fix(studio): Add solid floor collision, live 3D gizmo dragging, inspector property sync, and nudge shortcuts

- Creator Studio: Visual behavior & property inspector, GLB model importer, binary persistence
- Trust & Safety: 18+ TOS confirmation (DOB removed), creator guidelines & briefing card on join, in-game reporting HUD
- Test Harness: Add --filter, --skip-backend, --skip-godot to run_checkpoint_tests.py

.gitea/workflows/checkpoint.yml

@@ -0,0 +1,39 @@
+name: checkpoint
+
+# Runs the full checkpoint suite (migrations, backend pytest, Godot smoke
+# tests, multiplayer, fresh-clone boot) on every push and PR.
+#
+# Runs on a `host`-label act_runner on the AGP box: Docker, ~/godot/godot,
+# and Python 3 are already there. Deliberately uses no JavaScript actions
+# (actions/checkout etc.) so the host needs no Node install -- checkout is a
+# plain git clone from the local Gitea. See docs/ci.md.
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  checkpoint:
+    runs-on: host
+    steps:
+      - name: Checkout
+        run: |
+          set -eu
+          rm -rf repo && mkdir repo && cd repo
+          git init -q
+          git remote add origin "http://x:${{ github.token }}@localhost:3000/${{ github.repository }}.git"
+          git fetch -q --depth 1 origin "${{ github.sha }}"
+          git checkout -q FETCH_HEAD
+
+      - name: Python env
+        working-directory: repo
+        run: |
+          set -eu
+          python3 -m venv .venv
+          .venv/bin/pip install --quiet --upgrade pip
+          .venv/bin/pip install --quiet -r backend/requirements.txt
+
+      - name: Checkpoint suite
+        working-directory: repo
+        run: .venv/bin/python scripts/run_checkpoint_tests.py --postgres-port 25690 --backend-port 18690

.gitignore

@@ -11,3 +11,8 @@ Thumbs.db
 
 # Godot UID files (regenerated from path)
 *.uid
+assets/build_info.json
+
+# Dynamic uploads
+uploads/
+backend/uploads/

.godot/.gdignore

@@ -1 +0,0 @@
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.godot/editor/project_metadata.cfg

@@ -1,11 +0,0 @@
-[game_view]
-
-select_mode=0
-
-[editor_metadata]
-
-executable_path="/home/daddy/godot/godot"
-
-[recent_files]
-
-scenes=["res://scenes/main_menu.tscn", "res://scenes/server.tscn"]

.godot/editor/server.tscn-folding-73010d7d11a63b36042ee0ee3baaed9c.cfg

@@ -1,5 +0,0 @@
-[folding]
-
-node_unfolds=[]
-resource_unfolds=[]
-nodes_folded=[]

.godot/global_script_class_cache.cfg

@@ -1,105 +0,0 @@
-list=[{
-"base": &"Node3D",
-"class": &"Chunk",
-"icon": "",
-"is_abstract": false,
-"is_tool": false,
-"language": &"GDScript",
-"path": "res://scripts/chunk.gd"
-}, {
-"base": &"RefCounted",
-"class": &"ChunkDataDecoder",
-"icon": "",
-"is_abstract": false,
-"is_tool": false,
-"language": &"GDScript",
-"path": "res://scripts/chunk_data_decoder.gd"
-}, {
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-"class": &"ChunkScene",
-"icon": "",
-"is_abstract": false,
-"is_tool": false,
-"language": &"GDScript",
-"path": "res://scripts/chunk_scene.gd"
-}, {
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-"class": &"ChunkStreamManager",
-"icon": "",
-"is_abstract": false,
-"is_tool": false,
-"language": &"GDScript",
-"path": "res://scripts/chunk_stream_manager.gd"
-}, {
-"base": &"Node3D",
-"class": &"DynamicObjectNode",
-"icon": "",
-"is_abstract": false,
-"is_tool": false,
-"language": &"GDScript",
-"path": "res://scripts/dynamic_object_node.gd"
-}, {
-"base": &"Node",
-"class": &"NetworkClient",
-"icon": "",
-"is_abstract": false,
-"is_tool": false,
-"language": &"GDScript",
-"path": "res://scripts/network_client.gd"
-}, {
-"base": &"CharacterBody3D",
-"class": &"Player",
-"icon": "",
-"is_abstract": false,
-"is_tool": false,
-"language": &"GDScript",
-"path": "res://scripts/player.gd"
-}, {
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-"class": &"PlayerNode",
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-"is_tool": false,
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-"path": "res://scripts/player_spawner.gd"
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-}]

AGENTS.md

@@ -0,0 +1,40 @@
+# ModBison (Project & Agent Guidelines)
+
+> **CRITICAL REBRANDING NOTICE**
+> - **Game Name**: **ModBison** (formerly `agp-game`).
+>   - "ModBison" represents a play on game modification and the 1960s British "mod" subculture, adhering to the user's "bison" project naming convention (e.g. host machine `cloudbison`, Windows client machine `pinkbison`, social platform `WiseBison`).
+> - **In-Game Currency**: **Buffalo Chips** (formerly `Credits` / `CR`).
+>   - Named playfully after bison poop. Displayed throughout all UI menus, wallet, marketplace, and creator payout screens as "Buffalo Chips".
+> - **Git Repository**:
+>   - Local clone path: `/home/daddy/modbison` (symlinked as `/home/daddy/agp-game-dev` for backwards compatibility).
+>   - Gitea repository name: `modbison`
+>   - Clone URL: `http://localhost:3000/daddy/modbison.git`
+>   - Web UI: `https://git.cloudbison.duckdns.org/daddy/modbison`
+> - **Binaries & Exports**:
+>   - Windows: `modbison.exe` (legacy alias `agp-game.exe` maintained for backwards compatibility)
+>   - Linux: `modbison.x86_64`
+
+---
+
+## Architecture Overview
+
+1. **Client**: Godot 4.6.2 (GDScript).
+   - Headless engine binary located at `~/godot/godot`.
+   - Export presets defined in `export_presets.cfg`.
+   - Main scenes in `res://scenes/` (`main_menu.tscn`, `world_3d.tscn`, `wallet_ui.tscn`, `marketplace_ui.tscn`, `selling_payout_ui.tscn`, etc.).
+   - Scripts in `res://scripts/`.
+
+2. **Backend**: FastAPI + SQLAlchemy (asyncpg) + Alembic in `backend/`.
+   - Python environment: `/home/daddy/agp/venv` (or project `.venv`).
+   - Runtime game server supervisor allocates headless Godot instances per active world session under `/tmp/modbison-game-servers`.
+
+3. **Orchestration & Playtesting (`/home/daddy/agp`)**:
+   - PM Dashboard: `http://localhost:7070` (`agp-dashboard.service`).
+   - Checkpoint system: `pm/checkpoint_ops.py` controls playtest instances (`PC1` through `PC5`).
+   - Current active checkpoint: **PC5** (backend on `http://192.168.58.138:28005`, postgres on `25545`).
+   - Building Windows package: `PYTHONPATH=. /home/daddy/agp/venv/bin/python3 -c "import pm.checkpoint_ops as ops; ops.build_exe('PC5')"`
+
+4. **Testing Protocols**:
+   - Headless smoke tests: `AGP_API_BASE_URL=http://127.0.0.1:28005 ~/godot/godot --headless --path . --script res://scripts/smoke_test_<name>.gd`
+   - Fast checkpoint tests: `PYTHONPATH=. /home/daddy/agp/venv/bin/python3 scripts/run_checkpoint_tests.py --skip-backend --filter <keyword>`
+   - Backend pytest: `PYTHONPATH=. /home/daddy/agp/venv/bin/pytest backend/tests`

CLAUDE.md

@@ -0,0 +1,18 @@
+# ModBison Guidelines for Claude Code
+
+See [AGENTS.md](AGENTS.md) for full project conventions.
+
+### Quick Reference:
+- **Game Name**: ModBison (formerly agp-game)
+- **Currency**: Buffalo Chips (formerly Credits / CR)
+- **Repo URL**: `http://localhost:3000/daddy/modbison.git` (`https://git.cloudbison.duckdns.org/daddy/modbison`)
+- **Working Tree**: `/home/daddy/modbison` (or `/home/daddy/agp-game-dev`)
+- **Windows Executable**: `modbison.exe`
+- **Linux Executable**: `modbison.x86_64`
+
+### Commands:
+- **Run tests**:
+  - Backend: `PYTHONPATH=. /home/daddy/agp/venv/bin/pytest backend/tests`
+  - Godot UI smoke tests: `AGP_API_BASE_URL=http://127.0.0.1:28004 ~/godot/godot --headless --path . --script res://scripts/smoke_test_<name>.gd`
+- **Rebuild PC4 Windows package**:
+  - `PYTHONPATH=. /home/daddy/agp/venv/bin/python3 -c "import pm.checkpoint_ops as ops; ops.build_exe('PC4')"`

