How to save what you learn in ChatGPT and Claude, so you can find it again

You asked ChatGPT something useful in March. It explained a thing that had confused you for years, and it made sense. Now it is October, and you need it again. Was it in the chat about taxes, or the one about your pension? You scroll, you search, and you give up and ask again.

That is the most common way good AI answers get lost. Not because they were bad, but because a chat is a place to think, and nobody goes back to read old chats.

This guide shows a simple habit that fixes it: at the moment you learn something, ask the AI to keep the essence as a short note in your notes app. We make Capacities and use it in the examples. The habit works with any notes app.

The short answer

Do not save chats. Save what you learned from them.

When a chat gives you something worth keeping, say "save this as an atomic note". With Capacities connected and the skill added, ChatGPT or Claude writes the note for you, the same way every time. Without a connection, ask for the note and copy it into your notes app. Once a week, spend five minutes looking at what you saved.

Why chat history is a poor place to keep things

• It is sorted by date. Your chats are a long list, newest first. Three chats about the same project sit weeks apart between recipes and travel plans.
• The titles are not yours. The app names each chat from the first message. "Quick question" does not help you find anything in six months.
• The good part is buried. The useful answer is one reply in a long back-and-forth. One person on r/ChatGPT put it simply: "Bookmarks don't help because they save the whole page, not the exact response."
• Memory chooses for you. ChatGPT's memory "does not retain every detail from every conversation. ChatGPT decides which available information is relevant." Claude's memory is a summary it rewrites every day. Neither keeps your insight as a page you can open.
• It is stuck in one app. What you learned in ChatGPT is not there when you open Claude, and the other way around.

What people try, and where it breaks

All of these save the conversation. The conversation is not what you need later. You need the conclusion.

Keep the essence, not the transcript

People who take notes seriously have a name for this: an atomic note. One idea per note, written short, with a title that says the idea.

In a thread on r/PKMS about capturing knowledge from AI chats, the top answer said: "I used to save whole chats and never look at them again… don't store chats, store decisions." Another said: "anything important gets processed into atomic notes."

A good saved note has five parts:

1. A title that states the idea. "Index funds beat most stock pickers after fees", not "Investing chat".
2. The core idea in a few sentences. Written so it makes sense without the chat. Enough to remember, short enough to read in ten seconds.
3. The details worth keeping. The why, the how, an example, the key numbers. Not the back-and-forth.
4. Where it came from. A link to the book, podcast, or article that started the conversation, if there was one.
5. One to three tags you already use. So the note sits next to everything else you know about the topic.

The AI is good at writing the first three. You are the one who knows the fourth, so a good assistant asks. The fifth is where things go wrong most often: an AI that makes up a tag like "Sleep science" next to your existing "Sleep" splits your notes in two. The skill at the end handles both.

The routine, step by step

This is how it works in Capacities. The idea carries over to any notes app.

1. Connect your AI once

Add Capacities to ChatGPT from the plugin directory, or to Claude from the connector directory, and sign in. It takes about a minute. See connect ChatGPT or connect Claude.

2. Say "save" at the moment you learn something

Do not wait until the end of the chat, and do not plan to do it later. When something clicks, ask for the note. With the skill, "save this as an atomic note" or "keep this" is enough.

::chat-to-note

app: claude prompt: That finally makes sense. Save the essence as an atomic note in Capacities, tagged Sleep. reply: 'Saved "Caffeine after 2 pm cuts deep sleep, even if you fall asleep fine" as an atomic note, with four points, and tagged it Sleep. It''s also in today''s note.' noteLabel: Created in Capacities noteType: Atomic note noteIcon: i-ph-lightbulb-duotone noteColor: amber noteTitle: Caffeine after 2 pm cuts deep sleep, even if you fall asleep fine lines:

• Caffeine has a half-life of about 5 to 6 hours
• Falling asleep is not the same as sleeping deeply
• 'Why it matters: my 4 pm coffee and tired mornings'
• Tagged Sleep, linked to today's note caption: One idea, a title that says it, and a link to where it belongs.

::

3. Let today's note catch it

If you do not know where something belongs, say "save it to today's note". Capacities has a daily note for every day, and every note you create is linked to the day you made it. Nothing needs a folder first.

4. Look at the week once

Once a week, open the last seven daily notes. It takes five minutes. Delete what turned out not to matter. Link what belongs together. Turn a note into a proper type when it is clearly a book, a recipe, or a person.

5. Ask your notes before you ask the internet

The next time the topic comes up, start with "What do I know about this already?" Your assistant searches your notes first and builds on what you saved, instead of starting from zero.

Who this is not for

• If you rarely learn anything new from AI chats, you do not need a system. Pin the occasional chat.
• If you need the full transcript, for example for work records, use the export in your chat app's settings.
• If you do not want to use a connector, the habit still works with copy and paste into any notes app.

The skill: save the essence as an atomic note

A skill is a set of instructions your assistant loads when a task matches. ChatGPT and Claude both support skills, and they read the same format: a folder with a SKILL.md file. You add it once. From then on, "save this as an atomic note" or "keep this" is enough, and the note comes out the same way every time.

This skill is a short version of the one we use ourselves. It does five things a plain "save this" does not:

• It asks where the idea came from: a book, a podcast, an article, or nothing. Only you know, and the link to the source is often the most useful part of the note.
• It links to the exact title of that source in your space, so the link never creates an empty page.
• It uses only tags you already have, and suggests a new one instead of creating it.
• It writes the title as the idea, and keeps the body short.
• It replies with a link that opens the note in the Capacities desktop app.

