Reorganize brain: projects/ top level, rename filenames, update homepage

- Moved everything from ideas/passepartout/ to projects/passepartout/
- Moved legal structures to projects/flags/
- Created missing _index.org files for all subdirectories
- Stripped redundant passepartout- prefix from filenames
- Rewrote root _index.org as generalized brain index (projects + concepts)
- Updated Hugo nav to Projects/Concepts
- Updated build script section descriptions
- Deleted stale ideas/passepartout-economics.md orphan

projects/passepartout/social-protocol/requirements-08-library.org

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+#+title: Social Protocol Requirements - 08: Library
+#+author: Amero Garcia
+#+created: [2026-03-16 Mon 14:28]
+#+DATE: 2026-03-14
+#+ID: agora-requirements-07-library
+#+STARTUP: content
+
+:PROPERTIES:
+:CREATED:  [2026-05-24 Sun]
+:ID:       df02cddc-944a-4bcd-8ef5-f080870d5f49
+:END:
+* Library
+
+** Concept
+
+The Library is a unified content archiving and media management system. It works like a unified *arr suite (Sonarr, Radarr, Readarr, etc.) that builds your personal libraries across all content types.
+
+** Supported Content Types
+
+- Video (movies, TV shows, educational content)
+- Audio (podcasts, music, audiobooks)
+- Photos (personal albums, professional portfolios)
+- Text (books, articles, documents)
+- Maps (geographic data, custom itineraries)
+- Physibles (physical object designs, 3D models)
+- Manufacturing Processes (recipes, procedures, blueprints)
+
+** Architecture
+
+The Library consists of three core components:
+
+*** Downloaders
+
+- Content acquisition tools that fetch media from various sources
+- Support for torrents, Usenet, direct downloads, and IPFS
+- Integration with content discovery networks
+- Automated quality selection and format conversion
+- Metadata fetching from external databases
+
+*** Indexers
+
+- Local search and categorization of library content
+- Full-text search across documents, subtitles, metadata
+- Tag-based organization (genre, year, creator, etc.)
+- Content deduplication via CID comparison
+- Integration with [[id:1d074690-a279-59cb-b91d-e9a22ae104ad][Social Protocol]]'s discovery layer for shared content
+
+*** Library Managers
+
+- Content organization and presentation interfaces
+- Unified browsing across all content types
+- Playlist and collection creation
+- Offline sync for mobile clients
+- Sharing controls (personal, collective, public)
+
+** Content Addressing
+
+All Library content is stored as CIDs:
+- Original files content-addressed for integrity
+- Metadata stored as separate Content Objects
+- Thumbnails and previews generated and addressed separately
+- Version history maintained via CID chains
+
+** Archiving
+
+*** Concept
+
+Archiving preserves Content Objects and open web content for long-term access, creating personal or collective knowledge repositories that outlive the ephemeral nature of streams.
+
+*** CID Content Archiving
+
+**** Personal Archives
+- Users can archive any CID-based content they have access to (public or decrypted)
+- Archive creates local copy with full CID verification
+- Archived Content Objects retain original metadata and provenance
+- Cross-references to related CIDs preserved
+
+**** Collective Archives
+- Library Collectives can curate themed archives (e.g., "Climate Science", "Digital Art History")
+- Distributed storage across multiple PDS nodes for redundancy
+- Version tracking as Content Objects are updated
+
+*** Open Web Archiving
+
+**** Web Archiver Tools
+- Archive any URL to content-addressed storage
+- WARC (Web ARChive) format support for fidelity
+- Text extraction for full-text indexing
+- Media extraction and separate CID addressing
+
+**** Link Rot Prevention
+- Replace dead links with archived CID versions
+- "Archive this" browser extension for one-click saving
+- Automatic archival of links referenced in user's content
+
+**** Archival Standards
+- Memento Protocol support for temporal negotiation
+- Archive verification via multiple sources (Wayback Machine, Archive.today, personal PDS)
+- Content authenticity via hash verification against original
+
+*** Integration with the Social Protocol
+
+- Library content can be referenced in posts, messages, and profiles
+- Content can be shared via Relays with appropriate encryption
+- Micro-payments for premium content access
+- Syndication to protocol-aware browsers and gateways
+
+** Requirements
+
+- The system MUST support unified content management across all media types.
+- The system MUST content-address all library items via CID.
+- The system MUST support local indexing for fast search.
+- The system MUST allow content sharing via the protocol's social layer.
+- The system MUST support offline access for synced content.
+- The system MUST integrate with the protocol's economic layer for paid content.
+
+** Related Documents
+
+- Protocol Unified Content Primitive
+- Protocol PDS & Relay Architecture