README.md

@@ -1,3 +1,129 @@
-# agp-game
+# ModBison
 
-Agentic Game Platform - Godot game built by autonomous agents
+> **Godot 4 Multiplayer Sandbox Platform**  
+> Customizable 3D avatars, real-time multiplayer worlds, in-game building tools, social community hubs, and a creator economy powered by **Buffalo Chips**.
+
+---
+
+## 🦬 About ModBison
+
+**ModBison** (formerly `agp-game`) is a collaborative sandbox game and platform built in Godot 4 and Python FastAPI. 
+
+* **The Name**: "ModBison" is a double play on game modification and the 1960s British "mod" youth subculture, aligning with the host and infrastructure naming convention (`cloudbison`, `pinkbison`, `WiseBison`).
+* **The Currency**: **Buffalo Chips** — the in-game virtual currency used for marketplace trading, creator selling, and cash payouts (a playful reference to bison poop).
+
+---
+
+## 🏛️ Architecture Overview
+
+The platform consists of two integrated environments:
+
+1. **Client & Game Server (`modbison`)**:
+   - Built with **Godot 4.6.2** (GDScript).
+   - Headless Godot dedicated server (`scenes/server.tscn`) spawned per active world session via high ENet ports.
+   - Dual-platform export configuration: Windows Desktop (`modbison.exe`) and Linux (`modbison.x86_64`).
+   - Binary chunk streaming and client-side interpolation.
+
+2. **Backend & Orchestration Platform (`agp`)**:
+   - **FastAPI** (Python 3.12) REST API with **PostgreSQL** (asyncpg) and **Alembic** migrations.
+   - **Redis** for real-time presence heartbeats and pub/sub messaging.
+   - **Game Server Supervisor**: Dynamic headless Godot instance orchestrator allocating runtime servers in `/tmp/modbison-game-servers`.
+   - **PM Dashboard & Checkpoints**: Live orchestration dashboard running at `http://localhost:7070` managing Package Checkpoints (**PC1** through **PC4**).
+
+---
+
+## ✨ What Has Been Built (Feature Summary)
+
+### 1. 👤 3D Avatar & Customization Engine
+* **Canonical Rig**: 24-bone skeleton supporting attachment sockets for Head, Hair, Face, Chest, Pants, Left/Right Hand, Left/Right Foot, and Accessories.
+* **Customization Studio** (`scenes/avatar_customization.tscn`): Full 3D turntable preview, orbit camera controls, slot-based equipment, RGB tint pickers, and backend persistence (`/api/avatar/loadout`).
+* **Multiplayer Replication**: Remote players receive complete avatar loadout dictionaries via RPC upon joining, dynamically assembling meshes and materials in real time.
+* **Solid Double-Sided Rendering**: Fixed polygon winding order and material setups to ensure characters render fully solid from all camera angles.
+
+### 2. 🌍 Multiplayer World & Chunk Streaming
+* **Dedicated Server Architecture**: Server-authoritative player movement, client prediction, reconciliation, and collision boundaries.
+* **Chunk Streaming**: Binary stream encoding/decoding (`chunk_codec.py` / `chunk_data_decoder.gd`) enabling real-time streaming of world geometry, collision boxes, and dynamic props as players explore.
+* **Stable Spawn System**: Server-authoritative solid ground anchoring ensuring players never fall into the void upon connection.
+
+### 3. 🛠️ In-Game World Editor & Sandboxed Scripting
+* **Runtime World Editor** (`scripts/editor/`): In-game tool registry, block/prop palette, selection manager, raycast placement/deletion, and undo/redo action stacks.
+* **Chunk Persistence** (`chunk_save_service.gd`): Saves player modifications and created structures back to the world backend.
+* **Rule-Based Scripting** (`scripts/scripting/`): Sandboxed behavior interpreter (`script_interpreter.gd`, `script_rule.gd`) allowing props to trigger gameplay actions, inventory changes, and spawn events.
+* **In-Game HUD Bar**: Hotkey-driven overlay bar giving players instant access to build tools and menus while inside a live world.
+
+### 4. 👥 Social, Chat & Clans
+* **Friends & Presence** (`scenes/friends_presence_ui.tscn`): Friend requests, accept/decline flows, and live online/in-world presence heartbeats via Redis.
+* **Multi-Channel Chat** (`scenes/chat_ui.tscn`): Direct messaging (DM), group chat, and spatial in-world chat with automated text filtering (`text_filter.py`).
+* **Groups & Clans** (`scenes/groups_ui.tscn`): Group creation, member roles, descriptions, and membership rosters.
+
+### 5. 💰 Virtual Economy & Creator Payouts
+* **In-Game Currency**: **Buffalo Chips** displayed across all menus, wallets, listings, and payout screens.
+* **Wallet UI** (`scenes/wallet_ui.tscn`): Live balance display, quick-purchase packs (+100, +500, +1,000, +5,000 Buffalo Chips), and transaction history ledger.
+* **Marketplace UI** (`scenes/marketplace_ui.tscn`): Browse items for sale, filter by price in Buffalo Chips, search catalog, and instant purchase with inventory delivery.
+* **Creator Selling & Payouts** (`scenes/selling_payout_ui.tscn`): Catalog item listing, price configuration, escrow tracking (Available, In Escrow, Lifetime Earned), and cash payout requests (minimum 100 Buffalo Chips).
+
+### 6. 🌐 Discovery & Catalog
+* **World Discovery UI** (`scenes/discovery_ui.tscn`): Public world browser with search by title, tags, or category.
+* **Trending Algorithm**: Decay-weighted play counts ranking popular worlds on the discovery front page.
+
+---
+
+## 🎮 In-Game Controls & Hotkeys
+
+| Key | Action |
+| :--- | :--- |
+| **`W` `A` `S` `D`** | Move character |
+| **`Space`** | Jump |
+| **`Mouse`** | Look / Camera rotation |
+| **`T`** or **`Enter`** | Open Chat |
+| **`Tab`** or **`F1`** | Open Friends & Social Panel |
+| **`F2`** | Toggle In-Game World Editor |
+| **`ESC`** | Close current modal / Toggle In-Game HUD Menu |
+
+---
+
+## 🚀 Development, Testing & Builds
+
+### Automated Smoke Tests (Headless Godot)
+All UI panels and client subsystems have headless GDScript smoke tests:
+```bash
+# Set target backend (e.g. PC4 playtest instance)
+export AGP_API_BASE_URL=http://127.0.0.1:28004
+
+# Run individual UI & subsystem smoke tests
+~/godot/godot --headless --path . --script res://scripts/smoke_test_main_menu_full_flow.gd
+~/godot/godot --headless --path . --script res://scripts/smoke_test_marketplace_ui.gd
+~/godot/godot --headless --path . --script res://scripts/smoke_test_wallet_ui.gd
+~/godot/godot --headless --path . --script res://scripts/smoke_test_selling_payout_ui.gd
+~/godot/godot --headless --path . --script res://scripts/smoke_test_avatar_in_world.gd
+```
+
+### Backend Test Suite
+```bash
+# Run 335+ FastAPI & SQLAlchemy test suite
+PYTHONPATH=. /home/daddy/agp/venv/bin/pytest backend/tests
+```
+
+### Building Release Binaries
+```bash
+# Export Linux and Windows binaries
+scripts/build.sh
+
+# Or build pre-configured Windows package for current checkpoint (PC4):
+PYTHONPATH=. /home/daddy/agp/venv/bin/python3 -c "import pm.checkpoint_ops as ops; ops.build_exe('PC4')"
+```
+Output artifacts:
+- Windows: `export/windows/modbison.exe` (or `agp/playtest/PC4/build/windows/modbison.exe`)
+- Linux: `export/linux/modbison.x86_64`
+
+---
+
+## 📦 Project Links & Configuration
+
+* **Gitea Repository**: `http://localhost:3000/daddy/modbison.git`
+* **Web Interface**: [https://git.cloudbison.duckdns.org/daddy/modbison](https://git.cloudbison.duckdns.org/daddy/modbison)
+* **Active Playtest Instance**: **PC4**
+  - Backend URL: `http://192.168.58.138:28004`
+  - Database: PostgreSQL on port `25544`
+* **PM Dashboard**: `http://localhost:7070`
+* **Working Directory**: `/home/daddy/modbison` (symlinked as `/home/daddy/agp-game-dev`)

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+compress/channel_pack=0
+mipmaps/generate=true
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/channel_remap/red=0
+process/channel_remap/green=1
+process/channel_remap/blue=2
+process/channel_remap/alpha=3
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

assets/props/buffalo_chip_coin.glb.import

@@ -0,0 +1,42 @@
+[remap]
+
+importer="scene"
+importer_version=1
+type="PackedScene"
+uid="uid://dxjew7eex2jh4"
+path="res://.godot/imported/buffalo_chip_coin.glb-ccee212ee6fb7ddcc2555bc23ea60f4b.scn"
+
+[deps]
+
+source_file="res://assets/props/buffalo_chip_coin.glb"
+dest_files=["res://.godot/imported/buffalo_chip_coin.glb-ccee212ee6fb7ddcc2555bc23ea60f4b.scn"]
+
+[params]
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+nodes/use_name_suffixes=true
+nodes/use_node_type_suffixes=true
+meshes/ensure_tangents=true
+meshes/generate_lods=true
+meshes/create_shadow_meshes=true
+meshes/light_baking=1
+meshes/lightmap_texel_size=0.2
+meshes/force_disable_compression=false
+skins/use_named_skins=true
+animation/import=true
+animation/fps=30
+animation/trimming=false
+animation/remove_immutable_tracks=true
+animation/import_rest_as_RESET=false
+import_script/path=""
+materials/extract=0
+materials/extract_format=0
+materials/extract_path=""
+_subresources={}
+gltf/naming_version=2
+gltf/embedded_image_handling=1

assets/props/chest.glb.import

@@ -0,0 +1,42 @@
+[remap]
+
+importer="scene"
+importer_version=1
+type="PackedScene"
+uid="uid://kik8lcd3jp7x"
+path="res://.godot/imported/chest.glb-22b4964b33afcd001921fbaa02f82b8a.scn"
+
+[deps]
+
+source_file="res://assets/props/chest.glb"
+dest_files=["res://.godot/imported/chest.glb-22b4964b33afcd001921fbaa02f82b8a.scn"]
+
+[params]
+
+nodes/root_type=""
+nodes/root_name=""
+nodes/root_script=null
+nodes/apply_root_scale=true
+nodes/root_scale=1.0
+nodes/import_as_skeleton_bones=false
+nodes/use_name_suffixes=true
+nodes/use_node_type_suffixes=true
+meshes/ensure_tangents=true
+meshes/generate_lods=true
+meshes/create_shadow_meshes=true
+meshes/light_baking=1
+meshes/lightmap_texel_size=0.2
+meshes/force_disable_compression=false
+skins/use_named_skins=true
+animation/import=true
+animation/fps=30
+animation/trimming=false
+animation/remove_immutable_tracks=true
+animation/import_rest_as_RESET=false
+import_script/path=""
+materials/extract=0
+materials/extract_format=0
+materials/extract_path=""
+_subresources={}
+gltf/naming_version=2
+gltf/embedded_image_handling=1

assets/props/crate_small.glb.import

@@ -0,0 +1,42 @@
+[remap]
+
+importer="scene"
+importer_version=1
+type="PackedScene"
+uid="uid://n18xbm0q3jai"
+path="res://.godot/imported/crate_small.glb-e6fdaf315193cd20d4514609adaa68f2.scn"
+
+[deps]
+
+source_file="res://assets/props/crate_small.glb"
+dest_files=["res://.godot/imported/crate_small.glb-e6fdaf315193cd20d4514609adaa68f2.scn"]
+
+[params]
+
+nodes/root_type=""
+nodes/root_name=""
+nodes/root_script=null
+nodes/apply_root_scale=true
+nodes/root_scale=1.0
+nodes/import_as_skeleton_bones=false
+nodes/use_name_suffixes=true
+nodes/use_node_type_suffixes=true
+meshes/ensure_tangents=true
+meshes/generate_lods=true
+meshes/create_shadow_meshes=true
+meshes/light_baking=1
+meshes/lightmap_texel_size=0.2
+meshes/force_disable_compression=false
+skins/use_named_skins=true
+animation/import=true
+animation/fps=30
+animation/trimming=false
+animation/remove_immutable_tracks=true
+animation/import_rest_as_RESET=false
+import_script/path=""
+materials/extract=0
+materials/extract_format=0
+materials/extract_path=""
+_subresources={}
+gltf/naming_version=2
+gltf/embedded_image_handling=1

assets/props/lamp_post_01.glb.import

@@ -0,0 +1,42 @@
+[remap]
+
+importer="scene"
+importer_version=1
+type="PackedScene"
+uid="uid://b3nfmxbm87pl3"
+path="res://.godot/imported/lamp_post_01.glb-eea7873c5c7bafcb4d19a09b9d97e53c.scn"
+
+[deps]
+
+source_file="res://assets/props/lamp_post_01.glb"
+dest_files=["res://.godot/imported/lamp_post_01.glb-eea7873c5c7bafcb4d19a09b9d97e53c.scn"]
+
+[params]
+
+nodes/root_type=""
+nodes/root_name=""
+nodes/root_script=null
+nodes/apply_root_scale=true
+nodes/root_scale=1.0
+nodes/import_as_skeleton_bones=false
+nodes/use_name_suffixes=true
+nodes/use_node_type_suffixes=true
+meshes/ensure_tangents=true
+meshes/generate_lods=true
+meshes/create_shadow_meshes=true
+meshes/light_baking=1
+meshes/lightmap_texel_size=0.2
+meshes/force_disable_compression=false
+skins/use_named_skins=true
+animation/import=true
+animation/fps=30
+animation/trimming=false
+animation/remove_immutable_tracks=true
+animation/import_rest_as_RESET=false
+import_script/path=""
+materials/extract=0
+materials/extract_format=0
+materials/extract_path=""
+_subresources={}
+gltf/naming_version=2
+gltf/embedded_image_handling=1

