diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..3fb6471
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,12 @@
+# Enforce LF line endings for text files on all platforms.
+# Prettier config sets `endOfLine: lf`, so checkout must match.
+* text=auto eol=lf
+
+# Binary files - do not touch
+*.png binary
+*.jpg binary
+*.jpeg binary
+*.gif binary
+*.ico binary
+*.zip binary
+*.pdf binary
diff --git a/README.md b/README.md
index 90f538b..e800d7f 100644
--- a/README.md
+++ b/README.md
@@ -46,16 +46,18 @@ This uses `codeql pack ls` to discover all packs in the workspace and runs `code
 
 > **Note:** The generated `codeql-pack.lock.yml` files should be committed to your repository to ensure reproducible dependency resolution across your team.
 
-### Step 3: Create an Issue for the CodeQL query you want to develop
+### Step 3: Create an Issue for the CodeQL query or data extension you want to develop
 
 1. **Navigate to Issues** in your new repository
 2. **Click "New Issue"**
-3. **Select "Request new CodeQL Query"** template
-4. **Fill in the details:**
-   - Choose target language (e.g., Java, Python, JavaScript)
-   - Describe what the query should detect
-   - Provide code examples (optional but recommended)
-   - Specify severity level
+3. **Select a template:**
+   - **"Request new CodeQL Query"** for custom query development
+   - **"Request new CodeQL Data Extension"** for modeling an unmodeled library via YAML (models-as-data)
+4. **Fill in the template fields** — each template will guide you, but at minimum:
+   - **Target language**
+   - **Description** of what to detect or which library to model
+   - **Library URL** (data extensions) or **Severity level** (queries)
+   - **Code Examples** (recommended — helps Copilot generate better results)
 5. **Submit the issue**
 
 ### Step 4: Assign Issue to `@copilot`
@@ -68,7 +70,7 @@ This uses `codeql pack ls` to discover all packs in the workspace and runs `code
 
 1. **Navigate to the generated Pull Request**
 2. **Review the changes:**
-   - Query implementation (`.ql` files)
+   - Query implementation (`.ql` files) or data extensions (`.model.yml` files)
    - Test cases (in `test/` directories)
    - Query documentation (`.md` and `.qhelp` files)
 3. **Check CI/CD results:**
@@ -80,11 +82,12 @@ This uses `codeql pack ls` to discover all packs in the workspace and runs `code
 
 ## 📋 Available Issue Templates
 
-| Template                                                                 | Purpose                                                                        |
-| ------------------------------------------------------------------------ | ------------------------------------------------------------------------------ |
-| [Request new CodeQL Query](.github/ISSUE_TEMPLATE/query-create.yml)      | Create a new CodeQL query to detect specific code patterns or vulnerabilities  |
-| [Update existing CodeQL Query](.github/ISSUE_TEMPLATE/query-update.yml)  | Modify an existing query to improve accuracy or add new detection capabilities |
-| [Improve Prompts/Instructions](.github/ISSUE_TEMPLATE/prompt-update.yml) | Contribute improvements to the AI guidance system                              |
+| Template                                                                              | Purpose                                                                                  |
+| ------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------- |
+| [Request new CodeQL Query](.github/ISSUE_TEMPLATE/query-create.yml)                   | Create a new CodeQL query to detect specific code patterns or vulnerabilities            |
+| [Update existing CodeQL Query](.github/ISSUE_TEMPLATE/query-update.yml)               | Modify an existing query to improve accuracy or add new detection capabilities           |
+| [Request new CodeQL Data Extension](.github/ISSUE_TEMPLATE/data-extension-create.yml) | Create a data extension (models-as-data YAML) to model an unmodeled library or framework |
+| [Improve Prompts/Instructions](.github/ISSUE_TEMPLATE/prompt-update.yml)              | Contribute improvements to the AI guidance system                                        |
 
 ## Repository Structure
 
@@ -117,7 +120,7 @@ codeql-development-template/
 
 This template implements a **hierarchical prompt system** that maximizes GitHub Copilot's effectiveness:
 
-1. **Issue Templates** provide structured input for query requirements
+1. **Issue Templates** provide structured input for query and model requirements
 2. **Language-Specific Instructions** guide Copilot with relevant context
 3. **High-Level Prompts** break down complex CodeQL workflows
 4. **Tool-Specific Resources** provide CLI usage examples and patterns
@@ -135,18 +138,20 @@ See [PROMPTS.md](PROMPTS.md) for details on the prompt hierarchy system.
 
 ## Supported Languages
 
-The template supports CodeQL query development for:
-
-| Language              | CodeQL Library |
-| --------------------- | -------------- |
-| GitHub Actions        | `actions`      |
-| C/C++                 | `cpp`          |
-| C#                    | `csharp`       |
-| Go                    | `go`           |
-| Java                  | `java`         |
-| JavaScript/TypeScript | `javascript`   |
-| Python                | `python`       |
-| Ruby                  | `ruby`         |
+CodeQL supports the following languages. This template provides query development and/or data extension (models-as-data) guidance for each:
+
+| Language              | CodeQL Library | Query Development | Model Development |
+| --------------------- | -------------- | :---------------: | :---------------: |
+| C/C++                 | `cpp`          |        ✅         |        ✅         |
+| C#                    | `csharp`       |        ✅         |        ✅         |
+| GitHub Actions        | `actions`      |        ✅         |                   |
+| Go                    | `go`           |        ✅         |        ✅         |
+| Java/Kotlin           | `java`         |        ✅         |        ✅         |
+| JavaScript/TypeScript | `javascript`   |        ✅         |        ✅         |
+| Python                | `python`       |        ✅         |        ✅         |
+| Ruby                  | `ruby`         |        ✅         |        ✅         |
+| Rust                  | `rust`         |                   |                   |
+| Swift                 | `swift`        |                   |                   |
 
 ## License
 
diff --git a/package.json b/package.json
index 650f321..71326bc 100644
--- a/package.json
+++ b/package.json
@@ -25,12 +25,12 @@
     "yaml-eslint-parser": "^2.0.0"
   },
   "scripts": {
-    "format": "prettier --write '**/*.{yml,yaml,md}'",
-    "format:check": "prettier --check '**/*.{yml,yaml,md}'",
+    "format": "prettier --write \"**/*.{yml,yaml,md}\"",
+    "format:check": "prettier --check \"**/*.{yml,yaml,md}\"",
     "lint": "npm run lint:markdown && npm run lint:yaml",
     "lint:fix": "npm run lint:markdown:fix && npm run lint:yaml:fix",
-    "lint:markdown": "eslint '**/README.md'",
-    "lint:markdown:fix": "eslint '**/README.md' --fix",
+    "lint:markdown": "eslint \"**/README.md\"",
+    "lint:markdown:fix": "eslint \"**/README.md\" --fix",
     "lint:yaml": "eslint --ext .yml,.yaml .github/workflows/ .github/ISSUE_TEMPLATE/",
     "lint:yaml:fix": "eslint --ext .yml,.yaml .github/workflows/ .github/ISSUE_TEMPLATE/ --fix",
     "test:lint": "npm run lint:yaml && npm run lint:markdown && npm run format:check",