Fetches GitHub repository metadata (stars, watchers, forks) for a list of repos, computes deltas between runs, and appends to a CSV. The delta-tracking and idempotent CSV append pattern is reusable for any periodic GitHub metrics collector.

Renders a scrolling ticker SVG from repo ticker data, with declarative exclusion filters for owners, name substrings, exact names, and full names. The separation of filter logic from SVG rendering makes it adaptable to other ticker-style data displays.

Formats CSV rows into consistent markdown list entries with Shields.io badges, HTML escaping, and GitHub URL parsing. This is the core transformation for the awesome-list README and can be reused in any CSV-to-markdown pipeline that needs uniform entry formatting.

Adds, moves, and removes categories in config.yaml using line-oriented text splicing that preserves header comments and formatting. This is a reusable pattern for surgical YAML edits that must not clobber human-authored comments.

Provides category/subcategory lookups, parsing of composite dropdown values, and shared validation errors. It centralizes the rules for what categories are valid, making it reusable for issue-form validation, CSV validation, and README generation.