Glossary
What does this mean?
The files, protocols, and jargon that keep showing up in design and agent workflows, explained properly, with the parts people get wrong.
Updated 2026-09-09
What is AGENTS.md?
The instructions file coding agents read before they touch your repo.
What is CLAUDE.md?
Claude Code's project memory file, loaded at the start of every session.
What is SKILL.md?
A packaged procedure an agent loads only when the task calls for it.
What is DESIGN.md?
A design brief for coding agents so generated UI looks like your product.
What is MCP?
The standard that lets agents talk to outside tools and data without a custom plugin per model.
What is an OG image?
The preview picture other apps show when your link gets shared.
What are design tokens?
Named values for the smallest design decisions, shared across design and code.
What is a design system?
The shared source of truth for a product's interface, plus the rules for using it.
What is design-to-code?
Any workflow that turns a design into working UI code, from plugin exports to agents.
What is vibe coding?
Building software by prompting an agent and steering, instead of writing most of the code.