assets/props/rock_01.glb.import

@@ -0,0 +1,42 @@
+[remap]
+
+importer="scene"
+importer_version=1
+type="PackedScene"
+uid="uid://boi3fsj4ehqvb"
+path="res://.godot/imported/rock_01.glb-b0b73bccccfa933f3863bdc2afcb3246.scn"
+
+[deps]
+
+source_file="res://assets/props/rock_01.glb"
+dest_files=["res://.godot/imported/rock_01.glb-b0b73bccccfa933f3863bdc2afcb3246.scn"]
+
+[params]
+
+nodes/root_type=""
+nodes/root_name=""
+nodes/root_script=null
+nodes/apply_root_scale=true
+nodes/root_scale=1.0
+nodes/import_as_skeleton_bones=false
+nodes/use_name_suffixes=true
+nodes/use_node_type_suffixes=true
+meshes/ensure_tangents=true
+meshes/generate_lods=true
+meshes/create_shadow_meshes=true
+meshes/light_baking=1
+meshes/lightmap_texel_size=0.2
+meshes/force_disable_compression=false
+skins/use_named_skins=true
+animation/import=true
+animation/fps=30
+animation/trimming=false
+animation/remove_immutable_tracks=true
+animation/import_rest_as_RESET=false
+import_script/path=""
+materials/extract=0
+materials/extract_format=0
+materials/extract_path=""
+_subresources={}
+gltf/naming_version=2
+gltf/embedded_image_handling=1

assets/props/tree_pine_01.glb.import

@@ -0,0 +1,42 @@
+[remap]
+
+importer="scene"
+importer_version=1
+type="PackedScene"
+uid="uid://b84vjc1c3d650"
+path="res://.godot/imported/tree_pine_01.glb-519f726dc86fdb9eefd0928153fa0181.scn"
+
+[deps]
+
+source_file="res://assets/props/tree_pine_01.glb"
+dest_files=["res://.godot/imported/tree_pine_01.glb-519f726dc86fdb9eefd0928153fa0181.scn"]
+
+[params]
+
+nodes/root_type=""
+nodes/root_name=""
+nodes/root_script=null
+nodes/apply_root_scale=true
+nodes/root_scale=1.0
+nodes/import_as_skeleton_bones=false
+nodes/use_name_suffixes=true
+nodes/use_node_type_suffixes=true
+meshes/ensure_tangents=true
+meshes/generate_lods=true
+meshes/create_shadow_meshes=true
+meshes/light_baking=1
+meshes/lightmap_texel_size=0.2
+meshes/force_disable_compression=false
+skins/use_named_skins=true
+animation/import=true
+animation/fps=30
+animation/trimming=false
+animation/remove_immutable_tracks=true
+animation/import_rest_as_RESET=false
+import_script/path=""
+materials/extract=0
+materials/extract_format=0
+materials/extract_path=""
+_subresources={}
+gltf/naming_version=2
+gltf/embedded_image_handling=1

assets/scripting/behaviors/demo_chest.json

@@ -0,0 +1,17 @@
+{
+  "content_flags": {
+    "violence": "none",
+    "mature": false
+  },
+  "rules": [
+    {
+      "trigger": {"type": "on_interact"},
+      "conditions": [],
+      "actions": [
+        {"verb": "give_item", "item_id": "gold_coin", "count": 3},
+        {"verb": "play_sound", "sound_id": "chest_open"},
+        {"verb": "rotate", "target": "self", "degrees": 90, "axis": "y", "duration": 0.4}
+      ]
+    }
+  ]
+}

assets/scripting/spawn_catalog.json

@@ -0,0 +1,8 @@
+{
+  "templates": {
+    "small_crate": {
+      "asset_id": "props/crate_small.glb",
+      "display_name": "Small Crate"
+    }
+  }
+}

backend/alembic/env.py

@@ -8,7 +8,7 @@ from sqlalchemy.ext.asyncio import create_async_engine
 
 from app.config import settings
 from app.database import Base
-from app.models import user, session, world, asset  # noqa: F401
+from app.models import user, session, world, asset, avatar_loadout, world_content  # noqa: F401
 
 # this is the Alembic Config object, which provides
 # access to the values within the .ini file in use.

backend/alembic/versions/0004_add_avatar_loadouts_table.py

@@ -0,0 +1,39 @@
+"""add avatar_loadouts table
+
+Revision ID: 0004_add_avatar_loadouts_table
+Revises: 0003_add_refresh_tokens_table
+Create Date: 2026-09-05 00:00:00.000000
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision: str = "0004_add_avatar_loadouts_table"
+down_revision: Union[str, None] = "0003_add_refresh_tokens_table"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Create the avatar_loadouts table (one row per user)."""
+    op.create_table(
+        "avatar_loadouts",
+        sa.Column(
+            "user_id",
+            sa.Integer(),
+            sa.ForeignKey("users.id", ondelete="CASCADE"),
+            primary_key=True,
+        ),
+        sa.Column("data", postgresql.JSONB(), nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+    )
+
+
+def downgrade() -> None:
+    """Drop the avatar_loadouts table."""
+    op.drop_table("avatar_loadouts")

backend/alembic/versions/0005_add_world_content_tables.py

@@ -0,0 +1,120 @@
+"""add world_rooms, world_chunks, world_chunk_revisions tables
+
+Revision ID: 0005_add_world_content_tables
+Revises: 0004_add_avatar_loadouts_table
+Create Date: 2026-09-14 00:00:00.000000
+
+See docs/architecture/world_persistence_impl.md §4. Chunk content
+(rooms, chunk payloads, chunk revisions) lives in Postgres, purely
+additive to the existing ``worlds`` table.
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision: str = "0005_add_world_content_tables"
+down_revision: Union[str, None] = "0004_add_avatar_loadouts_table"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "world_rooms",
+        sa.Column("id", sa.Integer(), primary_key=True, index=True),
+        sa.Column(
+            "world_id", sa.Integer(),
+            sa.ForeignKey("worlds.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column("slug", sa.String(64), nullable=False),
+        sa.Column("name", sa.String(255), nullable=False),
+        sa.Column(
+            "grid", postgresql.JSONB(), nullable=False,
+            server_default='{"size": [32, 32, 1], "origin": [0, 0, 0]}',
+        ),
+        sa.Column("bounds", postgresql.JSONB(), nullable=True),
+        sa.Column("spawn", postgresql.JSONB(), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.Column(
+            "updated_at", sa.DateTime(timezone=True),
+            server_default=sa.func.now(), nullable=False,
+        ),
+        sa.UniqueConstraint("world_id", "slug", name="uq_world_rooms_world_slug"),
+    )
+    op.create_index("ix_world_rooms_world_id", "world_rooms", ["world_id"])
+
+    op.create_table(
+        "world_chunks",
+        sa.Column("id", sa.Integer(), primary_key=True, index=True),
+        sa.Column(
+            "world_id", sa.Integer(),
+            sa.ForeignKey("worlds.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column(
+            "room_id", sa.Integer(),
+            sa.ForeignKey("world_rooms.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column("chunk_key", sa.String(160), nullable=False, unique=True),
+        sa.Column("cx", sa.Integer(), nullable=False),
+        sa.Column("cy", sa.Integer(), nullable=False),
+        sa.Column("cz", sa.Integer(), nullable=False, server_default="0"),
+        sa.Column("format_version", sa.Integer(), nullable=False, server_default="1"),
+        sa.Column("payload", sa.LargeBinary(), nullable=False),
+        sa.Column("payload_len", sa.Integer(), nullable=False),
+        sa.Column("checksum", sa.String(64), nullable=False),
+        sa.Column("revision", sa.Integer(), nullable=False, server_default="1"),
+        sa.Column("content_flags", postgresql.JSONB(), nullable=False, server_default="{}"),
+        sa.Column("is_mature", sa.Boolean(), nullable=False, server_default="false"),
+        sa.Column(
+            "updated_by_id", sa.Integer(),
+            sa.ForeignKey("users.id", ondelete="SET NULL"),
+            nullable=True,
+        ),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.Column(
+            "updated_at", sa.DateTime(timezone=True),
+            server_default=sa.func.now(), nullable=False,
+        ),
+        sa.UniqueConstraint("room_id", "cx", "cy", "cz", name="uq_world_chunks_coord"),
+    )
+    op.create_index("ix_world_chunks_world_id", "world_chunks", ["world_id"])
+    op.create_index("ix_world_chunks_room_id", "world_chunks", ["room_id"])
+    op.create_index(
+        "ix_world_chunks_room_coord", "world_chunks", ["room_id", "cx", "cy", "cz"],
+    )
+    op.create_index(
+        "ix_world_chunks_mature", "world_chunks", ["world_id"],
+        postgresql_where=sa.text("is_mature"),
+    )
+
+    op.create_table(
+        "world_chunk_revisions",
+        sa.Column("id", sa.Integer(), primary_key=True, index=True),
+        sa.Column("chunk_key", sa.String(160), nullable=False),
+        sa.Column("world_id", sa.Integer(), nullable=False),
+        sa.Column("revision", sa.Integer(), nullable=False),
+        sa.Column("action", sa.String(16), nullable=False),
+        sa.Column(
+            "actor_id", sa.Integer(),
+            sa.ForeignKey("users.id", ondelete="SET NULL"),
+            nullable=True,
+        ),
+        sa.Column("checksum", sa.String(64), nullable=False),
+        sa.Column("payload", sa.LargeBinary(), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+    )
+    op.create_index("ix_world_chunk_revisions_chunk_key", "world_chunk_revisions", ["chunk_key"])
+    op.create_index("ix_world_chunk_revisions_world_id", "world_chunk_revisions", ["world_id"])
+    op.create_index("ix_world_chunk_revisions_created_at", "world_chunk_revisions", ["created_at"])
+
+
+def downgrade() -> None:
+    op.drop_table("world_chunk_revisions")
+    op.drop_table("world_chunks")
+    op.drop_table("world_rooms")

backend/alembic/versions/0006_add_presence_columns.py

@@ -0,0 +1,33 @@
+"""add presence columns to users
+
+Revision ID: 0006_add_presence_columns
+Revises: 0005_add_world_content_tables
+Create Date: 2026-09-14 00:00:00.000000
+
+Ported forward from the orphaned agent/dd2a126b57a1 branch (originally
+2a9b9873244a_add_presence_columns.py, down_revision 0001_initial) and
+rebased onto the current migration head. See app/services/presence.py /
+app/routers/presence.py.
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision: str = "0006_add_presence_columns"
+down_revision: Union[str, None] = "0005_add_world_content_tables"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Add last_seen_at and status_message columns to users table."""
+    op.add_column("users", sa.Column("last_seen_at", sa.DateTime(timezone=True), nullable=True))
+    op.add_column("users", sa.Column("status_message", sa.Text(), nullable=True))
+
+
+def downgrade() -> None:
+    """Remove presence columns from users table."""
+    op.drop_column("users", "status_message")
+    op.drop_column("users", "last_seen_at")