::chat-to-note

app: chatgpt prompt: Save the essence of this as an atomic note. reply: 'Where did this come from: a book, a podcast, an article, or no source? … Found your book "Material World" and the tags Physics and Energy. Saved: Solar cells need ultra-pure monocrystalline silicon.' noteLabel: Created in Capacities noteType: Atomic note noteIcon: i-ph-lightbulb-duotone noteColor: amber noteTitle: Solar cells need ultra-pure monocrystalline silicon lines:

• 'Core idea: impurities trap the electrons that carry the current'
• Purity of 99.9999% or more, grown as one crystal
• 'Tags: Physics, Energy, both already in the space'
• 'Source: Material World' caption: The assistant asked for the source, found the book, and used tags that already existed.

::

What you need

• Capacities Pro, with Capacities connected to ChatGPT or Claude.
• An Atomic note type in your space. Add it from the Object Studio gallery. Without it, the skill offers to save a Page instead.

Add it to ChatGPT or Claude

1. Create a folder called capacities-atomic-note.
2. Copy the skill below into a text file in that folder, and name the file SKILL.md.
3. Zip the folder.
4. Upload the ZIP:
   • ChatGPT: open Plugins in the sidebar, then the Skills tab. Select Create, then Upload from your computer.
   • Claude: open Customize, then Skills. Select the plus button, then Create skill, then Upload a skill. Turn the skill on. Skills in Claude need code execution to be turned on.

Claude Code, Cursor, and Codex read the same folder from their skills directory. The AI second brain guide has the paths.

The skill

---
name: capacities-atomic-note
description: Save one idea from the conversation as a self-contained Atomic note in the user's Capacities space, tagged only with existing tags and linked to its source. Use when the user says "save this as an atomic note", "keep this", or asks to save an insight from the chat to Capacities.
---

# Capacities atomic note

Turn one idea from the conversation into one Atomic note in the user's
Capacities space.

The user keeps a curated knowledge graph. Two mistakes damage it:

- Tags created by accident. A near-duplicate like "Photovoltaics" next to
  an existing "Solar energy" splits the graph.
- Links to an empty object, because the title did not match exactly.
  Most of this workflow exists to avoid those two mistakes.

## Tools

Use the Capacities connector. If its tools are not loaded yet, search for
them by description ("Capacities search objects", "Capacities create
object") before you start.

If the space has no Atomic note type, say so, and offer to save a Page
instead.

## Workflow

1. Ask where the idea came from, in one short question: a book, podcast,
   article, person, or no source? Skip this if the user already said.
   Ask even when it seems obvious. Only the user knows the source.

2. Find the source. Search Capacities for its title, with an objectType
   filter such as "Book" if you know the type.
   - One clear match: use its title exactly as returned.
   - Several or fuzzy matches (typos, dictation errors): show them and ask.
   - No match: ask whether to link anyway, which creates a new empty
     object, or to leave the link out.

3. Pick tags from existing tags only. Search with objectType "Tag" several
   times: the broad field, related fields, and synonyms, in every language
   the space uses. Pick 1 to 3 that fit, and use their exact titles.
   Never invent a tag: [[New tag]] in the tags property silently creates
   one. Create a tag only when the user asks. If nothing fits, use no tags
   and suggest one in your reply.

4. Write the note. Atomic means one idea that makes sense without this
   conversation. Write in the language of the conversation.
   - Title: the idea as a statement, not a topic. "Solar cells need
     ultra-pure monocrystalline silicon", not "Silicon".
   - description: one sentence on what the note covers.
   - Body: short, scannable Markdown. "## Core idea" in 2 to 4 sentences,
     then 1 to 3 short sections with the why, how, examples, or numbers,
     and an optional one-line takeaway. Keep facts, mechanisms, and
     numbers. Drop the chat. Do not repeat the title as a heading.
   - If the conversation holds several ideas, ask whether the user wants
     one note or several linked notes.

5. End the body with the source: a line with three dashes, then one line
   such as "Source: [[Material World]]", with the exact title from step 2.
   Fit the words to the source: "Heard on [[Podcast]]", "From [[Article]]".

6. Create the note. Call getObjectTypeShape("Atomic note"), then
   createObjectViaMD with the property keys it returned. Set every property
   in that one call. Keep the object ID it returns. If there is none,
   search for the exact title with objectType "Atomic note".

7. Get a link that opens the app. Call createObjectLink with the note's ID.
   It returns https://app.capacities.io/<spaceId>/<objectId>. Replace
   https://app.capacities.io/ with capacities:// and show it as a Markdown
   link with the note title as the text. Do this for every note you created
   or changed. If you cannot get a link, say so and give the exact title.

## Reply

Keep it short. The link comes first:

Saved: [Solar cells need ultra-pure monocrystalline silicon](capacities://<spaceId>/<objectId>)
Tags: Physics, Energy · Source: Material World
Suggested new tag: none

Make it yours

The skill is plain text, so change it to fit how you take notes:

• Why it matters to you. Add a line to step 4: "End with one sentence on why this matters to me."
• Your own headings, in your language. Replace "Core idea" with the headings you use.
• Today's note. Add a step that also links the new note from today's daily note.
• Decisions and how-tos. Copy the skill and change the type, for example a "Decision" note with what you decided and what you ruled out, or a checklist page called "How to task".

How we wrote this guide

• We make Capacities. Features described here come from our docs.
• Quotes from Reddit are verbatim, from public threads in r/ChatGPT and r/PKMS.
• Facts about memory come from OpenAI's and Anthropic's help pages, read in October 2026.
• The skill uses the tools our connector exposes today. How to add a skill comes from the help pages of ChatGPT and Claude, read in October 2026.
• If something here is wrong, email [email protected].