Update protocol version to 6 and enhance API documentation

- Incremented the protocol version from 5 to 6 in the Atlas API documentation, reflecting the latest changes in server/plugin compatibility.
- Added new API endpoints for live patch streaming and updated the server info response structure to include additional fields such as `unexpectedPlaceIds` and `gameId`.
- Improved the WebSocket protocol documentation to align with the new versioning.
- Enhanced metadata handling in the syncback rules and clarified the structure of meta files, including the introduction of new properties and adjustments to existing ones.

These updates improve clarity and maintainability of the API documentation and ensure better alignment with the latest implementation changes.

.cursor/rules/atlas-project.mdc

@@ -101,6 +101,7 @@ Used in `tree` and recursively for all children.
 | `*.lua` | ModuleScript | — | Legacy |
 | `*.server.lua` | Script | Legacy | Legacy |
 | `*.client.lua` | LocalScript | — | Legacy |
+| `*.plugin.lua` | Script | Plugin | Legacy |
 
 **Prefer `.luau`** — modern RunContext. `.lua` is legacy (still supported).
 
@@ -199,6 +200,9 @@ Configure `syncbackRules` object for Roblox → filesystem sync:
 | `syncCurrentCamera` | bool | `false` | Whether to sync `Workspace.CurrentCamera` |
 | `syncUnscriptable` | bool | `true` | Whether to sync unscriptable properties |
 | `ignoreReferents` | bool | `false` | Whether to skip Ref properties (e.g., `Model.PrimaryPart`) |
+| `createIgnoreDirPaths` | bool | `false` | Whether `/**` in ignore paths also matches the directory itself |
+| `ignoreHiddenServices` | bool | — | Override root-level `ignoreHiddenServices` for syncback |
+| `warnDuplicateNames` | bool | `false` | Warn on duplicate child names during syncback |
 
 ```json5
 {
@@ -212,42 +216,70 @@ Configure `syncbackRules` object for Roblox → filesystem sync:
     "ignoreClasses": ["Terrain", "Camera"],
     "syncCurrentCamera": false,
     "syncUnscriptable": true,
-    "ignoreReferents": false
+    "ignoreReferents": false,
+    "createIgnoreDirPaths": false,
+    "warnDuplicateNames": false
   }
 }
 ```
 
 ## Meta Files
 
-Add metadata to file-based instances. Example: `MyScript.server.meta.json5` (for `MyScript.server.luau`)
+Add metadata to file-based instances. Meta files use **camelCase keys** (no `$` prefix -- that's only for ProjectNode).
+
+**Adjacent meta** (e.g. `MyScript.server.meta.json5` for `MyScript.server.luau`):
 
 ```json5
 {
-  "$className": "Script",        // Override (rare)
-  "$properties": { "Disabled": false },
-  "$attributes": { "Priority": 1 },
-  "$ignoreUnknownInstances": true
+  "name": "Key:Script",              // Override filename-derived instance name (slugify support)
+  "id": "unique-id",                 // For Ref property linking
+  "properties": { "Disabled": false },
+  "attributes": { "Priority": 1 },
+  "ignoreUnknownInstances": true
 }
 ```
 
-**Meta files CAN'T:** Override name, set `$path`, have children.
+**Directory meta** (e.g. `init.meta.json5` inside a directory):
+
+```json5
+{
+  "name": "My:Folder",              // Override directory-derived instance name
+  "className": "Configuration",     // Override class (directory meta only)
+  "id": "unique-id",
+  "properties": { "Anchored": true },
+  "attributes": { "Health": 100 },
+  "ignoreUnknownInstances": false
+}
+```
+
+**Key differences from ProjectNode:** Meta uses `className`, `properties`, `attributes` (camelCase, no `$` prefix). Adjacent meta does NOT support `className`.
+
+**`name` field (slugify support):** When an instance name contains forbidden filesystem characters (`: / ? * < > | " \`), syncback slugifies the filename (forbidden chars → `_`) and stores the real name in the `name` field. On forward sync, `name` overrides the filename-derived instance name. On collisions (e.g. `A/B` and `A_B` both slugify to `A_B`), `~1`, `~2` suffixes are appended and meta `name` fields distinguish them.
+
+**Meta files CAN'T:** Set `$path`, have children.
 
 ## Model.json5 Format
 
-Inline instance definition:
+Inline instance definition. Like meta files, model files use **camelCase keys** (no `$` prefix).
 
 ```json5
 {
-  "$className": "Tool",
-  "$properties": { "CanBeDropped": false },
-  "$attributes": { "Damage": 50 },
-  "Handle": {
-    "$className": "Part",
-    "$properties": { "Size": [1, 1, 3] }
+  "name": "What?Model",                   // Override filename-derived name (slugify support)
+  "className": "Tool",
+  "id": "unique-id",
+  "properties": { "CanBeDropped": false },
+  "attributes": { "Damage": 50 },
+  "children": {
+    "Handle": {
+      "className": "Part",
+      "properties": { "Size": [1, 1, 3] }
+    }
   }
 }
 ```
 
+**Note:** Children are nested under a `"children"` key (not flattened like in ProjectNode).
+
 ## Property Formats
 
 ### Shorthand (Recommended)