vibe-coding-fundamentals

Vibe Coding is a methodology where you describe intent in natural language and Copilot Agent Mode writes, tests, and iterates the code. Agent Mode reads multiple files, understands project context, and executes complex multi-step tasks autonomously.

Use four layers: copilot-instructions.md for global behavior, AGENTS.md for project rules, .github/skills/ for domain knowledge in SKILL.md files, and .github/agents/ plus .github/prompts/ for specialized executors and reusable task recipes.

Chat Mode answers questions with limited context from what you type. Agent Mode reads multiple files, creates or modifies code across the project, and executes iterative actions with full project context.

Create a directory under .github/skills/ containing a SKILL.md file with YAML frontmatter defining name and description, followed by structured Markdown sections with instructions and examples for the specific domain.

Use agents like a planner, coder, or reviewer for complex multi-step SDLC tasks requiring autonomous execution. Use prompts for recurring single-purpose tasks such as creating a program or updating documentation.

Vibe Coding still requires reviewing and testing all generated code, providing clear context, and following project conventions. Vague descriptions or blindly trusting output without validation leads to incorrect results.