My AI Partner · Part Two

Last time, we had AI act as a "thinking partner". This time, let's talk about where those teased-out ideas should go — into a web chat, into AI notes, or into an agent?

Once the Session Ends, Where Do the Ideas Go?

Last time, I got into the habit of letting AI argue the opposing side and walk through a hard problem before any real conversation began.

The more I used it, the more I noticed a new problem: those rounds of follow-up questioning often brought a few very good ideas to the surface. Some were patched in after I got stuck; others I happened to say out loud and filed away at the time as “come back to this later”.

But the moment the conversation closed, they were essentially gone.

A web chat is very good at helping me think in the moment, but not so good at helping me keep. The next day, all I remembered was “we hit on a good point yesterday” — and what exactly it was, I simply could not recall.

Only later did I realise that “helping me think” and “helping me keep” are two different things — and that behind them stand three different kinds of tools.

What an idea fears most is not failing to be thought of, but being thought of and then finding nowhere to catch it.

Three Kinds of Tools, Each Doing Its Own Job

I roughly sorted the AI scenarios I use every day into three kinds. They do not replace one another; each handles one stretch.

First: web chat. This is ChatGPT, Claude, Gemini, or domestic ones like DeepSeek, Kimi and Doubao that you can talk to just by opening a page. Its strength is immediacy and divergence — you throw in a vague question and it thinks along with you. Last time's “thinking partner” lives in this category.

Its weakness is just as plain: it is organised by conversation, and once you leave, it is gone. Three months on, it is very hard to flip back to one crucial sentence.

Second: AI notes. Their focus is not on “chatting” but on “keeping”. Once an idea is recorded, it can be searched, connected, and organised into something else. They suit what you want to keep and will look back at later.

Third: agent tools. What they excel at is “doing” — running a multi-step task to completion on their own: looking things up, writing code, calling APIs. They are powerful, but far too heavy for “a fleeting thought”. You would not launch an agent just to note down a sentence.

Three tools, three jobs

  • Web chat helps you think through a question in the moment, but an idea may disappear when the session ends.
  • AI notes help capture, search, connect and organize ideas so you can return to them.
  • Agents carry out multistep tasks such as research, writing code or calling APIs. Mixing these jobs often makes a workflow feel awkward.

Web chat helps you think, AI notes help you keep, agents help you do. Mixing them up is often why the way we work feels awkward.

How That Loose Idea Would Have Vanished

Of the three, the most underrated is the second. Because “helping me think” has a strong presence, while “helping me keep” is very quiet.

Say I am halfway through a meeting and I suddenly think of a point unrelated to the current topic but one I do not want to lose. In the past I had only two choices: interrupt my train of thought to note it down, or gamble that I would still remember it later. Usually it was the latter — and then I forgot it.

Before and after

  • Before: a thought arrives and drifts away because the current task cannot be interrupted.
  • After: the thought is captured immediately and can be revisited in context.

Most good ideas are not rejected; they are lost to timing — you happen to be busy with something else.

Once Caught, It Can Keep Moving Forward

This is why I built one myself, called EchoMind — a local-first, open-source notebook for ideas. I built it, in fact, because I kept being troubled by that very “thought of it and then forgot” problem described above. I use it as an example not because it is polished (it is still very young, and I am looking for people to test it with me), but because it handles “helping me keep” fairly completely, which makes it a good way to explain what this kind of tool actually does; swap in another tool of the same kind, and the thinking is much the same.

For me, what is truly useful is not the number of features, but three moments.

One: capture without interrupting. Think it, note it — no switching windows, no first deciding which folder it belongs in. The lighter this step, the more willing I am to keep even half a sentence.

Two: it digs up similar past ideas for me. When I record a new one, it nudges me: “you have thought about this before”. Sometimes I find that the same notion surfaced three months ago — which usually means it deserves serious attention. This is where “helping me keep” and “helping me think” connect.

Three: I can reopen a conversation around a single idea. This returns to how the first kind of tool is used, except that this time it starts from an idea that was properly caught, rather than from scratch. By the end of the chat, I can also have it turn the whole conversation into something I can show to others.

An idea’s six-step journey

  • Capture quickly: Ctrl+Shift+I opens a small window; Enter saves the note and hides the window.
  • Add context: AI proposes a domain and tags without requiring you to organize everything at capture time.
  • Recall related ideas: the library surfaces up to three similar earlier notes.
  • Keep attention visible: the home view shows five recent ideas and up to five conversations needing follow-up.
  • Explore one idea in depth through a dedicated conversation.
  • Turn selected ideas or conversations into a feasibility report and export to Markdown, Word or PDF.

For a good note-taking tool, the measure is not how much it can store, but whether three months later you can still find your way back to it.

So How Do You Choose?

If I had to divide them among the three in one sentence:

· Want AI to help you think a matter through? Use a web chat — pick whichever of the ones above (ChatGPT / Claude / Gemini internationally, or DeepSeek / Kimi / Doubao domestically) suits you.

· Want those scattered ideas you will revisit later to never be lost? Use AI notes — the one I built myself, EchoMind, local-first and open source; you can of course find an equivalent.

· Want AI to run a multi-step task for you to the end? Use an agent — for a general one, look at Manus; in the domestic ecosystem you can try Coze. Hand it the work and it breaks the steps down, looks things up, calls tools, and hands back a usable result.

They often work together. My own routine: an idea surfaces in my notes, I open a conversation right there to think it through, then let the notes help me turn it into a document. Each of the three lends a hand at one stage.

Do not expect one tool to do everything. First be clear about what you want at this moment — to think, to keep, or to do.

A Few Boundaries

As last time, the division of labour needs to be spelled out here too.

However handy the tool, the judgement is still yours. The context AI fills in and the links it draws can both be wrong, and what is worth recording is still your call.

And privacy. Ideas of this kind are often very personal, and those touching on work or other people deserve extra care. I personally prefer local-first tools — data is kept on your own computer by default, not uploaded to a server, and you choose explicitly which parts to sync out when needed. This is also why last time I mentioned “choosing, when necessary, a local tool with clearer permission boundaries”; the one I use now happens to be exactly that, and it is open source, which makes it feel more reassuring.

Let the tool help you remember, but do not let it remember “what really matters” in your place. That part has always been your own concern.

About EchoMind (A Word from the Author)

EchoMind, the one in this piece, is an open-source idea notebook I built myself because of the very problem this article describes. It is still very early, its features keep growing, and rough edges are unavoidable — which is precisely why I am especially eager to find people willing to use it together and share their thoughts.

If you too are often tripped up by “thought of it and then forgot”, you are welcome to give it a try and share your critique:

Visit the EchoMind website ↗GitHub · Downloads, guide and feedback ↗