diff --git a/.github/workflows/checks.quality.yaml b/.github/workflows/checks.quality.yaml
index 72bd9300..e8e34b8f 100644
--- a/.github/workflows/checks.quality.yaml
+++ b/.github/workflows/checks.quality.yaml
@@ -74,3 +74,28 @@ jobs:
       -
         name: Analyzing the code with pylint
         run: npm run lint:pylint
+
+  validate-collection-files:
+    runs-on: ${{ matrix.os }}-latest
+    strategy:
+      matrix:
+        os: [ macos, ubuntu, windows ]
+      fail-fast: false # Still interested to see results from other combinations
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v4
+      -
+        name: Setup node
+        uses: ./.github/actions/setup-node
+      -
+        name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.x'
+      -
+        name: Install dependencies
+        run: python3 -m pip install -r ./scripts/validate-collections-yaml/requirements.txt
+      -
+        name: Validate
+        run: python3 ./scripts/validate-collections-yaml
diff --git a/.gitignore b/.gitignore
index 595350d0..af927109 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,3 +14,7 @@ node_modules
 
 # macOS
 .DS_Store
+
+# Python
+__pycache__
+.venv
\ No newline at end of file
diff --git a/.vscode/extensions.json b/.vscode/extensions.json
index 013cc9f6..a5f07626 100644
--- a/.vscode/extensions.json
+++ b/.vscode/extensions.json
@@ -5,8 +5,10 @@
     "wengerk.highlight-bad-chars",      // Highlights bad chars.
     "wayou.vscode-todo-highlight",      // Highlights TODO.
     "wix.vscode-import-cost",           // Shows in KB how much a require include in code.
-    // Documentation
+    // Markdown
     "davidanson.vscode-markdownlint",   // Lints markdown.
+    // YAML
+    "redhat.vscode-yaml",               // Lints YAML files, validates against schema.
     // TypeScript / JavaScript
     "dbaeumer.vscode-eslint",           // Lints JavaScript/TypeScript.
     "pmneo.tsimporter",                 // Provides better auto-complete for TypeScripts imports.
diff --git a/docs/collection-files.md b/docs/collection-files.md
index f3239728..414fd8ea 100644
--- a/docs/collection-files.md
+++ b/docs/collection-files.md
@@ -1,11 +1,11 @@
 # Collection files
 
 privacy.sexy is a data-driven application that reads YAML files.
-This document details the structure and syntax of the YAML files located in [`application/collections`](./../src/application/collections/), which form the backbone of the application's data model.
+This document details the structure and syntax of the YAML files located in [`application/collections`](./../src/application/collections/), which form the backbone of the application's data model. The YAML schema [`.schema.yaml`](./../src/application/collections/.schema.yaml) is provided to provide better IDE support and be used in automated validations.
 
 Related documentation:
 
-- 📖 [`collection.yaml.d.ts`](./../src/application/collections/collection.yaml.d.ts) outlines code types.
+- 📖 [`Collections README`](./../src/application/collections/README.md) includes references to code as documentation.
 - 📖 [Script Guidelines](./script-guidelines.md) provide guidance on script creation including best-practices.
 
 ## Objects
diff --git a/docs/development.md b/docs/development.md
index b7a1f149..4c4b7d2b 100644
--- a/docs/development.md
+++ b/docs/development.md
@@ -80,8 +80,10 @@ See [ci-cd.md](./ci-cd.md) for more information.
 - [**`npm run install-deps [-- <options>]`**](../scripts/npm-install.js):
   - Manages NPM dependency installation, it offers capabilities like doing a fresh install, retries on network errors, and other features.
   - For example, you can run `npm run install-deps -- --fresh` to do clean installation of dependencies.
-- [**`python ./scripts/configure_vscode.py`**](../scripts/configure_vscode.py):
+- [**`python3 ./scripts/configure_vscode.py`**](../scripts/configure_vscode.py):
   - Optimizes Visual Studio Code settings and installs essential extensions, enhancing the development environment.
+- [**`python3 ./scripts/validate-collections-yaml`**](../scripts/validate-collections-yaml/README.md):
+  - Validates the syntax and structure of collection YAML files.
 
