l10n-sync

One English source of truth per format; this skill keeps its translations in sync with it:

• Markdown — README.md → the existing README_<LANG>.md files.
• JSON bundles — package.nls.json (project root) → the existing package.nls.<lang>.json siblings. Any flat X.json → X.<lang>.json family works the same way — e.g. VS Code's modern l10n/bundle.l10n.json → l10n/bundle.l10n.<lang>.json.

The script does all structure work (parsing, diffing, splicing, repairing, verifying); you do only the translation. plan picks the mode per file, automatically: