfishClone
+
+    Standing:
+      type: object
+      properties:
+        page:
+          type: integer
+          example: 1
+        players:
+          type: array
+          items:
+            $ref: "#/components/schemas/Result"
+
+    TournamentInfo:
+      description: Lightweight tournament summary used in list responses.
+      type: object
+      properties:
+        id:
+          type: string
+          example: t7kXq2
+        fullName:
+          type: string
+          example: Friday Night Bots Swiss
+        clock:
+          $ref: "#/components/schemas/Clock"
+        variant:
+          $ref: "#/components/schemas/Variant"
+        rated:
+          type: boolean
+          example: true
+        nbPlayers:
+          type: integer
+          example: 8
+        nbRounds:
+          type: integer
+          example: 5
+        createdBy:
+          type: string
+          example: userId
+        startsAt:
+          type: string
+          format: date-time
+
+    Tournament:
+      allOf:
+        - $ref: "#/components/schemas/TournamentInfo"
+        - type: object
+          properties:
+            status:
+              type: string
+              enum: [created, started, finished]
+              example: started
+            round:
+              type: integer
+              description: Current round number
+              example: 2
+            standing:
+              $ref: "#/components/schemas/Standing"
+            winner:
+              description: Present only when status is `finished`
+              allOf:
+                - $ref: "#/components/schemas/BotRef"
+              nullable: true
+
+    CreateTournamentForm:
+      type: object
+      required: [name, nbRounds, clockLimit, clockIncrement]
+      properties:
+        name:
+          type: string
+          example: Friday Night Bots
+        nbRounds:
+          type: integer
+          minimum: 1
+          example: 5
+        clockLimit:
+          type: integer
+          description: Base time in seconds
+          example: 300
+        clockIncrement:
+          type: integer
+          description: Increment per move in seconds
+          example: 3
+        rated:
+          type: boolean
+          default: true
+
+    Result:
+      type: object
+      properties:
+        rank:
+          type: integer
+          example: 1
+        points:
+          type: number
+          format: double
+          example: 3.5
+        tieBreak:
+          type: number
+          format: double
+          description: Buchholz score (sum of opponents' points)
+          example: 9.0
+        bot:
+          $ref: "#/components/schemas/BotRef"
+        nbGames:
+          type: integer
+          example: 4
+        wins:
+          type: integer
+          example: 3
+        draws:
+          type: integer
+          example: 1
+        losses:
+          type: integer
+          example: 0
+
+    Pairing:
+      type: object
+      properties:
+        round:
+          type: integer
+          example: 2
+        white:
+          $ref: "#/components/schemas/BotRef"
+        black:
+          $ref: "#/components/schemas/BotRef"
+        gameId:
+          type: string
+          example: j0nPtcjl
+        winner:
+          type: string
+          enum: [white, black, draw]
+          nullable: true
+          description: Null while the game is ongoing
+
+    GameExport:
+      description: One game object per NDJSON line.
+      type: object
+      properties:
+        id:
+          type: string
+          example: j0nPtcjl
+        round:
+          type: integer
+          example: 2
+        white:
+          $ref: "#/components/schemas/BotRef"
+        black:
+          $ref: "#/components/schemas/BotRef"
+        winner:
+          type: string
+          enum: [white, black, draw]
+          nullable: true
+        moves:
+          type: string
+          description: Space-separated UCI moves
+          example: e2e4 e7e5 g1f3
+
+    TournamentEvent:
+      description: |
+        One JSON object per NDJSON line. Discriminate on `type`.
+
+        | type | extra fields |
+        |------|-------------|
+        | `tournamentStarted` | — |
+        | `roundStarted` | `round` |
+        | `gameStart` | `round`, `gameId`, `color` |
+        | `roundFinished` | `round` |
+        | `tournamentFinished` | `winner` |
+      type: object
+      required: [type]
+      properties:
+        type:
+          type: string
+          enum:
+            - tournamentStarted
+            - roundStarted
+            - gameStart
+            - roundFinished
+            - tournamentFinished
+        round:
+          type: integer
+          example: 2
+        gameId:
+          type: string
+          example: j0nPtcjl
+        color:
+          type: string
+          enum: [white, black]
+        winner:
+          $ref: "#/components/schemas/BotRef"
+
+    Ok:
+      type: object
+      properties:
+        ok:
+          type: boolean
+          example: true
+
+    Error:
+      type: object
+      properties:
+        error:
+          type: string
+          example: tournament already started
+
+  responses:
+    BadRequest:
+      description: Invalid request body or parameters
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/Error"
+    Unauthorized:
+      description: Missing or invalid JWT
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/Error"
+    Forbidden:
+      description: Action not permitted for this user or bot
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/Error"
+    NotFound:
+      description: Tournament not found
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/Error"
+    Conflict:
+      description: Conflicting state (e.g. already started, bot already joined)
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/Error"

modules/account/CHANGELOG.md

@@ -348,3 +348,145 @@
 
 * Revert "feat: add authentication permissions for metrics endpoints in application.yml" ([a298417](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a298417b9e4d68dc73bbf40be63d9484536e9f83))
 * Revert "refactor: update metrics paths formatting in application.yml for clarity" ([3870566](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/38705663498d5f47c40dafe2f26198589ede8656))
+##  (2026-06-03)
+
+### Features
+
+* **account:** implement token pair handling for login and refresh endpoints ([9296db8](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/9296db88b7131bbda9b9b0da65c327ef9063ee31))
+* add authentication permissions for metrics endpoints in application.yml ([04edd4d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/04edd4d6fd8a63196c36f6d67992832febc9bebb))
+* add initialization metrics for various services ([d438e97](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/d438e97f32bdde0bfc63c1b4a8cc810cdd093166))
+* add OpenTelemetry trace configuration with parentbased sampler ([3904d5a](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3904d5ad8ad4930ddee65287a7bfab785a6148f5))
+* **config:** add H2 database configuration for testing environment ([39c9e49](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/39c9e492cef2515368c074da9406f95e9c0c9e64))
+* **config:** update application.yml for PostgreSQL and remove staging/production configurations ([2404e61](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/2404e6164c3b50ffccbea5238d636060d6abe4d6))
+* **config:** update application.yml for staging and production environments ([6113432](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/6113432a14c476a3a0dfc0d449e17d023697f2ba))
+* configure logging and add OpenTelemetry support ([#49](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/49)) ([d57c488](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/d57c4886612d1d92da0e1b79209fc83e6ef537a1))
+* **docker:** add .dockerignore and .gitignore files for build exclusions ([c987d8e](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/c987d8e258c0e6c4cfbdaa8381c64c410d7a2b83))
+* **docker:** add Dockerfiles for building Quarkus application in native and JVM modes ([3f2d2bb](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3f2d2bb4c97fa8cddba66e1da4427c54236dfeed))
+* **docker:** add Dockerfiles for Quarkus application in JVM and native modes ([34b9933](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/34b993304670cf2aa62cd2f6460cee7b9864b08e))
+* **logging:** add DEBUG/INFO/WARN logging across services (NCS-72) ([#41](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/41)) ([804a4bf](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/804a4bf179e3dfb19e2be4390e7e543caf5237c6))
+* NCS-78 Add Traceability to the Applications ([#46](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/46)) ([649566e](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/649566eb3fcf38f91c8896a739f74ea318af312d))
+* NCS-78 Add Traceability to the Applications ([#47](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/47)) ([87dfc6c](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/87dfc6c2bcce7f7d58fc641bd8d468a2e584c108))
+* true-microservices ([#40](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/40)) ([5909242](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/590924254e8a2754de661a57a03e43f89ceb6299))
+* update application.yml with new API root paths and add Micrometer and OpenTelemetry dependencies ([72ce262](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/72ce262bc491f94297700e6002fb5d0812e2cc2a))
+
+### Bug Fixes
+
+* **account:** configure JDBC connection pool size to prevent exhaustion under load ([29072ef](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/29072efbfb1cfa1c3b1a85b4c1a587c971d245f9))
+* **auth:** add InternalClientHeadersFactory for custom client headers management ([e279c39](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/e279c39246470156bf11e745ee72204018d4229d))
+* NCS-84 More Verbose Logging ([#51](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/51)) ([4ad92ab](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/4ad92ab23698267f8faa59c4e18388d4a0042cca))
+* **official-bots:** NCS-70-auto-register official bots with account service ([#59](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/59)) ([7117a93](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/7117a93376272094d0b1a6abf2121254ce396684))
+* remove unused HTTP root-path configurations from application.yml ([3ed3e59](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3ed3e59ee456d54cd3d65ece4f36623e256b9736))
+* **tests:** update token path to accessToken in ChallengeResourceTest ([354db11](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/354db11972342c47a1034303c11bccfb92e60109))
+
+### Reverts
+
+* Revert "feat: add authentication permissions for metrics endpoints in application.yml" ([a298417](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a298417b9e4d68dc73bbf40be63d9484536e9f83))
+* Revert "refactor: update metrics paths formatting in application.yml for clarity" ([3870566](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/38705663498d5f47c40dafe2f26198589ede8656))
+##  (2026-06-05)
+
+### Features
+
+* **account:** implement token pair handling for login and refresh endpoints ([9296db8](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/9296db88b7131bbda9b9b0da65c327ef9063ee31))
+* add authentication permissions for metrics endpoints in application.yml ([04edd4d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/04edd4d6fd8a63196c36f6d67992832febc9bebb))
+* add initialization metrics for various services ([d438e97](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/d438e97f32bdde0bfc63c1b4a8cc810cdd093166))
+* add OpenTelemetry trace configuration with parentbased sampler ([3904d5a](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3904d5ad8ad4930ddee65287a7bfab785a6148f5))
+* **api:** define shared EventEnvelope and EventType for Redis EventBus ([#61](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/61)) ([595c172](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/595c172900da99de367c274488c3ccbeaef55882))
+* **config:** add H2 database configuration for testing environment ([39c9e49](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/39c9e492cef2515368c074da9406f95e9c0c9e64))
+* **config:** update application.yml for PostgreSQL and remove staging/production configurations ([2404e61](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/2404e6164c3b50ffccbea5238d636060d6abe4d6))
+* **config:** update application.yml for staging and production environments ([6113432](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/6113432a14c476a3a0dfc0d449e17d023697f2ba))
+* configure logging and add OpenTelemetry support ([#49](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/49)) ([d57c488](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/d57c4886612d1d92da0e1b79209fc83e6ef537a1))
+* **docker:** add .dockerignore and .gitignore files for build exclusions ([c987d8e](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/c987d8e258c0e6c4cfbdaa8381c64c410d7a2b83))
+* **docker:** add Dockerfiles for building Quarkus application in native and JVM modes ([3f2d2bb](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3f2d2bb4c97fa8cddba66e1da4427c54236dfeed))
+* **docker:** add Dockerfiles for Quarkus application in JVM and native modes ([34b9933](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/34b993304670cf2aa62cd2f6460cee7b9864b08e))
+* **logging:** add DEBUG/INFO/WARN logging across services (NCS-72) ([#41](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/41)) ([804a4bf](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/804a4bf179e3dfb19e2be4390e7e543caf5237c6))
+* NCS-78 Add Traceability to the Applications ([#46](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/46)) ([649566e](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/649566eb3fcf38f91c8896a739f74ea318af312d))
+* NCS-78 Add Traceability to the Applications ([#47](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/47)) ([87dfc6c](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/87dfc6c2bcce7f7d58fc641bd8d468a2e584c108))
+* true-microservices ([#40](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/40)) ([5909242](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/590924254e8a2754de661a57a03e43f89ceb6299))
+* update application.yml with new API root paths and add Micrometer and OpenTelemetry dependencies ([72ce262](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/72ce262bc491f94297700e6002fb5d0812e2cc2a))
+
+### Bug Fixes
+
+* **account:** configure JDBC connection pool size to prevent exhaustion under load ([29072ef](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/29072efbfb1cfa1c3b1a85b4c1a587c971d245f9))
+* **auth:** add InternalClientHeadersFactory for custom client headers management ([e279c39](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/e279c39246470156bf11e745ee72204018d4229d))
+* NCS-84 More Verbose Logging ([#51](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/51)) ([4ad92ab](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/4ad92ab23698267f8faa59c4e18388d4a0042cca))
+* **official-bots:** NCS-70-auto-register official bots with account service ([#59](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/59)) ([7117a93](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/7117a93376272094d0b1a6abf2121254ce396684))
+* remove unused HTTP root-path configurations from application.yml ([3ed3e59](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3ed3e59ee456d54cd3d65ece4f36623e256b9736))
+* **tests:** update token path to accessToken in ChallengeResourceTest ([354db11](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/354db11972342c47a1034303c11bccfb92e60109))
+
+### Reverts
+
+* Revert "feat: add authentication permissions for metrics endpoints in application.yml" ([a298417](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a298417b9e4d68dc73bbf40be63d9484536e9f83))
+* Revert "refactor: update metrics paths formatting in application.yml for clarity" ([3870566](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/38705663498d5f47c40dafe2f26198589ede8656))
+##  (2026-06-09)
+
+### Features
+
+* **account:** implement token pair handling for login and refresh endpoints ([9296db8](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/9296db88b7131bbda9b9b0da65c327ef9063ee31))
+* add authentication permissions for metrics endpoints in application.yml ([04edd4d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/04edd4d6fd8a63196c36f6d67992832febc9bebb))
+* add initialization metrics for various services ([d438e97](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/d438e97f32bdde0bfc63c1b4a8cc810cdd093166))
+* add OpenTelemetry trace configuration with parentbased sampler ([3904d5a](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3904d5ad8ad4930ddee65287a7bfab785a6148f5))
+* **api:** define shared EventEnvelope and EventType for Redis EventBus ([#61](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/61)) ([595c172](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/595c172900da99de367c274488c3ccbeaef55882))
+* **config:** add H2 database configuration for testing environment ([39c9e49](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/39c9e492cef2515368c074da9406f95e9c0c9e64))
+* **config:** update application.yml for PostgreSQL and remove staging/production configurations ([2404e61](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/2404e6164c3b50ffccbea5238d636060d6abe4d6))
+* **config:** update application.yml for staging and production environments ([6113432](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/6113432a14c476a3a0dfc0d449e17d023697f2ba))
+* configure logging and add OpenTelemetry support ([#49](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/49)) ([d57c488](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/d57c4886612d1d92da0e1b79209fc83e6ef537a1))
+* **docker:** add .dockerignore and .gitignore files for build exclusions ([c987d8e](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/c987d8e258c0e6c4cfbdaa8381c64c410d7a2b83))
+* **docker:** add Dockerfiles for building Quarkus application in native and JVM modes ([3f2d2bb](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3f2d2bb4c97fa8cddba66e1da4427c54236dfeed))
+* **docker:** add Dockerfiles for Quarkus application in JVM and native modes ([34b9933](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/34b993304670cf2aa62cd2f6460cee7b9864b08e))
+* **events:** migrate game-creation and bot flows to Redis Streams NCS-89 ([#62](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/62)) ([a24924c](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a24924c23057db3d700a75dbc4333557789cd991))
+* **logging:** add DEBUG/INFO/WARN logging across services (NCS-72) ([#41](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/41)) ([804a4bf](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/804a4bf179e3dfb19e2be4390e7e543caf5237c6))
+* NCS-78 Add Traceability to the Applications ([#46](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/46)) ([649566e](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/649566eb3fcf38f91c8896a739f74ea318af312d))
+* NCS-78 Add Traceability to the Applications ([#47](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/47)) ([87dfc6c](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/87dfc6c2bcce7f7d58fc641bd8d468a2e584c108))
+* true-microservices ([#40](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/40)) ([5909242](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/590924254e8a2754de661a57a03e43f89ceb6299))
+* update application.yml with new API root paths and add Micrometer and OpenTelemetry dependencies ([72ce262](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/72ce262bc491f94297700e6002fb5d0812e2cc2a))
+
+### Bug Fixes
+
+* **account:** configure JDBC connection pool size to prevent exhaustion under load ([29072ef](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/29072efbfb1cfa1c3b1a85b4c1a587c971d245f9))
+* **auth:** add InternalClientHeadersFactory for custom client headers management ([e279c39](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/e279c39246470156bf11e745ee72204018d4229d))
+* NCS-84 More Verbose Logging ([#51](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/51)) ([4ad92ab](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/4ad92ab23698267f8faa59c4e18388d4a0042cca))
+* **official-bots:** NCS-70-auto-register official bots with account service ([#59](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/59)) ([7117a93](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/7117a93376272094d0b1a6abf2121254ce396684))
+* remove unused HTTP root-path configurations from application.yml ([3ed3e59](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3ed3e59ee456d54cd3d65ece4f36623e256b9736))
+* **tests:** update token path to accessToken in ChallengeResourceTest ([354db11](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/354db11972342c47a1034303c11bccfb92e60109))
+
+### Reverts
+
+* Revert "feat: add authentication permissions for metrics endpoints in application.yml" ([a298417](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a298417b9e4d68dc73bbf40be63d9484536e9f83))
+* Revert "refactor: update metrics paths formatting in application.yml for clarity" ([3870566](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/38705663498d5f47c40dafe2f26198589ede8656))
+##  (2026-06-09)
+
+### Features
+
+* **account:** implement token pair handling for login and refresh endpoints ([9296db8](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/9296db88b7131bbda9b9b0da65c327ef9063ee31))
+* add authentication permissions for metrics endpoints in application.yml ([04edd4d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/04edd4d6fd8a63196c36f6d67992832febc9bebb))
+* add initialization metrics for various services ([d438e97](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/d438e97f32bdde0bfc63c1b4a8cc810cdd093166))
+* add OpenTelemetry trace configuration with parentbased sampler ([3904d5a](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3904d5ad8ad4930ddee65287a7bfab785a6148f5))
+* **api:** define shared EventEnvelope and EventType for Redis EventBus ([#61](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/61)) ([595c172](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/595c172900da99de367c274488c3ccbeaef55882))
+* **config:** add H2 database configuration for testing environment ([39c9e49](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/39c9e492cef2515368c074da9406f95e9c0c9e64))
+* **config:** update application.yml for PostgreSQL and remove staging/production configurations ([2404e61](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/2404e6164c3b50ffccbea5238d636060d6abe4d6))
+* **config:** update application.yml for staging and production environments ([6113432](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/6113432a14c476a3a0dfc0d449e17d023697f2ba))
+* configure logging and add OpenTelemetry support ([#49](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/49)) ([d57c488](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/d57c4886612d1d92da0e1b79209fc83e6ef537a1))
+* **docker:** add .dockerignore and .gitignore files for build exclusions ([c987d8e](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/c987d8e258c0e6c4cfbdaa8381c64c410d7a2b83))
+* **docker:** add Dockerfiles for building Quarkus application in native and JVM modes ([3f2d2bb](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3f2d2bb4c97fa8cddba66e1da4427c54236dfeed))
+* **docker:** add Dockerfiles for Quarkus application in JVM and native modes ([34b9933](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/34b993304670cf2aa62cd2f6460cee7b9864b08e))
+* **events:** migrate game-creation and bot flows to Redis Streams NCS-89 ([#62](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/62)) ([a24924c](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a24924c23057db3d700a75dbc4333557789cd991))
+* **logging:** add DEBUG/INFO/WARN logging across services (NCS-72) ([#41](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/41)) ([804a4bf](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/804a4bf179e3dfb19e2be4390e7e543caf5237c6))
+* NCS-78 Add Traceability to the Applications ([#46](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/46)) ([649566e](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/649566eb3fcf38f91c8896a739f74ea318af312d))
+* NCS-78 Add Traceability to the Applications ([#47](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/47)) ([87dfc6c](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/87dfc6c2bcce7f7d58fc641bd8d468a2e584c108))
+* NCS-82 add Swiss-system tournament module ([#55](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/55)) ([c5661de](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/c5661de4a0ebf4b33211f5a391840dcf744656b7))
+* true-microservices ([#40](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/40)) ([5909242](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/590924254e8a2754de661a57a03e43f89ceb6299))
+* update application.yml with new API root paths and add Micrometer and OpenTelemetry dependencies ([72ce262](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/72ce262bc491f94297700e6002fb5d0812e2cc2a))
+
+### Bug Fixes
+
+* **account:** configure JDBC connection pool size to prevent exhaustion under load ([29072ef](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/29072efbfb1cfa1c3b1a85b4c1a587c971d245f9))
+* **auth:** add InternalClientHeadersFactory for custom client headers management ([e279c39](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/e279c39246470156bf11e745ee72204018d4229d))
+* NCS-84 More Verbose Logging ([#51](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/51)) ([4ad92ab](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/4ad92ab23698267f8faa59c4e18388d4a0042cca))
+* **official-bots:** NCS-70-auto-register official bots with account service ([#59](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/59)) ([7117a93](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/7117a93376272094d0b1a6abf2121254ce396684))
+* remove unused HTTP root-path configurations from application.yml ([3ed3e59](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3ed3e59ee456d54cd3d65ece4f36623e256b9736))
+* **tests:** update token path to accessToken in ChallengeResourceTest ([354db11](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/354db11972342c47a1034303c11bccfb92e60109))
+
+### Reverts
+
+* Revert "feat: add authentication permissions for metrics endpoints in application.yml" ([a298417](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a298417b9e4d68dc73bbf40be63d9484536e9f83))
+* Revert "refactor: update metrics paths formatting in application.yml for clarity" ([3870566](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/38705663498d5f47c40dafe2f26198589ede8656))

modules/account/build.gradle.kts

@@ -45,6 +45,7 @@ dependencies {
         }
     }
 
+    implementation(project(":modules:api"))
     implementation(project(":modules:security"))
 
     implementation(platform("${quarkusPlatformGroupId}:${quarkusPlatformArtifactId}:${quarkusPlatformVersion}"))

modules/account/src/main/scala/de/nowchess/account/client/CoreGameDtos.scala

@@ -0,0 +1,10 @@
+package de.nowchess.account.client
+
+case class CorePlayerInfo(id: String, displayName: String)
+case class CoreTimeControl(limitSeconds: Option[Int], incrementSeconds: Option[Int], daysPerMove: Option[Int])
+case class CoreCreateGameRequest(
+    white: Option[CorePlayerInfo],
+    black: Option[CorePlayerInfo],
+    timeControl: Option[CoreTimeControl],
+    mode: Option[String],
+)

modules/account/src/main/scala/de/nowchess/account/client/GameCreationStreamClient.scala

@@ -0,0 +1,133 @@
+package de.nowchess.account.client
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import de.nowchess.account.config.RedisConfig
+import de.nowchess.api.dto.{GameCreationRequestDto, GameCreationResponseDto, PlayerInfoDto, TimeControlDto}
+import de.nowchess.api.game.GameMode
+import de.nowchess.api.player.PlayerType
+import de.nowchess.api.event.{EventEnvelope, EventType}
+import io.quarkus.redis.datasource.RedisDataSource
+import io.quarkus.redis.datasource.stream.{StreamMessage, XAddArgs, XGroupCreateArgs, XReadGroupArgs}
+import io.quarkus.runtime.StartupEvent
+import jakarta.enterprise.context.ApplicationScoped
+import jakarta.enterprise.event.Observes
+import jakarta.inject.Inject
+import org.eclipse.microprofile.config.inject.ConfigProperty
+import org.eclipse.microprofile.context.ManagedExecutor
+import org.jboss.logging.Logger
+import scala.compiletime.uninitialized
+import scala.jdk.CollectionConverters.*
+import scala.util.{Failure, Success, Try}
+import java.time.Duration
+import java.util.UUID
+import java.util.concurrent.{CompletableFuture, ConcurrentHashMap, TimeUnit}
+
+@ApplicationScoped
+class GameCreationStreamClient:
+
+  // scalafix:off DisableSyntax.var
+  @Inject var redis: RedisDataSource     = uninitialized
+  @Inject var redisConfig: RedisConfig   = uninitialized
+  @Inject var objectMapper: ObjectMapper = uninitialized
+  @Inject var executor: ManagedExecutor  = uninitialized
+  @ConfigProperty(name = "nowchess.game-creation-stream.enabled", defaultValue = "true")
+  private var streamEnabled: Boolean = true
+  // scalafix:on DisableSyntax.var
+
+  private val log          = Logger.getLogger(classOf[GameCreationStreamClient])
+  private val instanceId   = UUID.randomUUID().toString
+  private val groupName    = s"account-game-creation-$instanceId"
+  private val consumerId   = instanceId
+  private val maxStreamLen = 1000L
+  private val timeout      = Duration.ofSeconds(10)
+
+  private val pending = new ConcurrentHashMap[String, CompletableFuture[GameCreationResponseDto]]()
+
+  private def requestStream: String  = s"${redisConfig.prefix}:game-creation"
+  private def responseStream: String = s"${redisConfig.prefix}:game-creation-response"
+
+  def start(@Observes _ev: StartupEvent): Unit =
+    if streamEnabled then
+      createGroupIfAbsent()
+      executor.submit(
+        new Runnable:
+          def run(): Unit = pollLoop(),
+      )
+      log.infof("Game-creation response listener started (consumer=%s)", consumerId)
+
+  def createGame(req: CoreCreateGameRequest): GameCreationResponseDto =
+    val correlationId = UUID.randomUUID().toString
+    val future        = new CompletableFuture[GameCreationResponseDto]()
+    pending.put(correlationId, future)
+    Try {
+      val payload  = objectMapper.valueToTree[com.fasterxml.jackson.databind.JsonNode](toDto(req))
+      val envelope = EventEnvelope.of(EventType.GameCreationRequest, payload, Some(correlationId))
+      publish(requestStream, envelope)
+      future.get(timeout.toMillis, TimeUnit.MILLISECONDS)
+    } match
+      case Success(resp) =>
+        pending.remove(correlationId)
+        resp
+      case Failure(ex) =>
+        pending.remove(correlationId)
+        log.errorf(ex, "Game creation request %s failed", correlationId)
+        GameCreationResponseDto(None, Some("Game creation request timed out or failed"))
+
+  private def toDto(req: CoreCreateGameRequest): GameCreationRequestDto =
+    GameCreationRequestDto(
+      white = req.white.map(p => PlayerInfoDto(p.id, p.displayName, PlayerType.Human)),
+      black = req.black.map(p => PlayerInfoDto(p.id, p.displayName, PlayerType.Human)),
+      timeControl = req.timeControl.map(t => TimeControlDto(t.limitSeconds, t.incrementSeconds, t.daysPerMove)),
+      mode = req.mode.map(_ => GameMode.Authenticated),
+    )
+
+  private def createGroupIfAbsent(): Unit =
+    Try(
+      redis
+        .stream(classOf[String])
+        .xgroupCreate(responseStream, groupName, "0", new XGroupCreateArgs().mkstream()),
+    ) match
+      case Failure(ex) if Option(ex.getMessage).exists(_.contains("BUSYGROUP")) => ()
+      case Failure(ex) => log.warnf(ex, "Failed to create response consumer group")
+      case Success(_)  => ()
+
+  private def pollLoop(): Unit =
+    while true do
+      Try {
+        val messages = redis
+          .stream(classOf[String])
+          .xreadgroup(
+            groupName,
+            consumerId,
+            responseStream,
+            ">",
+            new XReadGroupArgs().count(10).block(Duration.ofSeconds(2)),
+          )
+        Option(messages).foreach(_.forEach(handleResponse))
+      } match
+        case Failure(ex) => log.warnf(ex, "Error in game-creation response poll loop")
+        case Success(_)  => ()
+
+  private def handleResponse(msg: StreamMessage[String, String, String]): Unit =
+    val json = msg.payload().get("data")
+    Try(objectMapper.readValue(json, classOf[EventEnvelope])) match
+      case Success(envelope) =>
+        envelope.correlationId.flatMap(id => Option(pending.remove(id))).foreach { future =>
+          Try(objectMapper.treeToValue(envelope.payload, classOf[GameCreationResponseDto])) match
+            case Success(resp) => future.complete(resp)
+            case Failure(ex)   => future.completeExceptionally(ex)
+        }
+      case Failure(ex) => log.warnf(ex, "Unparseable game-creation response: %s", json)
+    ack(msg.id())
+
+  private def ack(id: String): Unit =
+    Try(redis.stream(classOf[String]).xack(responseStream, groupName, id)) match
+      case Failure(ex) => log.warnf(ex, "Failed to ack response %s", id)
+      case Success(_)  => ()
+
+  private def publish(key: String, envelope: EventEnvelope): Unit =
+    val json = objectMapper.writeValueAsString(envelope)
+    redis
+      .stream(classOf[String])
+      .xadd(key, new XAddArgs().maxlen(maxStreamLen).nearlyExactTrimming(), Map("data" -> json).asJava)
+    ()

modules/account/src/main/scala/de/nowchess/account/config/NativeReflectionConfig.scala

@@ -1,6 +1,6 @@
 package de.nowchess.account.config
 
-import de.nowchess.account.client.{CoreCreateGameRequest, CoreGameResponse, CorePlayerInfo, CoreTimeControl}
+import de.nowchess.account.client.{CoreCreateGameRequest, CorePlayerInfo, CoreTimeControl}
 import de.nowchess.account.domain.{
   BotAccount,
   Challenge,
@@ -12,10 +12,19 @@ import de.nowchess.account.domain.{
   UserAccount,
 }
 import de.nowchess.account.dto.*
+import de.nowchess.api.dto.{
+  GameCreationRequestDto,
+  GameCreationResponseDto,
+  PlayerInfoDto as ApiPlayerInfoDto,
+  TimeControlDto as ApiTimeControlDto,
+}
+import de.nowchess.api.event.{EventEnvelope, EventType}
 import io.quarkus.runtime.annotations.RegisterForReflection
 
