Update references to UserGeneratedLLC in documentation and enhance project file specifications

- Changed all instances of `rojo-rbx` to `UserGeneratedLLC` in the rbx-dom and rojo documentation to reflect the new repository ownership.
- Updated project file format specifications to prioritize `.project.json5` over `.project.json`, clarifying the preferred file extensions and their usage.
- Revised syncback documentation to reflect changes in file extensions from `.lua` to `.luau`, ensuring consistency across the project.
- Improved clarity in the API and communication architecture documentation, emphasizing the new structure and endpoints.

.cursor/rules/rbx-dom.mdc

@@ -8,7 +8,7 @@ globs:
 
 # rbx-dom Submodule
 
-**This is a Git submodule** linking to https://github.com/rojo-rbx/rbx-dom - a separate project with its own repository, CI/CD, and release cycle.
+**This is a Git submodule** linking to https://github.com/UserGeneratedLLC/rbx-dom - a separate project with its own repository, CI/CD, and release cycle.
 
 **Critical:** When working on rbx-dom code, refer to `rbx-dom/README.md` and follow that project's conventions, not Rojo's.
 
@@ -65,7 +65,7 @@ A collection of cross-platform libraries enabling any software to interact with
 
 ```bash
 # Clone Rojo with submodules
-git clone --recursive https://github.com/rojo-rbx/rojo
+git clone --recursive https://github.com/UserGeneratedLLC/rojo
 
 # Or update existing submodules
 git submodule update --init --recursive
@@ -105,7 +105,7 @@ Since rbx-dom is a separate repository:
 
 1. **Fork and clone rbx-dom separately** for development
 2. **Make changes in the rbx-dom repository** (not the submodule)
-3. **Open PRs against rojo-rbx/rbx-dom** (not rojo-rbx/rojo)
+3. **Open PRs against UserGeneratedLLC/rbx-dom** (not UserGeneratedLLC/rojo)
 4. **Update Rojo's submodule** only after rbx-dom changes are merged
 
 ### Testing Changes
@@ -152,7 +152,7 @@ rbx-dom packages must be published **in dependency order**:
 4. `rbx_binary` and `rbx_xml` (depend on all above)
 
 **Only maintainers can publish.** If you need a new rbx-dom release:
-1. Open issue in rojo-rbx/rbx-dom
+1. Open issue in UserGeneratedLLC/rbx-dom
 2. Explain what features/fixes you need
 3. Maintainers will coordinate release
 
@@ -168,10 +168,10 @@ git submodule update --init --recursive
 cd rbx-dom && git checkout main && git pull
 ```
 
-**Property bugs:** Check `rbx-dom/test-files/` for similar cases, file issue in rojo-rbx/rbx-dom
+**Property bugs:** Check `rbx-dom/test-files/` for similar cases, file issue in UserGeneratedLLC/rbx-dom
 
 **Outdated reflection:** File issue requesting reflection database update (maintainers run `rbx_reflector`)
 
 ## Contributing to rbx-dom
 
-See https://github.com/rojo-rbx/rbx-dom. Remember: rbx-dom is designed for projects beyond Rojo, so changes should be general-purpose.
+See https://github.com/UserGeneratedLLC/rbx-dom. Remember: rbx-dom is designed for projects beyond Rojo, so changes should be general-purpose.

.cursor/rules/rojo-syncback.mdc

@@ -71,8 +71,8 @@ pub fn syncback_loop(
 
 **Default behavior.** Preserves existing file structure:
 
-- If `src/MyScript.lua` exists, update it
-- If `src/MyFolder/init.lua` exists (directory structure), preserve it
+- If `src/MyScript.luau` exists, update it
+- If `src/MyFolder/init.luau` exists (directory structure), preserve it
 - Only creates new files when instances don't match anything
 - Compares hashes to detect actual changes (avoids rewriting unchanged files)
 
@@ -119,7 +119,7 @@ pub struct SyncbackRules {
 - Filters out `Name`, `Parent` (always)
 - Filters out properties in `ignore_properties`
 - Filters out unscriptable properties if `sync_unscriptable: false`
-- Filters out middleware-specific properties (e.g., `Script.Source` when writing to `.lua` file)
+- Filters out middleware-specific properties (e.g., `Script.Source` when writing to `.luau` file)
 
