feat: Initialize MediaWiki project with accessibility-focused workflow

- Added package.json to manage project dependencies and scripts for initialization, setup, and accessibility testing.
- Created scripts for initializing MediaWiki, installing dependencies, and starting a development server.
- Implemented accessibility testing configurations using Pa11y and Lighthouse.
- Added configuration files for accessibility testing with Pa11y and Lighthouse.

.github/agents/accessibility-reviewer.agent.md

@@ -0,0 +1,22 @@
+---
+name: accessibility-reviewer
+description: Reviews MediaWiki changes for WCAG 2.1 AA conformance
+model: GPT-5.3-Codex
+tools:
+  - read_file
+  - grep_search
+  - semantic_search
+---
+
+You are an accessibility-focused code reviewer for this repository.
+
+Objectives:
+- Enforce WCAG 2.1 AA baseline for any UI or template change.
+- Treat AAA improvements as best-effort enhancements.
+- Return findings ordered by severity.
+
+When reviewing:
+1. Identify violations affecting keyboard, semantics, labels, focus, contrast, and error handling.
+2. Reference likely WCAG criteria in plain language.
+3. Propose concrete code-level fixes.
+4. Flag missing automated tests where relevant.

.github/instructions/accessibility.instructions.md

@@ -0,0 +1,26 @@
+---
+applyTo:
+  - "mediawiki/skins/**/*.mustache"
+  - "mediawiki/skins/**/*.css"
+  - "mediawiki/skins/**/*.less"
+  - "mediawiki/extensions/**/*.php"
+  - "mediawiki/extensions/**/*.js"
+---
+
+# Accessibility Rules For This Repository
+
+Treat WCAG 2.1 AA as required and AAA as best effort.
+
+## Required checks in code changes
+- Use semantic elements for page landmarks and structure.
+- Ensure all controls are keyboard operable.
+- Keep visible focus indicators.
+- Provide labels for form controls and clear error messages.
+- Keep meaningful alt text on informative images.
+- Avoid color-only communication.
+- Maintain AA contrast ratios for text and UI components.
+
+## Review behavior
+- Call out WCAG failures with exact remediation.
+- Prefer MediaWiki/Codex conventions over custom inaccessible patterns.
+- Recommend tests for any UI change that can regress accessibility.

.gitignore

@@ -0,0 +1,8 @@
+node_modules/
+mediawiki/
+composer.phar
+mediawiki/cache/
+mediawiki/images/
+mediawiki/vendor/
+mediawiki/LocalSettings.php
+.lighthouseci/

README.md

@@ -0,0 +1,57 @@
+# GPLX MediaWiki
+
+Local-first MediaWiki bootstrap for Windows with an accessibility-focused workflow.
+
+## Quick start
+
+1. Install prerequisites:
+
+- Git
+- Node.js 20+
+- PHP 8.1+ (XAMPP/WampServer or standalone)
+
+2. Install Node tooling:
+
+```bash
+npm install
+```
+
+3. Initialize MediaWiki core:
+
+```bash
+npm run mw:init
+```
+
+4. Install MediaWiki PHP dependencies:
+
+```bash
+npm run mw:deps
+```
+
+Or run both steps with one command:
+
+```bash
+npm run mw:setup
+```
+
+5. Start local dev server:
+
+```bash
+npm run dev
+```
+
+Then open: http://127.0.0.1:8080 and continue setup at /mw-config/index.php
+
+## Accessibility checks
+
+Run static/runtime checks against local pages:
+
+```bash
+npm run a11y:all
+```
+
+## Notes
+
+- This setup runs without Docker.
+- WCAG AA is the required baseline.
+- AAA improvements are tracked as best effort.

docs/ACCESSIBILITY_WORKFLOW.md

@@ -0,0 +1,33 @@
+# Accessibility Workflow
+
+## Policy
+
+- Baseline: WCAG 2.1 AA required
+- Stretch target: AAA where practical
+
+## Agent usage
+
+- Use repository instructions in .github/instructions/accessibility.instructions.md
+- Use dedicated reviewer in .github/agents/accessibility-reviewer.agent.md
+
+## Developer checklist
+
+- Keyboard-only interaction works for all interactive elements
+- Focus state remains visible in every state
+- Forms have programmatic labels and useful error hints
+- Landmarks and heading order are logical
+- Contrast meets AA ratios
+- Content is understandable without color cues alone
+
+## Tooling
+
+- Pa11y CI with WCAG2AA profile
+- Lighthouse accessibility scoring
+
+## Local command
+
+```bash
+npm run a11y:all
+```
+
+Run after any template, style, or interaction change.

