Kobo Auth

Owns the authentication lifecycle for tsundoku. Separated from the runtime kobo-library skill because login is a once-per-account event, while search/download is daily use.

This skill is stateful — its outcome is a credentials file on disk that other skills depend on.

When to Use

• Very first time using the toolkit (no credentials yet)
• kobo-library reports "auth required"
• Switching to a different Kobo account
• Migrating from a previous kobodl install (e.g. the legacy ~/KobodlLibrarySync/ shell script)
• Auditing or rotating credentials

Storage Layout (single root, per-platform subdirs)