Igor

Core-first Bitrix / 1C-Bitrix / Битрикс / БУС / boxed Bitrix24 expertise. Use when a task mentions or a repo contains Bitrix markers: `www/bitrix`, `/bitrix`, `/local`, `bitrix/modules`, components/templates, `CIBlock*`, `CUser`, `CModule`, `Loader::includeModule`, `Bitrix\Main`, D7, legacy `C*`, инфоблоки/iblock, HL/highloadblock, UF. Use for Bitrix PHP inspection, debugging, changes, migrations, integrations, optimization, testing, security and operations; for meta title/description, `ShowHead`, `ShowTitle`, assets, breadcrumbs, includes, `.section.php`, project layout, `.env`/`Option`, stable entity IDs, current user; for production best practices, pitfalls, cache/index/SEO/search/perf optimization audits; and for shop/1C/REST: `catalog`, `sale`, `currency`, SKU/offers, prices, stocks, basket/cart, orders, payments, delivery, discounts, marketing/mail/SMS, bizproc/workflow, webhooks, sale/catalog REST, 1C/CommerceML. Inspect local core and `local/*`; missing optional modules are deferred.

The English summary is being prepared. Showing the original description.