This repository is a curated collection of over 3400 SVG icons for popular brands, maintained by the Simple Icons project. It is primarily a data repository, with the core assets being the SVG files in `icons/` and the structured metadata in `data/simple-icons.json`. The JSON schema defines brand title, hex color, source URL, guidelines, license, and aliases (including duplicates, localizations, and old names). The repository includes a comprehensive toolchain for managing and validating the icon set: scripts for adding/removing icons, formatting data, and running lint checks (custom linter `ourlint.js`, SVG linting via `svglint`, and JSON schema validation). A JavaScript SDK (`sdk.mjs`) provides utilities for accessing icon data, slug generation, and color normalization. The project is published as an npm package and also served via a CDN. While the primary purpose is data curation, the repository exhibits strong software engineering practices with automated CI/CD (GitHub Actions for release, label sync, issue management), pre-commit hooks, and extensive tests that validate every icon's properties. It is a hybrid of a data collection and a well-engineered toolset for maintaining that collection.