 @RegisterForReflection(
   targets = Array(
+    classOf[EventEnvelope],
+    classOf[EventType],
     classOf[UserAccount],
     classOf[BotAccount],
     classOf[OfficialBotAccount],
@@ -44,8 +53,11 @@ import io.quarkus.runtime.annotations.RegisterForReflection
     classOf[CorePlayerInfo],
     classOf[CoreTimeControl],
     classOf[CoreCreateGameRequest],
-    classOf[CoreGameResponse],
     classOf[OfficialChallengeResponse],
+    classOf[GameCreationRequestDto],
+    classOf[GameCreationResponseDto],
+    classOf[ApiPlayerInfoDto],
+    classOf[ApiTimeControlDto],
   ),
 )
 class NativeReflectionConfig

modules/account/src/main/scala/de/nowchess/account/domain/UserAccount.scala

@@ -51,7 +51,7 @@ class BotAccount extends PanacheEntityBase:
   @JoinColumn(name = "owner_id", nullable = false)
   var owner: UserAccount = uninitialized
 
-  @Column(unique = true, nullable = false, length = 256)
+  @Column(unique = true, nullable = false, length = 1024)
   var token: String = uninitialized
 
   var rating: Int = 1500
@@ -75,4 +75,7 @@ class OfficialBotAccount extends PanacheEntityBase:
   var rating: Int = 1500
 
   var createdAt: Instant = uninitialized
+
+  @Column(length = 1024)
+  var token: String = uninitialized
   // scalafix:on

modules/account/src/main/scala/de/nowchess/account/dto/Dtos.scala

@@ -46,6 +46,8 @@ case class BotAccountWithTokenDto(id: String, name: String, rating: Int, token:
 
 case class RotatedTokenDto(token: String)
 
-case class OfficialBotAccountDto(id: String, name: String, rating: Int, createdAt: String)
+case class OfficialBotAccountDto(id: String, name: String, rating: Int, createdAt: String, token: Option[String] = None)
 
 case class OfficialChallengeResponse(gameId: String, botName: String, difficulty: Int)
+
+case class SyncOfficialBotsRequest(bots: List[String])

modules/account/src/main/scala/de/nowchess/account/repository/AccountRepository.scala

@@ -89,6 +89,13 @@ class OfficialBotAccountRepository:
   def findAll(): List[OfficialBotAccount] =
     em.createQuery("FROM OfficialBotAccount", classOf[OfficialBotAccount]).getResultList.asScala.toList
 
+  def findByName(name: String): Option[OfficialBotAccount] =
+    em.createQuery("FROM OfficialBotAccount WHERE name = :name", classOf[OfficialBotAccount])
+      .setParameter("name", name)
+      .getResultList
+      .asScala
+      .headOption
+
   def persist(bot: OfficialBotAccount): OfficialBotAccount =
     em.persist(bot)
     bot

modules/account/src/main/scala/de/nowchess/account/resource/AccountResource.scala

@@ -4,6 +4,7 @@ import de.nowchess.account.domain.{BotAccount, OfficialBotAccount, UserAccount}
 import de.nowchess.account.dto.*
 import de.nowchess.account.error.AccountError
 import de.nowchess.account.service.AccountService
+import de.nowchess.security.InternalOnly
 import jakarta.annotation.security.RolesAllowed
 import jakarta.enterprise.context.ApplicationScoped
 import jakarta.inject.Inject
@@ -179,6 +180,13 @@ class AccountResource:
       createdAt = bot.createdAt.toString,
     )
 
+  @POST
+  @Path("/official-bots/sync")
+  @InternalOnly
+  def syncOfficialBots(req: SyncOfficialBotsRequest): Response =
+    accountService.syncOfficialBots(req.bots)
+    Response.noContent().build()
+
   @GET
   @Path("/official-bots")
   def getOfficialBots: Response =
@@ -191,7 +199,7 @@ class AccountResource:
   def createOfficialBot(req: CreateBotAccountRequest): Response =
     accountService.createOfficialBotAccount(req.name) match
       case Right(bot) =>
-        Response.status(Response.Status.CREATED).entity(toOfficialBotDto(bot)).build()
+        Response.status(Response.Status.CREATED).entity(toOfficialBotDtoWithToken(bot)).build()
       case Left(error) =>
         Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(ErrorDto(error.message)).build()
 
@@ -211,3 +219,12 @@ class AccountResource:
       rating = bot.rating,
       createdAt = bot.createdAt.toString,
     )
+
+  private def toOfficialBotDtoWithToken(bot: OfficialBotAccount): OfficialBotAccountDto =
+    OfficialBotAccountDto(
+      id = bot.id.toString,
+      name = bot.name,
+      rating = bot.rating,
+      createdAt = bot.createdAt.toString,
+      token = Some(bot.token),
+    )

modules/account/src/main/scala/de/nowchess/account/resource/OfficialChallengeResource.scala

@@ -1,6 +1,6 @@
 package de.nowchess.account.resource
 
-import de.nowchess.account.client.{CoreCreateGameRequest, CoreGameClient, CorePlayerInfo}
+import de.nowchess.account.client.{CoreCreateGameRequest, CorePlayerInfo, GameCreationStreamClient}
 import de.nowchess.account.dto.{ErrorDto, OfficialChallengeResponse}
 import de.nowchess.account.service.{AccountService, EventPublisher}
 import jakarta.annotation.security.RolesAllowed
@@ -9,7 +9,6 @@ import jakarta.inject.Inject
 import jakarta.ws.rs.*
 import jakarta.ws.rs.core.{MediaType, Response}
 import org.eclipse.microprofile.jwt.JsonWebToken
-import org.eclipse.microprofile.rest.client.inject.RestClient
 import org.jboss.logging.Logger
 import scala.compiletime.uninitialized
 
@@ -29,8 +28,7 @@ class OfficialChallengeResource:
   @Inject var botEventPublisher: EventPublisher = uninitialized
 
   @Inject
-  @RestClient
-  var coreGameClient: CoreGameClient = uninitialized
+  var gameCreationClient: GameCreationStreamClient = uninitialized
   // scalafix:on
 
   private val log = Logger.getLogger(classOf[OfficialChallengeResource])
@@ -72,7 +70,7 @@ class OfficialChallengeResource:
                   (CorePlayerInfo(bot.id.toString, bot.name), CorePlayerInfo(user.id.toString, user.username), "white")
               val req = CoreCreateGameRequest(Some(white), Some(black), None, Some("Authenticated"))
               val gameId =
-                try Right(coreGameClient.createGame(req).gameId)
+                try gameCreationClient.createGame(req).gameId.toRight("Failed to create game")
                 catch case _ => Left("Failed to create game")
               gameId match
                 case Left(err) =>

modules/account/src/main/scala/de/nowchess/account/service/AccountService.scala

@@ -153,9 +153,10 @@ class AccountService:
           val bot = new BotAccount()
           bot.name = botName
           bot.owner = owner
-          bot.token = generateBotToken(bot.id)
+          bot.token = UUID.randomUUID().toString
           bot.createdAt = Instant.now()
           botAccountRepository.persist(bot)
+          bot.token = generateBotToken(bot.id, bot.name)
           log.infof("Bot account %s created for owner %s", botName, ownerId.toString)
           Right(bot)
 
@@ -194,7 +195,7 @@ class AccountService:
       case Some(bot) =>
         if bot.owner.id != ownerId then Left(AccountError.NotAuthorized)
         else
-          bot.token = generateBotToken(botId)
+          bot.token = generateBotToken(botId, bot.name)
           botAccountRepository.persist(bot)
           Right(bot)
 
@@ -204,8 +205,23 @@ class AccountService:
     bot.name = botName
     bot.createdAt = Instant.now()
     officialBotAccountRepository.persist(bot)
+    bot.token = generateBotToken(bot.id, bot.name)
+    officialBotAccountRepository.persist(bot)
     Right(bot)
 
+  @Transactional
+  def syncOfficialBots(botNames: List[String]): Unit =
+    botNames.foreach { name =>
+      if officialBotAccountRepository.findByName(name).isEmpty then
+        val bot = new OfficialBotAccount()
+        bot.name = name
+        bot.createdAt = Instant.now()
+        officialBotAccountRepository.persist(bot)
+        bot.token = generateBotToken(bot.id, bot.name)
+        officialBotAccountRepository.persist(bot)
+        log.infof("Auto-registered official bot: %s", name)
+    }
+
   def getOfficialBotAccounts(): List[OfficialBotAccount] =
     officialBotAccountRepository.findAll()
 
@@ -217,12 +233,13 @@ class AccountService:
         officialBotAccountRepository.delete(botId)
         Right(())
 
-  private def generateBotToken(botId: UUID): String =
+  private def generateBotToken(botId: UUID, botName: String): String =
     Jwt
       .issuer("nowchess")
       .subject(botId.toString)
       .expiresAt(Long.MaxValue)
       .claim("type", "bot")
+      .claim("name", botName)
       .sign()
 
   @Transactional

modules/account/src/main/scala/de/nowchess/account/service/ChallengeService.scala

@@ -1,12 +1,6 @@
 package de.nowchess.account.service
 
-import de.nowchess.account.client.{
-  CoreCreateGameRequest,
-  CoreGameClient,
-  CoreGameResponse,
-  CorePlayerInfo,
-  CoreTimeControl,
-}
+import de.nowchess.account.client.{CoreCreateGameRequest, CorePlayerInfo, CoreTimeControl, GameCreationStreamClient}
 import de.nowchess.account.domain.{Challenge, ChallengeColor, ChallengeStatus, DeclineReason}
 import de.nowchess.account.dto.{
   ChallengeDto,
@@ -23,7 +17,6 @@ import jakarta.annotation.PostConstruct
 import jakarta.enterprise.context.ApplicationScoped
 import jakarta.inject.Inject
 import jakarta.transaction.Transactional
-import org.eclipse.microprofile.rest.client.inject.RestClient
 import org.jboss.logging.Logger
 import scala.compiletime.uninitialized
 
@@ -45,8 +38,7 @@ class ChallengeService:
   var challengeRepository: ChallengeRepository = uninitialized
 
   @Inject
-  @RestClient
-  var coreGameClient: CoreGameClient = uninitialized
+  var gameCreationClient: GameCreationStreamClient = uninitialized
 
   @Inject
   var eventPublisher: EventPublisher = uninitialized
@@ -187,7 +179,7 @@ class ChallengeService:
       val (white, black) = assignColors(challenge)
       val tc             = buildTimeControl(challenge)
       val req            = CoreCreateGameRequest(Some(white), Some(black), tc, Some("Authenticated"))
-      Right(coreGameClient.createGame(req).gameId)
+      gameCreationClient.createGame(req).gameId.toRight(ChallengeError.GameCreationFailed)
     catch case _ => Left(ChallengeError.GameCreationFailed)
 
   private def assignColors(challenge: Challenge): (CorePlayerInfo, CorePlayerInfo) =

modules/account/src/main/scala/de/nowchess/account/service/EventPublisher.scala

@@ -1,31 +1,67 @@
 package de.nowchess.account.service
 
+import com.fasterxml.jackson.databind.ObjectMapper
 import de.nowchess.account.config.RedisConfig
+import de.nowchess.api.event.{EventEnvelope, EventType}
 import io.quarkus.redis.datasource.RedisDataSource
+import io.quarkus.redis.datasource.stream.XAddArgs
 import jakarta.enterprise.context.ApplicationScoped
 import jakarta.inject.Inject
 import scala.compiletime.uninitialized
+import scala.jdk.CollectionConverters.*
 
 @ApplicationScoped
 class EventPublisher:
 
   // scalafix:off DisableSyntax.var
-  @Inject var redis: RedisDataSource   = uninitialized
-  @Inject var redisConfig: RedisConfig = uninitialized
+  @Inject var redis: RedisDataSource     = uninitialized
+  @Inject var redisConfig: RedisConfig   = uninitialized
+  @Inject var objectMapper: ObjectMapper = uninitialized
   // scalafix:on DisableSyntax.var
 
+  private val maxStreamLen = 1000L
+
   def publishGameStart(botId: String, gameId: String, playingAs: String, difficulty: Int, botAccountId: String): Unit =
-    val event =
-      s"""{"type":"gameStart","gameId":"$gameId","playingAs":"$playingAs","difficulty":$difficulty,"botAccountId":"$botAccountId"}"""
-    redis.pubsub(classOf[String]).publish(s"${redisConfig.prefix}:bot:$botId:events", event)
+    val payload = objectMapper.createObjectNode()
+    payload.put("gameId", gameId)
+    payload.put("playingAs", playingAs)
+    payload.put("difficulty", difficulty)
+    payload.put("botAccountId", botAccountId)
+    val envelope = EventEnvelope.of(EventType.BotGameStart, payload)
+    val json     = objectMapper.writeValueAsString(envelope)
+    redis
+      .stream(classOf[String])
+      .xadd(
+        s"${redisConfig.prefix}:bot:$botId:events:stream",
+        new XAddArgs().maxlen(maxStreamLen).nearlyExactTrimming(),
+        Map("data" -> json).asJava,
+      )
     ()
 
   def publishChallengeCreated(destUserId: String, challengeId: String, challengerName: String): Unit =
-    val event = s"""{"type":"challengeCreated","challengeId":"$challengeId","challengerName":"$challengerName"}"""
-    redis.pubsub(classOf[String]).publish(s"${redisConfig.prefix}:user:$destUserId:events", event)
-    ()
+    val payload = objectMapper.createObjectNode()
+    payload.put("challengeId", challengeId)
+    payload.put("challengerName", challengerName)
+    publishToUserStream(destUserId, EventType.ChallengeCreated, payload)
 
   def publishChallengeAccepted(challengerId: String, challengeId: String, gameId: String): Unit =
-    val event = s"""{"type":"challengeAccepted","challengeId":"$challengeId","gameId":"$gameId"}"""
-    redis.pubsub(classOf[String]).publish(s"${redisConfig.prefix}:user:$challengerId:events", event)
+    val payload = objectMapper.createObjectNode()
+    payload.put("challengeId", challengeId)
+    payload.put("gameId", gameId)
+    publishToUserStream(challengerId, EventType.ChallengeAccepted, payload)
+
+  private def publishToUserStream(
+      userId: String,
+      eventType: EventType,
+      payload: com.fasterxml.jackson.databind.node.ObjectNode,
+  ): Unit =
+    val envelope = EventEnvelope.of(eventType, payload)
+    val json     = objectMapper.writeValueAsString(envelope)
+    redis
+      .stream(classOf[String])
+      .xadd(
+        s"${redisConfig.prefix}:user:$userId:events:stream",
+        new XAddArgs().maxlen(maxStreamLen).nearlyExactTrimming(),
+        Map("data" -> json).asJava,
+      )
     ()

modules/account/src/test/resources/application.yml

@@ -34,3 +34,5 @@ nowchess:
     secret: test-secret
     auth:
       enabled: false
+  game-creation-stream:
+    enabled: false

modules/account/src/test/scala/de/nowchess/account/resource/AccountResourceTest.scala

@@ -154,3 +154,35 @@ class AccountResourceTest:
       .post("/api/account/refresh")
       .`then`()
       .statusCode(401)
+
+  @Test
+  def syncOfficialBotsCreatesNewBots(): Unit =
+    givenRequest()
+      .body("""{"bots":["sync-easy","sync-hard"]}""")
+      .when()
+      .post("/api/account/official-bots/sync")
+      .`then`()
+      .statusCode(204)
+    RestAssured
+      .`given`()
+      .when()
+      .get("/api/account/official-bots")
+      .`then`()
+      .statusCode(200)
+      .body("name", hasItems("sync-easy", "sync-hard"))
+
+  @Test
+  def syncOfficialBotsIsIdempotent(): Unit =
+    val body = """{"bots":["idempotent-bot"]}"""
+    givenRequest()
+      .body(body)
+      .when()
+      .post("/api/account/official-bots/sync")
+      .`then`()
+      .statusCode(204)
+    givenRequest()
+      .body(body)
+      .when()
+      .post("/api/account/official-bots/sync")
+      .`then`()
+      .statusCode(204)

modules/account/src/test/scala/de/nowchess/account/resource/ChallengeResourceTest.scala

@@ -1,11 +1,11 @@
 package de.nowchess.account.resource
 
-import de.nowchess.account.client.{CoreGameClient, CoreGameResponse}
+import de.nowchess.account.client.GameCreationStreamClient
+import de.nowchess.api.dto.GameCreationResponseDto
 import io.quarkus.test.InjectMock
 import io.quarkus.test.junit.QuarkusTest
 import io.restassured.RestAssured
 import io.restassured.http.ContentType
-import org.eclipse.microprofile.rest.client.inject.RestClient
 import org.hamcrest.Matchers.*
 import org.junit.jupiter.api.{BeforeEach, Test}
 import org.mockito.{ArgumentMatchers, Mockito}
@@ -14,14 +14,15 @@ import org.mockito.{ArgumentMatchers, Mockito}
 class ChallengeResourceTest:
 
   @InjectMock
-  @RestClient
   // scalafix:off DisableSyntax.var
-  var coreGameClient: CoreGameClient = scala.compiletime.uninitialized
+  var gameCreationClient: GameCreationStreamClient = scala.compiletime.uninitialized
   // scalafix:on
 
   @BeforeEach
   def setup(): Unit =
-    Mockito.when(coreGameClient.createGame(ArgumentMatchers.any())).thenReturn(CoreGameResponse("test-game-id"))
+    Mockito
+      .when(gameCreationClient.createGame(ArgumentMatchers.any()))
+      .thenReturn(GameCreationResponseDto(Some("test-game-id")))
 
   private def givenRequest() = RestAssured.`given`().contentType(ContentType.JSON)
 

modules/account/src/test/scala/de/nowchess/account/service/EventPublisherTest.scala

@@ -0,0 +1,56 @@
+package de.nowchess.account.service
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule
+import de.nowchess.account.config.RedisConfig
+import io.quarkus.redis.datasource.RedisDataSource
+import io.quarkus.redis.datasource.stream.{StreamCommands, XAddArgs}
+import org.junit.jupiter.api.{BeforeEach, Test}
+import org.mockito.ArgumentMatchers.*
+import org.mockito.Mockito.*
+import scala.compiletime.uninitialized
+
+class EventPublisherTest:
+
+  // scalafix:off DisableSyntax.var
+  private var redis: RedisDataSource                              = uninitialized
+  private var streamCmds: StreamCommands[String, String, Nothing] = uninitialized
+  private var redisConfig: RedisConfig                            = uninitialized
+  // scalafix:on DisableSyntax.var
+
+  private val objectMapper = new ObjectMapper().registerModule(new JavaTimeModule())
+
+  @BeforeEach
+  def setup(): Unit =
+    redis = mock(classOf[RedisDataSource])
+    streamCmds = mock(classOf[StreamCommands[String, String, Nothing]])
+    redisConfig = mock(classOf[RedisConfig])
+    when(redis.stream(classOf[String])).thenReturn(streamCmds)
+    when(redisConfig.prefix).thenReturn("nowchess")
+
+  private def publisher: EventPublisher =
+    val p = new EventPublisher
+    p.redis = redis
+    p.redisConfig = redisConfig
+    p.objectMapper = objectMapper
+    p
+
+  @Test
+  def publishChallengeCreatedWritesToUserStream(): Unit =
+    publisher.publishChallengeCreated("user1", "ch1", "Alice")
+    verify(streamCmds).xadd(
+      org.mockito.ArgumentMatchers.eq("nowchess:user:user1:events:stream"),
+      any(classOf[XAddArgs]),
+      any(),
+    )
+    verify(redis, never()).pubsub(any(classOf[Class[?]]))
+
+  @Test
+  def publishChallengeAcceptedWritesToUserStream(): Unit =
+    publisher.publishChallengeAccepted("user2", "ch1", "game42")
+    verify(streamCmds).xadd(
+      org.mockito.ArgumentMatchers.eq("nowchess:user:user2:events:stream"),
+      any(classOf[XAddArgs]),
+      any(),
+    )
+    verify(redis, never()).pubsub(any(classOf[Class[?]]))

modules/account/versions.env

@@ -1,3 +1,3 @@
 MAJOR=0
-MINOR=18
+MINOR=22
 PATCH=0

modules/api/CHANGELOG.md

@@ -145,3 +145,42 @@
 
 * **dependencies:** correct Jackson databind dependency group ID ([008d72d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/008d72d826707c04205bac7de25170fae5fed861))
 * IO microservice ([#38](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/38)) ([a386f57](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a386f57c21d34ead6cc6f92836c52b714597e289))
+##  (2026-06-05)
+
+### Features
+
+* **api:** define shared EventEnvelope and EventType for Redis EventBus ([#61](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/61)) ([595c172](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/595c172900da99de367c274488c3ccbeaef55882))
+* **dto:** update GameWritebackEventDto for JSON deserialization and remove unused mixin ([576e3fe](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/576e3fea9bf1082549ea53efd3288474c42be93d))
+* NCS-13 Implement Threefold Repetition ([#31](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/31)) ([767d305](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/767d3051a76c266050b6335774d66e2db2273c16))
+* NCS-14 implemented insufficient moves rule ([#30](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/30)) ([b0399a4](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/b0399a4e489950083066c9538df9a84dcc7a4613))
+* NCS-21 Write Scripts to automate certain tasks ([#15](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/15)) ([8051871](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/80518719d536a087d339fe02530825dc07f8b388))
+* NCS-25 Add linters to keep quality up ([#27](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/27)) ([fd4e67d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/fd4e67d4f782a7e955822d90cb909d0a81676fb2))
+* NCS-37 Quarkus integration ([#35](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/35)) ([f088c4e](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/f088c4e9ffcc498d3d1b6f01e8f50042d5830d55))
+* NCS-41 Bot Platform ([#33](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/33)) ([8744bee](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/8744bee2dd20966dae90a09c21a43d5b06f59e00))
+* **rule:** Rules as a microservice ([#39](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/39)) ([093134d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/093134d36c6844ba02a36a28d5d044f09291cd1d))
+* true-microservices ([#40](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/40)) ([5909242](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/590924254e8a2754de661a57a03e43f89ceb6299))
+
+### Bug Fixes
+
+* **dependencies:** correct Jackson databind dependency group ID ([008d72d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/008d72d826707c04205bac7de25170fae5fed861))
+* IO microservice ([#38](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/38)) ([a386f57](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a386f57c21d34ead6cc6f92836c52b714597e289))
+##  (2026-06-09)
+
+### Features
+
+* **api:** define shared EventEnvelope and EventType for Redis EventBus ([#61](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/61)) ([595c172](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/595c172900da99de367c274488c3ccbeaef55882))
+* **dto:** update GameWritebackEventDto for JSON deserialization and remove unused mixin ([576e3fe](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/576e3fea9bf1082549ea53efd3288474c42be93d))
+* **events:** migrate game-creation and bot flows to Redis Streams NCS-89 ([#62](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/62)) ([a24924c](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a24924c23057db3d700a75dbc4333557789cd991))
+* NCS-13 Implement Threefold Repetition ([#31](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/31)) ([767d305](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/767d3051a76c266050b6335774d66e2db2273c16))
+* NCS-14 implemented insufficient moves rule ([#30](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/30)) ([b0399a4](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/b0399a4e489950083066c9538df9a84dcc7a4613))
+* NCS-21 Write Scripts to automate certain tasks ([#15](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/15)) ([8051871](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/80518719d536a087d339fe02530825dc07f8b388))
+* NCS-25 Add linters to keep quality up ([#27](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/27)) ([fd4e67d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/fd4e67d4f782a7e955822d90cb909d0a81676fb2))
+* NCS-37 Quarkus integration ([#35](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/35)) ([f088c4e](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/f088c4e9ffcc498d3d1b6f01e8f50042d5830d55))
+* NCS-41 Bot Platform ([#33](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/33)) ([8744bee](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/8744bee2dd20966dae90a09c21a43d5b06f59e00))
+* **rule:** Rules as a microservice ([#39](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/39)) ([093134d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/093134d36c6844ba02a36a28d5d044f09291cd1d))
+* true-microservices ([#40](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/40)) ([5909242](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/590924254e8a2754de661a57a03e43f89ceb6299))
+
+### Bug Fixes
+
+* **dependencies:** correct Jackson databind dependency group ID ([008d72d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/008d72d826707c04205bac7de25170fae5fed861))
+* IO microservice ([#38](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/38)) ([a386f57](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a386f57c21d34ead6cc6f92836c52b714597e289))

modules/api/build.gradle.kts

@@ -50,6 +50,8 @@ dependencies {
         }
     }
     implementation("com.fasterxml.jackson.core:jackson-databind:${versions["JACKSON"]!!}")
+    implementation("com.fasterxml.jackson.module:jackson-module-scala_3:${versions["JACKSON_SCALA"]!!}")
+    implementation("com.fasterxml.jackson.datatype:jackson-datatype-jsr310:${versions["JACKSON"]!!}")
 
     testImplementation(platform("org.junit:junit-bom:5.13.4"))
     testImplementation("org.junit.jupiter:junit-jupiter")

modules/api/src/main/scala/de/nowchess/api/dto/GameCreationRequestDto.scala

@@ -0,0 +1,10 @@
+package de.nowchess.api.dto
+
+import de.nowchess.api.game.GameMode
+
+final case class GameCreationRequestDto(
+    white: Option[PlayerInfoDto],
+    black: Option[PlayerInfoDto],
+    timeControl: Option[TimeControlDto],
+    mode: Option[GameMode] = None,
+)

modules/api/src/main/scala/de/nowchess/api/dto/GameCreationResponseDto.scala

@@ -0,0 +1,6 @@
+package de.nowchess.api.dto
+
+final case class GameCreationResponseDto(
+    gameId: Option[String],
+    error: Option[String] = None,
+)

modules/api/src/main/scala/de/nowchess/api/event/EventEnvelope.scala

@@ -0,0 +1,27 @@
+package de.nowchess.api.event
+
+import com.fasterxml.jackson.databind.JsonNode
+import java.time.Instant
+import java.util.UUID
+
+final case class EventEnvelope(
+    eventId: UUID,
+    `type`: EventType,
+    payload: JsonNode,
+    timestamp: Instant,
+    correlationId: Option[String],
+)
+
+object EventEnvelope:
+  def of(
+      `type`: EventType,
+      payload: JsonNode,
+      correlationId: Option[String] = None,
+  ): EventEnvelope =
+    EventEnvelope(
+      eventId = UUID.randomUUID(),
+      `type` = `type`,
+      payload = payload,
+      timestamp = Instant.now(),
+      correlationId = correlationId,
+    )

modules/api/src/main/scala/de/nowchess/api/event/EventType.scala

@@ -0,0 +1,4 @@
+package de.nowchess.api.event
+
+enum EventType:
+  case GameStart, GameCreationRequest, GameCreationResponse, BotGameStart, ChallengeCreated, ChallengeAccepted, GameOver

modules/api/src/main/scala/de/nowchess/api/event/GameOverPayload.scala

@@ -0,0 +1,9 @@
+package de.nowchess.api.event
+
+final case class GameOverPayload(
+    gameId: String,
+    result: String,
+    terminationReason: String,
+    whiteId: String,
+    blackId: String,
+)

modules/api/src/test/scala/de/nowchess/api/event/EventEnvelopeTest.scala

@@ -0,0 +1,50 @@
+package de.nowchess.api.event
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import com.fasterxml.jackson.module.scala.DefaultScalaModule
+import org.scalatest.funsuite.AnyFunSuite
+import org.scalatest.matchers.should.Matchers
+
+class EventEnvelopeTest extends AnyFunSuite with Matchers:
+
+  private val mapper =
+    val m = new ObjectMapper()
+    m.registerModule(DefaultScalaModule)
+    m.findAndRegisterModules()
+    m
+
+  test("EventEnvelope round-trips through JSON") {
+    val payload = mapper.createObjectNode()
+    payload.put("gameId", "game-123")
+    payload.put("difficulty", 3)
+
+    val original = EventEnvelope.of(EventType.GameStart, payload, Some("corr-abc"))
+
+    val json    = mapper.writeValueAsString(original)
+    val decoded = mapper.readValue(json, classOf[EventEnvelope])
+
+    decoded.eventId shouldBe original.eventId
+    decoded.`type` shouldBe original.`type`
+    decoded.payload shouldBe original.payload
+    decoded.timestamp shouldBe original.timestamp
+    decoded.correlationId shouldBe Some("corr-abc")
+  }
+
+  test("EventEnvelope serializes without correlationId") {
+    val payload = mapper.createObjectNode()
+    payload.put("challengeId", "ch-1")
+
+    val envelope = EventEnvelope.of(EventType.ChallengeCreated, payload)
+    val json     = mapper.writeValueAsString(envelope)
+    val decoded  = mapper.readValue(json, classOf[EventEnvelope])
+
+    decoded.`type` shouldBe EventType.ChallengeCreated
+    decoded.correlationId shouldBe None
+  }
+
+  test("EventEnvelope.of generates unique eventIds") {
+    val payload = mapper.createObjectNode()
+    val e1      = EventEnvelope.of(EventType.BotGameStart, payload)
+    val e2      = EventEnvelope.of(EventType.BotGameStart, payload)
+    e1.eventId should not equal e2.eventId
+  }

modules/api/versions.env

@@ -1,3 +1,3 @@
 MAJOR=0
-MINOR=14
+MINOR=16
 PATCH=0

modules/bot-platform/build.gradle.kts

@@ -73,6 +73,7 @@ dependencies {
     testImplementation(platform("org.junit:junit-bom:5.13.4"))
     testImplementation("org.junit.jupiter:junit-jupiter")
     testImplementation("io.quarkus:quarkus-junit")
+    testImplementation("io.quarkus:quarkus-junit5-mockito")
     testImplementation("io.rest-assured:rest-assured")
     testImplementation("io.quarkus:quarkus-test-security")
 

modules/bot-platform/src/main/scala/de/nowchess/botplatform/registry/BotRegistry.scala