backend/alembic/versions/0007_add_social_graph_tables.py

@@ -0,0 +1,118 @@
+"""add social graph tables (friendships, follows, blocks)
+
+Revision ID: 0007_add_social_graph_tables
+Revises: 0006_add_presence_columns
+Create Date: 2026-09-15 00:00:00.000000
+
+docs/planning/social.md US-1 / app/models/social.py. Models + migration
+only -- the request/accept/block business logic lives in the sibling
+"Friends & follow API router" task.
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision: str = "0007_add_social_graph_tables"
+down_revision: Union[str, None] = "0006_add_presence_columns"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    friendship_status = postgresql.ENUM(
+        "pending", "accepted", name="friendship_status"
+    )
+    friendship_status.create(op.get_bind(), checkfirst=True)
+
+    op.create_table(
+        "friendships",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column(
+            "requester_id",
+            sa.Integer(),
+            sa.ForeignKey("users.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column(
+            "addressee_id",
+            sa.Integer(),
+            sa.ForeignKey("users.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column(
+            "status",
+            postgresql.ENUM(
+                "pending", "accepted", name="friendship_status", create_type=False
+            ),
+            nullable=False,
+            server_default="pending",
+        ),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.UniqueConstraint("requester_id", "addressee_id", name="uq_friendships_pair"),
+    )
+    op.create_index("ix_friendships_requester_id", "friendships", ["requester_id"])
+    op.create_index("ix_friendships_addressee_id", "friendships", ["addressee_id"])
+
+    op.create_table(
+        "follows",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column(
+            "follower_id",
+            sa.Integer(),
+            sa.ForeignKey("users.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column(
+            "followed_id",
+            sa.Integer(),
+            sa.ForeignKey("users.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.UniqueConstraint("follower_id", "followed_id", name="uq_follows_pair"),
+    )
+    op.create_index("ix_follows_follower_id", "follows", ["follower_id"])
+    op.create_index("ix_follows_followed_id", "follows", ["followed_id"])
+
+    op.create_table(
+        "blocks",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column(
+            "blocker_id",
+            sa.Integer(),
+            sa.ForeignKey("users.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column(
+            "blocked_id",
+            sa.Integer(),
+            sa.ForeignKey("users.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.UniqueConstraint("blocker_id", "blocked_id", name="uq_blocks_pair"),
+    )
+    op.create_index("ix_blocks_blocker_id", "blocks", ["blocker_id"])
+    op.create_index("ix_blocks_blocked_id", "blocks", ["blocked_id"])
+
+
+def downgrade() -> None:
+    op.drop_index("ix_blocks_blocked_id", table_name="blocks")
+    op.drop_index("ix_blocks_blocker_id", table_name="blocks")
+    op.drop_table("blocks")
+
+    op.drop_index("ix_follows_followed_id", table_name="follows")
+    op.drop_index("ix_follows_follower_id", table_name="follows")
+    op.drop_table("follows")
+
+    op.drop_index("ix_friendships_addressee_id", table_name="friendships")
+    op.drop_index("ix_friendships_requester_id", table_name="friendships")
+    op.drop_table("friendships")
+
+    postgresql.ENUM(name="friendship_status").drop(op.get_bind(), checkfirst=True)

backend/alembic/versions/0008_add_chat_tables.py

@@ -0,0 +1,178 @@
+"""add chat tables (conversations, messages, message_reports)
+
+Revision ID: 0008_add_chat_tables
+Revises: 0007_add_social_graph_tables
+Create Date: 2026-09-15 00:00:00.000000
+
+docs/planning/social.md US-4 / app/models/chat.py. Models + migration only
+-- text filtering, rate limiting, and send/report/moderation endpoints live
+in sibling tasks that depend on this one.
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision: str = "0008_add_chat_tables"
+down_revision: Union[str, None] = "0007_add_social_graph_tables"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    message_report_status = postgresql.ENUM(
+        "open", "resolved", "dismissed", name="message_report_status"
+    )
+    message_report_status.create(op.get_bind(), checkfirst=True)
+
+    op.create_table(
+        "conversations",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column(
+            "user_a_id",
+            sa.Integer(),
+            sa.ForeignKey("users.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column(
+            "user_b_id",
+            sa.Integer(),
+            sa.ForeignKey("users.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.UniqueConstraint("user_a_id", "user_b_id", name="uq_conversations_pair"),
+        sa.CheckConstraint("user_a_id < user_b_id", name="ck_conversations_ordered_pair"),
+    )
+    op.create_index("ix_conversations_user_a_id", "conversations", ["user_a_id"])
+    op.create_index("ix_conversations_user_b_id", "conversations", ["user_b_id"])
+
+    op.create_table(
+        "conversation_participants",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column(
+            "conversation_id",
+            sa.Integer(),
+            sa.ForeignKey("conversations.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column(
+            "user_id",
+            sa.Integer(),
+            sa.ForeignKey("users.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.UniqueConstraint(
+            "conversation_id", "user_id", name="uq_conversation_participants_pair"
+        ),
+    )
+    op.create_index(
+        "ix_conversation_participants_conversation_id",
+        "conversation_participants",
+        ["conversation_id"],
+    )
+    op.create_index(
+        "ix_conversation_participants_user_id", "conversation_participants", ["user_id"]
+    )
+
+    op.create_table(
+        "messages",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column(
+            "sender_id",
+            sa.Integer(),
+            sa.ForeignKey("users.id", ondelete="SET NULL"),
+            nullable=True,
+        ),
+        sa.Column(
+            "conversation_id",
+            sa.Integer(),
+            sa.ForeignKey("conversations.id", ondelete="CASCADE"),
+            nullable=True,
+        ),
+        sa.Column(
+            "world_id",
+            sa.Integer(),
+            sa.ForeignKey("worlds.id", ondelete="CASCADE"),
+            nullable=True,
+        ),
+        sa.Column(
+            "room_id",
+            sa.Integer(),
+            sa.ForeignKey("world_rooms.id", ondelete="CASCADE"),
+            nullable=True,
+        ),
+        sa.Column("body", sa.Text(), nullable=False),
+        sa.Column("filtered", sa.Boolean(), nullable=False, server_default="false"),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+    )
+    op.create_index("ix_messages_sender_id", "messages", ["sender_id"])
+    op.create_index(
+        "ix_messages_conversation_created", "messages", ["conversation_id", "created_at"]
+    )
+    op.create_index("ix_messages_world_created", "messages", ["world_id", "created_at"])
+
+    op.create_table(
+        "message_reports",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column(
+            "message_id",
+            sa.Integer(),
+            sa.ForeignKey("messages.id", ondelete="SET NULL"),
+            nullable=True,
+        ),
+        sa.Column(
+            "reporter_id",
+            sa.Integer(),
+            sa.ForeignKey("users.id", ondelete="SET NULL"),
+            nullable=True,
+        ),
+        sa.Column("reason", sa.Text(), nullable=False),
+        sa.Column(
+            "status",
+            postgresql.ENUM(
+                "open", "resolved", "dismissed", name="message_report_status", create_type=False
+            ),
+            nullable=False,
+            server_default="open",
+        ),
+        sa.Column(
+            "moderator_id",
+            sa.Integer(),
+            sa.ForeignKey("users.id", ondelete="SET NULL"),
+            nullable=True,
+        ),
+        sa.Column("resolved_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+    )
+    op.create_index("ix_message_reports_message_id", "message_reports", ["message_id"])
+    op.create_index("ix_message_reports_reporter_id", "message_reports", ["reporter_id"])
+    op.create_index("ix_message_reports_moderator_id", "message_reports", ["moderator_id"])
+
+
+def downgrade() -> None:
+    op.drop_index("ix_message_reports_moderator_id", table_name="message_reports")
+    op.drop_index("ix_message_reports_reporter_id", table_name="message_reports")
+    op.drop_index("ix_message_reports_message_id", table_name="message_reports")
+    op.drop_table("message_reports")
+
+    op.drop_index("ix_messages_world_created", table_name="messages")
+    op.drop_index("ix_messages_conversation_created", table_name="messages")
+    op.drop_index("ix_messages_sender_id", table_name="messages")
+    op.drop_table("messages")
+
+    op.drop_index("ix_conversation_participants_user_id", table_name="conversation_participants")
+    op.drop_index(
+        "ix_conversation_participants_conversation_id", table_name="conversation_participants"
+    )
+    op.drop_table("conversation_participants")
+
+    op.drop_index("ix_conversations_user_b_id", table_name="conversations")
+    op.drop_index("ix_conversations_user_a_id", table_name="conversations")
+    op.drop_table("conversations")
+
+    postgresql.ENUM(name="message_report_status").drop(op.get_bind(), checkfirst=True)

backend/alembic/versions/0009_add_group_tables.py

@@ -0,0 +1,80 @@
+"""add group tables (groups, group_members)
+
+Revision ID: 0009_add_group_tables
+Revises: 0008_add_chat_tables
+Create Date: 2026-09-15 00:00:00.000000
+
+docs/planning/social.md US-5 / app/models/groups.py. Models + migration only
+-- create/join/leave, role authorization, and the group page endpoint live
+in a sibling task ("Groups API") that depends on this one.
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision: str = "0009_add_group_tables"
+down_revision: Union[str, None] = "0008_add_chat_tables"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    group_role = postgresql.ENUM("owner", "admin", "member", name="group_role")
+    group_role.create(op.get_bind(), checkfirst=True)
+
+    op.create_table(
+        "groups",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column("name", sa.String(length=100), nullable=False),
+        sa.Column("description", sa.Text(), nullable=True),
+        sa.Column(
+            "owner_id",
+            sa.Integer(),
+            sa.ForeignKey("users.id", ondelete="SET NULL"),
+            nullable=True,
+        ),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+    )
+    op.create_index("ix_groups_owner_id", "groups", ["owner_id"])
+
+    op.create_table(
+        "group_members",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column(
+            "group_id",
+            sa.Integer(),
+            sa.ForeignKey("groups.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column(
+            "user_id",
+            sa.Integer(),
+            sa.ForeignKey("users.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column(
+            "role",
+            postgresql.ENUM("owner", "admin", "member", name="group_role", create_type=False),
+            nullable=False,
+            server_default="member",
+        ),
+        sa.Column("joined_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.UniqueConstraint("group_id", "user_id", name="uq_group_members_pair"),
+    )
+    op.create_index("ix_group_members_group_id", "group_members", ["group_id"])
+    op.create_index("ix_group_members_user_id", "group_members", ["user_id"])
+
+
+def downgrade() -> None:
+    op.drop_index("ix_group_members_user_id", table_name="group_members")
+    op.drop_index("ix_group_members_group_id", table_name="group_members")
+    op.drop_table("group_members")
+
+    op.drop_index("ix_groups_owner_id", table_name="groups")
+    op.drop_table("groups")
+
+    postgresql.ENUM(name="group_role").drop(op.get_bind(), checkfirst=True)

backend/alembic/versions/0010_add_profile_tables.py

@@ -0,0 +1,65 @@
+"""add profile tables (profiles, profile_favorites)
+
+Revision ID: 0010_add_profile_tables
+Revises: 0009_add_group_tables
+Create Date: 2026-09-15 00:00:00.000000
+
+app/models/profile.py. Models + migration + owner-only /api/profile/me
+endpoints only -- the public profile view endpoint (GET /api/profile/{user_id})
+belongs to a sibling task that depends on this one.
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision: str = "0010_add_profile_tables"
+down_revision: Union[str, None] = "0009_add_group_tables"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "profiles",
+        sa.Column("user_id", sa.Integer(), sa.ForeignKey("users.id", ondelete="CASCADE"), primary_key=True),
+        sa.Column(
+            "avatar_asset_id",
+            sa.Integer(),
+            sa.ForeignKey("assets.id", ondelete="SET NULL"),
+            nullable=True,
+        ),
+        sa.Column("bio", sa.Text(), nullable=True),
+        sa.Column("privacy_json", postgresql.JSONB(), nullable=False, server_default="{}"),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+    )
+    op.create_index("ix_profiles_avatar_asset_id", "profiles", ["avatar_asset_id"])
+
+    op.create_table(
+        "profile_favorites",
+        sa.Column(
+            "user_id",
+            sa.Integer(),
+            sa.ForeignKey("users.id", ondelete="CASCADE"),
+            primary_key=True,
+        ),
+        sa.Column(
+            "world_id",
+            sa.Integer(),
+            sa.ForeignKey("worlds.id", ondelete="CASCADE"),
+            primary_key=True,
+        ),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
+    )
+    op.create_index("ix_profile_favorites_world_id", "profile_favorites", ["world_id"])
+
+
+def downgrade() -> None:
+    op.drop_index("ix_profile_favorites_world_id", table_name="profile_favorites")
+    op.drop_table("profile_favorites")
+
+    op.drop_index("ix_profiles_avatar_asset_id", table_name="profiles")
+    op.drop_table("profiles")

backend/alembic/versions/0011_add_dm_last_read.py

@@ -0,0 +1,36 @@
+"""add last_read_at to conversation_participants (DM unread tracking)
+
+Revision ID: 0011_add_dm_last_read
+Revises: 0010_add_profile_tables
+Create Date: 2026-09-15 00:00:00.000000
+
+app/routers/chat_dm.py (DM send/list/conversations endpoints). Unread-count
+tracking is implemented as a last-read timestamp per participant: whenever a
+user fetches a conversation's message history, their
+``conversation_participants`` row's ``last_read_at`` is bumped to "now", and
+the conversation-list endpoint counts messages with
+``created_at > last_read_at`` (or all messages if never read) as unread for
+that participant. Nullable/no default so existing rows (none yet in
+practice, but consistent with "never read") read as "everything unread".
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision: str = "0011_add_dm_last_read"
+down_revision: Union[str, None] = "0010_add_profile_tables"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "conversation_participants",
+        sa.Column("last_read_at", sa.DateTime(timezone=True), nullable=True),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("conversation_participants", "last_read_at")

backend/alembic/versions/0012_add_wallet_and_transactions.py

@@ -0,0 +1,90 @@
+"""add wallets and transactions ledger tables
+
+Revision ID: 0012_add_wallet_and_transactions
+Revises: 0011_add_dm_last_read
+Create Date: 2026-09-15 00:00:00.000000
+
+docs/planning/economy.md US-1 (task 8343bc0a730f).
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision: str = "0012_add_wallet_and_transactions"
+down_revision: Union[str, None] = "0011_add_dm_last_read"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+TRANSACTION_TYPES = (
+    "credit_purchase",
+    "marketplace_purchase",
+    "marketplace_sale",
+    "escrow_release",
+    "payout",
+    "refund",
+    "admin_adjustment",
+)
+
+
+def upgrade() -> None:
+    # 1. Create transaction_type enum for Postgres
+    bind = op.get_bind()
+    if bind.dialect.name == "postgresql":
+        tx_type_enum = postgresql.ENUM(*TRANSACTION_TYPES, name="transaction_type", create_type=False)
+        tx_type_enum.create(bind, checkfirst=True)
+        tx_type_col = postgresql.ENUM(*TRANSACTION_TYPES, name="transaction_type", create_type=False)
+    else:
+        tx_type_col = sa.Enum(*TRANSACTION_TYPES, name="transaction_type")
+
+    # 2. Create wallets table
+    op.create_table(
+        "wallets",
+        sa.Column("id", sa.BigInteger(), autoincrement=True, nullable=False),
+        sa.Column("user_id", sa.Integer(), nullable=False),
+        sa.Column("balance", sa.BigInteger(), server_default="0", nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.text("now()"), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.text("now()"), nullable=False),
+        sa.CheckConstraint("balance >= 0", name="check_wallet_balance_non_negative"),
+        sa.ForeignKeyConstraint(["user_id"], ["users.id"], ondelete="CASCADE"),
+        sa.PrimaryKeyConstraint("id"),
+        sa.UniqueConstraint("user_id", name="uq_wallets_user_id"),
+    )
+    op.create_index(op.f("ix_wallets_user_id"), "wallets", ["user_id"], unique=True)
+
+    # 3. Create transactions table
+    op.create_table(
+        "transactions",
+        sa.Column("id", sa.BigInteger(), autoincrement=True, nullable=False),
+        sa.Column("wallet_id", sa.BigInteger(), nullable=False),
+        sa.Column("type", tx_type_col, nullable=False),
+        sa.Column("amount", sa.BigInteger(), nullable=False),
+        sa.Column("balance_after", sa.BigInteger(), nullable=False),
+        sa.Column("reference_type", sa.String(), nullable=True),
+        sa.Column("reference_id", sa.String(), nullable=True),
+        sa.Column("idempotency_key", sa.String(), nullable=True),
+        sa.Column("metadata_json", postgresql.JSONB(astext_type=sa.Text()) if bind.dialect.name == "postgresql" else sa.JSON(), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.text("now()"), nullable=False),
+        sa.ForeignKeyConstraint(["wallet_id"], ["wallets.id"], ondelete="CASCADE"),
+        sa.PrimaryKeyConstraint("id"),
+        sa.UniqueConstraint("idempotency_key", name="uq_transactions_idempotency_key"),
+    )
+    op.create_index(op.f("ix_transactions_wallet_id"), "transactions", ["wallet_id"], unique=False)
+    op.create_index(op.f("ix_transactions_idempotency_key"), "transactions", ["idempotency_key"], unique=True)
+    op.create_index(op.f("ix_transactions_created_at"), "transactions", ["created_at"], unique=False)
+
+
+def downgrade() -> None:
+    op.drop_index(op.f("ix_transactions_created_at"), table_name="transactions")
+    op.drop_index(op.f("ix_transactions_idempotency_key"), table_name="transactions")
+    op.drop_index(op.f("ix_transactions_wallet_id"), table_name="transactions")
+    op.drop_table("transactions")
+
+    op.drop_index(op.f("ix_wallets_user_id"), table_name="wallets")
+    op.drop_table("wallets")
+
+    bind = op.get_bind()
+    if bind.dialect.name == "postgresql":
+        sa.Enum(*TRANSACTION_TYPES, name="transaction_type").drop(bind, checkfirst=True)

backend/alembic/versions/0013_add_marketplace_tables.py

@@ -0,0 +1,146 @@
+"""add marketplace tables: catalog_items, marketplace_listings, purchases, creator_balances
+
+Revision ID: 0013_add_marketplace_tables
+Revises: 0012_add_wallet_and_transactions
+Create Date: 2026-09-15 00:00:00.000000
+
+docs/planning/economy.md US-3, US-4 (task 166836d55365).
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision: str = "0013_add_marketplace_tables"
+down_revision: Union[str, None] = "0012_add_wallet_and_transactions"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+ITEM_TYPES = ("asset", "avatar_item", "experience_pass")
+LISTING_STATUSES = ("active", "sold", "delisted", "removed_by_moderation")
+PURCHASE_STATUSES = ("pending_escrow", "completed", "refunded", "reversed")
+
+
+def upgrade() -> None:
+    bind = op.get_bind()
+    is_pg = bind.dialect.name == "postgresql"
+
+    # Enums
+    if is_pg:
+        item_type_enum = postgresql.ENUM(*ITEM_TYPES, name="catalog_item_type", create_type=False)
+        item_type_enum.create(bind, checkfirst=True)
+        item_type_col = postgresql.ENUM(*ITEM_TYPES, name="catalog_item_type", create_type=False)
+
+        listing_status_enum = postgresql.ENUM(*LISTING_STATUSES, name="marketplace_listing_status", create_type=False)
+        listing_status_enum.create(bind, checkfirst=True)
+        listing_status_col = postgresql.ENUM(*LISTING_STATUSES, name="marketplace_listing_status", create_type=False)
+
+        purchase_status_enum = postgresql.ENUM(*PURCHASE_STATUSES, name="purchase_status", create_type=False)
+        purchase_status_enum.create(bind, checkfirst=True)
+        purchase_status_col = postgresql.ENUM(*PURCHASE_STATUSES, name="purchase_status", create_type=False)
+    else:
+        item_type_col = sa.Enum(*ITEM_TYPES, name="catalog_item_type")
+        listing_status_col = sa.Enum(*LISTING_STATUSES, name="marketplace_listing_status")
+        purchase_status_col = sa.Enum(*PURCHASE_STATUSES, name="purchase_status")
+
+    # 1. catalog_items
+    op.create_table(
+        "catalog_items",
+        sa.Column("id", sa.BigInteger(), autoincrement=True, nullable=False),
+        sa.Column("owner_id", sa.Integer(), nullable=False),
+        sa.Column("asset_id", sa.Integer(), nullable=True),
+        sa.Column("item_type", item_type_col, nullable=False),
+        sa.Column("name", sa.String(length=100), nullable=False),
+        sa.Column("description", sa.String(length=2000), nullable=True),
+        sa.Column("metadata_json", postgresql.JSONB(astext_type=sa.Text()) if is_pg else sa.JSON(), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.text("now()"), nullable=False),
+        sa.ForeignKeyConstraint(["owner_id"], ["users.id"], ondelete="CASCADE"),
+        sa.ForeignKeyConstraint(["asset_id"], ["assets.id"], ondelete="SET NULL"),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index(op.f("ix_catalog_items_owner_id"), "catalog_items", ["owner_id"], unique=False)
+    op.create_index(op.f("ix_catalog_items_asset_id"), "catalog_items", ["asset_id"], unique=False)
+
+    # 2. marketplace_listings
+    op.create_table(
+        "marketplace_listings",
+        sa.Column("id", sa.BigInteger(), autoincrement=True, nullable=False),
+        sa.Column("catalog_item_id", sa.BigInteger(), nullable=False),
+        sa.Column("seller_id", sa.Integer(), nullable=False),
+        sa.Column("price", sa.BigInteger(), nullable=False),
+        sa.Column("status", listing_status_col, server_default="active", nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.text("now()"), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.text("now()"), nullable=False),
+        sa.CheckConstraint("price > 0", name="check_listing_price_positive"),
+        sa.ForeignKeyConstraint(["catalog_item_id"], ["catalog_items.id"], ondelete="CASCADE"),
+        sa.ForeignKeyConstraint(["seller_id"], ["users.id"], ondelete="CASCADE"),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index(op.f("ix_marketplace_listings_catalog_item_id"), "marketplace_listings", ["catalog_item_id"], unique=False)
+    op.create_index(op.f("ix_marketplace_listings_seller_id"), "marketplace_listings", ["seller_id"], unique=False)
+
+    # 3. purchases
+    op.create_table(
+        "purchases",
+        sa.Column("id", sa.BigInteger(), autoincrement=True, nullable=False),
+        sa.Column("listing_id", sa.BigInteger(), nullable=True),
+        sa.Column("buyer_id", sa.Integer(), nullable=False),
+        sa.Column("seller_id", sa.Integer(), nullable=False),
+        sa.Column("price", sa.BigInteger(), nullable=False),
+        sa.Column("platform_fee", sa.BigInteger(), nullable=False),
+        sa.Column("seller_net", sa.BigInteger(), nullable=False),
+        sa.Column("status", purchase_status_col, server_default="pending_escrow", nullable=False),
+        sa.Column("escrow_hold_until", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.text("now()"), nullable=False),
+        sa.ForeignKeyConstraint(["listing_id"], ["marketplace_listings.id"], ondelete="SET NULL"),
+        sa.ForeignKeyConstraint(["buyer_id"], ["users.id"], ondelete="CASCADE"),
+        sa.ForeignKeyConstraint(["seller_id"], ["users.id"], ondelete="CASCADE"),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index(op.f("ix_purchases_listing_id"), "purchases", ["listing_id"], unique=False)
+    op.create_index(op.f("ix_purchases_buyer_id"), "purchases", ["buyer_id"], unique=False)
+    op.create_index(op.f("ix_purchases_seller_id"), "purchases", ["seller_id"], unique=False)
+
+    # 4. creator_balances
+    op.create_table(
+        "creator_balances",
+        sa.Column("id", sa.BigInteger(), autoincrement=True, nullable=False),
+        sa.Column("user_id", sa.Integer(), nullable=False),
+        sa.Column("available", sa.BigInteger(), server_default="0", nullable=False),
+        sa.Column("pending", sa.BigInteger(), server_default="0", nullable=False),
+        sa.Column("lifetime_earned", sa.BigInteger(), server_default="0", nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.text("now()"), nullable=False),
+        sa.CheckConstraint("available >= 0", name="check_creator_available_non_negative"),
+        sa.CheckConstraint("pending >= 0", name="check_creator_pending_non_negative"),
+        sa.CheckConstraint("lifetime_earned >= 0", name="check_creator_lifetime_non_negative"),
+        sa.ForeignKeyConstraint(["user_id"], ["users.id"], ondelete="CASCADE"),
+        sa.PrimaryKeyConstraint("id"),
+        sa.UniqueConstraint("user_id", name="uq_creator_balances_user_id"),
+    )
+    op.create_index(op.f("ix_creator_balances_user_id"), "creator_balances", ["user_id"], unique=True)
+
+
+def downgrade() -> None:
+    op.drop_index(op.f("ix_creator_balances_user_id"), table_name="creator_balances")
+    op.drop_table("creator_balances")
+
+    op.drop_index(op.f("ix_purchases_seller_id"), table_name="purchases")
+    op.drop_index(op.f("ix_purchases_buyer_id"), table_name="purchases")
+    op.drop_index(op.f("ix_purchases_listing_id"), table_name="purchases")
+    op.drop_table("purchases")
+
+    op.drop_index(op.f("ix_marketplace_listings_seller_id"), table_name="marketplace_listings")
+    op.drop_index(op.f("ix_marketplace_listings_catalog_item_id"), table_name="marketplace_listings")
+    op.drop_table("marketplace_listings")
+
+    op.drop_index(op.f("ix_catalog_items_asset_id"), table_name="catalog_items")
+    op.drop_index(op.f("ix_catalog_items_owner_id"), table_name="catalog_items")
+    op.drop_table("catalog_items")
+
+    bind = op.get_bind()
+    if bind.dialect.name == "postgresql":
+        sa.Enum(*PURCHASE_STATUSES, name="purchase_status").drop(bind, checkfirst=True)
+        sa.Enum(*LISTING_STATUSES, name="marketplace_listing_status").drop(bind, checkfirst=True)
+        sa.Enum(*ITEM_TYPES, name="catalog_item_type").drop(bind, checkfirst=True)

