Euridian

Euridian — Infomaniak Euria chat & vault agent for Obsidian

Chat with Infomaniak Euria (Swiss cloud AI, GDPR-compliant) in an Obsidian sidebar, and optionally let the model read, search and write your notes.

Looking for a self-hosted model (Ollama, vLLM, LM Studio, a university server)? Use the sibling plugin Self-hosted LLM Vault Agent (repo). Both plugins share the same core; Euridian used to include those backends up to version 0.3.

⚠️ Vault agent — please read before enabling

The plugin can give the AI model function-calling tools that act on your vault: list notes, read notes, search, create notes, append to notes, and overwrite a note's entire content. This means the model can modify your files.

• No delete tool exists at all — not locked, simply not implemented.
• Writes require confirmation by default (setting Confirm before writing): every create/append/overwrite shows a preview modal (with a word diff for overwrites) before anything touches disk. You can turn this off, but it's not recommended.
• Overwriting a note replaces its entire content. Anything the model doesn't repeat back is lost. The modal highlights this in red when content would shrink.
• The agent can be disabled entirely (Vault agent setting) if you only want plain chat.
• Note content you ask about is sent to Infomaniak's API. See Privacy below.

✨ Features

• 💬 Chat sidebar with multiple tabs, persistent history, streaming responses; each chat keeps its own backend and model
• 🤖 Vault agent (function calling) — read, search, create, append and edit notes on request, with confirmation + diff preview before any write
• 📄 Documents — the agent can also read PDF, DOCX and PPTX files in your vault
• 🌐 Optional web search — DuckDuckGo (no account) or Brave Search API, off by default
• 📎 Attachments — drag & drop files/images, attach vault notes or the current editor selection
• ⚡ Slash commands — reusable prompt templates (/summarize, /translate, …) with placeholders {{input}}, {{selection}}, {{note}}, {{title}}
• 🔗 @mention — reference any vault note from the chat input
• ✏️ Inline edit — select text, edit it with AI, review a word diff, accept or reject
• 📝 Custom instructions file — a short markdown file in your vault with conventions for the agent (see below)

Language: the interface is in English and follows Obsidian's language setting; a German translation is included. Built-in prompt templates and prompts to the model are localized the same way.

🤖 Using the vault agent

With Vault agent enabled (default) and a model that supports function calling, just ask naturally:

"Summarize the note 'Project X'" "Search my vault for notes about network routing" "Append today's meeting notes to my daily note" "What does the PDF in my attachments folder say about warranty terms?"

Each tool call appears as a chip in the chat. Extracted document text is capped at 40k characters per file; scanned PDFs without a text layer return no text. Not every model supports function calling reliably; very small models (≲1B parameters) tend to hallucinate results instead of calling tools.

🌐 Web search (optional)

Adds a search_web tool. It is off by default, independent of the vault agent, and always runs locally through your own internet connection — so it also works when your model runs on a server without internet access. Enable it in Settings → Enable web search and pick a provider:

• DuckDuckGo (default, no account or key) — reads DuckDuckGo's HTML results page. This is unofficial, so it can break or be blocked with a bot check after many requests.
• Brave Search API — more stable, needs a free API key from brave.com/search/api (free tier available).

📝 Custom instructions file

Point the plugin at a short markdown file (Settings → instructions file, default Euria.md in the vault root) describing your vault's structure and conventions. Keep it short and specific: large general-purpose instruction files written for another assistant can overwhelm smaller models so that they stop calling tools.

🚀 Quick start

1. Get an API key and Product ID at infomaniak.com/en/hosting/ai-services (Account → AI Tools → API token).
2. Enable the plugin under Settings → Community plugins, open the Euridian settings, paste the API key and Product ID, and click Load models and prices.
3. Open the chat: Command palette → Euridian: open chat, or use the ribbon icon.

🔐 Privacy & network use

Euridian is desktop-only and talks to these services only when you use it:

No telemetry. The API key is stored in plain text in Obsidian's data.json (standard Obsidian behavior). Anything you ask about is sent to Infomaniak — anonymize confidential or personal data before asking, not after.

ℹ️ Requirements and disclosures

• Account required. You need an Infomaniak account with the AI Tools product to get an API token and Product ID. Infomaniak offers a free tier; beyond that, usage is billed by Infomaniak according to its price list. Euridian itself is free.
• Network use. See the table under Privacy & network use. Nothing is sent anywhere until you send a message, load the model list, or run a web search.
• No telemetry, no ads, no self-updates.
• Not affiliated. Euridian is an independent project and is not affiliated with or endorsed by Infomaniak. "Infomaniak" and "Euria" are trademarks of their respective owners.

📦 Third-party software

The plugin bundles these libraries (their licenses apply):

The bundled main.js is minified but not obfuscated; the full source is in this repository. pdf.js contains a one-time feature check (new Function("")) that the plugin does not use for anything else; the plugin itself runs no dynamically generated code.

🔧 Development

git clone https://github.com/jlueschow/obsidian-euridian-plugin
cd obsidian-euridian-plugin
npm install
export EURIDIAN_PLUGIN_DIR="/path/to/YourVault/.obsidian/plugins/euridian"
npm run dev      # watch, rebuild and deploy on every change
npm run build         # production build (dist/main.js)
npm run build:deploy  # production build + copy into your vault

src/core is shared with the sibling plugin and is the source of truth here; src/variant holds what is specific to Euridian (Infomaniak provider, price catalog, branding). Sibling repos sync the core with scripts/sync-core.mjs.

📄 License

MIT — see LICENSE.