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openspec/changes/enterprise-gaming-api-plugin-game-server/proposal.md

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+# OpenSpec Change: enterprise-gaming-api-plugin-game-server
+
+- **Change ID**: enterprise-gaming-api-plugin-game-server
+- **Package**: `@suaveplan/api-plugin-game-server`
+- **Category**: gaming/server
+- **Target path**: `gaming/server/api-plugin-game-server`
+- **Status**: PROPOSED
+- **Date**: 2026-04-24
+- **Reference spec**: `/mnt/s/web/suaveplan/enterprise/api-plugin-game-server.md`
+
+---
+
+## Summary
+
+Deliver `@suaveplan/api-plugin-game-server` on the genesis branch from scratch at enterprise quality. The package wraps `@suaveplan/game-server`'s `SessionManager` in a Hono HTTP plugin. Routes expose session lifecycle (create, list, join, leave, heartbeat, terminate), player management (add/remove/list), and server health. A `definePlugin()` factory registers the `SessionManager` as an injectable service. Genesis adds Zod request/response schemas, structured errors, OTel route instrumentation, and 100% coverage with Hono test client integration tests.
+
+---
+
+## Current-state audit (genesis)
+
+Package does not exist on genesis yet — fresh build.
+
+---
+
+## Available workspace deps on genesis
+
+| Package | Role |
+|---|---|
+| `@suaveplan/error` (`workspace:^`) | HTTP error mapping |
+| `@suaveplan/game-server` (`workspace:^`) | `SessionManager`, `Session` core logic |
+| `@suaveplan/events` (`workspace:^`) | Session event forwarding |
+| `zod` (`catalog:forms`) | Request/response schemas |
+| `@opentelemetry/api` (`catalog:observability`) | Route span instrumentation |
+
+---
+
+## HTTP Routes
+
+| Method | Path | Description |
+|---|---|---|
+| `POST` | `/sessions` | Create session |
+| `GET` | `/sessions` | List sessions |
+| `GET` | `/sessions/:id` | Get session |
+| `DELETE` | `/sessions/:id` | Terminate session |
+| `POST` | `/sessions/:id/join` | Player join |
+| `POST` | `/sessions/:id/leave` | Player leave |
+| `POST` | `/sessions/:id/heartbeat` | Update heartbeat |
+| `GET` | `/sessions/:id/players` | List players |
+| `GET` | `/health` | Session manager health |
+
+---
+
+## File layout
+
+```text
+gaming/server/api-plugin-game-server/
+  package.json
+  tsconfig.json
+  vitest.config.ts
+  src/
+    index.ts
+    error-codes.ts
+    types/common.ts
+    types/common.md
+    routes/
+      sessions.ts
+      sessions.md
+      players.ts
+      health.ts
+    plugin.ts
+    plugin.md
+  tests/
+    integration.test.ts
+```
+
+---
+
+## Impact
+
+**Downstream**: `@suaveplan/api-plugin-matchmaking` posts to this to assign matches. Prerequisites: `@suaveplan/error`, `@suaveplan/game-server`, `@suaveplan/events`.