docs/INSTALLATION_WINDOWS.md

@@ -0,0 +1,42 @@
+# Windows Installation (No Docker)
+
+## 1. Install prerequisites
+
+- Git
+- Node.js 20+
+- PHP 8.1+ with required extensions for MediaWiki
+- One database option:
+  - SQLite for fast local tests, or
+  - MariaDB/MySQL for production-like behavior
+
+## 2. Install project dependencies
+
+```bash
+npm install
+```
+
+## 3. Fetch MediaWiki source
+
+```bash
+npm run mw:init
+```
+
+Default branch is REL1_43 in scripts/mw-init.ps1. Adjust if needed.
+
+## 4. Start local server
+
+```bash
+npm run dev
+```
+
+Open http://127.0.0.1:8080 and complete the MediaWiki web installer.
+
+## 5. Save LocalSettings.php
+
+After installer completion, place generated LocalSettings.php in mediawiki/.
+
+## 6. Run accessibility checks
+
+```bash
+npm run a11y:all
+```

package.json

@@ -0,0 +1,22 @@
+{
+  "name": "gplx-mediawiki",
+  "private": true,
+  "version": "0.1.0",
+  "description": "Local MediaWiki project with accessibility-focused workflow",
+  "scripts": {
+    "mw:init": "pwsh -ExecutionPolicy Bypass -File ./scripts/mw-init.ps1",
+    "mw:deps": "pwsh -ExecutionPolicy Bypass -File ./scripts/mw-deps.ps1",
+    "mw:setup": "npm run mw:init && npm run mw:deps",
+    "dev": "pwsh -ExecutionPolicy Bypass -File ./scripts/dev.ps1",
+    "a11y:pa11y": "pa11y-ci --config ./tests/accessibility/pa11y.config.json",
+    "a11y:lighthouse": "lhci autorun --config=./tests/accessibility/lighthouserc.json",
+    "a11y:all": "npm run a11y:pa11y && npm run a11y:lighthouse"
+  },
+  "devDependencies": {
+    "@lhci/cli": "^0.14.0",
+    "pa11y-ci": "^3.1.0"
+  },
+  "engines": {
+    "node": ">=20"
+  }
+}

scripts/dev.ps1

@@ -0,0 +1,46 @@
+param(
+    [int]$Port = 8080,
+    [string]$HostName = "127.0.0.1"
+)
+
+$ErrorActionPreference = "Stop"
+
+function Resolve-PhpCommand {
+    $phpCommand = Get-Command php -ErrorAction SilentlyContinue
+    if ($phpCommand) {
+        return "php"
+    }
+
+    $candidates = @(
+        "D:\\xampp\\php\\php.exe",
+        "C:\\xampp\\php\\php.exe",
+        "C:\\wamp64\\bin\\php\\php8.3.0\\php.exe",
+        "C:\\wamp64\\bin\\php\\php8.2.0\\php.exe",
+        "C:\\wamp64\\bin\\php\\php8.1.0\\php.exe"
+    )
+
+    foreach ($candidate in $candidates) {
+        if (Test-Path $candidate) {
+            return $candidate
+        }
+    }
+
+    return $null
+}
+
+$php = Resolve-PhpCommand
+if (-not $php) {
+    Write-Error "PHP is not available in PATH and no common XAMPP/Wamp PHP executable was found. Install PHP or add php.exe to PATH."
+}
+
+if (-not (Test-Path "./mediawiki")) {
+    Write-Error "Missing ./mediawiki. Run 'npm run mw:init' first."
+}
+
+if (-not (Test-Path "./mediawiki/index.php")) {
+    Write-Error "./mediawiki does not look like a valid MediaWiki core directory."
+}
+
+Write-Host "Starting MediaWiki dev server at http://$HostName`:$Port"
+Write-Host "Use Ctrl+C to stop."
+& $php -S "$HostName`:$Port" -t "./mediawiki"

