Use my Johnny.Decimal system. [0] (Disclosure: I'm Johnny.)

Every part of my life and business has a well-defined ID. This ID has:

- A defining entry in my index [1], which is an Obsidian vault.

- Therefore, also a Markdown note(s).

- A folder on disk.

I have a CLI [2] and agent skills [3] that help your LLM understand these relationships.

Then you just:

    jd 21.15    // or search by title
    claude

and now Claude has access to:

- All of your notes from your index. This is your shared memory: it's designed to be human-readable.

- All of its memory and transcripts from the fact that you launch it in the same folder whenever you do this piece of work. This is its internal memory.

- With this comes the ability to easily `--resume` past conversations and so on.

That's … it. Carefully-named Markdown files and folders. My numbers aren't a prerequisite – there's nothing magical about them – but they sure help.

You can do this all for free. It takes about half an hour to set up. My MCP server [4] adds some quality-of-life but is paid (and means I can buy lunch :).

> I’m exploring whether to build something

I really wouldn't. I get 10 emails a week from people who already are and I don't see the point. It's a solved problem.

[0]: https://johnnydecimal.com/

[1]: https://johnnydecimal.com/documentation/the-jdex

[2]: https://johnnydecimal.com/documentation/jd-cli

[3]: https://johnnydecimal.com/documentation/agent-skills

[4]: https://johnnydecimal.com/software/mcp-server