@@ -2,14 +2,18 @@ package de.nowchess.botplatform.registry
 
 import de.nowchess.botplatform.config.RedisConfig
 import io.quarkus.redis.datasource.RedisDataSource
-import io.quarkus.redis.datasource.pubsub.PubSubCommands
+import io.quarkus.redis.datasource.stream.{XGroupCreateArgs, XReadGroupArgs}
 import io.smallrye.mutiny.subscription.MultiEmitter
 import jakarta.enterprise.context.ApplicationScoped
 import jakarta.inject.Inject
+import org.eclipse.microprofile.context.ManagedExecutor
 import org.jboss.logging.Logger
 import scala.compiletime.uninitialized
+import scala.jdk.CollectionConverters.*
+import scala.util.{Failure, Success, Try}
+import java.time.Duration
+import java.util.UUID
 import java.util.concurrent.ConcurrentHashMap
-import java.util.function.Consumer
 
 @ApplicationScoped
 class BotRegistry:
@@ -17,31 +21,68 @@ class BotRegistry:
   private val log = Logger.getLogger(classOf[BotRegistry])
 
   // scalafix:off DisableSyntax.var
-  @Inject var redis: RedisDataSource   = uninitialized
-  @Inject var redisConfig: RedisConfig = uninitialized
+  @Inject var redis: RedisDataSource    = uninitialized
+  @Inject var redisConfig: RedisConfig  = uninitialized
+  @Inject var executor: ManagedExecutor = uninitialized
   // scalafix:on DisableSyntax.var
 
-  private val connections = ConcurrentHashMap[String, (MultiEmitter[? >: String], PubSubCommands.RedisSubscriber)]()
+  private val groupName  = "bot-platform-consumer"
+  private val consumerId = UUID.randomUUID().toString
+
+  private val emitters = ConcurrentHashMap[String, MultiEmitter[? >: String]]()
 
   def register(botId: String, emitter: MultiEmitter[? >: String]): Unit =
-    val channel                   = s"${redisConfig.prefix}:bot:$botId:events"
-    val handler: Consumer[String] = msg => emitter.emit(msg)
-    val subscriber                = redis.pubsub(classOf[String]).subscribe(channel, handler)
-    connections.put(botId, (emitter, subscriber))
-    log.infof("Bot %s registered", botId)
+    createGroupIfAbsent(botId)
+    emitters.put(botId, emitter)
+    executor.submit(
+      new Runnable:
+        def run(): Unit = pollLoop(botId, emitter),
+    )
+    log.infof("Bot %s registered on stream consumer group", botId)
     ()
 
   def unregister(botId: String): Unit =
-    Option(connections.remove(botId)).foreach { (_, subscriber) =>
-      subscriber.unsubscribe(s"${redisConfig.prefix}:bot:$botId:events")
-    }
+    emitters.remove(botId)
     log.infof("Bot %s unregistered", botId)
 
-  def dispatch(botId: String, event: String): Unit =
-    log.debugf("Dispatching event to bot %s", botId)
-    redis.pubsub(classOf[String]).publish(s"${redisConfig.prefix}:bot:$botId:events", event)
-    ()
-
   def registeredBots: List[String] =
-    import scala.jdk.CollectionConverters.*
-    connections.keys().asScala.toList
+    emitters.keys().asScala.toList
+
+  private def streamKey(botId: String): String =
+    s"${redisConfig.prefix}:bot:$botId:events:stream"
+
+  private def createGroupIfAbsent(botId: String): Unit =
+    Try(
+      redis
+        .stream(classOf[String])
+        .xgroupCreate(streamKey(botId), groupName, "$", new XGroupCreateArgs().mkstream()),
+    ) match
+      case Failure(ex) if Option(ex.getMessage).exists(_.contains("BUSYGROUP")) => ()
+      case Failure(ex) => log.warnf(ex, "Failed to create consumer group for bot %s", botId)
+      case Success(_)  => ()
+
+  private def pollLoop(botId: String, myEmitter: MultiEmitter[? >: String]): Unit =
+    while emitters.get(botId) eq myEmitter do
+      Try {
+        val messages = redis
+          .stream(classOf[String])
+          .xreadgroup(
+            groupName,
+            consumerId,
+            streamKey(botId),
+            ">",
+            new XReadGroupArgs().count(10).block(Duration.ofSeconds(2)),
+          )
+        Option(messages).foreach(_.forEach { msg =>
+          if emitters.get(botId) eq myEmitter then
+            myEmitter.emit(msg.payload().get("data"))
+            ack(botId, msg.id())
+        })
+      } match
+        case Failure(ex) => log.warnf(ex, "Error in poll loop for bot %s", botId)
+        case Success(_)  => ()
+
+  private def ack(botId: String, id: String): Unit =
+    Try(redis.stream(classOf[String]).xack(streamKey(botId), groupName, id)) match
+      case Failure(ex) => log.warnf(ex, "Failed to ack message %s for bot %s", id, botId)
+      case Success(_)  => ()

modules/bot-platform/src/test/scala/de/nowchess/botplatform/registry/BotRegistryTest.scala

@@ -0,0 +1,83 @@
+package de.nowchess.botplatform.registry
+
+import de.nowchess.botplatform.config.RedisConfig
+import io.quarkus.redis.datasource.RedisDataSource
+import io.quarkus.redis.datasource.stream.{StreamCommands, XGroupCreateArgs}
+import io.smallrye.mutiny.subscription.MultiEmitter
+import org.eclipse.microprofile.context.ManagedExecutor
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.function.Executable
+import org.junit.jupiter.api.{BeforeEach, Test}
+import org.mockito.ArgumentMatchers.*
+import org.mockito.Mockito.*
+
+class BotRegistryTest:
+
+  // scalafix:off DisableSyntax.var
+  private var registry: BotRegistry  = scala.compiletime.uninitialized
+  private var redis: RedisDataSource = scala.compiletime.uninitialized
+  private var streamCmds: StreamCommands[String, String, Nothing] =
+    scala.compiletime.uninitialized
+  private var redisConfig: RedisConfig  = scala.compiletime.uninitialized
+  private var executor: ManagedExecutor = scala.compiletime.uninitialized
+  // scalafix:on DisableSyntax.var
+
+  @BeforeEach
+  def setup(): Unit =
+    redis = mock(classOf[RedisDataSource])
+    streamCmds = mock(classOf[StreamCommands[String, String, Nothing]])
+    redisConfig = mock(classOf[RedisConfig])
+    executor = mock(classOf[ManagedExecutor])
+
+    when(redis.stream(classOf[String])).thenReturn(streamCmds)
+    when(redisConfig.prefix).thenReturn("nowchess")
+
+    registry = new BotRegistry
+    registry.redis = redis
+    registry.redisConfig = redisConfig
+    registry.executor = executor
+
+  @Test
+  def registerStartsPollThread(): Unit =
+    val emitter = mock(classOf[MultiEmitter[String]])
+    registry.register("bot1", emitter)
+    verify(executor).submit(any(classOf[Runnable]))
+
+  @Test
+  def registerCreatesConsumerGroupWithMkstream(): Unit =
+    val emitter = mock(classOf[MultiEmitter[String]])
+    registry.register("bot1", emitter)
+    verify(streamCmds)
+      .xgroupCreate(
+        org.mockito.ArgumentMatchers.eq("nowchess:bot:bot1:events:stream"),
+        org.mockito.ArgumentMatchers.eq("bot-platform-consumer"),
+        org.mockito.ArgumentMatchers.eq("$"),
+        any(classOf[XGroupCreateArgs]),
+      )
+
+  @Test
+  def registerTracksBot(): Unit =
+    val emitter = mock(classOf[MultiEmitter[String]])
+    registry.register("bot42", emitter)
+    assertTrue(registry.registeredBots.contains("bot42"))
+
+  @Test
+  def unregisterRemovesBot(): Unit =
+    val emitter = mock(classOf[MultiEmitter[String]])
+    registry.register("botX", emitter)
+    registry.unregister("botX")
+    assertFalse(registry.registeredBots.contains("botX"))
+
+  @Test
+  def busyGroupExceptionIsIgnoredOnRegister(): Unit =
+    val emitter = mock(classOf[MultiEmitter[String]])
+    when(streamCmds.xgroupCreate(any(), any(), any(), any()))
+      .thenThrow(new RuntimeException("BUSYGROUP Consumer Group name already exists"))
+    val exec: Executable = () => registry.register("botBusy", emitter)
+    assertDoesNotThrow(exec)
+
+  @Test
+  def registerDoesNotInteractWithPubSub(): Unit =
+    val emitter = mock(classOf[MultiEmitter[String]])
+    registry.register("botNoPubSub", emitter)
+    verify(redis, never()).pubsub(any(classOf[Class[?]]))

modules/core/CHANGELOG.md

@@ -1827,3 +1827,142 @@
 
 * Revert "feat: add authentication permissions for metrics endpoints in application.yml" ([a298417](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a298417b9e4d68dc73bbf40be63d9484536e9f83))
 * Revert "refactor: update metrics paths formatting in application.yml for clarity" ([3870566](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/38705663498d5f47c40dafe2f26198589ede8656))
+##  (2026-06-09)
+
+### Features
+
+* add authentication permissions for metrics endpoints in application.yml ([04edd4d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/04edd4d6fd8a63196c36f6d67992832febc9bebb))
+* add CORS configuration and reorder JWT settings in application.yml ([a49f9be](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a49f9be146f04c14561c305d980846a92f8c12b2))
+* add GameRules stub with PositionStatus enum ([76d4168](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/76d4168038de23e5d6083d4e8f0504fbf31d15a3))
+* add initialization metrics for various services ([d438e97](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/d438e97f32bdde0bfc63c1b4a8cc810cdd093166))
+* add MovedInCheck/Checkmate/Stalemate MoveResult variants (stub dispatch) ([8b7ec57](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/8b7ec57e5ea6ee1615a1883848a426dc07d26364))
+* add OpenTelemetry trace configuration with parentbased sampler ([3904d5a](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3904d5ad8ad4930ddee65287a7bfab785a6148f5))
+* **config:** add GameWritebackEventDto to reflection targets ([87f29a7](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/87f29a720422f538ef70699533500e060337b8ea))
+* **config:** update application.yml for PostgreSQL and remove staging/production configurations ([2404e61](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/2404e6164c3b50ffccbea5238d636060d6abe4d6))
+* **config:** update application.yml for staging and production environments ([6113432](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/6113432a14c476a3a0dfc0d449e17d023697f2ba))
+* configure logging and add OpenTelemetry support ([#49](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/49)) ([d57c488](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/d57c4886612d1d92da0e1b79209fc83e6ef537a1))
+* **events:** migrate game-creation and bot flows to Redis Streams NCS-89 ([#62](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/62)) ([a24924c](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a24924c23057db3d700a75dbc4333557789cd991))
+* implement clock expiry scanning and handling for game records ([#53](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/53)) ([8f9eb12](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/8f9eb12f663efabe4dc72b94394438652ad0ef02))
+* implement GameRules with isInCheck, legalMoves, gameStatus ([94a02ff](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/94a02ff6849436d9496c70a0f16c21666dae8e4e))
+* implement legal castling ([#1](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/1)) ([00d326c](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/00d326c1ba67711fbe180f04e1100c3f01dd0254))
+* implement periodic scaling checks and enhance instance management in AutoScaler ([3f12f69](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3f12f695f132b92f634d98df2c037292498b6e86))
+* **logging:** add DEBUG/INFO/WARN logging across services (NCS-72) ([#41](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/41)) ([804a4bf](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/804a4bf179e3dfb19e2be4390e7e543caf5237c6))
+* NCS-10 Implement Pawn Promotion ([#12](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/12)) ([13bfc16](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/13bfc16cfe25db78ec607db523ca6d993c13430c))
+* NCS-11 50-move rule ([#9](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/9)) ([412ed98](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/412ed986a95703a3b282276540153480ceed229d))
+* NCS-13 Implement Threefold Repetition ([#31](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/31)) ([767d305](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/767d3051a76c266050b6335774d66e2db2273c16))
+* NCS-14 implemented insufficient moves rule ([#30](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/30)) ([b0399a4](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/b0399a4e489950083066c9538df9a84dcc7a4613))
+* NCS-16 Core Separation via Patterns ([#10](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/10)) ([1361dfc](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/1361dfc89553b146864fb8ff3526cf12cf3f293a))
+* NCS-17 Implement basic ScalaFX UI ([#14](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/14)) ([3ff8031](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3ff80318b4f16c59733a46498581a5c27f048287))
+* NCS-21 Write Scripts to automate certain tasks ([#15](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/15)) ([8051871](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/80518719d536a087d339fe02530825dc07f8b388))
+* NCS-25 Add linters to keep quality up ([#27](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/27)) ([fd4e67d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/fd4e67d4f782a7e955822d90cb909d0a81676fb2))
+* NCS-37 Quarkus integration ([#35](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/35)) ([f088c4e](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/f088c4e9ffcc498d3d1b6f01e8f50042d5830d55))
+* NCS-40 Rework Draw System ([#34](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/34)) ([33e785d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/33e785d22af87724839b62ae91dfe74a05b398c3))
+* NCS-41 Bot Platform ([#33](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/33)) ([8744bee](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/8744bee2dd20966dae90a09c21a43d5b06f59e00))
+* NCS-53 changed IO to MicroService for easier scaling ([#37](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/37)) ([b5a2966](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/b5a2966adafa9650f0f7d601bdeb8fdd13710327))
+* NCS-6 Implementing FEN & PGN ([#7](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/7)) ([f28e69d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/f28e69dc181416aa2f221fdc4b45c2cda5efbf07))
+* NCS-78 Add Traceability to the Applications ([#48](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/48)) ([c96a09b](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/c96a09bb5cee59fc23205bb63baa8b217a7e1b00))
+* NCS-9 En passant implementation ([#8](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/8)) ([919beb3](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/919beb3b4bfa8caf2f90976a415fe9b19b7e9747))
+* **redis:** implement game writeback stream processing with error handling and retries ([ae3ef76](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/ae3ef766e8b7596a09e466cd4fb386119f17ca5c))
+* **rule:** Rules as a microservice ([#39](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/39)) ([093134d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/093134d36c6844ba02a36a28d5d044f09291cd1d))
+* true-microservices ([#40](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/40)) ([5909242](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/590924254e8a2754de661a57a03e43f89ceb6299))
+* update application.yml with new API root paths and add Micrometer and OpenTelemetry dependencies ([72ce262](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/72ce262bc491f94297700e6002fb5d0812e2cc2a))
+* wire check/checkmate/stalemate into processMove and gameLoop ([5264a22](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/5264a225418b885c5e6ea6411b96f85e38837f6c))
+
+### Bug Fixes
+
+* add missing kings to gameLoop capture test board ([aedd787](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/aedd787b77203c2af934751dba7b784eaf165032))
+* **auth:** change InternalAuthFilter to use @Singleton and add HTTP tests for secret validation ([c08d530](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/c08d5303eb9e70d36c8eebf6a061ccb71e118fe5))
+* **auth:** update InternalAuthFilter to use @ApplicationScoped and add index-dependency configuration ([6e0fd95](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/6e0fd9523e001756ce7109e639ebb54be4fcdabf))
+* **core:** add logs to trace subscribeGame call in createGame ([f5614c3](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/f5614c358255598ba1230e42a56b22934d79183c))
+* correct test board positions and captureOutput/withInput interaction ([f0481e2](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/f0481e2561b779df00925b46ee281dc36a795150))
+* **heartbeat:** inject ObjectMapper into InstanceHeartbeatService ([#42](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/42)) ([0c98151](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/0c981517da1f94cd10ae396e47bde2b35d0b3ba0))
+* IO microservice ([#38](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/38)) ([a386f57](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a386f57c21d34ead6cc6f92836c52b714597e289))
+* Lints ([dc224ab](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/dc224abe26acf5361c56956006e1cc51b75b0b7e))
+* NCS-84 More Verbose Logging ([#51](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/51)) ([4ad92ab](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/4ad92ab23698267f8faa59c4e18388d4a0042cca))
+* NCS-85 Database Writeback fails without Logs ([#52](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/52)) ([7323908](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/73239088d985f01aa6b1067ed9097a845e471d4f))
+* **pgn:** add SAN disambiguation and check/checkmate suffixes [NCS-42] ([#56](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/56)) ([2579539](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/2579539084152178f4482ddb7b84b7f1162f10da))
+* **redis:** add max pool wait time and switch to ReactiveRedisDataSource for heartbeat updates ([33e5017](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/33e5017f51a998327b180f778f73964cc10c05d3))
+* **redis:** enhance GameRedisSubscriberManager to use ReactiveRedisDataSource and improve subscription handling ([0eb752d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/0eb752d4935377f75aab710b7f4eda4b29098e6a))
+* **redis:** prevent concurrent Redis heartbeat refreshes using AtomicBoolean ([847b132](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/847b13202cb909d18ca3304c27ebe17ce2312b8e))
+* **redis:** simplify refreshRedisHeartbeat logic and ensure proper error handling ([1813ea1](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/1813ea1d2d5d093f7925f87371b5e29820bf1136))
+* **redis:** update Redis configuration with max pool size and waiting parameters ([5baf6a7](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/5baf6a7cdbea484fc49c02e2b5a1c3919b7fa2c4))
+* remove unused HTTP root-path configurations from application.yml ([3ed3e59](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3ed3e59ee456d54cd3d65ece4f36623e256b9736))
+* resolve 6 coordinator bugs (cache eviction, rebalance race, pod matching, lookup inefficiency) ([5619c82](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/5619c8223ad7091706909eda8c907a29d215fd30))
+* update documentation to reflect new functions in CoordinatorGrpcServer and InstanceRegistry ([f7ce4df](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/f7ce4df595cbdc2ef84122781f4851ff140c0f44))
+* update main class path in build configuration and adjust VCS directory mapping ([7b1f8b1](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/7b1f8b117623d327232a1a92a8a44d18582e0189))
+* update move validation to check for king safety ([#13](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/13)) ([e5e20c5](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/e5e20c566e368b12ca1dc59680c34e9112bf6762))
+
+### Reverts
+
+* Revert "feat: add authentication permissions for metrics endpoints in application.yml" ([a298417](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a298417b9e4d68dc73bbf40be63d9484536e9f83))
+* Revert "refactor: update metrics paths formatting in application.yml for clarity" ([3870566](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/38705663498d5f47c40dafe2f26198589ede8656))
+##  (2026-06-09)
+
+### Features
+
+* add authentication permissions for metrics endpoints in application.yml ([04edd4d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/04edd4d6fd8a63196c36f6d67992832febc9bebb))
+* add CORS configuration and reorder JWT settings in application.yml ([a49f9be](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a49f9be146f04c14561c305d980846a92f8c12b2))
+* add GameRules stub with PositionStatus enum ([76d4168](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/76d4168038de23e5d6083d4e8f0504fbf31d15a3))
+* add initialization metrics for various services ([d438e97](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/d438e97f32bdde0bfc63c1b4a8cc810cdd093166))
+* add MovedInCheck/Checkmate/Stalemate MoveResult variants (stub dispatch) ([8b7ec57](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/8b7ec57e5ea6ee1615a1883848a426dc07d26364))
+* add OpenTelemetry trace configuration with parentbased sampler ([3904d5a](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3904d5ad8ad4930ddee65287a7bfab785a6148f5))
+* **config:** add GameWritebackEventDto to reflection targets ([87f29a7](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/87f29a720422f538ef70699533500e060337b8ea))
+* **config:** update application.yml for PostgreSQL and remove staging/production configurations ([2404e61](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/2404e6164c3b50ffccbea5238d636060d6abe4d6))
+* **config:** update application.yml for staging and production environments ([6113432](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/6113432a14c476a3a0dfc0d449e17d023697f2ba))
+* configure logging and add OpenTelemetry support ([#49](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/49)) ([d57c488](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/d57c4886612d1d92da0e1b79209fc83e6ef537a1))
+* **events:** migrate game-creation and bot flows to Redis Streams NCS-89 ([#62](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/62)) ([a24924c](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a24924c23057db3d700a75dbc4333557789cd991))
+* implement clock expiry scanning and handling for game records ([#53](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/53)) ([8f9eb12](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/8f9eb12f663efabe4dc72b94394438652ad0ef02))
+* implement GameRules with isInCheck, legalMoves, gameStatus ([94a02ff](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/94a02ff6849436d9496c70a0f16c21666dae8e4e))
+* implement legal castling ([#1](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/1)) ([00d326c](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/00d326c1ba67711fbe180f04e1100c3f01dd0254))
+* implement periodic scaling checks and enhance instance management in AutoScaler ([3f12f69](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3f12f695f132b92f634d98df2c037292498b6e86))
+* **logging:** add DEBUG/INFO/WARN logging across services (NCS-72) ([#41](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/41)) ([804a4bf](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/804a4bf179e3dfb19e2be4390e7e543caf5237c6))
+* NCS-10 Implement Pawn Promotion ([#12](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/12)) ([13bfc16](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/13bfc16cfe25db78ec607db523ca6d993c13430c))
+* NCS-11 50-move rule ([#9](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/9)) ([412ed98](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/412ed986a95703a3b282276540153480ceed229d))
+* NCS-13 Implement Threefold Repetition ([#31](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/31)) ([767d305](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/767d3051a76c266050b6335774d66e2db2273c16))
+* NCS-14 implemented insufficient moves rule ([#30](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/30)) ([b0399a4](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/b0399a4e489950083066c9538df9a84dcc7a4613))
+* NCS-16 Core Separation via Patterns ([#10](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/10)) ([1361dfc](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/1361dfc89553b146864fb8ff3526cf12cf3f293a))
+* NCS-17 Implement basic ScalaFX UI ([#14](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/14)) ([3ff8031](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3ff80318b4f16c59733a46498581a5c27f048287))
+* NCS-21 Write Scripts to automate certain tasks ([#15](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/15)) ([8051871](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/80518719d536a087d339fe02530825dc07f8b388))
+* NCS-25 Add linters to keep quality up ([#27](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/27)) ([fd4e67d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/fd4e67d4f782a7e955822d90cb909d0a81676fb2))
+* NCS-37 Quarkus integration ([#35](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/35)) ([f088c4e](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/f088c4e9ffcc498d3d1b6f01e8f50042d5830d55))
+* NCS-40 Rework Draw System ([#34](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/34)) ([33e785d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/33e785d22af87724839b62ae91dfe74a05b398c3))
+* NCS-41 Bot Platform ([#33](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/33)) ([8744bee](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/8744bee2dd20966dae90a09c21a43d5b06f59e00))
+* NCS-53 changed IO to MicroService for easier scaling ([#37](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/37)) ([b5a2966](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/b5a2966adafa9650f0f7d601bdeb8fdd13710327))
+* NCS-6 Implementing FEN & PGN ([#7](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/7)) ([f28e69d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/f28e69dc181416aa2f221fdc4b45c2cda5efbf07))
+* NCS-78 Add Traceability to the Applications ([#48](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/48)) ([c96a09b](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/c96a09bb5cee59fc23205bb63baa8b217a7e1b00))
+* NCS-82 add Swiss-system tournament module ([#55](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/55)) ([c5661de](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/c5661de4a0ebf4b33211f5a391840dcf744656b7))
+* NCS-9 En passant implementation ([#8](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/8)) ([919beb3](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/919beb3b4bfa8caf2f90976a415fe9b19b7e9747))
+* **redis:** implement game writeback stream processing with error handling and retries ([ae3ef76](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/ae3ef766e8b7596a09e466cd4fb386119f17ca5c))
+* **rule:** Rules as a microservice ([#39](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/39)) ([093134d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/093134d36c6844ba02a36a28d5d044f09291cd1d))
+* true-microservices ([#40](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/40)) ([5909242](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/590924254e8a2754de661a57a03e43f89ceb6299))
+* update application.yml with new API root paths and add Micrometer and OpenTelemetry dependencies ([72ce262](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/72ce262bc491f94297700e6002fb5d0812e2cc2a))
+* wire check/checkmate/stalemate into processMove and gameLoop ([5264a22](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/5264a225418b885c5e6ea6411b96f85e38837f6c))
+
+### Bug Fixes
+
+* add missing kings to gameLoop capture test board ([aedd787](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/aedd787b77203c2af934751dba7b784eaf165032))
+* **auth:** change InternalAuthFilter to use @Singleton and add HTTP tests for secret validation ([c08d530](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/c08d5303eb9e70d36c8eebf6a061ccb71e118fe5))
+* **auth:** update InternalAuthFilter to use @ApplicationScoped and add index-dependency configuration ([6e0fd95](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/6e0fd9523e001756ce7109e639ebb54be4fcdabf))
+* **core:** add logs to trace subscribeGame call in createGame ([f5614c3](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/f5614c358255598ba1230e42a56b22934d79183c))
+* correct test board positions and captureOutput/withInput interaction ([f0481e2](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/f0481e2561b779df00925b46ee281dc36a795150))
+* **heartbeat:** inject ObjectMapper into InstanceHeartbeatService ([#42](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/42)) ([0c98151](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/0c981517da1f94cd10ae396e47bde2b35d0b3ba0))
+* IO microservice ([#38](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/38)) ([a386f57](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a386f57c21d34ead6cc6f92836c52b714597e289))
+* Lints ([dc224ab](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/dc224abe26acf5361c56956006e1cc51b75b0b7e))
+* NCS-84 More Verbose Logging ([#51](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/51)) ([4ad92ab](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/4ad92ab23698267f8faa59c4e18388d4a0042cca))
+* NCS-85 Database Writeback fails without Logs ([#52](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/52)) ([7323908](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/73239088d985f01aa6b1067ed9097a845e471d4f))
+* **pgn:** add SAN disambiguation and check/checkmate suffixes [NCS-42] ([#56](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/56)) ([2579539](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/2579539084152178f4482ddb7b84b7f1162f10da))
+* **redis:** add max pool wait time and switch to ReactiveRedisDataSource for heartbeat updates ([33e5017](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/33e5017f51a998327b180f778f73964cc10c05d3))
+* **redis:** enhance GameRedisSubscriberManager to use ReactiveRedisDataSource and improve subscription handling ([0eb752d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/0eb752d4935377f75aab710b7f4eda4b29098e6a))
+* **redis:** prevent concurrent Redis heartbeat refreshes using AtomicBoolean ([847b132](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/847b13202cb909d18ca3304c27ebe17ce2312b8e))
+* **redis:** simplify refreshRedisHeartbeat logic and ensure proper error handling ([1813ea1](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/1813ea1d2d5d093f7925f87371b5e29820bf1136))
+* **redis:** update Redis configuration with max pool size and waiting parameters ([5baf6a7](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/5baf6a7cdbea484fc49c02e2b5a1c3919b7fa2c4))
+* remove unused HTTP root-path configurations from application.yml ([3ed3e59](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3ed3e59ee456d54cd3d65ece4f36623e256b9736))
+* resolve 6 coordinator bugs (cache eviction, rebalance race, pod matching, lookup inefficiency) ([5619c82](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/5619c8223ad7091706909eda8c907a29d215fd30))
+* update documentation to reflect new functions in CoordinatorGrpcServer and InstanceRegistry ([f7ce4df](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/f7ce4df595cbdc2ef84122781f4851ff140c0f44))
+* update main class path in build configuration and adjust VCS directory mapping ([7b1f8b1](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/7b1f8b117623d327232a1a92a8a44d18582e0189))
+* update move validation to check for king safety ([#13](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/13)) ([e5e20c5](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/e5e20c566e368b12ca1dc59680c34e9112bf6762))
+
+### Reverts
+
+* Revert "feat: add authentication permissions for metrics endpoints in application.yml" ([a298417](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a298417b9e4d68dc73bbf40be63d9484536e9f83))
+* Revert "refactor: update metrics paths formatting in application.yml for clarity" ([3870566](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/38705663498d5f47c40dafe2f26198589ede8656))

modules/core/build.gradle.kts

@@ -138,6 +138,8 @@ tasks.withType(org.gradle.api.tasks.scala.ScalaCompile::class).configureEach {
             exclude("**/resource/GameDtoMapper.scala")
             exclude("**/resource/GameResource.scala")
             exclude("**/redis/GameRedis*.scala")
+            exclude("**/redis/GameCreationStreamListener.scala")
+            exclude("**/service/GameCreationService.scala")
         }
     }
 }

modules/core/src/main/scala/de/nowchess/chess/config/NativeReflectionConfig.scala