 ### Hidden Services
 
@@ -198,11 +198,11 @@ pub struct SyncbackSnapshot<'sync> {
 ```rust
 // Join child to current path
 snapshot.with_joined_path(new_ref, old_ref)?
-// Result: parent_path/ChildName.lua
+// Result: parent_path/ChildName.luau
 
 // Use base path
 snapshot.with_base_path(&base, new_ref, old_ref)?
-// Result: base/ChildName.lua
+// Result: base/ChildName.luau
 
 // Explicit path
 snapshot.with_new_path(path, new_ref, old_ref)
@@ -213,7 +213,7 @@ snapshot.with_new_path(path, new_ref, old_ref)
 - Uses instance name
 - Adds appropriate extension based on middleware
 - Encodes Windows-invalid chars if enabled
-- Example: `Script` named "My Script" → `My Script.server.lua`
+- Example: `Script` named "My Script" → `My Script.server.luau`
 
 ### Property Filtering
 
@@ -232,7 +232,7 @@ snapshot.get_path_filtered_properties(new_ref)
 **Decision tree:**
 
 1. **Old instance exists?** → Use same middleware as before (preserve structure)
-2. **Script type?** → Choose appropriate Lua middleware (`.server.lua`, `.client.lua`, etc.)
+2. **Script type?** → Choose appropriate Lua middleware (`.server.luau`, `.client.luau`, etc.)
 3. **Model/container?** → Choose directory or rbxm based on complexity
 4. **Special types?** → CSV for LocalizationTable, TXT for StringValue
 5. **Fallback** → Rbxm or JsonModel
@@ -334,14 +334,14 @@ Script "MyScript"
 ```
 
 **Syncback produces:**
-```lua
--- src/MyScript.server.lua
+```luau
+-- src/MyScript.server.luau
 print('hello')
 ```
 
 **Meta file (if needed):**
 ```json5
-// src/MyScript.server.meta.json5
+// src/MyScript.server.meta.json5 (for MyScript.server.luau)
 {
     "$properties": {
         "Disabled": false
@@ -352,7 +352,7 @@ print('hello')
 ### Syncing a Model
 
 **Simple model (few children):** → `.rbxm` or `.rbxmx` file
-**Complex model (many children):** → Directory with `init.meta.json5`
+**Complex model (many children):** → Directory with `init.meta.json5` or `init.luau`
 
 ### Syncing Nested Folders
 
@@ -365,9 +365,9 @@ Roblox:
 
 Filesystem:
   src/Modules/
-    Utils.lua
+    Utils.luau
     Math/
-      Add.lua
+      Add.luau
 ```
 
 ## Error Handling

.cursor/rules/rojo.mdc

@@ -33,11 +33,11 @@ This avoids manual tree manipulation bugs and handles complex cases (large model
 
 ## Project Files
 
-`.project.json` or `.project.json5` (JSON5 preferred for comments):
+`.project.json5` (preferred) | `.project.json` (legacy):
 
 ```json5
 {
-  name: "MyProject",  // Optional if default.project.json (inherits folder name)
+  name: "MyProject",  // Optional if default.project.json5 (inherits folder name)
   tree: {
     $path: "src"
   },
@@ -50,8 +50,9 @@ This avoids manual tree manipulation bugs and handles complex cases (large model
 
 **Key conventions:**
 - Services don't need explicit `$className` (inferred)
-- `default.project.json` inherits parent folder name
+- `default.project.json5` inherits parent folder name
 - Projects can be nested (each has independent sync rules)
+- **Use `.luau` for scripts, `.json5` for config** (`.lua`/`.json` are legacy but supported)
 
 ## Contributing
 
@@ -66,7 +67,7 @@ For plugin work: Luau LSP, Studio with "Reload plugins on file change"
 ### Initial Setup
 
 ```bash
-git clone --recursive https://github.com/rojo-rbx/rojo
+git clone --recursive https://github.com/UserGeneratedLLC/rojo
 cd rojo
 rokit install  # Installs tools from rokit.toml
 cargo test     # Verify setup
@@ -127,7 +128,7 @@ Every PR updates `CHANGELOG.md`:
 
 * Made a change to Rojo ([#1234])
 
-[#1234]: https://github.com/rojo-rbx/rojo/pull/1234
+[#1234]: https://github.com/UserGeneratedLLC/rojo/pull/1234
 ```
 
 Keep link definitions in ascending order.

