Use when coordinating multiple Humanizer locale parity efforts across isolated worktrees, branches, PRs, review/CI babysitting, merges, and cleanup. This is the parent orchestration skill for locale batches; delegate each individual locale to add-locale rather than implementing locale details directly.
Use when adding a new Humanizer locale or bringing an existing shipped locale to full parity. Trigger when work touches src/Humanizer/Locales, localization registries, shared locale engines, or culture-specific localization tests, and the locale must end with intentional coverage for every shipped localized surface with no English fallback, unsupported-locale gaps, or partial completion.