Rubra Candela 0.1.0

Windows will try to stop you

This installer is not code-signed. A certificate from a recognised authority costs several hundred dollars a year, and Rubra Candela is free, so it does not have one yet. The consequence is a warning, and it is better that you read it here than meet it by surprise.

1. 01

   Click More info. It is a small link, above the button, and easy to miss — the dialog is designed so that the obvious action is to give up.

2. 02

   The publisher line will read Unknown publisher. That is accurate. It is what an unsigned application looks like.

3. 03

   Click Run anyway.

SmartScreen is reporting that it does not recognise the publisher. It is not reporting that it found anything wrong. Those are different claims, and the dialog does not distinguish them well. Being wary of an unsigned installer from a site you have just met is a reasonable instinct, so if you would rather check the file before you run it, the next section is how.

Verify what you downloaded

This is the SHA-256 of the exact file this page links to, computed when the site was built rather than typed in by hand.

1F98DC45CEFE15E73DB1CBB74117BA68E5A493F292B8439CD9ED3CF4D77998DE

Windows PowerShell

Get-FileHash .\RubraCandela-Setup-0.1.0-x64.exe -Algorithm SHA256

Command Prompt

certutil -hashfile RubraCandela-Setup-0.1.0-x64.exe SHA256

Be clear about what this proves. It confirms the file on your disk is the file this page describes, which catches a truncated download or a mirror that is not us. It is not a substitute for a signature: anyone able to alter the installer on this server could alter this page too. A real chain of trust needs the code-signing certificate, and that is on the list.

Install Ollama first

Rubra Candela does not include a language model. It talks to Ollama on localhost:11434, which you install separately and free. Bundling it would triple this download and conflict with any copy you already have.

On first run Ollama downloads a model from Ollama’s own servers — a connection between you and them, under their terms, and the one part of this that is not local. No part of your code is included in it. Rubra Candela tells you if Ollama is missing rather than failing quietly.

What it needs

Operating system

Windows 10 or 11, 64-bit

Memory

8 GB minimum, 16 GB recommended

Disk

95.7 MB for the application, plus a few GB for the model

Local AI runtime

Ollama, installed separately

Graphics

Optional — a GPU makes answers faster; it works without one

Internet

Only to sign up, and to download the model once

macOS and Linux builds are not published yet. The application runs on both; signing and notarisation are what is missing. Write to hello@rubracandela.com if you want to be told when they exist.