.cursor/rules/src.mdc

@@ -38,25 +38,29 @@ pub struct InstanceSnapshot {
 
 Transforms files → `InstanceSnapshot`. Main entry: `snapshot_from_vfs()`
 
-| File | Handler | Result |
-|------|---------|--------|
-| `*.lua` / `*.luau` | `lua.rs` | ModuleScript |
-| `*.server.luau` | `lua.rs` | Script (RunContext.Server) |
-| `*.server.lua` | `lua.rs` | Script (RunContext.Legacy) |
-| `*.client.luau` | `lua.rs` | Script (RunContext.Client) |
-| `*.client.lua` | `lua.rs` | LocalScript |
-| `*.plugin.lua(u)` | `lua.rs` | Script (RunContext.Plugin) |
-| `*.local.lua(u)` | `lua.rs` | LocalScript |
-| `*.legacy.lua(u)` | `lua.rs` | Script (RunContext.Legacy) |
-| `*.rbxm` / `*.rbxmx` | `rbxm.rs` / `rbxmx.rs` | Binary/XML model tree |
-| `*.model.json` | `json_model.rs` | JSON instance |
-| `*.project.json` | `project.rs` | Nested project |
-| `*.csv` / `*.txt` | `csv.rs` / `txt.rs` | LocalizationTable / StringValue |
-| `*.toml` / `*.json` / `*.yaml` | Data → ModuleScript |
-| Directory | `dir.rs` | Folder or inferred service |
-| `*.meta.json` | `meta_file.rs` | Metadata overlay |
+| File | Handler | Result | Note |
+|------|---------|--------|------|
+| `*.luau` | `lua.rs` | ModuleScript | Preferred |
+| `*.server.luau` | `lua.rs` | Script (RunContext.Server) | Preferred |
+| `*.client.luau` | `lua.rs` | Script (RunContext.Client) | Preferred |
+| `*.plugin.luau` | `lua.rs` | Script (RunContext.Plugin) | |
+| `*.local.luau` | `lua.rs` | LocalScript | |
+| `*.legacy.luau` | `lua.rs` | Script (RunContext.Legacy) | |
+| `*.lua` | `lua.rs` | ModuleScript | Legacy |
+| `*.server.lua` | `lua.rs` | Script (RunContext.Legacy) | Legacy |
+| `*.client.lua` | `lua.rs` | LocalScript | Legacy |
+| `*.rbxm` / `*.rbxmx` | `rbxm.rs` / `rbxmx.rs` | Binary/XML model tree | |
+| `*.model.json5` | `json_model.rs` | JSON instance | Preferred |
+| `*.model.json` | `json_model.rs` | JSON instance | Legacy |
+| `*.project.json5` | `project.rs` | Nested project | Preferred |
+| `*.project.json` | `project.rs` | Nested project | Legacy |
+| `*.csv` / `*.txt` | `csv.rs` / `txt.rs` | LocalizationTable / StringValue | |
+| `*.toml` / `*.json5` / `*.yaml` | Data → ModuleScript | |
+| Directory | `dir.rs` | Folder or inferred service | |
+| `*.meta.json5` | `meta_file.rs` | Metadata overlay | Preferred |
+| `*.meta.json` | `meta_file.rs` | Metadata overlay | Legacy |
 
-**Init files:** `init.lua`, `init.server.lua`, etc. → Instance named after parent directory
+**Init files:** `init.luau`, `init.server.luau`, etc. → Instance named after parent directory (`.lua` legacy supported)
 
 **Context passed to middleware:**
 
@@ -94,7 +98,7 @@ Reverse: Roblox file → filesystem
 
 ### 6. Project System (`src/project.rs`)
 
-Parse/validate `.project.json`, handle nested projects, manage sync rules.
+Parse/validate `.project.json5` (or legacy `.project.json`), handle nested projects, manage sync rules.
 
 ## Command Implementations