@@ -2,6 +2,7 @@ package de.nowchess.chess.config
 
 import de.nowchess.api.board.{CastlingRights, Color, File, Piece, PieceType, Rank, Square}
 import de.nowchess.api.dto.*
+import de.nowchess.api.event.{EventEnvelope, EventType, GameOverPayload}
 import de.nowchess.api.game.{DrawReason, GameContext, GameMode, GameResult}
 import de.nowchess.api.move.{Move, MoveType, PromotionPiece}
 import de.nowchess.chess.registry.GameCacheDto
@@ -13,6 +14,11 @@ import io.quarkus.runtime.annotations.RegisterForReflection
     classOf[GameCacheDto],
     classOf[ClockDto],
     classOf[CreateGameRequestDto],
+    classOf[GameCreationRequestDto],
+    classOf[GameCreationResponseDto],
+    classOf[EventEnvelope],
+    classOf[EventType],
+    classOf[GameOverPayload],
     classOf[ErrorEventDto],
     classOf[GameWritebackEventDto],
     classOf[GameFullDto],

modules/core/src/main/scala/de/nowchess/chess/redis/GameCreationStreamListener.scala

@@ -0,0 +1,146 @@
+package de.nowchess.chess.redis
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import de.nowchess.api.dto.{GameCreationRequestDto, GameCreationResponseDto}
+import de.nowchess.api.event.{EventEnvelope, EventType}
+import de.nowchess.chess.config.RedisConfig
+import de.nowchess.chess.service.GameCreationService
+import io.quarkus.redis.datasource.RedisDataSource
+import io.quarkus.redis.datasource.stream.{StreamMessage, XAddArgs, XGroupCreateArgs, XReadGroupArgs}
+import io.quarkus.runtime.StartupEvent
+import jakarta.enterprise.context.ApplicationScoped
+import jakarta.enterprise.event.Observes
+import jakarta.inject.Inject
+import org.eclipse.microprofile.config.inject.ConfigProperty
+import org.eclipse.microprofile.context.ManagedExecutor
+import org.jboss.logging.Logger
+import scala.compiletime.uninitialized
+import scala.jdk.CollectionConverters.*
+import scala.util.{Failure, Success, Try}
+import java.time.Duration
+import java.util.UUID
+
+@ApplicationScoped
+class GameCreationStreamListener:
+
+  // scalafix:off DisableSyntax.var
+  @Inject var redis: RedisDataSource               = uninitialized
+  @Inject var objectMapper: ObjectMapper           = uninitialized
+  @Inject var creationService: GameCreationService = uninitialized
+  @Inject var executor: ManagedExecutor            = uninitialized
+  @Inject var redisConfig: RedisConfig             = uninitialized
+  @ConfigProperty(name = "nowchess.game-creation-stream.enabled", defaultValue = "true")
+  private var streamEnabled: Boolean = true
+  // scalafix:on DisableSyntax.var
+
+  private val log          = Logger.getLogger(classOf[GameCreationStreamListener])
+  private val groupName    = "core-game-creation"
+  private val consumerId   = UUID.randomUUID().toString
+  private val maxRetries   = 3
+  private val maxStreamLen = 1000L
+
+  private def requestStream: String  = s"${redisConfig.prefix}:game-creation"
+  private def responseStream: String = s"${redisConfig.prefix}:game-creation-response"
+  private def dlqStream: String      = s"${redisConfig.prefix}:dlq"
+
+  def start(@Observes _ev: StartupEvent): Unit =
+    if streamEnabled then
+      createGroupIfAbsent()
+      executor.submit(
+        new Runnable:
+          def run(): Unit = pollLoop(),
+      )
+      log.infof("Game-creation request listener started (consumer=%s)", consumerId)
+
+  private def createGroupIfAbsent(): Unit =
+    Try(
+      redis
+        .stream(classOf[String])
+        .xgroupCreate(requestStream, groupName, "0", new XGroupCreateArgs().mkstream()),
+    ) match
+      case Failure(ex) if Option(ex.getMessage).exists(_.contains("BUSYGROUP")) => ()
+      case Failure(ex) => log.warnf(ex, "Failed to create game-creation consumer group")
+      case Success(_)  => ()
+
+  private def pollLoop(): Unit =
+    while true do
+      Try {
+        val messages = redis
+          .stream(classOf[String])
+          .xreadgroup(
+            groupName,
+            consumerId,
+            requestStream,
+            ">",
+            new XReadGroupArgs().count(10).block(Duration.ofSeconds(2)),
+          )
+        Option(messages).foreach(_.forEach(handleMessage))
+      } match
+        case Failure(ex) => log.warnf(ex, "Error in game-creation poll loop")
+        case Success(_)  => ()
+
+  private def handleMessage(msg: StreamMessage[String, String, String]): Unit =
+    val json    = msg.payload().get("data")
+    val attempt = Option(msg.payload().get("attempt")).flatMap(_.toIntOption).getOrElse(0)
+    Try(objectMapper.readValue(json, classOf[EventEnvelope])) match
+      case Failure(ex) =>
+        log.errorf(ex, "Unparseable game-creation event, sending to DLQ: %s", json)
+        toDlq(EventType.GameCreationRequest.toString, json, ex, attempt)
+        ack(msg.id())
+      case Success(envelope) =>
+        processEnvelope(msg, envelope, json, attempt)
+
+  private def processEnvelope(
+      msg: StreamMessage[String, String, String],
+      envelope: EventEnvelope,
+      json: String,
+      attempt: Int,
+  ): Unit =
+    Try {
+      val req   = objectMapper.treeToValue(envelope.payload, classOf[GameCreationRequestDto])
+      val entry = creationService.createGame(req)
+      publishResponse(envelope.correlationId, GameCreationResponseDto(Some(entry.gameId)))
+    } match
+      case Success(_) => ack(msg.id())
+      case Failure(ex) if attempt + 1 < maxRetries =>
+        log.warnf(ex, "Game creation failed (attempt %d), retrying", attempt)
+        retry(json, attempt + 1)
+        ack(msg.id())
+      case Failure(ex) =>
+        log.errorf(ex, "Game creation failed after %d attempts, sending to DLQ", maxRetries)
+        publishResponse(envelope.correlationId, GameCreationResponseDto(None, Some("Game creation failed")))
+        toDlq(envelope.`type`.toString, json, ex, attempt)
+        ack(msg.id())
+
+  private def publishResponse(correlationId: Option[String], resp: GameCreationResponseDto): Unit =
+    val payload  = objectMapper.valueToTree[com.fasterxml.jackson.databind.JsonNode](resp)
+    val envelope = EventEnvelope.of(EventType.GameCreationResponse, payload, correlationId)
+    xadd(responseStream, Map("data" -> objectMapper.writeValueAsString(envelope)))
+
+  private def retry(json: String, attempt: Int): Unit =
+    xadd(requestStream, Map("data" -> json, "attempt" -> attempt.toString))
+
+  private def toDlq(eventType: String, json: String, error: Throwable, attempt: Int): Unit =
+    xadd(
+      dlqStream,
+      Map(
+        "data"      -> json,
+        "eventType" -> eventType,
+        "error"     -> Option(error.getMessage).getOrElse(error.getClass.getName),
+        "attempt"   -> (attempt + 1).toString,
+      ),
+    )
+
+  private def ack(id: String): Unit =
+    Try(redis.stream(classOf[String]).xack(requestStream, groupName, id)) match
+      case Failure(ex) => log.warnf(ex, "Failed to ack message %s", id)
+      case Success(_)  => ()
+
+  private def xadd(key: String, fields: Map[String, String]): Unit =
+    Try(
+      redis
+        .stream(classOf[String])
+        .xadd(key, new XAddArgs().maxlen(maxStreamLen).nearlyExactTrimming(), fields.asJava),
+    ) match
+      case Failure(ex) => log.errorf(ex, "Failed to publish to stream %s", key)
+      case Success(_)  => ()

modules/core/src/main/scala/de/nowchess/chess/redis/GameRedisPublisher.scala

@@ -1,15 +1,18 @@
 package de.nowchess.chess.redis
 
-import com.fasterxml.jackson.databind.ObjectMapper
-import de.nowchess.api.dto.{GameStateDto, GameStateEventDto, GameWritebackEventDto}
-import de.nowchess.api.game.{CorrespondenceClockState, DrawReason, GameResult, LiveClockState, TimeControl, WinReason}
+import com.fasterxml.jackson.databind.{JsonNode, ObjectMapper}
 import de.nowchess.api.board.Color
+import de.nowchess.api.dto.{GameStateDto, GameStateEventDto, GameWritebackEventDto}
+import de.nowchess.api.event.{EventEnvelope, EventType, GameOverPayload}
+import de.nowchess.api.game.{CorrespondenceClockState, DrawReason, GameResult, LiveClockState, TimeControl, WinReason}
 import de.nowchess.chess.grpc.IoGrpcClientWrapper
 import de.nowchess.chess.observer.{GameEvent, Observer}
 import de.nowchess.chess.registry.{GameEntry, GameRegistry}
 import de.nowchess.chess.resource.GameDtoMapper
 import io.quarkus.redis.datasource.RedisDataSource
+import io.quarkus.redis.datasource.stream.XAddArgs
 import org.jboss.logging.Logger
+import scala.jdk.CollectionConverters.*
 
 object GameRedisPublisher:
   private val log = Logger.getLogger(classOf[GameRedisPublisher])
@@ -23,8 +26,11 @@ class GameRedisPublisher(
     writebackEmit: String => Unit,
     ioClient: IoGrpcClientWrapper,
     onGameOver: String => Unit,
+    redisPrefix: String,
 ) extends Observer:
 
+  private val maxStreamLen = 1000L
+
   def emitInitialWriteback(): Unit =
     try
       registry.get(gameId).foreach { entry =>
@@ -40,10 +46,39 @@ class GameRedisPublisher(
         val dto = GameDtoMapper.toGameStateDto(entry, ioClient)
         redis.pubsub(classOf[String]).publish(s2cTopicName, objectMapper.writeValueAsString(GameStateEventDto(dto)))
         writebackEmit(objectMapper.writeValueAsString(buildWriteback(entry, dto)))
-        if entry.engine.context.result.isDefined then onGameOver(gameId)
+        entry.engine.context.result.foreach { result =>
+          publishGameOver(entry, result)
+          onGameOver(gameId)
+        }
       }
     catch case ex: Exception => GameRedisPublisher.log.warnf(ex, "Failed to publish game event for game %s", gameId)
 
+  private def publishGameOver(entry: GameEntry, result: GameResult): Unit =
+    val resultStr = result match
+      case GameResult.Win(Color.White, _) => "white"
+      case GameResult.Win(Color.Black, _) => "black"
+      case GameResult.Draw(_)             => "draw"
+    val terminationReason = result match
+      case GameResult.Win(_, WinReason.Checkmate)           => "checkmate"
+      case GameResult.Win(_, WinReason.Resignation)         => "resignation"
+      case GameResult.Win(_, WinReason.TimeControl)         => "timeout"
+      case GameResult.Draw(DrawReason.Stalemate)            => "stalemate"
+      case GameResult.Draw(DrawReason.InsufficientMaterial) => "insufficient_material"
+      case GameResult.Draw(DrawReason.FiftyMoveRule)        => "fifty_move"
+      case GameResult.Draw(DrawReason.ThreefoldRepetition)  => "repetition"
+      case GameResult.Draw(DrawReason.Agreement)            => "agreement"
+    val payload = objectMapper.valueToTree[JsonNode](
+      GameOverPayload(gameId, resultStr, terminationReason, entry.white.id.value, entry.black.id.value),
+    )
+    val envelope = EventEnvelope.of(EventType.GameOver, payload)
+    redis
+      .stream(classOf[String])
+      .xadd(
+        s"$redisPrefix:game-over",
+        new XAddArgs().maxlen(maxStreamLen).nearlyExactTrimming(),
+        Map("data" -> objectMapper.writeValueAsString(envelope)).asJava,
+      )
+
   private def buildWriteback(entry: GameEntry, dto: GameStateDto): GameWritebackEventDto =
     val clock = entry.engine.currentClockState
     GameWritebackEventDto(

modules/core/src/main/scala/de/nowchess/chess/redis/GameRedisSubscriberManager.scala

@@ -22,7 +22,7 @@ import org.jboss.logging.Logger
 import scala.compiletime.uninitialized
 import scala.jdk.CollectionConverters.*
 import scala.util.Try
-import java.util.concurrent.ConcurrentHashMap
+import java.util.concurrent.{ConcurrentHashMap, ExecutorService, Executors}
 import java.util.function.Consumer
 
 @ApplicationScoped
@@ -46,6 +46,10 @@ class GameRedisSubscriberManager:
 
   private val c2sListeners = new ConcurrentHashMap[String, ReactivePubSubCommands.ReactiveRedisSubscriber]()
   private val s2cObservers = new ConcurrentHashMap[String, Observer]()
+  // Per-game single-thread executor so c2s messages are handled off the Vert.x
+  // event loop (handleConnected/handleMove make blocking gRPC + Redis calls) while
+  // staying ordered per game.
+  private val c2sExecutors = new ConcurrentHashMap[String, ExecutorService]()
 
   // scalafix:off DisableSyntax.var
   private var clockExpireSubscriber: Option[ReactivePubSubCommands.ReactiveRedisSubscriber] = None
@@ -89,13 +93,21 @@ class GameRedisSubscriberManager:
       writebackFn,
       ioClient,
       unsubscribeGame,
+      redisConfig.prefix,
     )
     s2cObservers.put(gameId, obs)
     registry.get(gameId).foreach(_.engine.subscribe(obs))
     obs.emitInitialWriteback()
     heartbeatServiceOpt.foreach(_.addGameSubscription(gameId))
 
-    val handler: Consumer[String] = msg => handleC2sMessage(gameId, msg)
+    val executor = c2sExecutors.computeIfAbsent(gameId, _ => Executors.newSingleThreadExecutor())
+    val handler: Consumer[String] = msg =>
+      val task = new Runnable:
+        def run(): Unit =
+          try handleC2sMessage(gameId, msg)
+          catch case ex: Exception => log.warnf(ex, "Error handling c2s message for game %s", gameId)
+      Try(executor.execute(task))
+      ()
     try
       val subscriber = reactiveRedis
         .pubsub(classOf[String])
@@ -106,6 +118,16 @@ class GameRedisSubscriberManager:
       log.debugf("Subscribed to game %s", gameId)
     catch case ex: Exception => log.warnf(ex, "Redis subscription failed for game %s", gameId)
 
+  // Notify the official-bots service to start playing a side of a game. Mirrors
+  // the event the tournament service publishes; official-bots subscribes to
+  // "<prefix>:bot:*:events".
+  def publishBotGameStart(gameId: String, botId: String, playingAs: String): Unit =
+    val channel = s"${redisConfig.prefix}:bot:$botId:events"
+    val payload = s"""{"type":"gameStart","gameId":"$gameId","playingAs":"$playingAs","botAccountId":"$botId"}"""
+    Try(redis.pubsub(classOf[String]).publish(channel, payload)) match
+      case scala.util.Failure(ex) => log.warnf(ex, "Failed to publish bot gameStart for game %s", gameId)
+      case scala.util.Success(_)  => ()
+
   def unsubscribeGame(gameId: String): Unit =
     Option(c2sListeners.remove(gameId)).foreach { subscriber =>
       subscriber.unsubscribe(c2sTopic(gameId)).subscribe().`with`(_ => (), _ => ())
@@ -113,6 +135,7 @@ class GameRedisSubscriberManager:
     Option(s2cObservers.remove(gameId)).foreach { obs =>
       registry.get(gameId).foreach(_.engine.unsubscribe(obs))
     }
+    Option(c2sExecutors.remove(gameId)).foreach(_.shutdownNow())
 
     heartbeatServiceOpt.foreach(_.removeGameSubscription(gameId))
     log.debugf("Unsubscribed from game %s", gameId)
@@ -187,3 +210,4 @@ class GameRedisSubscriberManager:
     clockExpireSubscriber.foreach(_.unsubscribe(clockExpireChannel).await().indefinitely())
     c2sListeners.forEach((gameId, subscriber) => subscriber.unsubscribe(c2sTopic(gameId)).await().indefinitely())
     s2cObservers.forEach((gameId, obs) => registry.get(gameId).foreach(_.engine.unsubscribe(obs)))
+    c2sExecutors.forEach((_, executor) => executor.shutdownNow())

modules/core/src/main/scala/de/nowchess/chess/resource/GameResource.scala

@@ -25,6 +25,7 @@ import de.nowchess.chess.observer.*
 import de.nowchess.chess.redis.GameRedisSubscriberManager
 import de.nowchess.chess.registry.{GameEntry, GameRegistry}
 import de.nowchess.security.InternalOnly
+import jakarta.annotation.security.PermitAll
 import jakarta.enterprise.context.ApplicationScoped
 import jakarta.inject.Inject
 import jakarta.ws.rs.*
@@ -179,6 +180,32 @@ class GameResource:
     )
     created(GameDtoMapper.toGameFullDto(entry, ioClient))
 
+  // Player-facing game creation for "play vs bot". Unlike createGame this is not
+  // internal-only: a logged-in (or anonymous) player creates the game directly,
+  // and core notifies the official-bots service to play the bot side.
+  @POST
+  @Path("/vs-bot")
+  @PermitAll
+  @Consumes(Array(MediaType.APPLICATION_JSON))
+  @Produces(Array(MediaType.APPLICATION_JSON))
+  def createBotGame(body: CreateGameRequestDto): Response =
+    val req   = Option(body).getOrElse(CreateGameRequestDto(None, None, None, None))
+    val white = playerInfoFrom(req.white, DefaultWhite)
+    val black = playerInfoFrom(req.black, DefaultBlack)
+    val tc    = toTimeControl(req.timeControl)
+    val entry = newEntry(GameContext.initial, white, black, tc, GameMode.Open)
+    registry.store(entry)
+    subscriberManager.subscribeGame(entry.gameId)
+    notifyBotSide(entry)
+    log.infof("Bot game %s created — white=%s black=%s", entry.gameId, white.displayName, black.displayName)
+    created(GameDtoMapper.toGameFullDto(entry, ioClient))
+
+  private def notifyBotSide(entry: GameEntry): Unit =
+    if entry.black.id.value.startsWith("bot-") then
+      subscriberManager.publishBotGameStart(entry.gameId, entry.black.id.value, "black")
+    else if entry.white.id.value.startsWith("bot-") then
+      subscriberManager.publishBotGameStart(entry.gameId, entry.white.id.value, "white")
+
   @GET
   @Path("/{gameId}")
   @Produces(Array(MediaType.APPLICATION_JSON))

modules/core/src/main/scala/de/nowchess/chess/service/GameCreationService.scala

@@ -0,0 +1,71 @@
+package de.nowchess.chess.service
+
+import de.nowchess.api.dto.{GameCreationRequestDto, PlayerInfoDto, TimeControlDto}
+import de.nowchess.api.game.{GameContext, GameMode, TimeControl}
+import de.nowchess.api.player.{PlayerId, PlayerInfo}
+import de.nowchess.chess.engine.GameEngine
+import de.nowchess.chess.grpc.RuleSetGrpcAdapter
+import de.nowchess.chess.redis.GameRedisSubscriberManager
+import de.nowchess.chess.registry.{GameEntry, GameRegistry}
+import jakarta.enterprise.context.ApplicationScoped
+import jakarta.inject.Inject
+import org.jboss.logging.Logger
+import scala.compiletime.uninitialized
+
+@ApplicationScoped
+class GameCreationService:
+
+  private val log = Logger.getLogger(classOf[GameCreationService])
+
+  // scalafix:off DisableSyntax.var
+  @Inject var registry: GameRegistry                        = uninitialized
+  @Inject var ruleSetAdapter: RuleSetGrpcAdapter            = uninitialized
+  @Inject var subscriberManager: GameRedisSubscriberManager = uninitialized
+  // scalafix:on DisableSyntax.var
+
+  private val DefaultWhite = PlayerInfo(PlayerId("p1"), "Player 1")
+  private val DefaultBlack = PlayerInfo(PlayerId("p2"), "Player 2")
+
+  def createGame(req: GameCreationRequestDto): GameEntry =
+    val white = playerInfoFrom(req.white, DefaultWhite)
+    val black = playerInfoFrom(req.black, DefaultBlack)
+    val tc    = toTimeControl(req.timeControl)
+    val mode  = req.mode.getOrElse(GameMode.Open)
+    val entry = newEntry(GameContext.initial, white, black, tc, mode)
+    registry.store(entry)
+    subscriberManager.subscribeGame(entry.gameId)
+    log.infof(
+      "Game %s created — white=%s black=%s mode=%s",
+      entry.gameId,
+      white.displayName,
+      black.displayName,
+      mode.toString,
+    )
+    entry
+
+  private def playerInfoFrom(dto: Option[PlayerInfoDto], default: PlayerInfo): PlayerInfo =
+    dto.fold(default)(d => PlayerInfo(PlayerId(d.id), d.displayName))
+
+  private def toTimeControl(dto: Option[TimeControlDto]): TimeControl =
+    dto match
+      case None => TimeControl.Unlimited
+      case Some(tc) =>
+        tc.daysPerMove match
+          case Some(d) => TimeControl.Correspondence(d)
+          case None =>
+            tc.limitSeconds.fold(TimeControl.Unlimited)(l => TimeControl.Clock(l, tc.incrementSeconds.getOrElse(0)))
+
+  private def newEntry(
+      ctx: GameContext,
+      white: PlayerInfo,
+      black: PlayerInfo,
+      tc: TimeControl,
+      mode: GameMode,
+  ): GameEntry =
+    GameEntry(
+      registry.generateId(),
+      GameEngine(initialContext = ctx, ruleSet = ruleSetAdapter, timeControl = tc),
+      white,
+      black,
+      mode = mode,
+    )

modules/core/src/test/resources/application.yml

@@ -18,6 +18,8 @@ nowchess:
       enabled: false
   coordinator:
     enabled: false
+  game-creation-stream:
+    enabled: false
   redis:
     host: localhost
     port: 6379

modules/core/src/test/scala/de/nowchess/chess/redis/GameRedisPublisherTest.scala

@@ -0,0 +1,123 @@
+package de.nowchess.chess.redis
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule
+import de.nowchess.api.board.Color
+import de.nowchess.api.game.{DrawReason, GameContext, GameResult, WinReason}
+import de.nowchess.api.player.{PlayerId, PlayerInfo}
+import de.nowchess.chess.client.CombinedExportResponse
+import de.nowchess.chess.engine.GameEngine
+import de.nowchess.chess.grpc.IoGrpcClientWrapper
+import de.nowchess.chess.observer.GameEvent
+import de.nowchess.chess.registry.{GameEntry, GameRegistry}
+import de.nowchess.rules.sets.DefaultRules
+import io.quarkus.redis.datasource.RedisDataSource
+import io.quarkus.redis.datasource.pubsub.PubSubCommands
+import io.quarkus.redis.datasource.stream.{StreamCommands, XAddArgs}
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.{BeforeEach, Test}
+import org.mockito.ArgumentMatchers.*
+import org.mockito.Mockito.*
+import scala.compiletime.uninitialized
+
+class GameRedisPublisherTest:
+
+  // scalafix:off DisableSyntax.var
+  private var redis: RedisDataSource                              = uninitialized
+  private var streamCmds: StreamCommands[String, String, Nothing] = uninitialized
+  private var pubsubCmds: PubSubCommands[String]                  = uninitialized
+  private var registry: GameRegistry                              = uninitialized
+  private var ioClient: IoGrpcClientWrapper                       = uninitialized
+  private var onGameOverCalled: Boolean                           = false
+  // scalafix:on DisableSyntax.var
+
+  private val objectMapper = new ObjectMapper().registerModule(new JavaTimeModule())
+  private val gameId       = "game1"
+  private val whitePlayer  = PlayerInfo(PlayerId("white1"), "Alice")
+  private val blackPlayer  = PlayerInfo(PlayerId("black1"), "Bob")
+
+  @BeforeEach
+  def setup(): Unit =
+    redis = mock(classOf[RedisDataSource])
+    streamCmds = mock(classOf[StreamCommands[String, String, Nothing]])
+    pubsubCmds = mock(classOf[PubSubCommands[String]])
+    registry = mock(classOf[GameRegistry])
+    ioClient = mock(classOf[IoGrpcClientWrapper])
+    when(redis.stream(classOf[String])).thenReturn(streamCmds)
+    when(redis.pubsub(classOf[String])).thenReturn(pubsubCmds)
+    when(ioClient.exportCombined(any()))
+      .thenReturn(CombinedExportResponse("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1", ""))
+    onGameOverCalled = false
+
+  private def publisherWithResult(result: GameResult): GameRedisPublisher =
+    val ctx    = GameContext.initial.copy(result = Some(result))
+    val engine = new GameEngine(initialContext = ctx, ruleSet = DefaultRules)
+    val entry  = GameEntry(gameId, engine, whitePlayer, blackPlayer)
+    when(registry.get(gameId)).thenReturn(Some(entry))
+    new GameRedisPublisher(
+      gameId,
+      registry,
+      redis,
+      objectMapper,
+      s"nowchess:game:$gameId:s2c",
+      _ => (),
+      ioClient,
+      _ => onGameOverCalled = true,
+      "nowchess",
+    )
+
+  @Test
+  def publishesGameOverOnCheckmate(): Unit =
+    val publisher = publisherWithResult(GameResult.Win(Color.White, WinReason.Checkmate))
+    publisher.onGameEvent(mock(classOf[GameEvent]))
+    verify(streamCmds).xadd(
+      org.mockito.ArgumentMatchers.eq("nowchess:game-over"),
+      any(classOf[XAddArgs]),
+      any(),
+    )
+    assertTrue(onGameOverCalled)
+
+  @Test
+  def publishesGameOverOnResignation(): Unit =
+    val publisher = publisherWithResult(GameResult.Win(Color.Black, WinReason.Resignation))
+    publisher.onGameEvent(mock(classOf[GameEvent]))
+    verify(streamCmds).xadd(
+      org.mockito.ArgumentMatchers.eq("nowchess:game-over"),
+      any(classOf[XAddArgs]),
+      any(),
+    )
+
+  @Test
+  def publishesGameOverOnDraw(): Unit =
+    val publisher = publisherWithResult(GameResult.Draw(DrawReason.Agreement))
+    publisher.onGameEvent(mock(classOf[GameEvent]))
+    verify(streamCmds).xadd(
+      org.mockito.ArgumentMatchers.eq("nowchess:game-over"),
+      any(classOf[XAddArgs]),
+      any(),
+    )
+
+  @Test
+  def doesNotPublishGameOverWhenNoResult(): Unit =
+    val ctx    = GameContext.initial
+    val engine = new GameEngine(initialContext = ctx, ruleSet = DefaultRules)
+    val entry  = GameEntry(gameId, engine, whitePlayer, blackPlayer)
+    when(registry.get(gameId)).thenReturn(Some(entry))
+    val publisher = new GameRedisPublisher(
+      gameId,
+      registry,
+      redis,
+      objectMapper,
+      s"nowchess:game:$gameId:s2c",
+      _ => (),
+      ioClient,
+      _ => onGameOverCalled = true,
+      "nowchess",
+    )
+    publisher.onGameEvent(mock(classOf[GameEvent]))
+    verify(streamCmds, never()).xadd(
+      org.mockito.ArgumentMatchers.eq("nowchess:game-over"),
+      any(classOf[XAddArgs]),
+      any(),
+    )
+    assertFalse(onGameOverCalled)

modules/core/src/test/scala/de/nowchess/chess/service/GameCreationServiceTest.scala