 #### Automation scripts
 
diff --git a/scripts/configure_vscode.py b/scripts/configure_vscode.py
index 809d3c38..29e83ab7 100755
--- a/scripts/configure_vscode.py
+++ b/scripts/configure_vscode.py
@@ -58,6 +58,10 @@ def add_or_update_settings() -> None:
     # Details: # pylint: disable-next=line-too-long
     #   - https://archive.ph/2024.01.06-003914/https://github.com/microsoft/vscode/issues/179274, https://web.archive.org/web/20240106003915/https://github.com/microsoft/vscode/issues/179274
 
+    # Disable telemetry
+    configure_setting_key('redhat.telemetry.enabled', False)
+    configure_setting_key('gitlens.telemetry.enabled', False)
+
 def configure_setting_key(configuration_key: str, desired_value: Any) -> None:
     try:
         with open(VSCODE_SETTINGS_JSON_FILE, 'r+', encoding='utf-8') as file:
diff --git a/scripts/validate-collections-yaml/README.md b/scripts/validate-collections-yaml/README.md
new file mode 100644
index 00000000..c9553ca4
--- /dev/null
+++ b/scripts/validate-collections-yaml/README.md
@@ -0,0 +1,51 @@
+# validate-collections-yaml
+
+This script validates YAML collection files against a predefined schema to ensure their integrity.
+
+## Prerequisites
+
+- Python 3.x installed on your system.
+
+## Running in a Virtual Environment (Recommended)
+
+Using a virtual environment isolates dependencies and prevents conflicts.
+
+1. **Create a virtual environment:**
+
+   ```bash
+   python3 -m venv ./scripts/validate-collections-yaml/.venv
+   ```
+
+2. **Activate the virtual environment:**
+
+   ```bash
+   source ./scripts/validate-collections-yaml/.venv/bin/activate
+   ```
+
+3. **Install dependencies:**
+
+   ```bash
+   python3 -m pip install -r ./scripts/validate-collections-yaml/requirements.txt
+   ```
+
+4. **Run the script:**
+
+   ```bash
+   python3 ./scripts/validate-collections-yaml
+   ```
+
+## Running Globally
+
+Running the script globally is less recommended due to potential dependency conflicts.
+
+1. **Install dependencies:**
+
+   ```bash
+   python3 -m pip install -r ./scripts/validate-collections-yaml/requirements.txt
+   ```
+
+2. **Run the script:**
+
+   ```bash
+   python3 ./scripts/validate-collections-yaml
+   ```
diff --git a/scripts/validate-collections-yaml/__main__.py b/scripts/validate-collections-yaml/__main__.py
new file mode 100644
index 00000000..150e7ec3
--- /dev/null
+++ b/scripts/validate-collections-yaml/__main__.py
@@ -0,0 +1,62 @@
+"""
+Description:
+  This script validates collection YAML files against the expected schema.
+
+Usage:
+  python3 ./scripts/validate-collections-yaml
+
+Notes:
+  This script requires the `jsonschema` and `pyyaml` packages (see requirements.txt).
+"""
+# pylint: disable=missing-function-docstring
+from os import path
+import sys
+from glob import glob
+from typing import List
+from jsonschema import exceptions, validate # pylint: disable=import-error
+import yaml # pylint: disable=import-error
+
+SCHEMA_FILE_PATH = './src/application/collections/.schema.yaml'
+COLLECTIONS_GLOB_PATTERN = './src/application/collections/*.yaml'
+
+def main() -> None:
+    schema_yaml = read_file(SCHEMA_FILE_PATH)
+    schema_json = convert_yaml_to_json(schema_yaml)
+    collection_file_paths = find_collection_files(COLLECTIONS_GLOB_PATTERN)
+    print(f'Found {len(collection_file_paths)} YAML files to validate.')
+
+    total_invalid_files = 0
+    for collection_file_path in collection_file_paths:
+        file_name = path.basename(collection_file_path)
+        print(f'Validating {file_name}...')
+        collection_yaml = read_file(collection_file_path)
+        collection_json = convert_yaml_to_json(collection_yaml)