scripts/mw-deps.ps1

@@ -0,0 +1,63 @@
+$ErrorActionPreference = "Stop"
+
+function Resolve-PhpCommand {
+    $phpCommand = Get-Command php -ErrorAction SilentlyContinue
+    if ($phpCommand) {
+        return "php"
+    }
+
+    $candidates = @(
+        "D:\\xampp\\php\\php.exe",
+        "C:\\xampp\\php\\php.exe",
+        "C:\\wamp64\\bin\\php\\php8.3.0\\php.exe",
+        "C:\\wamp64\\bin\\php\\php8.2.0\\php.exe",
+        "C:\\wamp64\\bin\\php\\php8.1.0\\php.exe"
+    )
+
+    foreach ($candidate in $candidates) {
+        if (Test-Path $candidate) {
+            return $candidate
+        }
+    }
+
+    return $null
+}
+
+if (-not (Test-Path "./mediawiki/composer.json")) {
+    Write-Error "Missing ./mediawiki/composer.json. Run 'npm run mw:init' first."
+}
+
+$php = Resolve-PhpCommand
+if (-not $php) {
+    Write-Error "PHP executable not found. Install XAMPP/WampServer or add php.exe to PATH."
+}
+
+if (-not (Test-Path "./composer.phar")) {
+    Write-Host "Downloading Composer locally (composer.phar)..."
+    & $php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
+    if (-not (Test-Path "./composer-setup.php")) {
+        Write-Error "Could not download Composer installer."
+    }
+    & $php .\composer-setup.php --filename=composer.phar
+    Remove-Item .\composer-setup.php -ErrorAction SilentlyContinue
+}
+
+Write-Host "Checking required PHP extensions..."
+$loadedExtensions = (& $php -m) | ForEach-Object { $_.Trim().ToLower() }
+$requiredExtensions = @("intl")
+$missing = @()
+
+foreach ($ext in $requiredExtensions) {
+    if ($loadedExtensions -notcontains $ext) {
+        $missing += $ext
+    }
+}
+
+if ($missing.Count -gt 0) {
+    Write-Error "Missing PHP extension(s): $($missing -join ', '). Enable them in php.ini and restart dev server."
+}
+
+Write-Host "Installing MediaWiki Composer dependencies..."
+& $php .\composer.phar --working-dir=mediawiki install --no-dev --prefer-dist --optimize-autoloader
+
+Write-Host "MediaWiki dependencies are installed."

scripts/mw-init.ps1

@@ -0,0 +1,17 @@
+param(
+    [string]$Branch = "REL1_43",
+    [string]$RepoUrl = "https://gerrit.wikimedia.org/r/mediawiki/core.git"
+)
+
+$ErrorActionPreference = "Stop"
+
+if (Test-Path "./mediawiki") {
+    Write-Host "mediawiki directory already exists. Skip clone."
+    exit 0
+}
+
+Write-Host "Cloning MediaWiki branch $Branch..."
+git clone --depth 1 --branch $Branch $RepoUrl mediawiki
+
+Write-Host "MediaWiki source ready in ./mediawiki"
+Write-Host "Next: run 'npm run dev' to start local server."

tests/accessibility/lighthouserc.json

@@ -0,0 +1,24 @@
+{
+  "ci": {
+    "collect": {
+      "numberOfRuns": 1,
+      "url": [
+        "http://127.0.0.1:8080/",
+        "http://127.0.0.1:8080/index.php/Main_Page"
+      ]
+    },
+    "assert": {
+      "assertions": {
+        "categories:accessibility": [
+          "warn",
+          {
+            "minScore": 0.9
+          }
+        ]
+      }
+    },
+    "upload": {
+      "target": "temporary-public-storage"
+    }
+  }
+}

tests/accessibility/pa11y.config.json

@@ -0,0 +1,11 @@
+{
+  "defaults": {
+    "standard": "WCAG2AA",
+    "timeout": 60000,
+    "wait": 1000
+  },
+  "urls": [
+    "http://127.0.0.1:8080/",
+    "http://127.0.0.1:8080/index.php/Main_Page"
+  ]
+}