SourceShelf

SourceShelf is a web + desktop knowledge management app that forces every saved note, claim, or summary to stay tied to its original source. Instead of building another “second brain” full of orphaned snippets, it captures web pages, PDFs, and internal docs, then lets you highlight, annotate, and create “claims” that always link back to the exact paragraph, timestamp, or page. An AI layer can generate summaries and Q&A, but only from your stored sources, and it shows citations by default. It also tracks “knowledge decay”: if a source changes, disappears, or becomes outdated, SourceShelf flags your dependent notes and suggests what to re-check. Export is first-class (Markdown/JSON), because lock-in kills trust. This is realistic: it won’t replace Notion or Obsidian; it complements them by being the evidence-backed layer that prevents confident wrongness.