Mnemosyne OS with Obsidian

Mnemosyne OS reads your Obsidian vault as you organised it, and gives a few things back into it. It never moves, renames or rewrites your notes.

Before you start

On the first onboarding screen, tick "I use Obsidian". The features on this page only appear once that box is ticked.

The app finds your vaults through Obsidian's own list. If Obsidian has never been opened on this computer, it finds no vault.

Your notes go into memory

Add your vault folder with "Add a folder to watch". The app then reads each note split by its headings, your [[links]], your tags and your folders. Tags are read in the frontmatter (tags: [a, b] and the list form) and as #tags in the text, nested tags included (#project/garden).

Ask the chat a question: the answer cites the notes it used.

Your tags and folders become topics

Open Settings › Spine Studio › Topics on your vault. The app shows the tags and folders that come back most often in your notes. Nothing is decided for you.

You can turn a tag into a topic, for example "every note tagged #garden goes to Garden". The app says how many notes the rule will file before you apply it. A folder works the same way. You can also correct one note by hand by picking its topic on its card. Every apply can be undone in one click.

A chat answer becomes a note in your vault

Hover over a chat answer and click the book icon, "Write into Obsidian". If you have several vaults, the app asks "Which Obsidian vault?".

The note is written to <your vault>/_mnemosyne-notes/ and named YYYY-MM-DD HHhMM <your question>.md. It holds Obsidian properties (tags: [mnemosyne], source: mnemosyne-chat, date, question), your question as the title, then the answer. A Sources section follows. A source from the same vault becomes a [[link]] and shows in your graph; a source from elsewhere is given by name.

Once the note is written, "Open in Obsidian" opens it.

The app writes only inside _mnemosyne-notes/ and never overwrites a note: a name already taken gets (2), (3). This folder is not read back into memory, so the app never cites its own answers as your notes.

A note's topic written into the note

In Topics, a note already filed in a topic has a "Write into the note" button. It only shows for notes inside an Obsidian vault.

The first click shows the exact line that will be added, for example mnemo-spine: GARDEN. Nothing is written yet. The second click writes it, and Obsidian then shows the topic as a property.

One line is added to the frontmatter, before its closing ---. Every other line stays exactly as it was, and a note without frontmatter gets one. If the topic changes, the same mnemo-spine line is replaced, never duplicated. If you edited the note in Obsidian between the two clicks, nothing is written: click again to see the new preview. If your frontmatter already sets a spine (spine: …), the app writes nothing and yours wins.

Also

On a note in the file explorer, "Open in Obsidian" opens it in the right vault.