@@ -0,0 +1,68 @@
+package de.nowchess.chess.service
+
+import de.nowchess.api.dto.{GameCreationRequestDto, PlayerInfoDto, TimeControlDto}
+import de.nowchess.api.game.{GameMode, TimeControl}
+import de.nowchess.api.player.PlayerType
+import de.nowchess.chess.client.CombinedExportResponse
+import de.nowchess.chess.grpc.IoGrpcClientWrapper
+import de.nowchess.chess.redis.GameRedisSubscriberManager
+import io.quarkus.test.InjectMock
+import io.quarkus.test.junit.QuarkusTest
+import jakarta.inject.Inject
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.{BeforeEach, DisplayName, Test}
+import org.mockito.ArgumentMatchers.any
+import org.mockito.Mockito.{verify, when}
+import scala.compiletime.uninitialized
+
+// scalafix:off
+@QuarkusTest
+@DisplayName("GameCreationService")
+class GameCreationServiceTest:
+
+  @Inject
+  var service: GameCreationService = uninitialized
+
+  @InjectMock
+  var subscriberManager: GameRedisSubscriberManager = uninitialized
+
+  @InjectMock
+  var ioWrapper: IoGrpcClientWrapper = uninitialized
+
+  @BeforeEach
+  def setup(): Unit =
+    when(ioWrapper.exportCombined(any()))
+      .thenReturn(CombinedExportResponse("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1", ""))
+
+  private def player(id: String, name: String): PlayerInfoDto =
+    PlayerInfoDto(id, name, PlayerType.Human)
+
+  @Test
+  def createsGameAndSubscribes(): Unit =
+    val req =
+      GameCreationRequestDto(Some(player("w", "White")), Some(player("b", "Black")), None, Some(GameMode.Authenticated))
+    val entry = service.createGame(req)
+    assertNotNull(entry.gameId)
+    assertEquals("White", entry.white.displayName)
+    assertEquals("Black", entry.black.displayName)
+    assertEquals(GameMode.Authenticated, entry.mode)
+    verify(subscriberManager).subscribeGame(entry.gameId)
+
+  @Test
+  def defaultsToOpenModeAndDefaultPlayers(): Unit =
+    val entry = service.createGame(GameCreationRequestDto(None, None, None, None))
+    assertEquals(GameMode.Open, entry.mode)
+    assertEquals("Player 1", entry.white.displayName)
+    assertEquals("Player 2", entry.black.displayName)
+
+  @Test
+  def mapsClockTimeControl(): Unit =
+    val tc    = TimeControlDto(Some(300), Some(5), None)
+    val entry = service.createGame(GameCreationRequestDto(None, None, Some(tc), None))
+    assertEquals(TimeControl.Clock(300, 5), entry.engine.timeControl)
+
+  @Test
+  def mapsCorrespondenceTimeControl(): Unit =
+    val tc    = TimeControlDto(None, None, Some(3))
+    val entry = service.createGame(GameCreationRequestDto(None, None, Some(tc), None))
+    assertEquals(TimeControl.Correspondence(3), entry.engine.timeControl)

modules/core/versions.env

@@ -1,3 +1,3 @@
 MAJOR=0
-MINOR=47
+MINOR=49
 PATCH=0

modules/official-bots/CHANGELOG.md

@@ -156,3 +156,75 @@
 ### Reverts
 
 * Revert "refactor: update metrics paths formatting in application.yml for clarity" ([3870566](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/38705663498d5f47c40dafe2f26198589ede8656))
+##  (2026-06-03)
+
+### Features
+
+* add initialization metrics for various services ([d438e97](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/d438e97f32bdde0bfc63c1b4a8cc810cdd093166))
+* add OpenTelemetry trace configuration with parentbased sampler ([3904d5a](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3904d5ad8ad4930ddee65287a7bfab785a6148f5))
+* **config:** update application.yml for PostgreSQL and remove staging/production configurations ([2404e61](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/2404e6164c3b50ffccbea5238d636060d6abe4d6))
+* **config:** update application.yml for staging and production environments ([6113432](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/6113432a14c476a3a0dfc0d449e17d023697f2ba))
+* configure logging and add OpenTelemetry support ([#49](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/49)) ([d57c488](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/d57c4886612d1d92da0e1b79209fc83e6ef537a1))
+* **docker:** add .dockerignore and .gitignore files for build exclusions ([c987d8e](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/c987d8e258c0e6c4cfbdaa8381c64c410d7a2b83))
+* **docker:** add Dockerfiles for building Quarkus application in native and JVM modes ([3f2d2bb](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3f2d2bb4c97fa8cddba66e1da4427c54236dfeed))
+* **docker:** add Dockerfiles for Quarkus application in JVM and native modes ([34b9933](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/34b993304670cf2aa62cd2f6460cee7b9864b08e))
+* NCS-78 Add Traceability to the Applications ([#46](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/46)) ([649566e](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/649566eb3fcf38f91c8896a739f74ea318af312d))
+* NCS-78 Add Traceability to the Applications ([#47](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/47)) ([87dfc6c](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/87dfc6c2bcce7f7d58fc641bd8d468a2e584c108))
+* true-microservices ([#40](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/40)) ([5909242](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/590924254e8a2754de661a57a03e43f89ceb6299))
+
+### Bug Fixes
+
+* **official-bots:** NCS-70-auto-register official bots with account service ([#59](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/59)) ([7117a93](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/7117a93376272094d0b1a6abf2121254ce396684))
+
+### Reverts
+
+* Revert "refactor: update metrics paths formatting in application.yml for clarity" ([3870566](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/38705663498d5f47c40dafe2f26198589ede8656))
+##  (2026-06-09)
+
+### Features
+
+* add initialization metrics for various services ([d438e97](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/d438e97f32bdde0bfc63c1b4a8cc810cdd093166))
+* add OpenTelemetry trace configuration with parentbased sampler ([3904d5a](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3904d5ad8ad4930ddee65287a7bfab785a6148f5))
+* **config:** update application.yml for PostgreSQL and remove staging/production configurations ([2404e61](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/2404e6164c3b50ffccbea5238d636060d6abe4d6))
+* **config:** update application.yml for staging and production environments ([6113432](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/6113432a14c476a3a0dfc0d449e17d023697f2ba))
+* configure logging and add OpenTelemetry support ([#49](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/49)) ([d57c488](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/d57c4886612d1d92da0e1b79209fc83e6ef537a1))
+* **docker:** add .dockerignore and .gitignore files for build exclusions ([c987d8e](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/c987d8e258c0e6c4cfbdaa8381c64c410d7a2b83))
+* **docker:** add Dockerfiles for building Quarkus application in native and JVM modes ([3f2d2bb](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3f2d2bb4c97fa8cddba66e1da4427c54236dfeed))
+* **docker:** add Dockerfiles for Quarkus application in JVM and native modes ([34b9933](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/34b993304670cf2aa62cd2f6460cee7b9864b08e))
+* **events:** migrate game-creation and bot flows to Redis Streams NCS-89 ([#62](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/62)) ([a24924c](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a24924c23057db3d700a75dbc4333557789cd991))
+* NCS-78 Add Traceability to the Applications ([#46](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/46)) ([649566e](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/649566eb3fcf38f91c8896a739f74ea318af312d))
+* NCS-78 Add Traceability to the Applications ([#47](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/47)) ([87dfc6c](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/87dfc6c2bcce7f7d58fc641bd8d468a2e584c108))
+* true-microservices ([#40](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/40)) ([5909242](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/590924254e8a2754de661a57a03e43f89ceb6299))
+
+### Bug Fixes
+
+* **official-bots:** NCS-70-auto-register official bots with account service ([#59](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/59)) ([7117a93](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/7117a93376272094d0b1a6abf2121254ce396684))
+
+### Reverts
+
+* Revert "refactor: update metrics paths formatting in application.yml for clarity" ([3870566](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/38705663498d5f47c40dafe2f26198589ede8656))
+##  (2026-06-09)
+
+### Features
+
+* add initialization metrics for various services ([d438e97](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/d438e97f32bdde0bfc63c1b4a8cc810cdd093166))
+* add OpenTelemetry trace configuration with parentbased sampler ([3904d5a](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3904d5ad8ad4930ddee65287a7bfab785a6148f5))
+* **config:** update application.yml for PostgreSQL and remove staging/production configurations ([2404e61](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/2404e6164c3b50ffccbea5238d636060d6abe4d6))
+* **config:** update application.yml for staging and production environments ([6113432](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/6113432a14c476a3a0dfc0d449e17d023697f2ba))
+* configure logging and add OpenTelemetry support ([#49](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/49)) ([d57c488](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/d57c4886612d1d92da0e1b79209fc83e6ef537a1))
+* **docker:** add .dockerignore and .gitignore files for build exclusions ([c987d8e](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/c987d8e258c0e6c4cfbdaa8381c64c410d7a2b83))
+* **docker:** add Dockerfiles for building Quarkus application in native and JVM modes ([3f2d2bb](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3f2d2bb4c97fa8cddba66e1da4427c54236dfeed))
+* **docker:** add Dockerfiles for Quarkus application in JVM and native modes ([34b9933](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/34b993304670cf2aa62cd2f6460cee7b9864b08e))
+* **events:** migrate game-creation and bot flows to Redis Streams NCS-89 ([#62](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/62)) ([a24924c](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/a24924c23057db3d700a75dbc4333557789cd991))
+* NCS-78 Add Traceability to the Applications ([#46](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/46)) ([649566e](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/649566eb3fcf38f91c8896a739f74ea318af312d))
+* NCS-78 Add Traceability to the Applications ([#47](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/47)) ([87dfc6c](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/87dfc6c2bcce7f7d58fc641bd8d468a2e584c108))
+* NCS-82 add Swiss-system tournament module ([#55](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/55)) ([c5661de](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/c5661de4a0ebf4b33211f5a391840dcf744656b7))
+* true-microservices ([#40](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/40)) ([5909242](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/590924254e8a2754de661a57a03e43f89ceb6299))
+
+### Bug Fixes
+
+* **official-bots:** NCS-70-auto-register official bots with account service ([#59](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/59)) ([7117a93](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/7117a93376272094d0b1a6abf2121254ce396684))
+
+### Reverts
+
+* Revert "refactor: update metrics paths formatting in application.yml for clarity" ([3870566](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/38705663498d5f47c40dafe2f26198589ede8656))

modules/official-bots/build.gradle.kts

@@ -77,6 +77,8 @@ dependencies {
     implementation(project(":modules:api"))
     implementation(project(":modules:io"))
     implementation(project(":modules:rule"))
+    implementation(project(":modules:security"))
+    implementation("io.quarkus:quarkus-rest-client-jackson")
     implementation("com.microsoft.onnxruntime:onnxruntime:${versions["ONNXRUNTIME"]!!}")
     implementation("io.quarkus:quarkus-redis-client")
 

modules/official-bots/src/main/resources/application.yml

@@ -5,6 +5,9 @@ quarkus:
     name: nowchess-official-bots
   redis:
     hosts: redis://${REDIS_HOST:localhost}:${REDIS_PORT:6379}
+  rest-client:
+    account-service:
+      url: http://localhost:8083
   smallrye-jwt:
     enabled: true
   log:
@@ -15,6 +18,8 @@ nowchess:
     host: localhost
     port: 6379
     prefix: nowchess
+  internal:
+    secret: 123abc
 
 "%deployed":
   quarkus:
@@ -28,8 +33,13 @@ nowchess:
       exporter:
         otlp:
           endpoint: ${OTEL_EXPORTER_OTLP_ENDPOINT:http://localhost:4317}
+    rest-client:
+      account-service:
+        url: ${ACCOUNT_SERVICE_URL}
   nowchess:
     redis:
       host: ${REDIS_HOST:localhost}
       port: ${REDIS_PORT:6379}
       prefix: ${REDIS_PREFIX:nowchess}
+    internal:
+      secret: ${INTERNAL_SECRET}

modules/official-bots/src/main/scala/de/nowchess/bot/client/AccountServiceClient.scala

@@ -0,0 +1,20 @@
+package de.nowchess.bot.client
+
+import de.nowchess.security.{InternalClientHeadersFactory, InternalSecretClientFilter}
+import jakarta.ws.rs.*
+import jakarta.ws.rs.core.MediaType
+import org.eclipse.microprofile.rest.client.annotation.{RegisterClientHeaders, RegisterProvider}
+import org.eclipse.microprofile.rest.client.inject.RegisterRestClient
+
+case class SyncOfficialBotsRequest(bots: List[String])
+
+@Path("/api/account/official-bots")
+@RegisterRestClient(configKey = "account-service")
+@RegisterProvider(classOf[InternalSecretClientFilter])
+@RegisterClientHeaders(classOf[InternalClientHeadersFactory])
+trait AccountServiceClient:
+
+  @POST
+  @Path("/sync")
+  @Consumes(Array(MediaType.APPLICATION_JSON))
+  def syncBots(req: SyncOfficialBotsRequest): Unit

modules/official-bots/src/main/scala/de/nowchess/bot/service/OfficialBotService.scala

@@ -1,36 +1,66 @@
 package de.nowchess.bot.service
 
 import com.fasterxml.jackson.databind.ObjectMapper
+import de.nowchess.api.event.EventEnvelope
 import de.nowchess.api.move.{Move, MoveType, PromotionPiece}
 import de.nowchess.bot.BotController
 import de.nowchess.bot.BotDifficulty
+import de.nowchess.bot.client.{AccountServiceClient, SyncOfficialBotsRequest}
 import de.nowchess.bot.config.RedisConfig
 import de.nowchess.io.fen.FenParser
 import io.micrometer.core.instrument.MeterRegistry
 import io.quarkus.redis.datasource.RedisDataSource
+import io.quarkus.redis.datasource.stream.{StreamMessage, XAddArgs, XGroupCreateArgs, XReadGroupArgs}
 import io.quarkus.runtime.StartupEvent
 import jakarta.annotation.PostConstruct
 import jakarta.enterprise.context.ApplicationScoped
 import jakarta.enterprise.event.Observes
 import jakarta.inject.Inject
+import org.eclipse.microprofile.context.ManagedExecutor
+import org.eclipse.microprofile.rest.client.inject.RestClient
+import org.jboss.logging.Logger
 import scala.compiletime.uninitialized
+import scala.jdk.CollectionConverters.*
+import scala.util.{Failure, Success, Try}
+import java.time.Duration
+import java.util.UUID
+import io.quarkus.redis.datasource.pubsub.PubSubCommands
+import java.util.concurrent.{ConcurrentHashMap, TimeUnit}
 import java.util.function.Consumer
-import java.util.concurrent.TimeUnit
 
 @ApplicationScoped
 class OfficialBotService:
 
+  private val log = Logger.getLogger(classOf[OfficialBotService])
+
   // scalafix:off DisableSyntax.var
   @Inject var redis: RedisDataSource       = uninitialized
   @Inject var redisConfig: RedisConfig     = uninitialized
   @Inject var objectMapper: ObjectMapper   = uninitialized
   @Inject var botController: BotController = uninitialized
   @Inject var meterRegistry: MeterRegistry = uninitialized
+  @Inject var executor: ManagedExecutor    = uninitialized
+
+  @Inject
+  @RestClient
+  var accountServiceClient: AccountServiceClient = uninitialized
   // scalafix:on DisableSyntax.var
 
   private val terminalStatuses =
     Set("checkmate", "resign", "timeout", "stalemate", "insufficientMaterial", "draw")
 
+  private val groupName     = "official-bot"
+  private val gameOverGroup = "official-bots-game-over"
+  private val consumerId    = UUID.randomUUID().toString
+  private val maxRetries    = 3
+  private val maxStreamLen  = 1000L
+
+  private def eventStream(botName: String): String = s"${redisConfig.prefix}:bot:$botName:events:stream"
+  private def gameOverStream: String               = s"${redisConfig.prefix}:game-over"
+  private def dlqStream: String                    = s"${redisConfig.prefix}:dlq"
+
+  private val gameWatches = new ConcurrentHashMap[String, (String, PubSubCommands.RedisSubscriber)]()
+
   @PostConstruct
   def initializeMetrics(): Unit =
     BotController.listBots.foreach { bot =>
@@ -39,23 +69,99 @@ class OfficialBotService:
     }
 
   def onStart(@Observes event: StartupEvent): Unit =
-    BotController.listBots.foreach(subscribeToEventChannel)
+    val bots = BotController.listBots
+    try accountServiceClient.syncBots(SyncOfficialBotsRequest(bots))
+    catch case ex: Exception => log.errorf(ex, "Failed to auto-register official bots with account service")
+    bots.foreach(subscribeToEventChannel)
+    subscribeToGameOverStream()
 
   private def subscribeToEventChannel(botName: String): Unit =
-    val handler: Consumer[String] = msg => handleBotEvent(botName, msg)
-    redis.pubsub(classOf[String]).subscribe(s"${redisConfig.prefix}:bot:$botName:events", handler)
-    ()
+    createGroupIfAbsent(botName)
+    executor.submit(
+      new Runnable:
+        def run(): Unit = pollLoop(botName),
+    )
+    log.infof("Listening to bot event stream for %s (consumer=%s)", botName, consumerId)
 
-  private def handleBotEvent(botName: String, msg: String): Unit =
-    try
-      val node = objectMapper.readTree(msg)
-      if node.path("type").asText() == "gameStart" then
-        val gameId       = node.path("gameId").asText()
-        val playingAs    = node.path("playingAs").asText()
-        val difficulty   = node.path("difficulty").asInt(1400)
-        val botAccountId = node.path("botAccountId").asText()
-        watchGame(botName, gameId, playingAs, difficulty, botAccountId)
-    catch case _: Exception => ()
+  private def createGroupIfAbsent(botName: String): Unit =
+    Try(
+      redis
+        .stream(classOf[String])
+        .xgroupCreate(eventStream(botName), groupName, "0", new XGroupCreateArgs().mkstream()),
+    ) match
+      case Failure(ex) if Option(ex.getMessage).exists(_.contains("BUSYGROUP")) => ()
+      case Failure(ex) => log.warnf(ex, "Failed to create bot event consumer group for %s", botName)
+      case Success(_)  => ()
+
+  private def pollLoop(botName: String): Unit =
+    while true do
+      Try {
+        val messages = redis
+          .stream(classOf[String])
+          .xreadgroup(
+            groupName,
+            consumerId,
+            eventStream(botName),
+            ">",
+            new XReadGroupArgs().count(10).block(Duration.ofSeconds(2)),
+          )
+        Option(messages).foreach(_.forEach(msg => handleStreamMessage(botName, msg)))
+      } match
+        case Failure(ex) => log.warnf(ex, "Error in bot event poll loop for %s", botName)
+        case Success(_)  => ()
+
+  private def handleStreamMessage(botName: String, msg: StreamMessage[String, String, String]): Unit =
+    val json    = msg.payload().get("data")
+    val attempt = Option(msg.payload().get("attempt")).flatMap(_.toIntOption).getOrElse(0)
+    Try {
+      val envelope = objectMapper.readValue(json, classOf[EventEnvelope])
+      handleBotEvent(botName, envelope)
+    } match
+      case Success(_) => ack(botName, msg.id())
+      case Failure(ex) if attempt + 1 < maxRetries =>
+        log.warnf(ex, "Bot event handling failed for %s (attempt %d), retrying", botName, attempt)
+        retry(botName, json, attempt + 1)
+        ack(botName, msg.id())
+      case Failure(ex) =>
+        log.errorf(ex, "Bot event handling failed for %s after %d attempts, sending to DLQ", botName, maxRetries)
+        toDlq(json, ex, attempt)
+        ack(botName, msg.id())
+
+  private def handleBotEvent(botName: String, envelope: EventEnvelope): Unit =
+    val payload      = envelope.payload
+    val gameId       = payload.path("gameId").asText()
+    val playingAs    = payload.path("playingAs").asText()
+    val difficulty   = payload.path("difficulty").asInt(1400)
+    val botAccountId = payload.path("botAccountId").asText()
+    watchGame(botName, gameId, playingAs, difficulty, botAccountId)
+
+  private def ack(botName: String, id: String): Unit =
+    Try(redis.stream(classOf[String]).xack(eventStream(botName), groupName, id)) match
+      case Failure(ex) => log.warnf(ex, "Failed to ack bot event %s", id)
+      case Success(_)  => ()
+
+  private def retry(botName: String, json: String, attempt: Int): Unit =
+    xadd(eventStream(botName), Map("data" -> json, "attempt" -> attempt.toString))
+
+  private def toDlq(json: String, error: Throwable, attempt: Int): Unit =
+    xadd(
+      dlqStream,
+      Map(
+        "data"      -> json,
+        "eventType" -> "BotGameStart",
+        "error"     -> Option(error.getMessage).getOrElse(error.getClass.getName),
+        "attempt"   -> (attempt + 1).toString,
+      ),
+    )
+
+  private def xadd(key: String, fields: Map[String, String]): Unit =
+    Try(
+      redis
+        .stream(classOf[String])
+        .xadd(key, new XAddArgs().maxlen(maxStreamLen).nearlyExactTrimming(), fields.asJava),
+    ) match
+      case Failure(ex) => log.errorf(ex, "Failed to publish to stream %s", key)
+      case Success(_)  => ()
 
   private def watchGame(
       botName: String,
@@ -65,9 +171,80 @@ class OfficialBotService:
       botAccountId: String,
   ): Unit =
     val handler: Consumer[String] = msg => handleGameEvent(botName, gameId, playingAs, difficulty, botAccountId, msg)
-    redis.pubsub(classOf[String]).subscribe(s"${redisConfig.prefix}:game:$gameId:s2c", handler)
+    val subscriber = redis.pubsub(classOf[String]).subscribe(s"${redisConfig.prefix}:game:$gameId:s2c", handler)
+    gameWatches.put(gameId, (botName, subscriber))
     ()
 
+  private def subscribeToGameOverStream(): Unit =
+    Try(
+      redis
+        .stream(classOf[String])
+        .xgroupCreate(gameOverStream, gameOverGroup, "$", new XGroupCreateArgs().mkstream()),
+    ) match
+      case Failure(ex) if Option(ex.getMessage).exists(_.contains("BUSYGROUP")) => ()
+      case Failure(ex) => log.warnf(ex, "Failed to create game-over consumer group")
+      case Success(_)  => ()
+    executor.submit(
+      new Runnable:
+        def run(): Unit = gameOverPollLoop(),
+    )
+    log.infof("Listening to game-over stream (consumer=%s)", consumerId)
+
+  private def gameOverPollLoop(): Unit =
+    while true do
+      Try {
+        val messages = redis
+          .stream(classOf[String])
+          .xreadgroup(
+            gameOverGroup,
+            consumerId,
+            gameOverStream,
+            ">",
+            new XReadGroupArgs().count(10).block(Duration.ofSeconds(2)),
+          )
+        Option(messages).foreach(_.forEach(msg => handleGameOverMessage(msg)))
+      } match
+        case Failure(ex) => log.warnf(ex, "Error in game-over poll loop")
+        case Success(_)  => ()
+
+  private def handleGameOverMessage(msg: StreamMessage[String, String, String]): Unit =
+    val json    = msg.payload().get("data")
+    val attempt = Option(msg.payload().get("attempt")).flatMap(_.toIntOption).getOrElse(0)
+    Try {
+      val node   = objectMapper.readTree(json)
+      val gameId = node.path("payload").path("gameId").asText()
+      if gameId.nonEmpty then
+        Option(gameWatches.remove(gameId)).foreach { (botName, subscriber) =>
+          val topic = s"${redisConfig.prefix}:game:$gameId:s2c"
+          Try(subscriber.unsubscribe(topic)) match
+            case Failure(ex) => log.warnf(ex, "Failed to unsubscribe from game %s", gameId)
+            case Success(_)  => log.infof("Bot %s cleaned up game %s after GameOver", botName, gameId)
+        }
+    } match
+      case Success(_) =>
+        ackGameOver(msg.id())
+      case Failure(ex) if attempt + 1 < maxRetries =>
+        log.warnf(ex, "GameOver handling failed (attempt %d), retrying", attempt)
+        xadd(gameOverStream, Map("data" -> json, "attempt" -> (attempt + 1).toString))
+        ackGameOver(msg.id())
+      case Failure(ex) =>
+        log.errorf(ex, "GameOver handling failed after %d attempts, sending to DLQ", maxRetries)
+        xadd(
+          dlqStream,
+          Map(
+            "data"      -> json,
+            "eventType" -> "GameOver",
+            "error"     -> Option(ex.getMessage).getOrElse(ex.getClass.getName),
+            "attempt"   -> attempt.toString,
+          ),
+        )
+        ackGameOver(msg.id())
+
+  private def ackGameOver(id: String): Unit =
+    Try(redis.stream(classOf[String]).xack(gameOverStream, gameOverGroup, id)) match
+      case Failure(ex) => log.warnf(ex, "Failed to ack game-over message %s", id)
+      case Success(_)  => ()
+
   private def handleGameEvent(
       botName: String,
       gameId: String,

modules/official-bots/src/main/scala/de/nowchess/bot/service/TournamentBotConfig.scala

@@ -0,0 +1,35 @@
+package de.nowchess.bot.service
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import scala.util.Try
+
+final case class TournamentBotConfig(
+    serverUrl: String,
+    tournamentId: String,
+    token: String,
+    botId: String,
+    difficulty: String,
+)
+
+object TournamentBotConfig:
+
+  private val mapper = new ObjectMapper()
+
+  def fromEnv(env: Map[String, String]): Option[TournamentBotConfig] =
+    for
+      tournamentId <- env.get("TOURNAMENT_ID").filter(_.nonEmpty)
+      token        <- env.get("TOURNAMENT_BOT_TOKEN").filter(_.nonEmpty)
+      botId        <- jwtSubject(token)
+      serverUrl  = env.getOrElse("TOURNAMENT_SERVER_URL", "http://localhost:8089")
+      difficulty = env.getOrElse("TOURNAMENT_BOT_DIFFICULTY", "medium")
+    yield TournamentBotConfig(serverUrl, tournamentId, token, botId, difficulty)
+
+  def jwtSubject(token: String): Option[String] =
+    Try {
+      val parts = token.split("\\.")
+      if parts.length >= 2 then
+        val payload = new String(java.util.Base64.getUrlDecoder.decode(parts(1)))
+        val sub     = mapper.readTree(payload).path("sub").asText()
+        Option(sub).filter(_.nonEmpty)
+      else None
+    }.toOption.flatten

modules/official-bots/src/main/scala/de/nowchess/bot/service/TournamentBotGamePlayer.scala

