# GitHub · Change is constant. GitHub keeps you ahead. · GitHub · GitHub

> Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the largest open source community build software that advances humanity.

## Key Sections & Navigation
- [Homepage](https://github.com/): Primary entry point for GitHub · Change is constant. GitHub keeps you ahead. · GitHub · GitHub
- [Sign in](https://github.com/login): Canonical section on github.com
- [GitHubRepository hosting, code review, and collaboration](https://github.com/platform): Canonical section on github.com
- [CopilotAI coding agent for tasks, projects, and automated work](https://github.com/features/copilot): Canonical section on github.com
- [ActionsCI/CD and automation](https://github.com/features/actions): Canonical section on github.com
- [Code QualityQuality analysis, fixes, and enforcement](https://github.com/features/code-quality): Canonical section on github.com
- [CodespacesCloud development environments](https://github.com/features/codespaces): Canonical section on github.com
- [Code SecurityVulnerability detection and remediation](https://github.com/security/advanced-security/code-security): Canonical section on github.com
- [Secret ProtectionSecret scanning and leak prevention](https://github.com/security/advanced-security/secret-protection): Canonical section on github.com
- [All Features](https://github.com/features): Canonical section on github.com
- [Build with Copilot](https://github.com/features/ai): Canonical section on github.com
- [Integrations](https://github.com/marketplace): Canonical section on github.com
- [Trending repos](https://github.com/trending): Canonical section on github.com
- [GitHub Sponsors](https://github.com/open-source/sponsors): Canonical section on github.com
- [Developer articles](https://github.com/resources/articles): Canonical section on github.com
- [Enterprises](https://github.com/enterprise): Canonical section on github.com
- [Team](https://github.com/team): Canonical section on github.com

## Technical Architecture & Telemetry
- [AI Readiness & Token Footprint Dossier](https://sitecube.com/site/github.com): Verified `/llms.txt` manifest, AI crawler rules, and DOM token efficiency (131,504 raw HTML tokens compressed via Sitecube Hosted Mirror).