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Cosmic Dolphin
Summaries that name their sources

Save a link.
Get it back when it matters.

Cosmic Dolphin reads what you save, summarises it, files it, and puts it in front of you again when it's useful. A calm library for everything you meant to read.

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Cosmic Dolphin
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Library
All saves148
Inbox9
Read later34
Collections
Agents & memory17
Typography14
Product strategy26
Retrieval21
every.to/chain-of-thought/the-memory-problemSave
Library
All saves
The memory problem nobody is benchmarking

Summarising…

  1. Fetched page
  2. Extracted content
  3. Summarising…
  4. Filing into a collection

How it works

A quiet layer between you and everything you meant to read.

01Capture

Paste once. It’s handled.

Drop any link into the omnibox. It becomes a row in your library straight away, and you can watch it being read, summarised and filed — no spinner, no waiting room, no fake percentage.

stratechery.com/2026/the-cost-of-a-perfect-index
stratechery.comjust now
The cost of a perfect index

Filing into a collection

  1. Fetched page
  2. Extracted content
  3. Summarising…
  4. Filing into a collection
retrieval
cost

02Cosmic brief

A summary you can check.

Every brief is a few sentences and the points worth keeping, and every one names the page it was written from. When a summary can’t be trusted, it says so instead of guessing.

Cosmic brief11 min article

Two decades of eye-tracking agree on less than the discourse claims: line length and leading matter, but the paragraph — not the line — is the unit readers actually budget attention by.

  • Measure. Comprehension holds from 45 to 75 characters.
  • Paragraphs. Readers skip by block, not by line.
alistapart.comsummarised from the full article

03Filing

Filed for you. Overruled by you.

As your library grows, Cosmic proposes collections for what belongs together. Rename them, drag a save somewhere else, and it stays where you put it — nothing you filed by hand gets moved again.

Collections
Agents & memory17
Typography14
Product strategy26
Suggestion

9 saves look like a new collection: Reading interfaces

Create collectionNot now

Built to be finished, not scrolled.

Ranked for usefulness
Home orders what you’re likely to finish and come back to — never what’s most liked.
Your library is yours
No likes, counts or audience on what you save. Share a single save when you choose to.
Sources, always
Nothing Cosmic writes ships without naming where it came from, one click from the original.

Start the library you’ll actually read.

Paste your first link. Everything after that, Cosmic handles.

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