New bookmark source: Web feeds. Subscribe to any RSS (2.0 or 1.0), Atom, or JSON Feed URL — the format is detected automatically. The feed's current items appear as bookmarks and the list mirrors the feed on every sync; feed categories become tags.

New folder rule condition: Provider — collect everything from one source into a folder (picked from a dropdown of your configured sources), even when it has no tags.
"Latest" folder limit — show only the newest N matching items. Every source now syncs per-item dates to make this work.
Per-feed "maximum items" cap for feeds that ship a lot of entries.
Linkblog-friendly: JSON Feeds that point posts at an external article (e.g. Daring Fireball) can bookmark the linked page instead of the post.
Provider pages in the options now show how many links are synced and explain that feed items are a live list, not stored bookmarks.
Feeds in legacy encodings (e.g. ISO-8859-1) decode correctly.

Nested folder rules, JSON edit/export/import, options header (v1.1.0)

• Rules: groups nest arbitrarily (A AND (B OR C)); new NONE mode for
  exclusions. Old flat rules stay valid as-is — no migration. Empty
  groups never match, at any level (semantics table in CLAUDE.md).
• Recursive rule editor with + Add group; per-folder Edit as JSON with
  validation and inline errors (invalid JSON blocks Save).
• Export/import of all folder definitions as JSON (replace-all with
  confirm; bookmark_ids omitted on export, staged until Save).
• parseRuleGroup/parseFolders validators; getFolders now validates
  stored data instead of blind-casting.
• Options header: logo + version (from manifest), upper right.
• Two nested-rule demo folders: 'Community (not social media nor
  crowdsourcing)' = community AND NOT (social-media OR crowdsourcing),
  'Open knowledge' = knowledge AND (education OR opensource);
  membership pinned by unit test.
• Collapsed boolean-logic help on the Folders tab (∧/∨/¬, distribution,
  De Morgan).
• 13 new unit tests (36 total); UI verified headlessly against the
  built bundle.