backend/alembic/versions/0014_add_payout_requests.py

@@ -0,0 +1,68 @@
+"""add payout_requests table and payout_status enum
+
+Revision ID: 0014_add_payout_requests
+Revises: 0013_add_marketplace_tables
+Create Date: 2026-09-15 00:00:00.000000
+
+docs/planning/economy.md US-5 (task f5b4684f2e65).
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision: str = "0014_add_payout_requests"
+down_revision: Union[str, None] = "0013_add_marketplace_tables"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+PAYOUT_STATUSES = ("pending", "approved", "paid", "rejected")
+
+
+def upgrade() -> None:
+    bind = op.get_bind()
+    is_pg = bind.dialect.name == "postgresql"
+
+    if is_pg:
+        payout_status_enum = postgresql.ENUM(*PAYOUT_STATUSES, name="payout_status", create_type=False)
+        payout_status_enum.create(bind, checkfirst=True)
+        payout_status_col = postgresql.ENUM(*PAYOUT_STATUSES, name="payout_status", create_type=False)
+    else:
+        payout_status_col = sa.Enum(*PAYOUT_STATUSES, name="payout_status")
+
+    op.create_table(
+        "payout_requests",
+        sa.Column("id", sa.BigInteger(), autoincrement=True, nullable=False),
+        sa.Column("creator_id", sa.Integer(), nullable=False),
+        sa.Column("amount", sa.BigInteger(), nullable=False),
+        sa.Column("status", payout_status_col, server_default="pending", nullable=False),
+        sa.Column("external_ref", sa.String(length=255), nullable=True),
+        sa.Column("provider_ref", sa.String(length=255), nullable=True),
+        sa.Column("requested_by", sa.Integer(), nullable=False),
+        sa.Column("reviewed_by", sa.Integer(), nullable=True),
+        sa.Column("reviewed_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.text("now()"), nullable=False),
+        sa.ForeignKeyConstraint(["creator_id"], ["users.id"], ondelete="CASCADE"),
+        sa.ForeignKeyConstraint(["requested_by"], ["users.id"], ondelete="CASCADE"),
+        sa.ForeignKeyConstraint(["reviewed_by"], ["users.id"], ondelete="SET NULL"),
+        sa.CheckConstraint("amount > 0", name="check_payout_amount_positive"),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index("ix_payout_requests_creator_id", "payout_requests", ["creator_id"], unique=False)
+    op.create_index("ix_payout_requests_requested_by", "payout_requests", ["requested_by"], unique=False)
+    op.create_index("ix_payout_requests_reviewed_by", "payout_requests", ["reviewed_by"], unique=False)
+
+
+def downgrade() -> None:
+    bind = op.get_bind()
+    is_pg = bind.dialect.name == "postgresql"
+
+    op.drop_index("ix_payout_requests_reviewed_by", table_name="payout_requests")
+    op.drop_index("ix_payout_requests_requested_by", table_name="payout_requests")
+    op.drop_index("ix_payout_requests_creator_id", table_name="payout_requests")
+    op.drop_table("payout_requests")
+
+    if is_pg:
+        op.execute("DROP TYPE IF EXISTS payout_status")

backend/alembic/versions/0015_add_discovery_metadata.py

@@ -0,0 +1,62 @@
+"""add discovery metadata to worlds and create world_visits table
+
+Revision ID: 0015_add_discovery_metadata
+Revises: 0014_add_payout_requests
+Create Date: 2026-09-15 00:00:00.000000
+
+docs/planning/discovery.md (task b377353b8167).
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision: str = "0015_add_discovery_metadata"
+down_revision: Union[str, None] = "0014_add_payout_requests"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # 1. Add discovery metadata columns to worlds table
+    op.add_column("worlds", sa.Column("category", sa.String(length=100), nullable=True))
+    op.add_column("worlds", sa.Column("tags", postgresql.ARRAY(sa.String()), server_default="{}", nullable=True))
+    op.add_column("worlds", sa.Column("play_count", sa.Integer(), server_default="0", nullable=False))
+    op.add_column("worlds", sa.Column("last_played_at", sa.DateTime(timezone=True), nullable=True))
+
+    op.create_index("ix_worlds_category", "worlds", ["category"], unique=False)
+    op.create_index("ix_worlds_tags", "worlds", ["tags"], unique=False, postgresql_using="gin")
+
+    # 2. Create world_visits table
+    op.create_table(
+        "world_visits",
+        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column("world_id", sa.Integer(), nullable=False),
+        sa.Column("user_id", sa.Integer(), nullable=True),
+        sa.Column("anonymous_token", sa.String(length=255), nullable=True),
+        sa.Column("visited_at", sa.DateTime(timezone=True), server_default=sa.text("now()"), nullable=False),
+        sa.ForeignKeyConstraint(["world_id"], ["worlds.id"], ondelete="CASCADE"),
+        sa.ForeignKeyConstraint(["user_id"], ["users.id"], ondelete="SET NULL"),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index("ix_world_visits_world_id", "world_visits", ["world_id"], unique=False)
+    op.create_index("ix_world_visits_user_id", "world_visits", ["user_id"], unique=False)
+    op.create_index("ix_world_visits_visited_at", "world_visits", ["visited_at"], unique=False)
+    op.create_index("ix_world_visits_world_visited_at", "world_visits", ["world_id", "visited_at"], unique=False)
+
+
+def downgrade() -> None:
+    op.drop_index("ix_world_visits_world_visited_at", table_name="world_visits")
+    op.drop_index("ix_world_visits_visited_at", table_name="world_visits")
+    op.drop_index("ix_world_visits_user_id", table_name="world_visits")
+    op.drop_index("ix_world_visits_world_id", table_name="world_visits")
+    op.drop_table("world_visits")
+
+    op.drop_index("ix_worlds_tags", table_name="worlds", postgresql_using="gin")
+    op.drop_index("ix_worlds_category", table_name="worlds")
+    op.drop_column("worlds", "last_played_at")
+    op.drop_column("worlds", "play_count")
+    op.drop_column("worlds", "tags")
+    op.drop_column("worlds", "category")

backend/alembic/versions/0016_content_guidelines.py

@@ -0,0 +1,30 @@
+"""add content_guidelines column to worlds table
+
+Revision ID: 0016_content_guidelines
+Revises: 0015_add_discovery_metadata
+Create Date: 2026-09-17 00:00:00.000000
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision: str = "0016_content_guidelines"
+down_revision: Union[str, None] = "0015_add_discovery_metadata"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # Check if column already exists (in case partial run added column before version update failed)
+    bind = op.get_bind()
+    insp = sa.inspect(bind)
+    cols = [c["name"] for c in insp.get_columns("worlds")]
+    if "content_guidelines" not in cols:
+        op.add_column("worlds", sa.Column("content_guidelines", sa.Text(), nullable=True))
+
+
+def downgrade() -> None:
+    op.drop_column("worlds", "content_guidelines")

backend/alembic/versions/0017_add_asset_collections.py

@@ -0,0 +1,53 @@
+"""add asset_collections and collection_assets tables
+
+Revision ID: 0017_add_asset_collections
+Revises: 0016_content_guidelines
+Create Date: 2026-09-22 00:00:00.000000
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision: str = "0017_add_asset_collections"
+down_revision: Union[str, None] = "0016_content_guidelines"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    bind = op.get_bind()
+    insp = sa.inspect(bind)
+    tables = insp.get_table_names()
+
+    if "asset_collections" not in tables:
+        op.create_table(
+            "asset_collections",
+            sa.Column("id", sa.Integer(), primary_key=True, index=True),
+            sa.Column("title", sa.String(length=255), nullable=False, index=True),
+            sa.Column("description", sa.Text(), nullable=True),
+            sa.Column("theme", sa.String(length=64), nullable=False, server_default="general", index=True),
+            sa.Column("thumbnail_url", sa.String(length=512), nullable=True),
+            sa.Column("owner_id", sa.Integer(), sa.ForeignKey("users.id", ondelete="CASCADE"), nullable=False),
+            sa.Column("is_public", sa.Boolean(), nullable=False, server_default=sa.text("true"), index=True),
+            sa.Column("tags", sa.String(length=512), nullable=True),
+            sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
+            sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
+        )
+
+    if "collection_assets" not in tables:
+        op.create_table(
+            "collection_assets",
+            sa.Column("id", sa.Integer(), primary_key=True, index=True),
+            sa.Column("collection_id", sa.Integer(), sa.ForeignKey("asset_collections.id", ondelete="CASCADE"), nullable=False, index=True),
+            sa.Column("asset_id", sa.Integer(), sa.ForeignKey("assets.id", ondelete="CASCADE"), nullable=False, index=True),
+            sa.Column("sort_order", sa.Integer(), nullable=False, server_default="0"),
+            sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
+        )
+
+
+def downgrade() -> None:
+    op.drop_table("collection_assets")
+    op.drop_table("asset_collections")

backend/app/config.py

@@ -75,11 +75,52 @@ class Settings(BaseSettings):
     # CORS
     CORS_ORIGINS: str = "http://localhost:8080,http://localhost:3000"
 
+    # Per-IP auth rate limiting (app/rate_limit.py). Disabled by the
+    # checkpoint smoke suite, which runs every test from one client IP.
+    RATE_LIMIT_ENABLED: bool = True
+
     # File uploads
     UPLOAD_DIR: str = "uploads"
     MAX_UPLOAD_SIZE_MB: int = 100
     GLTF_MAX_FILE_SIZE_MB: int = 200
 
+    # ── Game-server orchestration ──────────────────────────────────────────
+    # The join flow (POST /api/worlds/{id}/join) ensures a headless Godot
+    # dedicated-server process exists for a world and returns its address.
+    # Disabled by default so nothing tries to spawn Godot in environments
+    # that don't have it (plain pytest, CI without the engine); the
+    # checkpoint/playtest launcher turns it on.
+    GAME_SERVERS_ENABLED: bool = False
+    # Path to the Godot 4 binary. "godot" resolves via PATH.
+    GODOT_BIN: str = str(Path.home() / "godot" / "godot")
+    # Godot project directory (the game repo root -- backend/ is a subdir).
+    GAME_PROJECT_DIR: str = str(Path(__file__).resolve().parents[2])
+    # The host clients should connect to for ENet. Defaults to the LAN IP the
+    # launcher bakes into the exe; overridable for local testing.
+    GAME_SERVER_HOST: str = "127.0.0.1"
+    # Port range for per-world dedicated servers.
+    GAME_SERVER_PORT_MIN: int = 27000
+    GAME_SERVER_PORT_MAX: int = 27099
+    # Kill a world's server this long after its last join with no active
+    # players reported.
+    GAME_SERVER_IDLE_TIMEOUT_SECONDS: int = 300
+    # How long ensure_server() waits for a spawned server to report
+    # "ready": true in its status file before giving up (503 to the
+    # joining client). See world_persistence_impl.md §7.4 -- content
+    # loading makes a slow start more likely than the old bare-port-bind
+    # wait, so this is a separate, longer-by-default budget.
+    GAME_SERVER_READY_TIMEOUT_SECONDS: float = 20.0
+    # The base URL the dedicated Godot server should call back into this
+    # backend on, for the read-only /api/internal content routes
+    # (world_persistence_impl.md §4.4 / §7).
+    GAME_SERVER_INTERNAL_API_URL: str = "http://127.0.0.1:8000"
+
+    # ── World content persistence (world_persistence_impl.md §4.4) ─────────
+    WORLD_CHUNK_MAX_PAYLOAD_BYTES: int = 1_048_576  # 1 MiB
+    WORLD_CHUNK_MAX_OBJECTS: int = 512
+    WORLD_CHUNK_MAX_BATCH: int = 64
+    WORLD_CHUNK_REVISION_KEEP: int = 20
+
     model_config = SettingsConfigDict(
         env_file=".env",
         env_file_encoding="utf-8",

backend/app/dependencies.py

@@ -53,3 +53,33 @@ async def get_current_user(
 
 
 CurrentUser = Annotated[User, Depends(get_current_user)]
+
+oauth2_scheme_optional = OAuth2PasswordBearer(tokenUrl="/api/auth/login", auto_error=False)
+
+
+async def get_optional_user(
+    token: Annotated[str | None, Depends(oauth2_scheme_optional)],
+    db: Annotated[AsyncSession, Depends(get_db)],
+) -> User | None:
+    """Resolve the JWT bearer token to a User if present and valid, otherwise None."""
+    if not token:
+        return None
+    try:
+        payload = jwt.decode(
+            token, settings.public_pem, algorithms=[settings.ALGORITHM]
+        )
+        user_id: str | None = payload.get("sub")
+        if user_id is None:
+            return None
+        user_id_int = int(user_id)
+    except (JWTError, ValueError, TypeError):
+        return None
+
+    result = await db.execute(select(User).where(User.id == user_id_int))
+    user = result.scalar_one_or_none()
+    if user is None or not user.is_active:
+        return None
+    return user
+
+
+OptionalUser = Annotated[User | None, Depends(get_optional_user)]

backend/app/gateway/__init__.py

@@ -0,0 +1 @@
+"""WebSocket real-time gateway package."""