@@ -0,0 +1,226 @@
+package de.nowchess.bot.service
+
+import com.fasterxml.jackson.databind.{JsonNode, ObjectMapper}
+import de.nowchess.api.move.{Move, MoveType, PromotionPiece}
+import de.nowchess.bot.{Bot, BotController}
+import de.nowchess.io.fen.FenParser
+import io.quarkus.runtime.Startup
+import jakarta.annotation.{PostConstruct, PreDestroy}
+import jakarta.enterprise.context.ApplicationScoped
+import jakarta.inject.Inject
+import jakarta.ws.rs.client.{Client, ClientBuilder, Entity}
+import jakarta.ws.rs.core.MediaType
+import org.jboss.logging.Logger
+import scala.compiletime.uninitialized
+import scala.jdk.CollectionConverters.*
+import scala.util.{Failure, Success, Try}
+import java.io.{BufferedReader, InputStream, InputStreamReader}
+import java.util.concurrent.{ConcurrentHashMap, ExecutorService, Executors}
+
+@Startup
+@ApplicationScoped
+class TournamentBotGamePlayer:
+
+  private val log = Logger.getLogger(classOf[TournamentBotGamePlayer])
+
+  // scalafix:off DisableSyntax.var
+  @Inject var objectMapper: ObjectMapper   = uninitialized
+  @Inject var botController: BotController = uninitialized
+  // scalafix:on DisableSyntax.var
+
+  private val client: Client           = ClientBuilder.newClient()
+  private val workers: ExecutorService = Executors.newCachedThreadPool()
+  private val activeGames              = ConcurrentHashMap.newKeySet[String]()
+
+  private val config = TournamentBotConfig.fromEnv(System.getenv().asScala.toMap)
+
+  // scalafix:off DisableSyntax.var
+  @volatile private var running = true
+  // scalafix:on DisableSyntax.var
+
+  @PostConstruct
+  def initialize(): Unit =
+    config match
+      case None =>
+        log.info("Tournament bot disabled — set TOURNAMENT_ID and TOURNAMENT_BOT_TOKEN to enable")
+      case Some(cfg) =>
+        log.infof("Tournament bot enabled — server=%s tournament=%s bot=%s", cfg.serverUrl, cfg.tournamentId, cfg.botId)
+        val thread = new Thread(() => connect(cfg), s"TournamentBot-${cfg.tournamentId}")
+        thread.setDaemon(true)
+        thread.start()
+
+  @PreDestroy
+  def cleanup(): Unit =
+    running = false
+    workers.shutdownNow()
+    Try(client.close())
+    log.info("Tournament bot stopped")
+
+  private def connect(cfg: TournamentBotConfig): Unit =
+    if join(cfg) then
+      while running do
+        Try(streamEvents(cfg)) match
+          case Failure(ex) => log.warnf(ex, "Tournament event stream dropped — reconnecting"); sleep(5000)
+          case Success(_)  => sleep(2000)
+
+  private def join(cfg: TournamentBotConfig): Boolean =
+    Try {
+      val response = authed(cfg, target(cfg).path("join"))
+        .post(Entity.entity("", MediaType.APPLICATION_JSON))
+      val ok = response.getStatus == 200
+      if ok then log.infof("Joined tournament %s", cfg.tournamentId)
+      else log.errorf("Failed to join tournament %s — status %d", cfg.tournamentId, response.getStatus)
+      response.close()
+      ok
+    }.getOrElse { log.error("Join request failed"); false }
+
+  private def streamEvents(cfg: TournamentBotConfig): Unit =
+    val response = authed(cfg, target(cfg).path("stream"))
+      .header("Accept", "application/x-ndjson")
+      .get()
+    if response.getStatus != 200 then
+      log.warnf("Tournament stream returned status %d", response.getStatus)
+      response.close()
+      sleep(5000)
+    else
+      log.infof("Listening to tournament %s event stream", cfg.tournamentId)
+      forEachLine(response.readEntity(classOf[InputStream])): line =>
+        parse(line).foreach: node =>
+          if node.path("type").asText() == "gameStart" then onGameStart(cfg, node.path("gameId").asText())
+
+  private def onGameStart(cfg: TournamentBotConfig, gameId: String): Unit =
+    if gameId.nonEmpty && activeGames.add(gameId) then
+      workers.submit(new Runnable { def run(): Unit = playGame(cfg, gameId) })
+      ()
+
+  private def playGame(cfg: TournamentBotConfig, gameId: String): Unit =
+    Try {
+      colorFor(cfg, gameId) match
+        case None =>
+          log.debugf("Game %s is not ours — ignoring", gameId)
+          activeGames.remove(gameId)
+        case Some(color) =>
+          log.infof("Playing game %s as %s", gameId, color)
+          val stream = openGameStream(cfg, gameId)
+          maybeMoveFromCurrentState(cfg, gameId, color)
+          stream.foreach(consumeGameStream(cfg, gameId, color, _))
+          activeGames.remove(gameId)
+    } match
+      case Failure(ex) => log.errorf(ex, "Game %s crashed", gameId); activeGames.remove(gameId)
+      case Success(_)  => ()
+
+  private def colorFor(cfg: TournamentBotConfig, gameId: String): Option[String] =
+    fetchGame(cfg, gameId).flatMap: game =>
+      val white = game.path("white").path("id").asText()
+      val black = game.path("black").path("id").asText()
+      if white == cfg.botId then Some("white")
+      else if black == cfg.botId then Some("black")
+      else None
+
+  private def maybeMoveFromCurrentState(cfg: TournamentBotConfig, gameId: String, color: String): Unit =
+    fetchGame(cfg, gameId).foreach: game =>
+      maybeMove(cfg, gameId, color, game.path("turn").asText(), game.path("status").asText(), game.path("fen").asText())
+
+  private def consumeGameStream(cfg: TournamentBotConfig, gameId: String, color: String, stream: InputStream): Unit =
+    val reader = new BufferedReader(new InputStreamReader(stream))
+    // scalafix:off DisableSyntax.var
+    var done = false
+    // scalafix:on DisableSyntax.var
+    Iterator
+      .continually(reader.readLine())
+      .map(Option(_))
+      .takeWhile(opt => opt.isDefined && running && !done)
+      .flatten
+      .foreach { line =>
+        parse(line).foreach: node =>
+          node.path("type").asText() match
+            case "move" =>
+              maybeMove(cfg, gameId, color, node.path("turn").asText(), "ongoing", node.path("fen").asText())
+            case "gameEnd" => log.infof("Game %s ended — status=%s", gameId, node.path("status").asText()); done = true
+            case _         => ()
+      }
+
+  private def maybeMove(
+      cfg: TournamentBotConfig,
+      gameId: String,
+      color: String,
+      turn: String,
+      status: String,
+      fen: String,
+  ): Unit =
+    if turn == color && status == "ongoing" && fen.nonEmpty then
+      computeUci(cfg, fen) match
+        case None      => log.warnf("No move found for game %s (fen=%s)", gameId, fen)
+        case Some(uci) => submitMove(cfg, gameId, uci)
+
+  private def computeUci(cfg: TournamentBotConfig, fen: String): Option[String] =
+    FenParser.parseFen(fen) match
+      case Left(err)      => log.warnf("FEN parse failed: %s (%s)", fen, err.toString); None
+      case Right(context) => engine(cfg).apply(context).map(toUci)
+
+  private def submitMove(cfg: TournamentBotConfig, gameId: String, uci: String): Unit =
+    Try {
+      val response = authed(cfg, target(cfg).path("game").path(gameId).path("move").path(uci))
+        .post(Entity.entity("", MediaType.APPLICATION_JSON))
+      if response.getStatus == 200 then log.infof("Played %s in game %s", uci, gameId)
+      else log.warnf("Move %s rejected in game %s — status %d", uci, gameId, response.getStatus)
+      response.close()
+    } match
+      case Failure(ex) => log.errorf(ex, "Error submitting move %s in game %s", uci, gameId)
+      case Success(_)  => ()
+
+  private def fetchGame(cfg: TournamentBotConfig, gameId: String): Option[JsonNode] =
+    Try {
+      val response = target(cfg).path("game").path(gameId).request(MediaType.APPLICATION_JSON).get()
+      val node     = if response.getStatus == 200 then Some(response.readEntity(classOf[JsonNode])) else None
+      response.close()
+      node
+    }.getOrElse(None)
+
+  private def openGameStream(cfg: TournamentBotConfig, gameId: String): Option[InputStream] =
+    Try {
+      val response = authed(cfg, target(cfg).path("game").path(gameId).path("stream"))
+        .header("Accept", "application/x-ndjson")
+        .get()
+      if response.getStatus == 200 then Some(response.readEntity(classOf[InputStream]))
+      else { log.warnf("Game stream %s returned status %d", gameId, response.getStatus); response.close(); None }
+    }.getOrElse(None)
+
+  private def engine(cfg: TournamentBotConfig): Bot =
+    botController.getBot(cfg.difficulty).orElse(botController.getBot("medium")).get
+
+  private def target(cfg: TournamentBotConfig) =
+    client.target(cfg.serverUrl).path("api").path("tournament").path(cfg.tournamentId)
+
+  private def authed(cfg: TournamentBotConfig, t: jakarta.ws.rs.client.WebTarget) =
+    t.request(MediaType.APPLICATION_JSON).header("Authorization", s"Bearer ${cfg.token}")
+
+  private def parse(line: String): Option[JsonNode] =
+    val trimmed = line.trim
+    if trimmed.isEmpty then None else Try(objectMapper.readTree(trimmed)).toOption
+
+  private def forEachLine(stream: InputStream)(handle: String => Unit): Unit =
+    val reader = new BufferedReader(new InputStreamReader(stream))
+    Iterator
+      .continually(reader.readLine())
+      .map(Option(_))
+      .takeWhile(opt => opt.isDefined && running)
+      .flatten
+      .foreach { line =>
+        Try(handle(line)).failed.foreach(ex => log.warnf(ex, "Error handling stream line"))
+      }
+
+  private def toUci(move: Move): String =
+    val base = s"${move.from}${move.to}"
+    move.moveType match
+      case MoveType.Promotion(piece) => base + promotionChar(piece)
+      case _                         => base
+
+  private def promotionChar(piece: PromotionPiece): String =
+    piece match
+      case PromotionPiece.Knight => "n"
+      case PromotionPiece.Bishop => "b"
+      case PromotionPiece.Rook   => "r"
+      case PromotionPiece.Queen  => "q"
+
+  private def sleep(ms: Long): Unit = Try(Thread.sleep(ms))

modules/official-bots/versions.env

@@ -1,3 +1,3 @@
 MAJOR=0
-MINOR=13
+MINOR=16
 PATCH=0

modules/tournament/build.gradle.kts

@@ -0,0 +1,120 @@
+plugins {
+    id("scala")
+    id("org.scoverage") version "8.1"
+    id("io.quarkus")
+}
+
+group = "de.nowchess"
+version = "1.0-SNAPSHOT"
+
+@Suppress("UNCHECKED_CAST")
+val versions = rootProject.extra["VERSIONS"] as Map<String, String>
+
+repositories {
+    mavenCentral()
+}
+
+scala {
+    scalaVersion = versions["SCALA3"]!!
+}
+
+scoverage {
+    scoverageVersion.set(versions["SCOVERAGE"]!!)
+}
+
+tasks.withType<ScalaCompile> {
+    scalaCompileOptions.additionalParameters = listOf("-encoding", "UTF-8")
+}
+
+val quarkusPlatformGroupId: String by project
+val quarkusPlatformArtifactId: String by project
+val quarkusPlatformVersion: String by project
+
+dependencies {
+    implementation(project(":modules:api"))
+    implementation(project(":modules:security"))
+
+    runtimeOnly("io.quarkus:quarkus-jdbc-h2")
+
+    compileOnly("org.scala-lang:scala3-compiler_3") {
+        version {
+            strictly(versions["SCALA3"]!!)
+        }
+    }
+    implementation("org.scala-lang:scala3-library_3") {
+        version {
+            strictly(versions["SCALA3"]!!)
+        }
+    }
+
+    implementation(platform("${quarkusPlatformGroupId}:${quarkusPlatformArtifactId}:${quarkusPlatformVersion}"))
+    implementation("io.quarkus:quarkus-rest")
+    implementation("io.quarkus:quarkus-rest-jackson")
+    implementation("io.quarkus:quarkus-rest-client-jackson")
+    implementation("io.quarkus:quarkus-config-yaml")
+    implementation("io.quarkus:quarkus-arc")
+    implementation("io.quarkus:quarkus-hibernate-orm-panache")
+    implementation("io.quarkus:quarkus-jdbc-postgresql")
+    implementation("io.quarkus:quarkus-smallrye-jwt")
+    implementation("io.quarkus:quarkus-elytron-security-common")
+    implementation("io.quarkus:quarkus-smallrye-health")
+    implementation("io.quarkus:quarkus-logging-json")
+    implementation("io.quarkus:quarkus-micrometer")
+    implementation("io.quarkus:quarkus-micrometer-registry-prometheus")
+    implementation("io.quarkus:quarkus-opentelemetry")
+    implementation("io.quarkus:quarkus-smallrye-openapi")
+    implementation("com.fasterxml.jackson.module:jackson-module-scala_3:${versions["JACKSON_SCALA"]!!}")
+    implementation("io.quarkus:quarkus-redis-client")
+
+    testImplementation(platform("org.junit:junit-bom:5.13.4"))
+    testImplementation("org.junit.jupiter:junit-jupiter")
+    testImplementation("io.quarkus:quarkus-smallrye-jwt-build")
+    testImplementation("org.scalatest:scalatest_3:${versions["SCALATEST"]!!}")
+    testImplementation("co.helmethair:scalatest-junit-runner:${versions["SCALATEST_JUNIT"]!!}")
+    testImplementation("io.quarkus:quarkus-junit5")
+    testImplementation("io.quarkus:quarkus-junit5-mockito")
+    testImplementation("io.rest-assured:rest-assured")
+    testImplementation("io.quarkus:quarkus-jdbc-h2")
+    testImplementation("io.quarkus:quarkus-test-security")
+
+    testRuntimeOnly("org.junit.platform:junit-platform-launcher")
+}
+
+configurations.matching { !it.name.startsWith("scoverage") }.configureEach {
+    resolutionStrategy.force("org.scala-lang:scala-library:${versions["SCALA_LIBRARY"]!!}")
+}
+configurations.scoverage {
+    resolutionStrategy.eachDependency {
+        if (requested.group == "org.scoverage" && requested.name.startsWith("scalac-scoverage-plugin_")) {
+            useTarget("${requested.group}:scalac-scoverage-plugin_2.13.16:2.3.0")
+        }
+    }
+}
+
+tasks.withType<JavaCompile> {
+    options.encoding = "UTF-8"
+    options.compilerArgs.add("-parameters")
+}
+
+tasks.withType<Jar>().configureEach {
+    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+}
+
+tasks.test {
+    useJUnitPlatform {
+        includeEngines("scalatest", "junit-jupiter")
+        testLogging {
+            events("passed", "skipped", "failed")
+            showStandardStreams = true
+            exceptionFormat = org.gradle.api.tasks.testing.logging.TestExceptionFormat.FULL
+        }
+    }
+    finalizedBy(tasks.reportScoverage)
+}
+tasks.reportScoverage {
+    dependsOn(tasks.test)
+}
+
+tasks.jar {
+    duplicatesStrategy = DuplicatesStrategy.INCLUDE
+}

modules/tournament/src/main/docker/Dockerfile.jvm

@@ -0,0 +1,36 @@
+####
+# This Dockerfile is used in order to build a container that runs the Quarkus application in JVM mode
+#
+# Before building the container image run:
+#
+# ./gradlew build
+#
+# Then, build the image with:
+#
+# docker build -f src/main/docker/Dockerfile.jvm -t quarkus/tournament-jvm .
+#
+# Then run the container using:
+#
+# docker run -i --rm -p 8080:8080 quarkus/tournament-jvm
+#
+# This image uses the `run-java.sh` script to run the application.
+# You can find more information about the UBI base runtime images and their configuration here:
+# https://rh-openjdk.github.io/redhat-openjdk-containers/
+###
+FROM registry.access.redhat.com/ubi9/openjdk-21-runtime:1.24
+
+ENV LANGUAGE='en_US:en'
+
+
+# We make four distinct layers so if there are application changes the library layers can be re-used
+COPY --chown=185 build/quarkus-app/lib/ /deployments/lib/
+COPY --chown=185 build/quarkus-app/*.jar /deployments/
+COPY --chown=185 build/quarkus-app/app/ /deployments/app/
+COPY --chown=185 build/quarkus-app/quarkus/ /deployments/quarkus/
+
+EXPOSE 8080
+USER 185
+ENV JAVA_OPTS_APPEND="-Dquarkus.http.host=0.0.0.0 -Djava.util.logging.manager=org.jboss.logmanager.LogManager"
+ENV JAVA_APP_JAR="/deployments/quarkus-run.jar"
+
+ENTRYPOINT [ "/opt/jboss/container/java/run/run-java.sh" ]

modules/tournament/src/main/docker/Dockerfile.legacy-jar

@@ -0,0 +1,33 @@
+####
+# This Dockerfile is used in order to build a container that runs the Quarkus application in JVM mode
+#
+# Before building the container image run:
+#
+# ./gradlew build -Dquarkus.package.jar.type=legacy-jar
+#
+# Then, build the image with:
+#
+# docker build -f src/main/docker/Dockerfile.legacy-jar -t quarkus/tournament-legacy-jar .
+#
+# Then run the container using:
+#
+# docker run -i --rm -p 8080:8080 quarkus/tournament-legacy-jar
+#
+# This image uses the `run-java.sh` script to run the application.
+# You can find more information about the UBI base runtime images and their configuration here:
+# https://rh-openjdk.github.io/redhat-openjdk-containers/
+###
+FROM registry.access.redhat.com/ubi9/openjdk-21-runtime:1.24
+
+ENV LANGUAGE='en_US:en'
+
+
+COPY build/lib/* /deployments/lib/
+COPY build/*-runner.jar /deployments/quarkus-run.jar
+
+EXPOSE 8080
+USER 185
+ENV JAVA_OPTS_APPEND="-Dquarkus.http.host=0.0.0.0 -Djava.util.logging.manager=org.jboss.logmanager.LogManager"
+ENV JAVA_APP_JAR="/deployments/quarkus-run.jar"
+
+ENTRYPOINT [ "/opt/jboss/container/java/run/run-java.sh" ]

modules/tournament/src/main/docker/Dockerfile.native

@@ -0,0 +1,29 @@
+####
+# This Dockerfile is used in order to build a container that runs the Quarkus application in native (no JVM) mode.
+#
+# Before building the container image run:
+#
+# ./gradlew :modules:tournament:build -Dquarkus.native.enabled=true
+#
+# Then, build the image with:
+#
+# docker build -f modules/tournament/src/main/docker/Dockerfile.native -t quarkus/tournament .
+#
+# Then run the container using:
+#
+# docker run -i --rm -p 8080:8080 quarkus/tournament
+#
+# The `registry.access.redhat.com/ubi9/ubi-minimal:9.7` base image is based on UBI 9.
+# To use UBI 8, switch to `quay.io/ubi8/ubi-minimal:8.10`.
+###
+FROM registry.access.redhat.com/ubi9/ubi-minimal:9.7
+WORKDIR /work/
+RUN chown 1001 /work \
+    && chmod "g+rwX" /work \
+    && chown 1001:root /work
+COPY --chown=1001:root --chmod=0755 modules/tournament/build/*-runner /work/application
+
+EXPOSE 8080
+USER 1001
+
+ENTRYPOINT ["./application", "-Dquarkus.http.host=0.0.0.0"]

modules/tournament/src/main/docker/Dockerfile.native-micro

@@ -0,0 +1,32 @@
+####
+# This Dockerfile is used in order to build a container that runs the Quarkus application in native (no JVM) mode.
+# It uses a micro base image, tuned for Quarkus native executables.
+# It reduces the size of the resulting container image.
+# Check https://quarkus.io/guides/quarkus-runtime-base-image for further information about this image.
+#
+# Before building the container image run:
+#
+# ./gradlew build -Dquarkus.native.enabled=true
+#
+# Then, build the image with:
+#
+# docker build -f src/main/docker/Dockerfile.native-micro -t quarkus/tournament .
+#
+# Then run the container using:
+#
+# docker run -i --rm -p 8080:8080 quarkus/tournament
+#
+# The `quay.io/quarkus/ubi9-quarkus-micro-image:2.0` base image is based on UBI 9.
+# To use UBI 8, switch to `quay.io/quarkus/quarkus-micro-image:2.0`.
+###
+FROM quay.io/quarkus/ubi9-quarkus-micro-image:2.0
+WORKDIR /work/
+RUN chown 1001 /work \
+    && chmod "g+rwX" /work \
+    && chown 1001:root /work
+COPY --chown=1001:root --chmod=0755 build/*-runner /work/application
+
+EXPOSE 8080
+USER 1001
+
+ENTRYPOINT ["./application", "-Dquarkus.http.host=0.0.0.0"]

modules/tournament/src/main/resources/application.yml

@@ -0,0 +1,59 @@
+quarkus:
+  http:
+    port: 8088
+  application:
+    name: nowchess-tournament
+  redis:
+    hosts: redis://${REDIS_HOST:localhost}:${REDIS_PORT:6379}
+  rest-client:
+    core-service:
+      url: http://localhost:8080
+  datasource:
+    db-kind: h2
+    username: sa
+    password: ""
+    jdbc:
+      url: jdbc:h2:mem:nowchess-tournament;DB_CLOSE_DELAY=-1
+  hibernate-orm:
+    schema-management:
+      strategy: drop-and-create
+  smallrye-jwt:
+    enabled: true
+
+nowchess:
+  redis:
+    host: ${REDIS_HOST:localhost}
+    port: ${REDIS_PORT:6379}
+    prefix: ${REDIS_PREFIX:nowchess}
+  internal:
+    secret: ${INTERNAL_SECRET:123abc}
+
+mp:
+  jwt:
+    verify:
+      publickey:
+        location: keys/public.pem
+      issuer: nowchess
+
+"%deployed":
+  quarkus:
+    datasource:
+      db-kind: postgresql
+      username: ${DB_USER:nowchess}
+      password: ${DB_PASSWORD:nowchess}
+      jdbc:
+        url: ${DB_URL:jdbc:postgresql://localhost:5432/nowchess}
+    hibernate-orm:
+      schema-management:
+        strategy: update
+
+"%test":
+  quarkus:
+    datasource:
+      jdbc:
+        url: jdbc:h2:mem:nowchess-tournament;DB_CLOSE_DELAY=-1
+    hibernate-orm:
+      schema-management:
+        strategy: drop-and-create
+    arc:
+      exclude-types: de.nowchess.tournament.redis.GameResultStreamListener

modules/tournament/src/main/resources/keys/public.pem

@@ -0,0 +1,9 @@
+-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxDsnsCAl0vQx7Vu9CLDZ
+g0SG05NgUzu9T+3DTEaHGq60T2uriO8BenwyvsF3BnDqTbKf4voohZ1DNfzdbT1J
+Fj8B62FrDmxcO+sp1/b5HUCJP6y2uSRCmzOHe5k7Pk1IEi72FgBpKXSRkFibRlVf
+634g7mgsPZAQ9PJEsv4Qvm05T9L6+Gmq6N3bMVLKRXs4RhDhaFbYH9GtUg1eI0yH
+YjGyRfqzW/nqVMstOLHt8CuPouq4p7eMzeDH3YHkxPm4GG5foCXMOd2DZrW0SCcr
+7dhFeNVWzQ2m53eOhBzNQX+v3pgjVStsePhBRt2LyGfwkNzmqDgqWsMzSHRMY+cn
+WQIDAQAB
+-----END PUBLIC KEY-----

modules/tournament/src/main/scala/de/nowchess/tournament/client/CoreGameClient.scala

@@ -1,4 +1,4 @@
-package de.nowchess.account.client
+package de.nowchess.tournament.client
 
 import de.nowchess.security.{InternalClientHeadersFactory, InternalSecretClientFilter}
 import jakarta.ws.rs.*

modules/tournament/src/main/scala/de/nowchess/tournament/config/JacksonConfig.scala

@@ -0,0 +1,11 @@
+package de.nowchess.tournament.config
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import com.fasterxml.jackson.module.scala.DefaultScalaModule
+import io.quarkus.jackson.ObjectMapperCustomizer
+import jakarta.inject.Singleton
+
+@Singleton
+class JacksonConfig extends ObjectMapperCustomizer:
+  def customize(objectMapper: ObjectMapper): Unit =
+    objectMapper.registerModule(DefaultScalaModule)

modules/tournament/src/main/scala/de/nowchess/tournament/config/RedisConfig.scala

@@ -0,0 +1,12 @@
+package de.nowchess.tournament.config
+
+import jakarta.enterprise.context.ApplicationScoped
+import org.eclipse.microprofile.config.inject.ConfigProperty
+import scala.compiletime.uninitialized
+
+@ApplicationScoped
+class RedisConfig:
+  // scalafix:off DisableSyntax.var
+  @ConfigProperty(name = "nowchess.redis.prefix", defaultValue = "nowchess")
+  var prefix: String = uninitialized
+  // scalafix:on DisableSyntax.var

modules/tournament/src/main/scala/de/nowchess/tournament/domain/Tournament.scala

@@ -0,0 +1,33 @@
+package de.nowchess.tournament.domain
+
+import jakarta.persistence.*
+import scala.compiletime.uninitialized
+import java.time.Instant
+
+@Entity
+@Table(name = "tournaments")
+class Tournament:
+  // scalafix:off DisableSyntax.var
+  @Id
+  var id: String = uninitialized
+
+  @Column(nullable = false)
+  var fullName: String = uninitialized
+
+  var nbRounds: Int       = 0
+  var clockLimit: Int     = 0
+  var clockIncrement: Int = 0
+  var rated: Boolean      = true
+
+  @Column(nullable = false)
+  var status: String = "created"
+
+  var currentRound: Int = 0
+
+  @Column(nullable = false)
+  var createdBy: String = uninitialized
+
+  var startsAt: Instant  = uninitialized
+  var winnerId: String   = uninitialized
+  var winnerName: String = uninitialized
+  // scalafix:on

modules/tournament/src/main/scala/de/nowchess/tournament/domain/TournamentPairing.scala

@@ -0,0 +1,31 @@
+package de.nowchess.tournament.domain
+
+import jakarta.persistence.*
+import scala.compiletime.uninitialized
+import java.util.UUID
+
+@Entity
+@Table(name = "tournament_pairings")
+class TournamentPairing:
+  // scalafix:off DisableSyntax.var
+  @Id
+  @GeneratedValue(strategy = GenerationType.UUID)
+  var id: UUID = uninitialized
+
+  @Column(nullable = false)
+  var tournamentId: String = uninitialized
+
+  var round: Int        = 0
+  var whiteId: String   = uninitialized
+  var whiteName: String = uninitialized
+
+  @Column(nullable = false)
+  var blackId: String = uninitialized
+
+  @Column(nullable = false)
+  var blackName: String = uninitialized
+
+  var gameId: String   = uninitialized
+  var winner: String   = uninitialized
+  var moveList: String = uninitialized
+  // scalafix:on

modules/tournament/src/main/scala/de/nowchess/tournament/domain/TournamentParticipant.scala

@@ -0,0 +1,31 @@
+package de.nowchess.tournament.domain
+
+import jakarta.persistence.*
+import scala.compiletime.uninitialized
+import java.util.UUID
+
+@Entity
+@Table(name = "tournament_participants")
+class TournamentParticipant:
+  // scalafix:off DisableSyntax.var
+  @Id
+  @GeneratedValue(strategy = GenerationType.UUID)
+  var id: UUID = uninitialized
+
+  @Column(nullable = false)
+  var tournamentId: String = uninitialized
+
+  @Column(nullable = false)
+  var botId: String = uninitialized
+
+  @Column(nullable = false)
+  var botName: String = uninitialized
+
+  var points: Double   = 0.0
+  var tieBreak: Double = 0.0
+  var nbGames: Int     = 0
+  var wins: Int        = 0
+  var draws: Int       = 0
+  var losses: Int      = 0
+  var byeCount: Int    = 0
+  // scalafix:on

modules/tournament/src/main/scala/de/nowchess/tournament/dto/Dtos.scala

@@ -0,0 +1,74 @@
+package de.nowchess.tournament.dto
+
+case class BotRef(id: String, name: String)
+
+case class Clock(limit: Int, increment: Int)
+
+case class Variant(key: String, name: String)
+
+case class CreateTournamentForm(
+    name: String,
+    nbRounds: Int,
+    clockLimit: Int,
+    clockIncrement: Int,
+    rated: Boolean = true,
+)
+
+case class ResultDto(
+    rank: Int,
+    points: Double,
+    tieBreak: Double,
+    bot: BotRef,
+    nbGames: Int,
+    wins: Int,
+    draws: Int,
+    losses: Int,
+)
+
+case class Standing(page: Int, players: List[ResultDto])
+
+case class TournamentDto(
+    id: String,
+    fullName: String,
+    clock: Clock,
+    variant: Variant,
+    rated: Boolean,
+    nbPlayers: Int,
+    nbRounds: Int,
+    createdBy: String,
+    startsAt: Option[String],
+    status: String,
+    round: Int,
+    standing: Standing,
+    winner: Option[BotRef],
+)
+
+case class TournamentListDto(
+    created: List[TournamentDto],
+    started: List[TournamentDto],
+    finished: List[TournamentDto],
+)
+
+case class PairingDto(
+    id: String,
+    round: Int,
+    white: Option[BotRef],
+    black: BotRef,
+    gameId: Option[String],
+    winner: Option[String],
+)
+
+case class GameExportDto(
+    id: String,
+    round: Int,
+    white: BotRef,
+    black: BotRef,
+    winner: Option[String],
+    moves: String,
+)
+
+case class RoundPairingsDto(round: Int, pairings: List[PairingDto])
+
+case class ErrorDto(error: String)
+
+case class OkDto(ok: Boolean = true)

modules/tournament/src/main/scala/de/nowchess/tournament/error/TournamentError.scala

@@ -0,0 +1,10 @@
+package de.nowchess.tournament.error
+
+enum TournamentError(val message: String):
+  case NotFound(id: String)          extends TournamentError(s"Tournament $id not found")
+  case NotDirector                   extends TournamentError("Not the tournament director")
+  case WrongStatus(expected: String) extends TournamentError(s"Tournament must be in $expected status")
+  case AlreadyJoined                 extends TournamentError("Already joined this tournament")
+  case NotJoined                     extends TournamentError("Not joined this tournament")
+  case NotEnoughParticipants         extends TournamentError("Need at least 2 participants to start")
+  case NotABot                       extends TournamentError("Only bot accounts can join tournaments")

modules/tournament/src/main/scala/de/nowchess/tournament/redis/GameResultStreamListener.scala

@@ -0,0 +1,99 @@
+package de.nowchess.tournament.redis
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import de.nowchess.api.dto.GameWritebackEventDto
+import de.nowchess.tournament.config.RedisConfig
+import de.nowchess.tournament.service.TournamentService
+import io.quarkus.redis.datasource.RedisDataSource
+import io.quarkus.redis.datasource.stream.{StreamMessage, XGroupCreateArgs, XReadGroupArgs}
+import io.quarkus.runtime.Startup
+import jakarta.annotation.PostConstruct
+import jakarta.enterprise.context.ApplicationScoped
+import jakarta.inject.Inject
+import org.eclipse.microprofile.context.ManagedExecutor
+import org.jboss.logging.Logger
+import scala.compiletime.uninitialized
+import scala.jdk.CollectionConverters.*
+import scala.util.{Failure, Success, Try}
+import java.util.UUID
+
+@Startup
+@ApplicationScoped
+class GameResultStreamListener:
+  // scalafix:off DisableSyntax.var
+  @Inject var redis: RedisDataSource               = uninitialized
+  @Inject var objectMapper: ObjectMapper           = uninitialized
+  @Inject var tournamentService: TournamentService = uninitialized
+  @Inject var executor: ManagedExecutor            = uninitialized
+  @Inject var redisConfig: RedisConfig             = uninitialized
+  // scalafix:on
+
+  private val log        = Logger.getLogger(classOf[GameResultStreamListener])
+  private val groupName  = "tournament-result"
+  private val consumerId = UUID.randomUUID().toString
+
+  private def streamKey = s"${redisConfig.prefix}:game-writeback"
+
+  @PostConstruct
+  def startListening(): Unit =
+    createGroupIfAbsent()
+    executor.submit(
+      new Runnable:
+        def run(): Unit = pollLoop(),
+    )
+    log.infof("Tournament result listener started (consumer=%s)", consumerId)
+
+  private def createGroupIfAbsent(): Unit =
+    Try(redis.stream(classOf[String]).xgroupCreate(streamKey, groupName, "0", new XGroupCreateArgs().mkstream())) match
+      case Failure(ex) if Option(ex.getMessage).exists(_.contains("BUSYGROUP")) => ()
+      case Failure(ex) => log.warnf(ex, "Failed to create consumer group")
+      case Success(_)  => ()
+
+  private def pollLoop(): Unit =
+    // scalafix:off DisableSyntax.var
+    var running = true
+    // scalafix:on DisableSyntax.var
+    while running do
+      Try {
+        val messages = redis
+          .stream(classOf[String])
+          .xreadgroup(
+            groupName,
+            consumerId,
+            streamKey,
+            ">",
+            new XReadGroupArgs().count(10).block(java.time.Duration.ofSeconds(2)),
+          )
+        Option(messages).foreach(_.forEach(msg => handleMessage(msg)))
+      } match
+        case Failure(ex) if isInterrupted(ex) =>
+          Thread.currentThread().interrupt()
+          running = false
+        case Failure(ex) => log.warnf(ex, "Error in result poll loop")
+        case Success(_)  => ()
+
+  private def isInterrupted(ex: Throwable): Boolean =
+    ex match
+      case _: InterruptedException => true
+      case _ =>
+        Option(ex.getCause) match
+          case Some(_: InterruptedException) => true
+          case _                             => false
+
+  private def handleMessage(msg: StreamMessage[String, String, String]): Unit =
+    val json = msg.payload().get("data")
+    Try(objectMapper.readValue(json, classOf[GameWritebackEventDto])) match
+      case Failure(ex) =>
+        log.errorf(ex, "Unparseable game result event: %s", json)
+        ack(msg.id())
+      case Success(event) =>
+        if event.result.isDefined then
+          Try(tournamentService.handleGameResult(event.gameId, event.result.get, event.pgn)) match
+            case Failure(ex) => log.errorf(ex, "Failed to handle game result for %s", event.gameId)
+            case Success(_)  => ()
+        ack(msg.id())
+
+  private def ack(id: String): Unit =
+    Try(redis.stream(classOf[String]).xack(streamKey, groupName, id)) match
+      case Failure(ex) => log.warnf(ex, "Failed to ack message %s", id)
+      case Success(_)  => ()

modules/tournament/src/main/scala/de/nowchess/tournament/repository/PairingRepository.scala

