✨ Set up Copilot instructions

[priebera1]

Onboard this repo

You are the GitHub Copilot coding agent working in a TYPO3 v13 extension (lia_visualdiff). Produce small, reviewable PRs.

Project

• Purpose: visual diff QA for two bases (A,B). Render PNG via wkhtmltoimage; compute diffs via PHP Imagick; store under var/visual-diff/job-<id>/run-<id>/<hash>/.
• Languages: PHP 8.2+, TYPO3 13 (Extbase/Fluid).
• Key dirs: Classes/, Configuration/, Resources/Private/, var/visual-diff/.

Build & test

• Install: composer install
• Static: vendor/bin/phpstan analyse (if present)
• Style: vendor/bin/php-cs-fixer fix --dry-run (if present)
• Tests: vendor/bin/phpunit (if present)

Conventions

• PSR-12; keep public APIs stable; no Node/Chromium—use wkhtmltoimage only.
• Before PR: run static checks/tests; update docs when changing CLI/Scheduler.

Safety

• Never commit secrets. Use repo/environment secrets.
• Don’t touch CI/CD or branch protections.
• Keep blast radius small; prefer feature flags/configs.

Task guidance

• If a task is ambiguous: draft a plan in the PR description, then implement.
• Add acceptance criteria & update CHANGELOG when applicable.