backend/app/gateway/ws.py

@@ -0,0 +1,538 @@
+"""Real-time WebSocket gateway.
+
+Multiplexes presence, DM, and world-chat delivery over a single WebSocket
+endpoint (docs/planning/social.md US-2, US-4).
+
+Key features:
+- Authentication via JWT token (query param or initial auth frame).
+- Scoped subscriptions to DM conversations and world channels.
+- Server-derived presence heartbeat (Redis TTL refreshed periodically).
+- Broadcast presence changes (online/offline) to mutual friends.
+- Fan-out via Redis pub/sub.
+- Thread-safe & event-loop-safe dispatch for multi-instance and test environments.
+- Graceful reconnect without duplicate delivery or orphaned state.
+"""
+
+from __future__ import annotations
+
+import asyncio
+from contextlib import asynccontextmanager
+from datetime import datetime, timezone
+import json
+import logging
+from typing import Any
+
+from fastapi import APIRouter, WebSocket, WebSocketDisconnect, status
+from jose import JWTError, jwt
+from sqlalchemy import or_, select
+from sqlalchemy.ext.asyncio import AsyncSession
+import redis.asyncio as aioredis
+
+from app.config import settings
+from app.database import async_session_factory, get_db
+from app.models.chat import ConversationParticipant
+from app.models.social import Friendship, FriendshipStatus
+from app.models.user import User
+from app.models.world import World, WorldVisibility
+from app.services.presence import presence_store
+
+logger = logging.getLogger(__name__)
+
+router = APIRouter()
+
+
+@asynccontextmanager
+async def get_db_session():
+    """Helper to acquire an async DB session respecting test overrides if present."""
+    from app.main import app
+
+    override = app.dependency_overrides.get(get_db)
+    if override:
+        res = override()
+        if hasattr(res, "__anext__"):
+            session = await res.__anext__()
+            try:
+                yield session
+            finally:
+                try:
+                    await res.__anext__()
+                except (StopAsyncIteration, Exception):
+                    pass
+            return
+        elif hasattr(res, "__next__"):
+            session = next(res)
+            try:
+                yield session
+            finally:
+                try:
+                    next(res)
+                except (StopIteration, Exception):
+                    pass
+            return
+
+    async with async_session_factory() as session:
+        yield session
+
+
+async def authenticate_token(token: str) -> User | None:
+    """Validate JWT token and return authenticated User, or None."""
+    try:
+        payload = jwt.decode(token, settings.public_pem, algorithms=[settings.ALGORITHM])
+        user_id_raw = payload.get("sub")
+        if user_id_raw is None:
+            return None
+        user_id = int(user_id_raw)
+    except (JWTError, ValueError, TypeError):
+        return None
+
+    async with get_db_session() as db:
+        res = await db.execute(select(User).where(User.id == user_id))
+        user = res.scalar_one_or_none()
+        if user and user.is_active:
+            return user
+    return None
+
+
+async def get_friend_ids(user_id: int) -> set[int]:
+    """Return set of accepted friend user IDs for user_id."""
+    try:
+        async with get_db_session() as db:
+            res = await db.execute(
+                select(Friendship).where(
+                    or_(Friendship.requester_id == user_id, Friendship.addressee_id == user_id),
+                    Friendship.status == FriendshipStatus.ACCEPTED,
+                )
+            )
+            friendships = res.scalars().all()
+            return {
+                f.addressee_id if f.requester_id == user_id else f.requester_id
+                for f in friendships
+            }
+    except Exception as exc:
+        logger.error("Failed to get friend IDs for user %s: %s", user_id, exc, exc_info=True)
+        return set()
+
+
+async def check_world_access(world_id: int, user_id: int) -> bool:
+    """Verify if user has permission to join/view a world."""
+    async with get_db_session() as db:
+        res = await db.execute(select(World).where(World.id == world_id))
+        world = res.scalar_one_or_none()
+        if not world:
+            return False
+        if world.visibility == WorldVisibility.PUBLIC:
+            return True
+        if world.owner_id == user_id:
+            return True
+        if world.visibility == WorldVisibility.FRIENDS_ONLY:
+            res_fr = await db.execute(
+                select(Friendship.id).where(
+                    or_(
+                        and_(Friendship.requester_id == world.owner_id, Friendship.addressee_id == user_id),
+                        and_(Friendship.requester_id == user_id, Friendship.addressee_id == world.owner_id),
+                    ),
+                    Friendship.status == FriendshipStatus.ACCEPTED,
+                ).limit(1)
+            )
+            return res_fr.scalar_one_or_none() is not None
+        return False
+
+
+async def check_conversation_access(conversation_id: int, user_id: int) -> bool:
+    """Verify if user is a participant in the given conversation."""
+    async with get_db_session() as db:
+        res = await db.execute(
+            select(ConversationParticipant.id).where(
+                ConversationParticipant.conversation_id == conversation_id,
+                ConversationParticipant.user_id == user_id,
+            ).limit(1)
+        )
+        return res.scalar_one_or_none() is not None
+
+
+async def _async_update_last_seen(user_id: int, now: datetime):
+    try:
+        async with async_session_factory() as session:
+            res = await session.execute(select(User).where(User.id == user_id))
+            db_user = res.scalar_one_or_none()
+            if db_user:
+                db_user.last_seen_at = now
+                await session.commit()
+    except Exception:
+        pass
+
+
+class ConnectionManager:
+    """Manages active WebSocket connections, subscriptions, presence, and fan-out."""
+
+    def __init__(self):
+        # ws -> User
+        self._connections: dict[WebSocket, User] = {}
+        # ws -> event loop id
+        self._ws_loops: dict[WebSocket, int] = {}
+        # user_id -> set of active WebSockets
+        self._user_connections: dict[int, set[WebSocket]] = {}
+        # user_id -> cached friend user IDs
+        self._user_friend_ids: dict[int, set[int]] = {}
+        # world_id -> set of WebSockets
+        self._world_subs: dict[int, set[WebSocket]] = {}
+        # conversation_id -> set of WebSockets
+        self._dm_subs: dict[int, set[WebSocket]] = {}
+        # ws -> asyncio heartbeat task
+        self._heartbeat_tasks: dict[WebSocket, asyncio.Task] = {}
+        # Per-event-loop Redis pub/sub listener tasks and events
+        self._redis_tasks: dict[int, asyncio.Task] = {}
+        self._subscribed_events: dict[int, asyncio.Event] = {}
+
+    async def ensure_redis_listener(self):
+        """Ensure background Redis pub/sub listener is connected and subscribed for current loop."""
+        loop = asyncio.get_running_loop()
+        loop_key = id(loop)
+        task = self._redis_tasks.get(loop_key)
+        if task is None or task.done():
+            event = asyncio.Event()
+            self._subscribed_events[loop_key] = event
+            task = asyncio.create_task(self._redis_listener(loop_key, event))
+            self._redis_tasks[loop_key] = task
+        else:
+            event = self._subscribed_events.get(loop_key)
+
+        if event:
+            try:
+                await asyncio.wait_for(event.wait(), timeout=2.0)
+            except asyncio.TimeoutError:
+                pass
+
+    async def connect(self, websocket: WebSocket, user: User):
+        """Register an authenticated connection."""
+        await self.ensure_redis_listener()
+        loop_key = id(asyncio.get_running_loop())
+
+        self._connections[websocket] = user
+        self._ws_loops[websocket] = loop_key
+        self._user_connections.setdefault(user.id, set()).add(websocket)
+
+        # Cache friend IDs for instant presence dispatch
+        friend_ids = await get_friend_ids(user.id)
+        self._user_friend_ids[user.id] = friend_ids
+
+        # Mark user online in Redis and DB
+        await presence_store.heartbeat(user.id)
+        now = datetime.now(timezone.utc)
+        asyncio.create_task(_async_update_last_seen(user.id, now))
+
+        # Start periodic heartbeat task (every 20 seconds)
+        self._heartbeat_tasks[websocket] = asyncio.create_task(
+            self._run_periodic_heartbeat(user.id)
+        )
+
+        # Broadcast online presence to friends via Redis
+        await self.broadcast_presence(user.id, user.username, is_online=True, friend_ids=friend_ids)
+
+    async def disconnect(self, websocket: WebSocket):
+        """Unregister a connection and clean up subscriptions and presence."""
+        user = self._connections.pop(websocket, None)
+        self._ws_loops.pop(websocket, None)
+        task = self._heartbeat_tasks.pop(websocket, None)
+        if task:
+            task.cancel()
+
+        # Clean subscriptions
+        for world_id in list(self._world_subs.keys()):
+            self._world_subs[world_id].discard(websocket)
+            if not self._world_subs[world_id]:
+                self._world_subs.pop(world_id, None)
+
+        for conv_id in list(self._dm_subs.keys()):
+            self._dm_subs[conv_id].discard(websocket)
+            if not self._dm_subs[conv_id]:
+                self._dm_subs.pop(conv_id, None)
+
+        if user is None:
+            return
+
+        user_id = user.id
+        username = user.username
+        user_set = self._user_connections.get(user_id)
+        if user_set:
+            user_set.discard(websocket)
+            if not user_set:
+                self._user_connections.pop(user_id, None)
+
+        # If user has no more open connections, mark offline immediately
+        if user_id not in self._user_connections:
+            await presence_store.clear_heartbeat(user_id)
+            now = datetime.now(timezone.utc)
+            asyncio.create_task(_async_update_last_seen(user_id, now))
+            friend_ids = self._user_friend_ids.pop(user_id, set())
+            await self.broadcast_presence(
+                user_id, username, is_online=False, last_seen_at=now, friend_ids=friend_ids
+            )
+
+    async def _run_periodic_heartbeat(self, user_id: int):
+        """Keep Redis TTL alive while connection is open."""
+        try:
+            while True:
+                await asyncio.sleep(20)
+                await presence_store.heartbeat(user_id)
+        except asyncio.CancelledError:
+            pass
+
+    async def subscribe_world(self, websocket: WebSocket, world_id: int) -> bool:
+        user = self._connections.get(websocket)
+        if not user:
+            return False
+        allowed = await check_world_access(world_id, user.id)
+        if not allowed:
+            return False
+        self._world_subs.setdefault(world_id, set()).add(websocket)
+        return True
+
+    def unsubscribe_world(self, websocket: WebSocket, world_id: int):
+        if world_id in self._world_subs:
+            self._world_subs[world_id].discard(websocket)
+
+    async def subscribe_dm(self, websocket: WebSocket, conversation_id: int) -> bool:
+        user = self._connections.get(websocket)
+        if not user:
+            return False
+        allowed = await check_conversation_access(conversation_id, user.id)
+        if not allowed:
+            return False
+        self._dm_subs.setdefault(conversation_id, set()).add(websocket)
+        return True
+
+    def unsubscribe_dm(self, websocket: WebSocket, conversation_id: int):
+        if conversation_id in self._dm_subs:
+            self._dm_subs[conversation_id].discard(websocket)
+
+    async def send_to_ws(self, websocket: WebSocket, message: dict):
+        """Deliver frame to websocket if it belongs to current event loop."""
+        cur_loop = id(asyncio.get_running_loop())
+        if self._ws_loops.get(websocket) != cur_loop:
+            return
+        try:
+            await websocket.send_text(json.dumps(message, default=str))
+        except Exception:
+            pass
+
+    async def broadcast_world_chat(
+        self, world_id: int, message_payload: dict, room_id: int | None = None
+    ):
+        """Send world chat message to all connected clients on this loop subscribed to world_id."""
+        targets = list(self._world_subs.get(world_id, set()))
+        if not targets:
+            return
+        frame = {
+            "type": "world_chat",
+            "world_id": world_id,
+            "room_id": room_id,
+            "message": message_payload,
+        }
+        for ws in targets:
+            await self.send_to_ws(ws, frame)
+
+    async def broadcast_dm_chat(self, conversation_id: int, message_payload: dict):
+        """Send DM message to all connected clients on this loop subscribed to conversation_id."""
+        targets = list(self._dm_subs.get(conversation_id, set()))
+        frame = {
+            "type": "dm_chat",
+            "conversation_id": conversation_id,
+            "message": message_payload,
+        }
+        for ws in targets:
+            await self.send_to_ws(ws, frame)
+
+    async def broadcast_presence(
+        self,
+        user_id: int,
+        username: str,
+        is_online: bool,
+        last_seen_at: datetime | None = None,
+        friend_ids: set[int] | None = None,
+    ):
+        """Broadcast presence update to mutual friends via Redis."""
+        if friend_ids is None:
+            friend_ids = await get_friend_ids(user_id)
+        if not friend_ids:
+            return
+
+        frame = {
+            "type": "presence",
+            "user_id": user_id,
+            "username": username,
+            "is_online": is_online,
+            "last_seen_at": last_seen_at.isoformat() if last_seen_at else None,
+            "friend_ids": list(friend_ids),
+        }
+
+        # Redis broadcast for all loops/instances
+        try:
+            client = aioredis.from_url(settings.REDIS_URL, encoding="utf-8", decode_responses=True)
+            async with client:
+                await client.publish("presence:events", json.dumps(frame, default=str))
+        except Exception as exc:
+            logger.error("Failed to publish presence to Redis: %s", exc, exc_info=True)
+
+    async def _redis_listener(self, loop_key: int, event: asyncio.Event):
+        """Listen to Redis pub/sub channels for cross-instance message dispatch."""
+        while True:
+            try:
+                client = aioredis.from_url(settings.REDIS_URL, encoding="utf-8", decode_responses=True)
+                pubsub = client.pubsub()
+                await pubsub.psubscribe("world:*:chat", "dm:*:chat", "presence:events")
+                event.set()
+                logger.info("Gateway Redis pub/sub listener active for loop %s", loop_key)
+                async for message in pubsub.listen():
+                    if message["type"] != "pmessage":
+                        continue
+                    channel = message["channel"]
+                    raw_data = message["data"]
+                    try:
+                        data = json.loads(raw_data)
+                    except Exception:
+                        continue
+
+                    if channel.startswith("world:") and channel.endswith(":chat"):
+                        parts = channel.split(":")
+                        world_id = int(parts[1])
+                        await self.broadcast_world_chat(world_id, data, room_id=data.get("room_id"))
+                    elif channel.startswith("dm:") and channel.endswith(":chat"):
+                        parts = channel.split(":")
+                        conv_id = int(parts[1])
+                        await self.broadcast_dm_chat(conv_id, data)
+                    elif channel == "presence:events":
+                        logger.info("Redis presence event received: %s. Active users: %s", data, list(self._user_connections.keys()))
+                        for friend_id in data.get("friend_ids", []):
+                            targets = list(self._user_connections.get(friend_id, set()))
+                            logger.info("Friend %s has %s targets", friend_id, len(targets))
+                            for ws in targets:
+                                await self.send_to_ws(ws, data)
+            except asyncio.CancelledError:
+                break
+            except Exception as exc:
+                logger.debug("Redis listener encountered error, retrying in 2s: %s", exc)
+                event.clear()
+                await asyncio.sleep(2)
+
+
+connection_manager = ConnectionManager()
+
+
+# ──────────────────────────────── WebSocket Route ────────────────────────────
+
+
+@router.websocket("/ws")
+async def websocket_gateway(websocket: WebSocket, token: str | None = None):
+    """Main WebSocket gateway endpoint for real-time presence and chat."""
+    user: User | None = None
+    # 1. Check query parameter token
+    if token:
+        user = await authenticate_token(token)
+        if user is None:
+            await websocket.close(code=status.WS_1008_POLICY_VIOLATION)
+            return
+
+    await websocket.accept()
+
+    # 2. If not authenticated via query param, wait for first auth frame
+    if user is None:
+        try:
+            raw = await asyncio.wait_for(websocket.receive_text(), timeout=3.0)
+            data = json.loads(raw)
+            if data.get("type") == "auth" and data.get("token"):
+                user = await authenticate_token(data["token"])
+        except (asyncio.TimeoutError, json.JSONDecodeError, WebSocketDisconnect):
+            pass
+
+        if user is None:
+            try:
+                await websocket.send_text(json.dumps({"type": "error", "message": "Authentication failed"}))
+                await websocket.close(code=status.WS_1008_POLICY_VIOLATION)
+            except Exception:
+                pass
+            return
+
+    # Mark user online in Redis immediately upon successful auth
+    await presence_store.heartbeat(user.id)
+
+    # Send auth_ok handshake immediately upon successful authentication
+    await websocket.send_text(
+        json.dumps({
+            "type": "auth_ok",
+            "user_id": user.id,
+            "username": user.username,
+        })
+    )
+
+    # Register with connection manager for presence and real-time event delivery
+    await connection_manager.connect(websocket, user)
+
+    try:
+        while True:
+            text = await websocket.receive_text()
+            try:
+                msg = json.loads(text)
+            except json.JSONDecodeError:
+                await websocket.send_text(json.dumps({"type": "error", "message": "Invalid JSON"}))
+                continue
+
+            msg_type = msg.get("type")
+            if msg_type == "ping":
+                await websocket.send_text(json.dumps({"type": "pong"}))
+            elif msg_type == "heartbeat":
+                await presence_store.heartbeat(user.id)
+                await websocket.send_text(json.dumps({"type": "heartbeat_ack"}))
+            elif msg_type in ("subscribe_world", "subscribe") and (
+                msg.get("world_id") or msg.get("channel") == "world"
+            ):
+                world_id = msg.get("world_id") or msg.get("id")
+                if isinstance(world_id, int):
+                    ok = await connection_manager.subscribe_world(websocket, world_id)
+                    if ok:
+                        await websocket.send_text(
+                            json.dumps({"type": "subscribed", "channel": "world", "id": world_id})
+                        )
+                    else:
+                        await websocket.send_text(
+                            json.dumps({"type": "error", "message": f"Cannot subscribe to world {world_id}"})
+                        )
+            elif msg_type in ("unsubscribe_world", "unsubscribe") and (
+                msg.get("world_id") or msg.get("channel") == "world"
+            ):
+                world_id = msg.get("world_id") or msg.get("id")
+                if isinstance(world_id, int):
+                    connection_manager.unsubscribe_world(websocket, world_id)
+                    await websocket.send_text(
+                        json.dumps({"type": "unsubscribed", "channel": "world", "id": world_id})
+                    )
+            elif msg_type in ("subscribe_dm", "subscribe") and (
+                msg.get("conversation_id") or msg.get("channel") == "dm"
+            ):
+                conv_id = msg.get("conversation_id") or msg.get("id")
+                if isinstance(conv_id, int):
+                    ok = await connection_manager.subscribe_dm(websocket, conv_id)
+                    if ok:
+                        await websocket.send_text(
+                            json.dumps({"type": "subscribed", "channel": "dm", "id": conv_id})
+                        )
+                    else:
+                        await websocket.send_text(
+                            json.dumps({"type": "error", "message": f"Cannot subscribe to conversation {conv_id}"})
+                        )
+            elif msg_type in ("unsubscribe_dm", "unsubscribe") and (
+                msg.get("conversation_id") or msg.get("channel") == "dm"
+            ):
+                conv_id = msg.get("conversation_id") or msg.get("id")
+                if isinstance(conv_id, int):
+                    connection_manager.unsubscribe_dm(websocket, conv_id)
+                    await websocket.send_text(
+                        json.dumps({"type": "unsubscribed", "channel": "dm", "id": conv_id})
+                    )
+            else:
+                await websocket.send_text(json.dumps({"type": "error", "message": f"Unknown action: {msg_type}"}))
+
+    except WebSocketDisconnect:
+        pass
+    finally:
+        await connection_manager.disconnect(websocket)