@@ -0,0 +1,47 @@
+package de.nowchess.tournament.repository
+
+import de.nowchess.tournament.domain.TournamentPairing
+import jakarta.enterprise.context.ApplicationScoped
+import jakarta.inject.Inject
+import jakarta.persistence.EntityManager
+import scala.compiletime.uninitialized
+import scala.jdk.CollectionConverters.*
+import java.util.UUID
+
+@ApplicationScoped
+class PairingRepository:
+
+  @Inject
+  // scalafix:off DisableSyntax.var
+  var em: EntityManager = uninitialized
+  // scalafix:on
+
+  def findByTournamentId(tournamentId: String): List[TournamentPairing] =
+    em.createQuery("FROM TournamentPairing WHERE tournamentId = :tid", classOf[TournamentPairing])
+      .setParameter("tid", tournamentId)
+      .getResultList
+      .asScala
+      .toList
+
+  def findByTournamentIdAndRound(tournamentId: String, round: Int): List[TournamentPairing] =
+    em.createQuery(
+      "FROM TournamentPairing WHERE tournamentId = :tid AND round = :round",
+      classOf[TournamentPairing],
+    ).setParameter("tid", tournamentId)
+      .setParameter("round", round)
+      .getResultList
+      .asScala
+      .toList
+
+  def findByGameId(gameId: String): Option[TournamentPairing] =
+    em.createQuery("FROM TournamentPairing WHERE gameId = :gid", classOf[TournamentPairing])
+      .setParameter("gid", gameId)
+      .getResultList
+      .asScala
+      .headOption
+
+  def persist(p: TournamentPairing): TournamentPairing =
+    if Option(p.id).isEmpty then
+      em.persist(p)
+      p
+    else em.merge(p)

modules/tournament/src/main/scala/de/nowchess/tournament/repository/ParticipantRepository.scala

@@ -0,0 +1,43 @@
+package de.nowchess.tournament.repository
+
+import de.nowchess.tournament.domain.TournamentParticipant
+import jakarta.enterprise.context.ApplicationScoped
+import jakarta.inject.Inject
+import jakarta.persistence.EntityManager
+import scala.compiletime.uninitialized
+import scala.jdk.CollectionConverters.*
+import java.util.UUID
+
+@ApplicationScoped
+class ParticipantRepository:
+
+  @Inject
+  // scalafix:off DisableSyntax.var
+  var em: EntityManager = uninitialized
+  // scalafix:on
+
+  def findByTournamentId(tournamentId: String): List[TournamentParticipant] =
+    em.createQuery("FROM TournamentParticipant WHERE tournamentId = :tid", classOf[TournamentParticipant])
+      .setParameter("tid", tournamentId)
+      .getResultList
+      .asScala
+      .toList
+
+  def findByTournamentIdAndBotId(tournamentId: String, botId: String): Option[TournamentParticipant] =
+    em.createQuery(
+      "FROM TournamentParticipant WHERE tournamentId = :tid AND botId = :bid",
+      classOf[TournamentParticipant],
+    ).setParameter("tid", tournamentId)
+      .setParameter("bid", botId)
+      .getResultList
+      .asScala
+      .headOption
+
+  def persist(p: TournamentParticipant): TournamentParticipant =
+    if Option(p.id).isEmpty then
+      em.persist(p)
+      p
+    else em.merge(p)
+
+  def delete(p: TournamentParticipant): Unit =
+    em.remove(if em.contains(p) then p else em.merge(p))

modules/tournament/src/main/scala/de/nowchess/tournament/repository/TournamentRepository.scala

@@ -0,0 +1,33 @@
+package de.nowchess.tournament.repository
+
+import de.nowchess.tournament.domain.Tournament
+import jakarta.enterprise.context.ApplicationScoped
+import jakarta.inject.Inject
+import jakarta.persistence.EntityManager
+import scala.compiletime.uninitialized
+import scala.jdk.CollectionConverters.*
+
+@ApplicationScoped
+class TournamentRepository:
+
+  @Inject
+  // scalafix:off DisableSyntax.var
+  var em: EntityManager = uninitialized
+  // scalafix:on
+
+  def findOptById(id: String): Option[Tournament] =
+    Option(em.find(classOf[Tournament], id))
+
+  def findByStatus(status: String): List[Tournament] =
+    em.createQuery("FROM Tournament WHERE status = :status", classOf[Tournament])
+      .setParameter("status", status)
+      .getResultList
+      .asScala
+      .toList
+
+  def persist(t: Tournament): Tournament =
+    if em.contains(t) then t else em.merge(t)
+
+  def delete(t: Tournament): Unit =
+    val managed = if em.contains(t) then t else em.merge(t)
+    em.remove(managed)

modules/tournament/src/main/scala/de/nowchess/tournament/resource/TournamentResource.scala

@@ -0,0 +1,188 @@
+package de.nowchess.tournament.resource
+
+import de.nowchess.tournament.dto.*
+import de.nowchess.tournament.error.TournamentError
+import de.nowchess.tournament.service.{TournamentService, TournamentStreamManager}
+import io.smallrye.mutiny.Multi
+import jakarta.annotation.security.{PermitAll, RolesAllowed}
+import jakarta.enterprise.context.ApplicationScoped
+import jakarta.inject.Inject
+import jakarta.ws.rs.*
+import jakarta.ws.rs.core.{Context, HttpHeaders, MediaType, Response}
+import org.eclipse.microprofile.jwt.JsonWebToken
+import org.jboss.logging.Logger
+import scala.compiletime.uninitialized
+
+@Path("/api/tournament")
+@ApplicationScoped
+@Produces(Array(MediaType.APPLICATION_JSON))
+@Consumes(Array(MediaType.APPLICATION_JSON))
+class TournamentResource:
+
+  private val log = Logger.getLogger(classOf[TournamentResource])
+
+  // scalafix:off DisableSyntax.var
+  @Inject var tournamentService: TournamentService   = uninitialized
+  @Inject var streamManager: TournamentStreamManager = uninitialized
+  @Inject var jwt: JsonWebToken                      = uninitialized
+  // scalafix:on
+
+  @GET
+  @PermitAll
+  def list(): Response =
+    val (created, started, finished) = tournamentService.list()
+    val dto = TournamentListDto(
+      created = created.map(t => tournamentService.toDto(t)),
+      started = started.map(t => tournamentService.toDto(t)),
+      finished = finished.map(t => tournamentService.toDto(t)),
+    )
+    Response.ok(dto).build()
+
+  @POST
+  @RolesAllowed(Array("**"))
+  @Consumes(Array(MediaType.APPLICATION_FORM_URLENCODED))
+  def create(
+      @FormParam("name") name: String,
+      @FormParam("nbRounds") nbRounds: Int,
+      @FormParam("clockLimit") clockLimit: Int,
+      @FormParam("clockIncrement") clockIncrement: Int,
+      @FormParam("rated") @DefaultValue("true") rated: Boolean,
+  ): Response =
+    val userId = Option(jwt.getSubject).getOrElse("")
+    val form   = CreateTournamentForm(name, nbRounds, clockLimit, clockIncrement, rated)
+    val t      = tournamentService.create(userId, form)
+    Response.status(Response.Status.CREATED).entity(tournamentService.toDto(t)).build()
+
+  @GET
+  @Path("/{id}")
+  @PermitAll
+  def get(@PathParam("id") id: String): Response =
+    tournamentService.get(id) match
+      case None => Response.status(Response.Status.NOT_FOUND).entity(ErrorDto(s"Tournament $id not found")).build()
+      case Some(t) =>
+        val standings = tournamentService.getStandings(id)
+        Response.ok(tournamentService.toDto(t, standings)).build()
+
+  @DELETE
+  @Path("/{id}")
+  @RolesAllowed(Array("**"))
+  def terminate(@PathParam("id") id: String): Response =
+    val userId = Option(jwt.getSubject).getOrElse("")
+    tournamentService.terminate(id, userId) match
+      case Right(_)    => Response.noContent().build()
+      case Left(error) => errorResponse(error)
+
+  @POST
+  @Path("/{id}/start")
+  @RolesAllowed(Array("**"))
+  def start(@PathParam("id") id: String): Response =
+    val userId = Option(jwt.getSubject).getOrElse("")
+    tournamentService.start(id, userId) match
+      case Right(t)    => Response.ok(tournamentService.toDto(t)).build()
+      case Left(error) => errorResponse(error)
+
+  @POST
+  @Path("/{id}/join")
+  @RolesAllowed(Array("**"))
+  def join(@PathParam("id") id: String): Response =
+    val tokenType = Option(jwt.getClaim[AnyRef]("type")).map(_.toString).getOrElse("")
+    if tokenType != "bot" then
+      Response.status(Response.Status.FORBIDDEN).entity(ErrorDto("Only bots can join tournaments")).build()
+    else
+      val botId   = Option(jwt.getSubject).getOrElse("")
+      val botName = Option(jwt.getClaim[AnyRef]("name")).map(_.toString).getOrElse(botId)
+      tournamentService.join(id, botId, botName) match
+        case Right(_)    => Response.ok(OkDto()).build()
+        case Left(error) => errorResponse(error)
+
+  @POST
+  @Path("/{id}/withdraw")
+  @RolesAllowed(Array("**"))
+  def withdraw(@PathParam("id") id: String): Response =
+    val tokenType = Option(jwt.getClaim[AnyRef]("type")).map(_.toString).getOrElse("")
+    if tokenType != "bot" then
+      Response.status(Response.Status.FORBIDDEN).entity(ErrorDto("Only bots can withdraw")).build()
+    else
+      val botId = Option(jwt.getSubject).getOrElse("")
+      tournamentService.withdraw(id, botId) match
+        case Right(_)    => Response.ok(OkDto()).build()
+        case Left(error) => errorResponse(error)
+
+  @GET
+  @Path("/{id}/results")
+  @Produces(Array("application/x-ndjson"))
+  @PermitAll
+  def results(
+      @PathParam("id") id: String,
+      @QueryParam("nb") @DefaultValue("100") nb: Int,
+  ): Response =
+    tournamentService.get(id) match
+      case None => Response.status(Response.Status.NOT_FOUND).entity("").build()
+      case Some(_) =>
+        val ndjson = tournamentService
+          .getResults(id)
+          .take(nb)
+          .map { r =>
+            s"""{"rank":${r.rank},"points":${r.points},"tieBreak":${r.tieBreak},"bot":{"id":"${r.bot.id}","name":"${r.bot.name}"},"nbGames":${r.nbGames},"wins":${r.wins},"draws":${r.draws},"losses":${r.losses}}"""
+          }
+          .mkString("\n")
+        Response.ok(ndjson).`type`("application/x-ndjson").build()
+
+  @GET
+  @Path("/{id}/round/{round}")
+  @PermitAll
+  def roundPairings(@PathParam("id") id: String, @PathParam("round") round: Int): Response =
+    tournamentService.get(id) match
+      case None => Response.status(Response.Status.NOT_FOUND).entity(ErrorDto(s"Tournament $id not found")).build()
+      case Some(_) =>
+        val pairings = tournamentService.getPairings(id, round)
+        Response.ok(RoundPairingsDto(round, pairings)).build()
+
+  @GET
+  @Path("/{id}/export/games")
+  @PermitAll
+  @Produces(Array(MediaType.APPLICATION_JSON, MediaType.WILDCARD, "application/x-ndjson", "application/x-chess-pgn"))
+  def exportGames(@PathParam("id") id: String, @Context headers: HttpHeaders): Response =
+    tournamentService.get(id) match
+      case None => Response.status(Response.Status.NOT_FOUND).entity(ErrorDto(s"Tournament $id not found")).build()
+      case Some(_) =>
+        val acceptHeader = Option(headers.getHeaderString("Accept")).getOrElse("")
+        val pairings     = tournamentService.getAllPairings(id)
+        if acceptHeader.contains("application/x-ndjson") then
+          val ndjson = pairings
+            .filter(p => Option(p.whiteId).isDefined && Option(p.gameId).isDefined)
+            .map { p =>
+              val winner = Option(p.winner).map(w => s""""$w"""").getOrElse("null")
+              val moves  = Option(p.moveList).getOrElse("")
+              s"""{"id":"${p.gameId}","round":${p.round},"white":{"id":"${p.whiteId}","name":"${p.whiteName}"},"black":{"id":"${p.blackId}","name":"${p.blackName}"},"winner":$winner,"moves":"$moves"}"""
+            }
+            .mkString("\n")
+          Response.ok(ndjson).`type`("application/x-ndjson").build()
+        else
+          val pgn = pairings.flatMap(p => Option(p.moveList)).mkString("\n\n")
+          Response.ok(pgn).`type`("application/x-chess-pgn").build()
+
+  @GET
+  @Path("/{id}/stream")
+  @RolesAllowed(Array("**"))
+  @Produces(Array("application/x-ndjson"))
+  def stream(@PathParam("id") id: String): Multi[String] =
+    tournamentService.get(id) match
+      case None => Multi.createFrom().failure(new NotFoundException(s"Tournament $id not found"))
+      case Some(_) =>
+        val botId = Option(jwt.getSubject).getOrElse("")
+        Multi.createFrom().emitter[String] { emitter =>
+          streamManager.register(id, botId, emitter)
+          emitter.onTermination(() => streamManager.unregister(id, botId, emitter))
+        }
+
+  private def errorResponse(error: TournamentError): Response =
+    val status = error match
+      case TournamentError.NotFound(_)           => Response.Status.NOT_FOUND
+      case TournamentError.NotDirector           => Response.Status.FORBIDDEN
+      case TournamentError.NotABot               => Response.Status.FORBIDDEN
+      case TournamentError.WrongStatus(_)        => Response.Status.CONFLICT
+      case TournamentError.AlreadyJoined         => Response.Status.CONFLICT
+      case TournamentError.NotJoined             => Response.Status.CONFLICT
+      case TournamentError.NotEnoughParticipants => Response.Status.CONFLICT
+    Response.status(status).entity(ErrorDto(error.message)).build()

modules/tournament/src/main/scala/de/nowchess/tournament/service/SwissPairingService.scala

@@ -0,0 +1,73 @@
+package de.nowchess.tournament.service
+
+import de.nowchess.tournament.domain.{TournamentPairing, TournamentParticipant}
+import java.util.concurrent.ThreadLocalRandom
+
+object SwissPairingService:
+
+  def computePairings(
+      participants: List[TournamentParticipant],
+      pastPairings: List[TournamentPairing],
+  ): (List[(TournamentParticipant, TournamentParticipant)], Option[TournamentParticipant]) =
+    val sorted              = sortParticipants(participants)
+    val (remaining, byeOpt) = extractByePlayer(sorted)
+    val pairs               = buildPairs(remaining, pastPairings)
+    (pairs, byeOpt)
+
+  private def sortParticipants(participants: List[TournamentParticipant]): List[TournamentParticipant] =
+    participants.sortWith { (a, b) =>
+      if a.points != b.points then a.points > b.points
+      else if a.tieBreak != b.tieBreak then a.tieBreak > b.tieBreak
+      else a.botName < b.botName
+    }
+
+  private def extractByePlayer(
+      sorted: List[TournamentParticipant],
+  ): (List[TournamentParticipant], Option[TournamentParticipant]) =
+    if sorted.size % 2 == 0 then (sorted, None)
+    else
+      val minByes  = sorted.map(_.byeCount).min
+      val byeIndex = sorted.lastIndexWhere(_.byeCount == minByes)
+      val bye      = sorted(byeIndex)
+      (sorted.filterNot(_ eq bye), Some(bye))
+
+  private def buildPairs(
+      players: List[TournamentParticipant],
+      pastPairings: List[TournamentPairing],
+  ): List[(TournamentParticipant, TournamentParticipant)] =
+    val arr = players.toArray
+    resolveConflicts(arr, pastPairings)
+    arr
+      .grouped(2)
+      .flatMap {
+        case Array(a, b) => Some(assignColors(a, b))
+        case _           => None
+      }
+      .toList
+
+  private def resolveConflicts(arr: Array[TournamentParticipant], pastPairings: List[TournamentPairing]): Unit =
+    // scalafix:off DisableSyntax.var
+    var i = 0
+    // scalafix:on DisableSyntax.var
+    while i < arr.length - 1 do
+      if havePlayedBefore(arr(i), arr(i + 1), pastPairings) && i + 2 < arr.length then
+        val tmp = arr(i + 1)
+        arr(i + 1) = arr(i + 2)
+        arr(i + 2) = tmp
+      i += 2
+
+  private def havePlayedBefore(
+      a: TournamentParticipant,
+      b: TournamentParticipant,
+      pastPairings: List[TournamentPairing],
+  ): Boolean =
+    pastPairings.exists(p =>
+      (p.whiteId == a.botId && p.blackId == b.botId) ||
+        (p.whiteId == b.botId && p.blackId == a.botId),
+    )
+
+  private def assignColors(
+      a: TournamentParticipant,
+      b: TournamentParticipant,
+  ): (TournamentParticipant, TournamentParticipant) =
+    if ThreadLocalRandom.current().nextBoolean() then (a, b) else (b, a)

modules/tournament/src/main/scala/de/nowchess/tournament/service/TournamentService.scala

@@ -0,0 +1,329 @@
+package de.nowchess.tournament.service
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import de.nowchess.tournament.client.{CoreCreateGameRequest, CoreGameClient, CorePlayerInfo, CoreTimeControl}
+import de.nowchess.tournament.config.RedisConfig
+import de.nowchess.tournament.domain.{Tournament, TournamentPairing, TournamentParticipant}
+import de.nowchess.tournament.dto.{
+  BotRef,
+  Clock,
+  CreateTournamentForm,
+  PairingDto,
+  ResultDto,
+  Standing,
+  TournamentDto,
+  Variant,
+}
+import de.nowchess.tournament.error.TournamentError
+import de.nowchess.tournament.repository.{PairingRepository, ParticipantRepository, TournamentRepository}
+import io.quarkus.redis.datasource.RedisDataSource
+import jakarta.enterprise.context.ApplicationScoped
+import jakarta.inject.Inject
+import jakarta.transaction.Transactional
+import org.eclipse.microprofile.rest.client.inject.RestClient
+import org.jboss.logging.Logger
+import scala.compiletime.uninitialized
+import scala.util.{Failure, Success, Try}
+import java.time.Instant
+
+@ApplicationScoped
+class TournamentService:
+
+  private val log = Logger.getLogger(classOf[TournamentService])
+
+  // scalafix:off DisableSyntax.var
+  @Inject var tournamentRepository: TournamentRepository   = uninitialized
+  @Inject var participantRepository: ParticipantRepository = uninitialized
+  @Inject var pairingRepository: PairingRepository         = uninitialized
+  @Inject var streamManager: TournamentStreamManager       = uninitialized
+
+  @Inject
+  @RestClient
+  var coreGameClient: CoreGameClient = uninitialized
+
+  @Inject var redis: RedisDataSource     = uninitialized
+  @Inject var redisConfig: RedisConfig   = uninitialized
+  @Inject var objectMapper: ObjectMapper = uninitialized
+  // scalafix:on
+
+  @Transactional
+  def create(createdBy: String, form: CreateTournamentForm): Tournament =
+    val t = new Tournament()
+    t.id = scala.util.Random.alphanumeric.take(6).mkString
+    t.fullName = form.name
+    t.nbRounds = form.nbRounds
+    t.clockLimit = form.clockLimit
+    t.clockIncrement = form.clockIncrement
+    t.rated = form.rated
+    t.status = "created"
+    t.currentRound = 0
+    t.createdBy = createdBy
+    tournamentRepository.persist(t)
+    t
+
+  def get(id: String): Option[Tournament] =
+    tournamentRepository.findOptById(id)
+
+  def list(): (List[Tournament], List[Tournament], List[Tournament]) =
+    (
+      tournamentRepository.findByStatus("created"),
+      tournamentRepository.findByStatus("started"),
+      tournamentRepository.findByStatus("finished"),
+    )
+
+  @Transactional
+  def terminate(id: String, userId: String): Either[TournamentError, Unit] =
+    for
+      t <- tournamentRepository.findOptById(id).toRight(TournamentError.NotFound(id))
+      _ <- Either.cond(t.createdBy == userId, (), TournamentError.NotDirector)
+      _ <- Either.cond(t.status == "created", (), TournamentError.WrongStatus("created"))
+    yield tournamentRepository.delete(t)
+
+  @Transactional
+  def join(id: String, botId: String, botName: String): Either[TournamentError, Unit] =
+    for
+      t <- tournamentRepository.findOptById(id).toRight(TournamentError.NotFound(id))
+      _ <- Either.cond(t.status == "created", (), TournamentError.WrongStatus("created"))
+      _ <- Either.cond(
+        participantRepository.findByTournamentIdAndBotId(id, botId).isEmpty,
+        (),
+        TournamentError.AlreadyJoined,
+      )
+    yield
+      val p = new TournamentParticipant()
+      p.tournamentId = id
+      p.botId = botId
+      p.botName = botName
+      participantRepository.persist(p)
+
+  @Transactional
+  def withdraw(id: String, botId: String): Either[TournamentError, Unit] =
+    for
+      t <- tournamentRepository.findOptById(id).toRight(TournamentError.NotFound(id))
+      _ <- Either.cond(t.status == "created", (), TournamentError.WrongStatus("created"))
+      p <- participantRepository.findByTournamentIdAndBotId(id, botId).toRight(TournamentError.NotJoined)
+    yield participantRepository.delete(p)
+
+  @Transactional
+  def start(id: String, userId: String): Either[TournamentError, Tournament] =
+    for
+      t            <- tournamentRepository.findOptById(id).toRight(TournamentError.NotFound(id))
+      _            <- Either.cond(t.createdBy == userId, (), TournamentError.NotDirector)
+      _            <- Either.cond(t.status == "created", (), TournamentError.WrongStatus("created"))
+      participants <- validateMinParticipants(id)
+    yield
+      t.status = "started"
+      t.currentRound = 1
+      t.startsAt = Instant.now()
+      tournamentRepository.persist(t)
+      streamManager.publish(t.id, """{"type":"tournamentStarted"}""")
+      startRound(t, 1, participants)
+      t
+
+  private def validateMinParticipants(id: String): Either[TournamentError, List[TournamentParticipant]] =
+    val ps = participantRepository.findByTournamentId(id)
+    Either.cond(ps.size >= 2, ps, TournamentError.NotEnoughParticipants)
+
+  private def startRound(t: Tournament, round: Int, participants: List[TournamentParticipant]): Unit =
+    val pastPairings    = pairingRepository.findByTournamentId(t.id)
+    val (pairs, byeOpt) = SwissPairingService.computePairings(participants, pastPairings)
+    byeOpt.foreach(bye => createByePairing(t.id, round, bye))
+    pairs.foreach { case (white, black) => createRealPairing(t.id, round, white, black, t) }
+    streamManager.publish(t.id, s"""{"type":"roundStarted","round":$round}""")
+
+  private def createByePairing(tournamentId: String, round: Int, bye: TournamentParticipant): Unit =
+    val pairing = new TournamentPairing()
+    pairing.tournamentId = tournamentId
+    pairing.round = round
+    pairing.blackId = bye.botId
+    pairing.blackName = bye.botName
+    pairing.winner = "bye"
+    pairingRepository.persist(pairing)
+    bye.points += 0.5
+    bye.byeCount += 1
+    participantRepository.persist(bye)
+
+  private def createRealPairing(
+      tournamentId: String,
+      round: Int,
+      white: TournamentParticipant,
+      black: TournamentParticipant,
+      t: Tournament,
+  ): Unit =
+    val tc = CoreTimeControl(Some(t.clockLimit), Some(t.clockIncrement), None)
+    val req = CoreCreateGameRequest(
+      Some(CorePlayerInfo(white.botId, white.botName)),
+      Some(CorePlayerInfo(black.botId, black.botName)),
+      Some(tc),
+      Some("Authenticated"),
+    )
+    Try(coreGameClient.createGame(req)) match
+      case Failure(ex) => log.errorf(ex, "Failed to create game for round %d in tournament %s", round, tournamentId)
+      case Success(resp) =>
+        val pairing = new TournamentPairing()
+        pairing.tournamentId = tournamentId
+        pairing.round = round
+        pairing.whiteId = white.botId
+        pairing.whiteName = white.botName
+        pairing.blackId = black.botId
+        pairing.blackName = black.botName
+        pairing.gameId = resp.gameId
+        pairingRepository.persist(pairing)
+        streamManager.publishToBot(
+          tournamentId,
+          white.botId,
+          s"""{"type":"gameStart","round":$round,"gameId":"${resp.gameId}","color":"white"}""",
+        )
+        streamManager.publishToBot(
+          tournamentId,
+          black.botId,
+          s"""{"type":"gameStart","round":$round,"gameId":"${resp.gameId}","color":"black"}""",
+        )
+        publishBotGameStart(white.botName, resp.gameId, "white", white.botId)
+        publishBotGameStart(black.botName, resp.gameId, "black", black.botId)
+
+  private def publishBotGameStart(
+      botName: String,
+      gameId: String,
+      playingAs: String,
+      botAccountId: String,
+  ): Unit =
+    val channel = s"${redisConfig.prefix}:bot:$botName:events"
+    val payload = objectMapper.writeValueAsString(
+      Map(
+        "type"         -> "gameStart",
+        "gameId"       -> gameId,
+        "playingAs"    -> playingAs,
+        "difficulty"   -> 1500,
+        "botAccountId" -> botAccountId,
+      ),
+    )
+    Try(redis.pubsub(classOf[String]).publish(channel, payload)) match
+      case Failure(ex) => log.warnf(ex, "Failed to publish gameStart to bot channel %s", channel)
+      case Success(_)  => ()
+
+  @Transactional
+  def handleGameResult(gameId: String, result: String, pgn: String): Unit =
+    pairingRepository.findByGameId(gameId).foreach { pairing =>
+      val (winnerStr, wPts, bPts) = parseResult(result)
+      pairing.winner = winnerStr
+      pairing.moveList = pgn
+      pairingRepository.persist(pairing)
+      updateParticipantStats(pairing, wPts, bPts)
+      checkRoundCompletion(pairing.tournamentId)
+    }
+
+  private def parseResult(result: String): (String, Double, Double) = result match
+    case "1-0"     => ("white", 1.0, 0.0)
+    case "0-1"     => ("black", 0.0, 1.0)
+    case "1/2-1/2" => ("draw", 0.5, 0.5)
+    case _         => ("draw", 0.5, 0.5)
+
+  private def updateParticipantStats(pairing: TournamentPairing, wPts: Double, bPts: Double): Unit =
+    Option(pairing.whiteId).foreach { wId =>
+      participantRepository.findByTournamentIdAndBotId(pairing.tournamentId, wId).foreach { p =>
+        p.points += wPts
+        p.nbGames += 1
+        if wPts == 1.0 then p.wins += 1 else if wPts == 0.5 then p.draws += 1 else p.losses += 1
+        participantRepository.persist(p)
+      }
+    }
+    participantRepository.findByTournamentIdAndBotId(pairing.tournamentId, pairing.blackId).foreach { p =>
+      p.points += bPts
+      p.nbGames += 1
+      if bPts == 1.0 then p.wins += 1 else if bPts == 0.5 then p.draws += 1 else p.losses += 1
+      participantRepository.persist(p)
+    }
+
+  private def checkRoundCompletion(tournamentId: String): Unit =
+    tournamentRepository.findOptById(tournamentId).foreach { t =>
+      val roundPairings = pairingRepository.findByTournamentIdAndRound(tournamentId, t.currentRound)
+      val allDone       = roundPairings.nonEmpty && roundPairings.forall(p => Option(p.winner).isDefined)
+      if allDone then onRoundComplete(t)
+    }
+
+  private def onRoundComplete(t: Tournament): Unit =
+    streamManager.publish(t.id, s"""{"type":"roundFinished","round":${t.currentRound}}""")
+    recomputeBuchholz(t.id)
+    if t.currentRound >= t.nbRounds then finishTournament(t)
+    else
+      t.currentRound += 1
+      tournamentRepository.persist(t)
+      val participants = participantRepository.findByTournamentId(t.id)
+      startRound(t, t.currentRound, participants)
+
+  private def finishTournament(t: Tournament): Unit =
+    val participants = sortedStandings(participantRepository.findByTournamentId(t.id))
+    participants.headOption.foreach { winner =>
+      t.winnerId = winner.botId
+      t.winnerName = winner.botName
+    }
+    t.status = "finished"
+    tournamentRepository.persist(t)
+    val winnerInfo = participants.headOption
+      .map(w => s"""{"id":"${w.botId}","name":"${w.botName}"}""")
+      .getOrElse("null")
+    streamManager.publish(t.id, s"""{"type":"tournamentFinished","winner":$winnerInfo}""")
+
+  private def recomputeBuchholz(tournamentId: String): Unit =
+    val participants = participantRepository.findByTournamentId(tournamentId)
+    val pairings     = pairingRepository.findByTournamentId(tournamentId)
+    val pointsById   = participants.map(p => p.botId -> p.points).toMap
+    participants.foreach { p =>
+      val opponentIds = pairings.flatMap(pair =>
+        if pair.whiteId == p.botId then Some(pair.blackId)
+        else if pair.blackId == p.botId && Option(pair.whiteId).isDefined then Some(pair.whiteId)
+        else None,
+      )
+      p.tieBreak = opponentIds.flatMap(id => pointsById.get(id)).sum
+      participantRepository.persist(p)
+    }
+
+  def getStandings(tournamentId: String): List[ResultDto] =
+    val participants = sortedStandings(participantRepository.findByTournamentId(tournamentId))
+    participants.zipWithIndex.map { case (p, idx) =>
+      ResultDto(idx + 1, p.points, p.tieBreak, BotRef(p.botId, p.botName), p.nbGames, p.wins, p.draws, p.losses)
+    }
+
+  def getPairings(tournamentId: String, round: Int): List[PairingDto] =
+    pairingRepository.findByTournamentIdAndRound(tournamentId, round).map(toPairingDto)
+
+  def getAllPairings(tournamentId: String): List[TournamentPairing] =
+    pairingRepository.findByTournamentId(tournamentId)
+
+  def getResults(tournamentId: String): List[ResultDto] = getStandings(tournamentId)
+
+  def toDto(t: Tournament, standings: List[ResultDto] = Nil): TournamentDto =
+    val participants = participantRepository.findByTournamentId(t.id)
+    TournamentDto(
+      id = t.id,
+      fullName = t.fullName,
+      clock = Clock(t.clockLimit, t.clockIncrement),
+      variant = Variant("standard", "Standard"),
+      rated = t.rated,
+      nbPlayers = participants.size,
+      nbRounds = t.nbRounds,
+      createdBy = t.createdBy,
+      startsAt = Option(t.startsAt).map(_.toString),
+      status = t.status,
+      round = t.currentRound,
+      standing = Standing(1, standings),
+      winner = Option(t.winnerId).map(id => BotRef(id, t.winnerName)),
+    )
+
+  private def toPairingDto(p: TournamentPairing): PairingDto =
+    PairingDto(
+      id = p.id.toString,
+      round = p.round,
+      white = Option(p.whiteId).map(id => BotRef(id, p.whiteName)),
+      black = BotRef(p.blackId, p.blackName),
+      gameId = Option(p.gameId),
+      winner = Option(p.winner),
+    )
+
+  private def sortedStandings(participants: List[TournamentParticipant]): List[TournamentParticipant] =
+    participants.sortWith { (a, b) =>
+      if a.points != b.points then a.points > b.points
+      else if a.tieBreak != b.tieBreak then a.tieBreak > b.tieBreak
+      else a.botName < b.botName
+    }

modules/tournament/src/main/scala/de/nowchess/tournament/service/TournamentStreamManager.scala

