Never explain your
project twice.思簿
Spool remembers the details of everything you are working on.
Copy anything worth keeping — a good answer from an AI, a line in an email, a thought before it slips away. One key saves it under the right project, together with where it came from. Later, one click turns the whole project into text you can paste into any AI.
Free · macOS (Apple Silicon) · Works offline · No account · Nothing is tracked
Do the whole thing right here
Save three notes, pack them, then watch a brand-new AI chat pick up your project without being told anything. The content is written in advance; the steps are exactly what the app does.
An AI forgets your project the moment you close the tab, so you explain it again. And again. Meanwhile the details sit scattered across chats, emails and tabs you closed weeks ago. Spool keeps them in one place, so one paste brings any AI up to speed.
Save it, keep it, paste it
One key. Nothing to decide.
Copy anything, then tap ⌥ twice. It goes straight into the project you are working on, along with where it came from — down to the browser tab. A small note appears in the corner to confirm. The main window never opens, so you never lose your place or your train of thought.
⌘C, then ⌥⌥
The real thing: the lines you selected on the page, and Spool's note floating over the corner — what got saved, where it went, and undo.
A list, not a chat.
Everything you save stacks up in time order under one project. Two levels only — workspace, then project. No folders to build, no tags to pick, nothing to tidy up. Come back next week and the newest notes show you exactly where you stopped.
Acme is hiring a data analyst: SQL required, Python a plus.
Resume summary first, then the cover letter.
One click, ready to paste.
Spool writes the project out as plain text: your own words first, things you read kept as sources, anything an AI wrote marked so you can check it. Paste it into any AI — or just read it yourself to get back into the work.
The real Pack window: five notes become 3,899 characters of ready-to-paste text. Two choices, one button.
Three promises
Saving costs one key
If saving takes more than one key, people stop doing it. Every other decision in Spool follows from that one — no window to switch to, no box to fill in, no choice to make.
Nothing loses its source
Every note keeps its time and where it came from. Months later you can still tell what you decided yourself from what you simply read somewhere — and so can any AI you show it to.
AI helps, and signs its name
Connect the AI apps you already pay for. They can read, search and add notes, and every addition is signed. What you wrote by hand, no machine is allowed to change.
Quiet on purpose
Warm paper, one accent colour, no badges fighting for your attention. Spool stays out of the way until you have something to save.
One project, five notes: your goal, a job posting, an answer from an AI chat, your own decision, an email from the recruiter. Each one keeps its time and its source.
Packing a project: pick how much to include, copy, paste. Five notes become 3,899 characters of ready-to-paste text.
A finished project, boiled down to what it concluded and the notes that mattered.
Let your AI read your notes directly
A pack is one paste. With the Model Context Protocol, the AI apps you already use can open your notes whenever they need them: read weeks of context, search every project, and put what they find back in the right place. Ten tools, two switches you turn on yourself, and no server anywhere.
One plain question, and the AI reads your workspaces, projects and note counts straight off your Mac.
One paragraph built from notes you saved over three weeks, from four different places. This is the part a single paste cannot do.
Every result keeps its source: what you read somewhere, what an AI suggested, and what you decided yourself.
Ask it to file a conclusion and it writes one note — with a short reason, and a link to the note it builds on.
…and here it is inside Spool. Signed Claude · MCP, added below your note instead of over it, with the ↩ line pointing at the exact note it answers.
Screenshots were taken with a library built just for this, so nothing personal appears in them.
Everything stays on your computer.
- No account, no server — nothing is sent anywhere
- All your notes sit in one file on your Mac: copy it, back it up, or delete it
- The app is built so that it cannot reach the internet at all
- Notes only leave when your own AI app reads them, and only after you switch that on
The mark: a spool seen from above, with its thread pulling free.