+        try:
+            validate(instance=collection_json, schema=schema_json)
+            print(f'Success: {file_name} is valid.')
+        except exceptions.ValidationError as err:
+            print(f'Error: Validation failed for {file_name}.', file=sys.stderr)
+            print(str(err), file=sys.stderr)
+            total_invalid_files += 1
+
+    if total_invalid_files > 0:
+        print(f'Validation complete with {total_invalid_files} invalid files.', file=sys.stderr)
+        sys.exit(1)
+    else:
+        print('Validation complete. All files are valid.')
+        sys.exit(0)
+
+def read_file(file_path: str) -> str:
+    with open(file_path, 'r', encoding='utf-8') as file:
+        return file.read()
+
+def find_collection_files(glob_pattern: str) -> List[str]:
+    files = glob(glob_pattern)
+    filtered_files = [f for f in files if not path.basename(f).startswith('.')]
+    return filtered_files
+
+def convert_yaml_to_json(yaml_content: str) -> dict:
+    return yaml.safe_load(yaml_content)
+
+if __name__ == '__main__':
+    main()
diff --git a/scripts/validate-collections-yaml/requirements.txt b/scripts/validate-collections-yaml/requirements.txt
new file mode 100644
index 00000000..a6d6f3ad
--- /dev/null
+++ b/scripts/validate-collections-yaml/requirements.txt
@@ -0,0 +1,6 @@
+attrs==23.2.0
+jsonschema==4.22.0
+jsonschema-specifications==2023.12.1
+PyYAML==6.0.1
+referencing==0.35.1
+rpds-py==0.18.1
diff --git a/src/application/collections/.schema.yaml b/src/application/collections/.schema.yaml
new file mode 100644
index 00000000..bbbeb201
--- /dev/null
+++ b/src/application/collections/.schema.yaml
@@ -0,0 +1,192 @@
+# Schema Definition for Collection Files
+# Purpose:
+# - Defines the structure and data types for collection YAML files.
+# - Enhances IDE support with features like auto-completion and error checking.
+# - Used for automated validation of YAML files to ensure data integrity.
+
+$schema: 'https://json-schema.org/draft/2020-12/schema'
+
+$ref: '#/definitions/Collection'
+
+definitions:
+  Collection:
+    type: object
+    additionalProperties: false
+    properties:
+      os:
+        type: string
+        enum: [windows, macos, linux]
+      scripting:
+        $ref: '#/definitions/ScriptingDefinition'
+      actions:
+        type: array
+        items:
+          $ref: '#/definitions/Category'
+      functions:
+        type: array
+        items:
+          $ref: '#/definitions/Function'
+
+  ScriptingDefinition:
+    type: object
+    additionalProperties: false
+    required: [language, startCode, endCode]
+    properties:
+      language:
+        type: string
+      startCode:
+        type: string
+      endCode:
+        type: string
+
+  Category:
+    type: object
+    allOf:
+      - $ref: '#/definitions/ExecutableDefinition'
+    unevaluatedProperties: false
+    required: [children, category]
+    properties:
+      children:
+        type: array
+        items:
+          $ref: '#/definitions/Executable'
+      category:
+        type: string
+
+  Executable:
+    oneOf:
+      - $ref: '#/definitions/Category'
+      - $ref: '#/definitions/Script'
+
+  ExecutableDefinition:
+    allOf:
+      - $ref: '#/definitions/Documentable'
+
+  Script:
+    type: object
+    unevaluatedProperties: false
+    anyOf:
+      - $ref: '#/definitions/CodeScript'
+      - $ref: '#/definitions/CallScript'
+
+  ScriptDefinition:
+    type: object
+    allOf:
+      - $ref: '#/definitions/ExecutableDefinition'
+    required: [name]
+    properties:
+      name:
+        type: string
+      recommend:
+        type: string
+        enum: [standard, strict]
+
+  CodeScript:
+    type: object
+    unevaluatedProperties: false
+    anyOf:
+      - $ref: '#/definitions/ScriptDefinition'
+      - $ref: '#/definitions/CodeInstruction'
+
+  CallScript:
+    type: object
+    unevaluatedProperties: false
+    anyOf:
+      - $ref: '#/definitions/ScriptDefinition'
+      - $ref: '#/definitions/CallInstruction'
+
+  Documentable:
+    type: object
+    properties:
+      docs:
+        $ref: '#/definitions/Documentation'
+
+  Documentation:
+    unevaluatedProperties: false
+    oneOf:
+      - type: string
+      - type: array
+        items:
+          type: string
+
+  Function:
+    unevaluatedProperties: false
+    oneOf:
+      - $ref: '#/definitions/CodeFunction'
+      - $ref: '#/definitions/CallFunction'
+  
+  FunctionDefinition:
+    type: object
+    required: [name]
+    properties:
+      name:
+        type: string
+      parameters:
+        type: array
+        items:
+          $ref: '#/definitions/ParameterDefinition'
+      docs:
+        type: string
+  
+  ParameterDefinition:
+    required: [name]
+    unevaluatedProperties: false
+    properties:
+      name:
+        type: string
+      optional:
+        type: boolean
+
+  CodeFunction:
+    type: object
+    unevaluatedProperties: false
+    allOf:
+      - $ref: '#/definitions/FunctionDefinition'
+      - $ref: '#/definitions/CodeInstruction'
+
+  CallFunction:
+    type: object
+    unevaluatedProperties: false
+    allOf:
+      - $ref: '#/definitions/FunctionDefinition'
+      - $ref: '#/definitions/CallInstruction'
+
+  CodeInstruction:
+    type: object
+    required: [code]
+    properties:
+      code:
+        type: string
+      revertCode:
+        type: string
+
+  CallInstruction:
+    type: object
+    required: [call]
+    properties:
+      call:
+        $ref: '#/definitions/FunctionCalls'
+
+  FunctionCalls:
+    unevaluatedProperties: false
+    oneOf:
+      - $ref: '#/definitions/FunctionCall'
+      - type: array
+        items:
+          $ref: '#/definitions/FunctionCall'
+
+  FunctionCall:
+    type: object
+    required: [function]
+    unevaluatedProperties: false
+    properties:
+      function:
+        type: string
+      parameters:
+        $ref: '#/definitions/FunctionCallParameters'
+
+  FunctionCallParameters:
+    type: object
+    unevaluatedProperties: true
+    additionalProperties:
+      type: string
diff --git a/src/application/collections/README.md b/src/application/collections/README.md
new file mode 100644
index 00000000..ff7d600f
--- /dev/null
+++ b/src/application/collections/README.md
@@ -0,0 +1,13 @@
+# Collections
+
+This directory contains the **collection files**, which are the central source of truth for scripts and categories within privacy.sexy.
+
+In addition to the collection files, this folder contains two special files:
+
+- [`.schema.yaml`](./.schema.yaml): Provides the schema definition for collection files.
+- [`collection.yaml.d.ts`](./collection.yaml.d.ts): Defines TypeScript typings for the collection files.
+
+## Additional documentation
+
+- Refer to [`collection-files.md`](./../../../docs/collection-files.md) for details on the structure of these files.
+- To validate these files, use the `validate-collections-yaml` script. For instructions, see its [`README.md`](./../../../scripts/validate-collections-yaml/README.md).
diff --git a/src/application/collections/collection.yaml.d.ts b/src/application/collections/collection.yaml.d.ts
index 952b067f..12facc87 100644
--- a/src/application/collections/collection.yaml.d.ts
+++ b/src/application/collections/collection.yaml.d.ts
@@ -16,7 +16,7 @@ declare module '@/application/collections/*' {
   }
 
