Capture once, cite forever.
URLs, notes, quotes, files — all live in a shared Project library. Search by keyword or by meaning. Cite in one tap. Never lose a link again.
Why this matters
Research material lives everywhere — bookmarks, screenshots, Notion, paper notebooks, downloaded PDFs. By the time you remember you read something relevant, the link is gone. The Source Library fixes this by giving every Project a single, searchable home for everything you have ever read.
Four steps, no friction.
- 1
Add a source
Paste a URL, upload a PDF, or write a note. The Source Library pulls metadata — title, authors, year, abstract — automatically when it can.
- 2
Extract the facts and quotes
Mark up the parts that matter. Save quotes, facts, and figures as structured records attached to the source.
- 3
Search by keyword or meaning
Keyword search is instant. Semantic search uses embeddings to find sources that mean what you are asking, even if the words are different.
- 4
Cite in one tap
Drag a source — or just a quote from it — into your draft. The citation is generated in the style you choose.
What you get out of the box.
- Auto-extracted metadata for URLs (Open Graph, oEmbed, JSON-LD)
- PDF, EPUB, and plain-text upload with full-text indexing
- Per-source facts and quotes as structured records
- Keyword search plus semantic (vector) search
- Per-source tags, verified flag, and DOI lookup
- Cite in MLA, APA, Chicago, or custom format
Screenshot of the Contents Lab Source Library showing a list of sources with their facts and quotes.
Semantic search across the Project.
The problem. Keyword search forgets what you meant when you did not use the exact word.
The Contents Lab way. Every source is embedded into a 1,536-dim vector at write time. Ask "studies on slow reading" and you get sources about deep reading even if they never use the word "slow".
- Embeddings computed on the Lightbase edge — no per-request cost
- Hybrid mode combines keyword and semantic results, ranked by relevance
- Filters by tag, type, date, and verified status
Facts and quotes are first-class.
The problem. A "fact" buried inside a 4,000-word PDF is just as lost as the PDF itself.
The Contents Lab way. Lift facts and quotes out of a source into their own records. Search, tag, and cite them independently of the source they came from.
- Each fact or quote links back to its parent source
- Page numbers preserved for print sources
- A fact can be cited directly in your draft without re-opening the source
Try Capture once, cite forever today.
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