GitHub Copilot is no longer a single autocomplete tool. It is a suite of AI-powered features spanning inline code suggestions, chat interfaces in the IDE and on GitHub.com, automated code review, and agent-based workflows that can plan and execute multi-step tasks. The LFCS/GitHub exam tests the conceptual model: what Copilot is, how it integrates into…

The GitHub CLI (gh) is the official command-line interface for GitHub. It brings the platform’s core operations—repositories, issues, pull requests, Actions, releases—into the terminal, where they can be scripted, aliased, and composed. For the exam, the critical distinction is between gh and git: git manages the local repository and its history; gh manages the GitHub…

An organization is a shared account where businesses and open-source projects manage many repositories at once. It is not a user account and it does not own code directly—it owns repositories, and access to those repositories is granted to people and teams through a layered permission model. The LFCS/GitHub exam tests this hierarchy: organization roles…

GitHub provides two distinct static analysis security features: Secret Scanning, which detects leaked credentials in code and text, and CodeQL Analysis, which performs semantic code analysis to find vulnerabilities like SQL injection or cross-site scripting. A critical change occurred in May 2025: CodeQL no longer detects hardcoded secrets. Secret Scanning is now the sole mechanism…

Dependabot is not a single feature. It is three distinct mechanisms that share a common foundation: the dependency graph. Dependabot alerts notify you when a dependency in your project has a known vulnerability. Dependabot security updates automatically open pull requests to fix those vulnerabilities. Dependabot version updates keep dependencies current even when no vulnerability exists,…

GitHub Packages is a package hosting service integrated directly into GitHub. It provides registries for npm, RubyGems, Maven, Gradle, NuGet, and Docker/OCI container images. The container registry, GHCR (GitHub Container Registry), is the most widely used component because it stores Docker images alongside source code, links them to repositories, and authenticates through the same GITHUB_TOKEN…

A workflow that runs tests is continuous integration. A workflow that builds, tests, and deploys is continuous delivery. A workflow that deploys automatically on every merge to main is continuous deployment. GitHub Actions supports all three, but the difference between them is not the YAML syntax—it is the gates, environments, and conditions that separate one…

GitHub Actions is an automation platform built into GitHub. It runs workflows—a sequence of jobs and steps—in response to events like a push, a pull request, or a scheduled time. A workflow is defined in a YAML file inside .github/workflows/. The file names the triggers, defines the jobs, specifies the runner environment, and lists the…

A repository is more than a folder of code. It is a workspace with rules, workflows, and community expectations. GitHub defines a special directory, .github, where configuration files that shape the repository’s behavior live. The files inside this directory are not code—they are the contracts that govern how contributions are made, how issues are triaged,…