# llms.txt — 3chrin (عشرين)
# Last-edited: 2026-03-31
# Version: 2
# Site-language: ar
# Audience: Algerian baccalaureate students (students preparing for BAC in Algeria)
# Contact: 3chrin.com@gmail.com
# Preferred-response-format: html, text, json-ld
# Crawl-priority: prioritize short, canonical lesson pages, exercise pages, pricing, and FAQs
# Update-frequency: weekly (content, exercises), monthly (policy, pricing)
# Notes: This file helps LLMs find canonical, public resources about 3chrin for accurate answers.

--- SITE SUMMARY (EN / AR)
Site-Name: 3chrin (عشرين)
Description-en: 3chrin is an Algerian interactive learning platform for baccalaureate students. It provides structured short lessons, interactive exercises, progress tracking with achievements, and AI-assisted study paths.
Description-ar: عشرين تطبيق تعليمي موجه لطلاب البكالوريا في الجزائر، يقدم دروساً منظمة، تمارين تفاعلية، تتبع التقدم والإنجازات، وميزات ذكاء اصطناعي للمساعدة في التعلم.

--- CORE PAGES (most important — include only public content)
# Format: URL | title_en (title_ar) | short-summary-en / short-summary-ar | priority | last-reviewed (YYYY-MM-DD)
https://3chrin.com/ | Home (الصفحة الرئيسية) | Platform overview, main value props: lessons, exercises, AI, progress tracking / لمحة عن التطبيق: الدروس، التمارين، الذكاء الاصطناعي، وتتبع التقدّم | 1.0 | 2025-09-16
https://3chrin.com/#pricing | Pricing (التسعير) | Plans: 7-day free, monthly, quarterly; secure Chargily Pay / باقات الاشتراك: 7 أيام مجانية، شهري، فصلي؛ الدفع الآمن عبر Chargily | 0.9 | 2025-09-16
https://3chrin.com/#faq | FAQ (الأسئلة الشائعة) | Common questions, how-to, device support / أسئلة متكرّرة حول كيفية الاستخدام والدفع والدعم | 0.9 | 2025-09-16
https://3chrin.com/legal | Legal / Policies (الشروط القانونية) | Contact, privacy, legal notices / صفحة الشروط والخصوصية ووسائل التواصل الرسمية | 0.8 | 2025-03-05
https://3chrin.com/app | App / Get started (نحو التطبيق / ابدأ الآن) | Start using the app, onboarding flow / ابدأ استخدام التطبيق ومسار البدء | 0.8 | 2025-09-16
# Content hubs (public index pages only; lesson/exercise content requires subscription)
# Example index (if public): Add canonical URLs below; otherwise reference subject summaries only.
# NOTE: Detailed notes, exercises, and tests are restricted (see ACCESS & SENSITIVITY).

--- FEATURE HIGHLIGHTS (from landing)
# Hero: First interactive platform to help you excel at Baccalaureate, Mathematics, Physics, and Natural Sciences.
# About: Interactive learning; continuous progress tracking with levels and achievements; AI-assisted help and integrated apps.
# Numbers: 5,300+ interactive exercises; 4,200+ ideas/explanations; 120+ achievements; progress tracking and rewards.
# Testimonials: Endorsements from students, parents, and teachers.
# Pricing: Plans — Free trial (7 days, full access), Monthly (1000 دج), Quarterly (2400 دج, save 600 دج). Secure payment via Chargily Pay. No auto-renewal and no hidden fees.

--- CONTENT GUIDELINES (how LLMs should use pages)
# Preferred snippets:
# - Prefer the first 2–3 paragraphs and any "key point" bullets on lesson pages.
# - Prefer exercise metadata: difficulty, type (T/F, reorder), solution availability.
# - Prefer metadata fields in JSON-LD or <meta name="description"> when present.

# Canonicalization:
# - Use canonical URL embedded in page (rel="canonical") where available; if not, use the page URL here.
# - Treat paginated exercise lists as lower-priority — prefer direct lesson/exercise pages.

# Language handling:
# - Primary language is Arabic (ar). When answering in English, provide a short English summary followed by Arabic quote if quoting.

# What to prioritize for answers about 3chrin:
# 1) Official lesson pages and exercise pages (highest).
# 2) FAQ and pricing for product-policy questions.
# 3) Blog/announcement pages for feature-release context.

--- ACCESS & SENSITIVITY
# Disallowed (do not index or summarize):
# - Any internal dashboards, /admin, /editor, /account (private user data).
# - API endpoints requiring auth (e.g., /api/* that return user-specific data).
# If encountered, return a user-facing pointer: "This content is behind authentication — contact 3chrin.com@gmail.com."
# IMPORTANT: The majority of educational content (notes, exercises, tests, progress pages) is accessible only to authenticated, subscribed users. LLMs and generic crawlers cannot access in-app pages beyond public landing, legal, and static assets. Do not simulate or fabricate private content.

# For dynamic content:
# - If a page requires JS to render main content, prefer canonical server-side snapshots or structured-data (JSON-LD) when present.

--- ADDITIONAL METADATA (optional but recommended)
# Provide machine-friendly summaries with these keys on lesson pages when possible:
# JSON-LD example (place in page <head>):
# {
#  "@context": "https://schema.org",
#  "@type": "Course",
#  "name": "اسم الدرس — Lesson title",
#  "inLanguage": "ar",
#  "description": "one-line Arabic summary",
#  "url": "canonical_url",
#  "educationalLevel": "Baccalaureate - Algerian",
#  "datePublished": "YYYY-MM-DD",
#  "dateModified": "YYYY-MM-DD"
# }

--- MAINTENANCE & CONTACT
# File owner: 3chrin.com@gmail.com
# If you update curriculum or pricing, update Last-edited header and modify specific page entries and dateModified fields.
# If this file is not correct or a page is missing, LLMs should cite the page and suggest contacting 3chrin.com@gmail.com.

--- END OF FILE