@@ -0,0 +1,36 @@
+package de.nowchess.tournament.service
+
+import io.smallrye.mutiny.subscription.MultiEmitter
+import jakarta.enterprise.context.ApplicationScoped
+import java.util.concurrent.{ConcurrentHashMap, CopyOnWriteArrayList}
+import scala.jdk.CollectionConverters.*
+
+@ApplicationScoped
+class TournamentStreamManager:
+
+  private val tournamentEmitters = new ConcurrentHashMap[String, CopyOnWriteArrayList[MultiEmitter[? >: String]]]()
+  private val botEmitters        = new ConcurrentHashMap[String, CopyOnWriteArrayList[MultiEmitter[? >: String]]]()
+
+  private def botKey(tournamentId: String, botId: String): String = s"${tournamentId}:${botId}"
+
+  def register(tournamentId: String, botId: String, emitter: MultiEmitter[? >: String]): Unit =
+    tournamentEmitters
+      .computeIfAbsent(tournamentId, _ => new CopyOnWriteArrayList[MultiEmitter[? >: String]]())
+      .add(emitter)
+    botEmitters
+      .computeIfAbsent(botKey(tournamentId, botId), _ => new CopyOnWriteArrayList[MultiEmitter[? >: String]]())
+      .add(emitter)
+
+  def unregister(tournamentId: String, botId: String, emitter: MultiEmitter[? >: String]): Unit =
+    Option(tournamentEmitters.get(tournamentId)).foreach(_.remove(emitter))
+    Option(botEmitters.get(botKey(tournamentId, botId))).foreach(_.remove(emitter))
+
+  def publish(tournamentId: String, eventJson: String): Unit =
+    Option(tournamentEmitters.get(tournamentId)).foreach { list =>
+      list.asScala.foreach(e => scala.util.Try(e.emit(eventJson)))
+    }
+
+  def publishToBot(tournamentId: String, botId: String, eventJson: String): Unit =
+    Option(botEmitters.get(botKey(tournamentId, botId))).foreach { list =>
+      list.asScala.foreach(e => scala.util.Try(e.emit(eventJson)))
+    }

modules/tournament/src/test/resources/application.yml

@@ -0,0 +1,32 @@
+quarkus:
+  http:
+    port: 8088
+  application:
+    name: nowchess-tournament
+  datasource:
+    db-kind: h2
+    username: sa
+    password: ""
+    jdbc:
+      url: "jdbc:h2:mem:nowchess-tournament;DB_CLOSE_DELAY=-1"
+  hibernate-orm:
+    schema-management:
+      strategy: drop-and-create
+  arc:
+    exclude-types: de.nowchess.tournament.redis.GameResultStreamListener
+mp:
+  jwt:
+    verify:
+      publickey:
+        location: keys/test-public.pem
+      issuer: nowchess
+smallrye:
+  jwt:
+    sign:
+      key:
+        location: keys/test-private.pem
+nowchess:
+  internal:
+    secret: test-secret
+    auth:
+      enabled: false

modules/tournament/src/test/resources/keys/test-private.pem

@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----

modules/tournament/src/test/resources/keys/test-public.pem

@@ -0,0 +1,9 @@
+-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuMwR4ESzHs9m+sH3b70y
+VUfMcW6/5CVDIquKLdeCobU2hopBVvu+3s46KmmxVh+wjYw7wElgjNp+1z8S+H4V
+MM7024UWdlzTPNJSgfjiIz94aDS74HkjR20uAs7Tn5NiVbUBS0HWCf4LwaBT4AbW
+WDv0mVTC9vHeVPdia1kSAtXtR7daCsCiaDqrUya7P0bjpSkP3buJMGPJtIz8NOcB
+QNWETFAu/MSpJQlWArn2HsCFE3SsQEytGSlgaDwiZ8Q4PIMIKZ1dcB0KxxnG2b4X
+FYNxlqQ3GHZ6IFeK5bLMLOe/rgIRkckAZJpoVW/s0/i0+1lwzweOjJx5ChSGWsRJ
+BwIDAQAB
+-----END PUBLIC KEY-----

modules/tournament/src/test/scala/de/nowchess/tournament/resource/H2TestProfile.scala

@@ -0,0 +1,20 @@
+package de.nowchess.tournament.resource
+
+import io.quarkus.test.junit.QuarkusTestProfile
+import java.util.Map as JMap
+
+class H2TestProfile extends QuarkusTestProfile:
+
+  override def getConfigOverrides(): JMap[String, String] =
+    JMap.of(
+      "quarkus.datasource.db-kind",
+      "h2",
+      "quarkus.datasource.jdbc.url",
+      "jdbc:h2:mem:nowchess-tournament;DB_CLOSE_DELAY=-1",
+      "quarkus.datasource.username",
+      "sa",
+      "quarkus.datasource.password",
+      "",
+      "quarkus.hibernate-orm.schema-management.strategy",
+      "drop-and-create",
+    )

modules/tournament/src/test/scala/de/nowchess/tournament/resource/TournamentResourceTest.scala

@@ -0,0 +1,267 @@
+package de.nowchess.tournament.resource
+
+import de.nowchess.tournament.client.{CoreGameClient, CoreGameResponse}
+import io.quarkus.test.InjectMock
+import io.quarkus.test.junit.QuarkusTest
+import io.restassured.RestAssured
+import io.restassured.http.ContentType
+import io.restassured.response.ValidatableResponse
+import io.smallrye.jwt.build.Jwt
+import org.eclipse.microprofile.rest.client.inject.RestClient
+import org.hamcrest.Matchers.*
+import org.junit.jupiter.api.{BeforeEach, Test}
+import org.mockito.{ArgumentMatchers, Mockito}
+
+@QuarkusTest
+class TournamentResourceTest:
+
+  @InjectMock
+  @RestClient
+  // scalafix:off DisableSyntax.var
+  var coreGameClient: CoreGameClient = scala.compiletime.uninitialized
+  // scalafix:on
+
+  @BeforeEach
+  def setup(): Unit =
+    Mockito.when(coreGameClient.createGame(ArgumentMatchers.any())).thenReturn(CoreGameResponse("game-test-123"))
+
+  private def g() = RestAssured.`given`().contentType(ContentType.JSON)
+
+  private def directorToken(userId: String = "director-1"): String =
+    Jwt.issuer("nowchess").subject(userId).expiresIn(3600).sign()
+
+  private def botToken(botId: String, botName: String): String =
+    Jwt.issuer("nowchess").subject(botId).claim("type", "bot").claim("name", botName).expiresIn(3600).sign()
+
+  private def authed(token: String) =
+    g().header("Authorization", s"Bearer $token")
+
+  private def formAuthed(token: String) =
+    RestAssured.`given`().contentType(ContentType.URLENC).header("Authorization", s"Bearer $token")
+
+  private def createTournament(token: String, name: String = "Test Tour", nbRounds: Int = 3): String =
+    formAuthed(token)
+      .formParam("name", name)
+      .formParam("nbRounds", nbRounds)
+      .formParam("clockLimit", 300)
+      .formParam("clockIncrement", 5)
+      .formParam("rated", true)
+      .when()
+      .post("/api/tournament")
+      .`then`()
+      .statusCode(201)
+      .extract()
+      .path[String]("id")
+
+  private def postAndCheck(token: String, path: String, expectedStatus: Int): ValidatableResponse =
+    authed(token).when().post(path).`then`().statusCode(expectedStatus)
+
+  private def deleteAndCheck(token: String, path: String, expectedStatus: Int): ValidatableResponse =
+    authed(token).when().delete(path).`then`().statusCode(expectedStatus)
+
+  private def botJoin(tournamentId: String, botId: String, botName: String): ValidatableResponse =
+    val bt = botToken(botId, botName)
+    authed(bt).when().post(s"/api/tournament/$tournamentId/join").`then`().statusCode(200)
+
+  private def startTournament(token: String, tournamentId: String): ValidatableResponse =
+    authed(token).when().post(s"/api/tournament/$tournamentId/start").`then`().statusCode(200)
+
+  @Test
+  def createsTournamentWhenAuthenticated(): Unit =
+    formAuthed(directorToken())
+      .formParam("name", "Test Tour")
+      .formParam("nbRounds", 3)
+      .formParam("clockLimit", 300)
+      .formParam("clockIncrement", 5)
+      .formParam("rated", true)
+      .when()
+      .post("/api/tournament")
+      .`then`()
+      .statusCode(201)
+      .body("fullName", is("Test Tour"))
+      .body("status", is("created"))
+
+  @Test
+  def returns401WhenUnauthenticated(): Unit =
+    RestAssured
+      .`given`()
+      .contentType(ContentType.URLENC)
+      .formParam("name", "Test Tour")
+      .formParam("nbRounds", 3)
+      .formParam("clockLimit", 300)
+      .formParam("clockIncrement", 5)
+      .when()
+      .post("/api/tournament")
+      .`then`()
+      .statusCode(401)
+
+  @Test
+  def returnsEmptyListsOnFreshStart(): Unit =
+    RestAssured
+      .`given`()
+      .when()
+      .get("/api/tournament")
+      .`then`()
+      .statusCode(200)
+      .body("created", notNullValue())
+      .body("started", notNullValue())
+      .body("finished", notNullValue())
+
+  @Test
+  def returnsCreatedTournamentInCreatedList(): Unit =
+    val id = createTournament(directorToken("director-list"), "ListTour")
+    RestAssured
+      .`given`()
+      .when()
+      .get("/api/tournament")
+      .`then`()
+      .statusCode(200)
+      .body("created.id", hasItem(id))
+
+  @Test
+  def returns404ForUnknownId(): Unit =
+    RestAssured.`given`().when().get("/api/tournament/XXXXXX").`then`().statusCode(404)
+
+  @Test
+  def returnsTournamentWithStandings(): Unit =
+    val id = createTournament(directorToken("dir-get"), "GetTour")
+    RestAssured
+      .`given`()
+      .when()
+      .get(s"/api/tournament/$id")
+      .`then`()
+      .statusCode(200)
+      .body("id", is(id))
+      .body("standing", notNullValue())
+
+  @Test
+  def directorCanTerminateCreatedTournament(): Unit =
+    val token = directorToken("dir-term")
+    val id    = createTournament(token, "TermTour")
+    deleteAndCheck(token, s"/api/tournament/$id", 204)
+
+  @Test
+  def nonDirectorGets403OnTerminate(): Unit =
+    val id = createTournament(directorToken("dir-403"), "SecureTour")
+    deleteAndCheck(directorToken("other-user-403"), s"/api/tournament/$id", 403)
+
+  @Test
+  def cannotTerminateStartedTournament(): Unit =
+    val token = directorToken("dir-started")
+    val id    = createTournament(token, "StartedTour")
+    botJoin(id, "sbot-1", "StartBot1")
+    botJoin(id, "sbot-2", "StartBot2")
+    startTournament(token, id)
+    deleteAndCheck(token, s"/api/tournament/$id", 409)
+
+  @Test
+  def botJoinsSuccessfully(): Unit =
+    val id = createTournament(directorToken("dir-join"), "JoinTour")
+    authed(botToken("joinbot-1", "JoinBot1"))
+      .when()
+      .post(s"/api/tournament/$id/join")
+      .`then`()
+      .statusCode(200)
+      .body("ok", is(true))
+
+  @Test
+  def nonBotTokenReturns403OnJoin(): Unit =
+    val id = createTournament(directorToken("dir-nbjoin"), "NbJoinTour")
+    postAndCheck(directorToken("regular-user"), s"/api/tournament/$id/join", 403)
+
+  @Test
+  def alreadyJoinedReturns409(): Unit =
+    val id = createTournament(directorToken("dir-dbl"), "DblJoinTour")
+    val bt = botToken("dblbot-1", "DblBot1")
+    botJoin(id, "dblbot-1", "DblBot1")
+    authed(bt).when().post(s"/api/tournament/$id/join").`then`().statusCode(409)
+
+  @Test
+  def startedTournamentReturns409OnJoin(): Unit =
+    val token = directorToken("dir-sjoin")
+    val id    = createTournament(token, "SjoinTour")
+    botJoin(id, "sjbot-1", "SjBot1")
+    botJoin(id, "sjbot-2", "SjBot2")
+    startTournament(token, id)
+    authed(botToken("sjbot-3", "SjBot3")).when().post(s"/api/tournament/$id/join").`then`().statusCode(409)
+
+  @Test
+  def joinedBotCanWithdraw(): Unit =
+    val id = createTournament(directorToken("dir-wd"), "WdTour")
+    val bt = botToken("wdbot-1", "WdBot1")
+    botJoin(id, "wdbot-1", "WdBot1")
+    authed(bt)
+      .when()
+      .post(s"/api/tournament/$id/withdraw")
+      .`then`()
+      .statusCode(200)
+      .body("ok", is(true))
+
+  @Test
+  def notJoinedBotReturns409OnWithdraw(): Unit =
+    val id = createTournament(directorToken("dir-wdnj"), "WdnjTour")
+    val bt = botToken("wdnjbot-1", "WdnjBot1")
+    authed(bt).when().post(s"/api/tournament/$id/withdraw").`then`().statusCode(409)
+
+  @Test
+  def directorStartsWith2Bots(): Unit =
+    val token = directorToken("dir-start")
+    val id    = createTournament(token, "StartTour2")
+    botJoin(id, "stbot-1", "StBot1")
+    botJoin(id, "stbot-2", "StBot2")
+    postAndCheck(token, s"/api/tournament/$id/start", 200)
+
+  @Test
+  def nonDirectorReturns403OnStart(): Unit =
+    val id = createTournament(directorToken("dir-ndstart"), "NdStartTour")
+    botJoin(id, "ndstbot-1", "NdstBot1")
+    botJoin(id, "ndstbot-2", "NdstBot2")
+    postAndCheck(directorToken("other-ndstart"), s"/api/tournament/$id/start", 403)
+
+  @Test
+  def fewerThan2BotsReturns409OnStart(): Unit =
+    val token = directorToken("dir-1bot")
+    val id    = createTournament(token, "1BotTour")
+    botJoin(id, "onebot-1", "OneBot1")
+    postAndCheck(token, s"/api/tournament/$id/start", 409)
+
+  @Test
+  def resultsReturns200WithNdjsonContentType(): Unit =
+    val id = createTournament(directorToken("dir-res"), "ResTour")
+    RestAssured
+      .`given`()
+      .when()
+      .get(s"/api/tournament/$id/results")
+      .`then`()
+      .statusCode(200)
+      .contentType("application/x-ndjson")
+
+  @Test
+  def returnsPairingsForRoundAfterStart(): Unit =
+    val token = directorToken("dir-round")
+    val id    = createTournament(token, "RoundTour")
+    botJoin(id, "rndbot-1", "RndBot1")
+    botJoin(id, "rndbot-2", "RndBot2")
+    startTournament(token, id)
+    RestAssured.`given`().when().get(s"/api/tournament/$id/round/1").`then`().statusCode(200)
+
+  @Test
+  def returns404ForUnknownTournamentRound(): Unit =
+    RestAssured.`given`().when().get("/api/tournament/XXXXXX/round/1").`then`().statusCode(404)
+
+  @Test
+  def returnsPgnByDefault(): Unit =
+    val id = createTournament(directorToken("dir-pgn"), "PgnTour")
+    RestAssured.`given`().when().get(s"/api/tournament/$id/export/games").`then`().statusCode(200)
+
+  @Test
+  def returnsNdjsonWhenAcceptApplicationXNdjson(): Unit =
+    val id = createTournament(directorToken("dir-ndjson"), "NdjsonTour")
+    RestAssured
+      .`given`()
+      .header("Accept", "application/x-ndjson")
+      .when()
+      .get(s"/api/tournament/$id/export/games")
+      .`then`()
+      .statusCode(200)
+      .contentType("application/x-ndjson")

modules/tournament/src/test/scala/de/nowchess/tournament/service/SwissPairingServiceTest.scala

@@ -0,0 +1,78 @@
+package de.nowchess.tournament.service
+
+import de.nowchess.tournament.domain.{TournamentPairing, TournamentParticipant}
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.Assertions.*
+
+class SwissPairingServiceTest:
+
+  private def makeParticipant(
+      botId: String,
+      botName: String,
+      points: Double = 0.0,
+      byeCount: Int = 0,
+  ): TournamentParticipant =
+    val p = new TournamentParticipant()
+    p.botId = botId
+    p.botName = botName
+    p.points = points
+    p.byeCount = byeCount
+    p
+
+  @Test
+  def pairs2PlayersRandomlyAssignsColors(): Unit =
+    val p1           = makeParticipant("b1", "BotOne")
+    val p2           = makeParticipant("b2", "BotTwo")
+    val (pairs, bye) = SwissPairingService.computePairings(List(p1, p2), Nil)
+    assertEquals(1, pairs.size)
+    assertTrue(bye.isEmpty)
+    val (white, black) = pairs.head
+    val ids            = Set(white.botId, black.botId)
+    assertEquals(Set("b1", "b2"), ids)
+
+  @Test
+  def pairs4PlayersTopVsEachOther(): Unit =
+    val p1           = makeParticipant("b1", "A", points = 2.0)
+    val p2           = makeParticipant("b2", "B", points = 1.5)
+    val p3           = makeParticipant("b3", "C", points = 1.0)
+    val p4           = makeParticipant("b4", "D", points = 0.0)
+    val (pairs, bye) = SwissPairingService.computePairings(List(p1, p2, p3, p4), Nil)
+    assertEquals(2, pairs.size)
+    assertTrue(bye.isEmpty)
+    val pair1Ids = Set(pairs(0)._1.botId, pairs(0)._2.botId)
+    val pair2Ids = Set(pairs(1)._1.botId, pairs(1)._2.botId)
+    assertEquals(Set("b1", "b2"), pair1Ids)
+    assertEquals(Set("b3", "b4"), pair2Ids)
+
+  @Test
+  def oddCountLowestRankedGetsBye(): Unit =
+    val p1           = makeParticipant("b1", "A", points = 2.0)
+    val p2           = makeParticipant("b2", "B", points = 1.0)
+    val p3           = makeParticipant("b3", "C", points = 0.0)
+    val (pairs, bye) = SwissPairingService.computePairings(List(p1, p2, p3), Nil)
+    assertEquals(1, pairs.size)
+    assertTrue(bye.isDefined)
+    assertEquals("b3", bye.get.botId)
+
+  @Test
+  def avoidsRematchSwapsWhenPairAlreadyPlayed(): Unit =
+    val p1          = makeParticipant("b1", "A", points = 2.0)
+    val p2          = makeParticipant("b2", "B", points = 1.5)
+    val p3          = makeParticipant("b3", "C", points = 1.5)
+    val p4          = makeParticipant("b4", "D", points = 0.0)
+    val pastPairing = new TournamentPairing()
+    pastPairing.whiteId = "b1"
+    pastPairing.blackId = "b2"
+    val (pairs, _) = SwissPairingService.computePairings(List(p1, p2, p3, p4), List(pastPairing))
+    val pair1Ids   = Set(pairs(0)._1.botId, pairs(0)._2.botId)
+    assertFalse(pair1Ids == Set("b1", "b2"), "b1 and b2 should not be paired again")
+
+  @Test
+  def playerWithFewerByesGetsTheByeFirst(): Unit =
+    val p1           = makeParticipant("b1", "A", points = 1.0, byeCount = 1)
+    val p2           = makeParticipant("b2", "B", points = 0.5, byeCount = 0)
+    val p3           = makeParticipant("b3", "C", points = 0.0, byeCount = 0)
+    val (pairs, bye) = SwissPairingService.computePairings(List(p1, p2, p3), Nil)
+    assertEquals(1, pairs.size)
+    assertTrue(bye.isDefined)
+    assertEquals("b3", bye.get.botId)

modules/tournament/versions.env

@@ -0,0 +1,3 @@
+MAJOR=0
+MINOR=1
+PATCH=0

modules/ws/src/main/scala/de/nowchess/ws/resource/UserWebSocketResource.scala

@@ -2,15 +2,18 @@ package de.nowchess.ws.resource
 
 import de.nowchess.ws.config.RedisConfig
 import io.quarkus.redis.datasource.RedisDataSource
-import io.quarkus.redis.datasource.pubsub.PubSubCommands
+import io.quarkus.redis.datasource.stream.{XAddArgs, XGroupCreateArgs, XReadGroupArgs}
 import io.quarkus.websockets.next.*
 import io.smallrye.jwt.auth.principal.JWTParser
 import jakarta.inject.Inject
+import org.eclipse.microprofile.context.ManagedExecutor
 import org.jboss.logging.Logger
 import scala.compiletime.uninitialized
-import scala.util.Try
+import scala.jdk.CollectionConverters.*
+import scala.util.{Failure, Success, Try}
+import java.time.Duration
+import java.util.UUID
 import java.util.concurrent.ConcurrentHashMap
-import java.util.function.Consumer
 
 @WebSocket(path = "/api/user/ws")
 class UserWebSocketResource:
@@ -18,20 +21,22 @@ class UserWebSocketResource:
   private val log = Logger.getLogger(classOf[UserWebSocketResource])
 
   // scalafix:off DisableSyntax.var
-  @Inject
-  var redis: RedisDataSource = uninitialized
-
-  @Inject
-  var redisConfig: RedisConfig = uninitialized
-
-  @Inject
-  var jwtParser: JWTParser = uninitialized
+  @Inject var redis: RedisDataSource    = uninitialized
+  @Inject var redisConfig: RedisConfig  = uninitialized
+  @Inject var jwtParser: JWTParser      = uninitialized
+  @Inject var executor: ManagedExecutor = uninitialized
   // scalafix:on DisableSyntax.var
 
-  private val connections = new ConcurrentHashMap[String, (String, PubSubCommands.RedisSubscriber)]()
+  private val consumerId   = UUID.randomUUID().toString
+  private val maxRetries   = 3
+  private val maxStreamLen = 1000L
 
-  private def userTopic(userId: String): String =
-    s"${redisConfig.prefix}:user:$userId:events"
+  private val connections = new ConcurrentHashMap[String, (String, WebSocketConnection)]()
+
+  private def userStreamKey(userId: String): String =
+    s"${redisConfig.prefix}:user:$userId:events:stream"
+
+  private def dlqKey: String = s"${redisConfig.prefix}:dlq"
 
   @OnOpen
   def onOpen(connection: WebSocketConnection, handshake: HandshakeRequest): Unit =
@@ -45,16 +50,76 @@ class UserWebSocketResource:
         log.warn("WebSocket opened with no valid JWT — closing connection")
         connection.close().subscribe().`with`(_ => (), _ => ())
       case Some(userId) =>
-        log.infof("User WebSocket opened — userId=%s", userId)
-        val handler: Consumer[String] = msg => connection.sendText(msg).subscribe().`with`(_ => (), _ => ())
-        val subscriber                = redis.pubsub(classOf[String]).subscribe(userTopic(userId), handler)
-        connections.put(connection.id(), (userId, subscriber))
+        log.infof("User WebSocket opened — userId=%s connId=%s", userId, connection.id())
+        createGroupIfAbsent(userId, connection.id())
+        connections.put(connection.id(), (userId, connection))
+        executor.submit(
+          new Runnable:
+            def run(): Unit = pollLoop(connection.id(), userId, connection),
+        )
         val connectedMsg = s"""{"type":"CONNECTED","userId":"$userId"}"""
         connection.sendText(connectedMsg).subscribe().`with`(_ => (), _ => ())
 
   @OnClose
   def onClose(connection: WebSocketConnection): Unit =
     log.infof("User WebSocket closed — connectionId=%s", connection.id())
-    Option(connections.remove(connection.id())).foreach { (userId, subscriber) =>
-      subscriber.unsubscribe(userTopic(userId))
-    }
+    connections.remove(connection.id())
+
+  private def createGroupIfAbsent(userId: String, groupName: String): Unit =
+    Try(
+      redis
+        .stream(classOf[String])
+        .xgroupCreate(userStreamKey(userId), groupName, "$", new XGroupCreateArgs().mkstream()),
+    ) match
+      case Failure(ex) if Option(ex.getMessage).exists(_.contains("BUSYGROUP")) => ()
+      case Failure(ex) => log.warnf(ex, "Failed to create consumer group for userId=%s", userId)
+      case Success(_)  => ()
+
+  private def pollLoop(connectionId: String, userId: String, myConnection: WebSocketConnection): Unit =
+    while Option(connections.get(connectionId)).exists(_._2 eq myConnection) do
+      Try {
+        val messages = redis
+          .stream(classOf[String])
+          .xreadgroup(
+            connectionId,
+            consumerId,
+            userStreamKey(userId),
+            ">",
+            new XReadGroupArgs().count(10).block(Duration.ofSeconds(2)),
+          )
+        Option(messages).foreach(_.forEach { msg =>
+          if Option(connections.get(connectionId)).exists(_._2 eq myConnection) then
+            val json    = msg.payload().get("data")
+            val attempt = Option(msg.payload().get("attempt")).flatMap(_.toIntOption).getOrElse(0)
+            Try(myConnection.sendText(json).await().atMost(Duration.ofSeconds(5))) match
+              case Success(_) =>
+                ack(connectionId, userId, msg.id())
+              case Failure(_) if attempt + 1 < maxRetries =>
+                xadd(userStreamKey(userId), json, attempt + 1)
+                ack(connectionId, userId, msg.id())
+              case Failure(ex) =>
+                log.warnf(ex, "Delivery failed for userId=%s after %d attempts, sending to DLQ", userId, maxRetries)
+                xadd(dlqKey, json, attempt)
+                ack(connectionId, userId, msg.id())
+        })
+      } match
+        case Failure(ex) => log.warnf(ex, "Error in poll loop for userId=%s", userId)
+        case Success(_)  => ()
+
+  private def ack(groupName: String, userId: String, id: String): Unit =
+    Try(redis.stream(classOf[String]).xack(userStreamKey(userId), groupName, id)) match
+      case Failure(ex) => log.warnf(ex, "Failed to ack message %s for userId=%s", id, userId)
+      case Success(_)  => ()
+
+  private def xadd(key: String, json: String, attempt: Int): Unit =
+    Try(
+      redis
+        .stream(classOf[String])
+        .xadd(
+          key,
+          new XAddArgs().maxlen(maxStreamLen).nearlyExactTrimming(),
+          Map("data" -> json, "attempt" -> attempt.toString).asJava,
+        ),
+    ) match
+      case Failure(ex) => log.warnf(ex, "Failed to publish to stream %s", key)
+      case Success(_)  => ()

settings.gradle.kts

@@ -26,4 +26,5 @@ include(
     "modules:ws",
     "modules:store",
     "modules:coordinator",
+    "modules:tournament",
 )