   export type ExecutableData = CategoryData | ScriptData;
-  export type DocumentationData = ReadonlyArray<string> | string | undefined;
+  export type DocumentationData = ReadonlyArray<string> | string;
 
   export interface DocumentableData {
     readonly docs?: DocumentationData;
@@ -73,7 +73,6 @@ declare module '@/application/collections/*' {
 
   export interface ScriptingDefinitionData {
     readonly language: string;
-    readonly fileExtension: string;
     readonly startCode: string;
     readonly endCode: string;
   }
diff --git a/src/application/collections/linux.yaml b/src/application/collections/linux.yaml
index fe9f4184..bc5690c5 100644
--- a/src/application/collections/linux.yaml
+++ b/src/application/collections/linux.yaml
@@ -1,4 +1,8 @@
+# yaml-language-server: $schema=./.schema.yaml
+# ↑ Adds a schema support in VS Code for auto-completion and validation.
+
 # Structure is documented in "docs/collection-files.md"
+
 os: linux
 scripting:
     language: shellscript
diff --git a/src/application/collections/macos.yaml b/src/application/collections/macos.yaml
index 81a8ce19..dfb9f6ff 100644
--- a/src/application/collections/macos.yaml
+++ b/src/application/collections/macos.yaml
@@ -1,4 +1,8 @@
+# yaml-language-server: $schema=./.schema.yaml
+# ↑ Adds a schema support in VS Code for auto-completion and validation.
+
 # Structure is documented in "docs/collection-files.md"
+
 os: macos
 scripting:
     language: shellscript
diff --git a/src/application/collections/windows.yaml b/src/application/collections/windows.yaml
index 44d3dc49..e23a8018 100644
--- a/src/application/collections/windows.yaml
+++ b/src/application/collections/windows.yaml
@@ -1,4 +1,8 @@
+# yaml-language-server: $schema=./.schema.yaml
+# ↑ Adds a schema support in VS Code for auto-completion and validation.
+
 # Structure is documented in "docs/collection-files.md"
+
 os: windows
 scripting:
     language: batchfile
diff --git a/tests/unit/application/Parser/ScriptingDefinition/ScriptingDefinitionParser.spec.ts b/tests/unit/application/Parser/ScriptingDefinition/ScriptingDefinitionParser.spec.ts
index ab54700f..df35a4fa 100644
--- a/tests/unit/application/Parser/ScriptingDefinition/ScriptingDefinitionParser.spec.ts
+++ b/tests/unit/application/Parser/ScriptingDefinition/ScriptingDefinitionParser.spec.ts
@@ -21,7 +21,7 @@ describe('ScriptingDefinitionParser', () => {
       const expectedAssertion: ObjectAssertion<ScriptingDefinitionData> = {
         value: data,
         valueName: 'scripting definition',
-        allowedProperties: ['language', 'fileExtension', 'startCode', 'endCode'],
+        allowedProperties: ['language', 'startCode', 'endCode'],
       };
       const validatorStub = new TypeValidatorStub();
       const context = new TestContext()
diff --git a/tests/unit/application/collections/NoUnintentedInlining.spec.ts b/tests/unit/application/collections/NoUnintentedInlining.spec.ts
index 179ca633..27c13638 100644
--- a/tests/unit/application/collections/NoUnintentedInlining.spec.ts
+++ b/tests/unit/application/collections/NoUnintentedInlining.spec.ts
@@ -72,6 +72,7 @@ function createTestCases(collectionsDirFromRoot: string): ITestCase[] {
     throw new Error(`Could not find any collection in ${collectionsDir}`);
   }
   const collectionFilePaths = fileNames
+    .filter((name) => !name.startsWith('.'))
     .filter((name) => name.endsWith('.yaml'))
     .map((name) => join(collectionsDir, name));
   return collectionFilePaths.map((path) => ({
diff --git a/tests/unit/shared/Stubs/CollectionDataStub.ts b/tests/unit/shared/Stubs/CollectionDataStub.ts
index 93a329c7..d5517183 100644
--- a/tests/unit/shared/Stubs/CollectionDataStub.ts
+++ b/tests/unit/shared/Stubs/CollectionDataStub.ts
@@ -47,7 +47,6 @@ export function getCategoryStub(scriptPrefix = 'testScript'): CategoryData {
 
 function getTestDefinitionStub(): ScriptingDefinitionData {
   return {
-    fileExtension: '.bat',
     language: ScriptingLanguage[ScriptingLanguage.batchfile],
     startCode: 'start',
     endCode: 'end',
diff --git a/tests/unit/shared/Stubs/ScriptDataStub.ts b/tests/unit/shared/Stubs/ScriptDataStub.ts
index d6c7d54a..bdcb8702 100644
--- a/tests/unit/shared/Stubs/ScriptDataStub.ts
+++ b/tests/unit/shared/Stubs/ScriptDataStub.ts
@@ -19,7 +19,7 @@ export function createScriptDataWithCall(
   } else {
     instance = instance.withMockCall();
   }
-  return instance;
+  return instance as ScriptDataStub & CallScriptData;
 }
 
 export function createScriptDataWithoutCallOrCodes(): ScriptDataStub {
@@ -50,12 +50,12 @@ class ScriptDataStub implements CallScriptData, CodeScriptData {
     return this;
   }
 
-  public withCode(code: string): this {
+  public withCode(code: string): this & CodeScriptData {
     this.code = code;
     return this;
   }
 
-  public withRevertCode(revertCode: string | undefined): this {
+  public withRevertCode(revertCode: string | undefined): this & CodeScriptData {
     this.revertCode = revertCode;
     return this;
   }