Spellcast · House #16,459

What it is

Calls itself “local desktop app”.

• Calls itself: local desktop app

“Spellcast is a local desktop app”

Where it puts itself

Rules out “model”.

• Says it will not: model

“It does not run a model or require a model API key.”

What it costs

A free tier, free forever.

• Free plan: free forever

“Spellcast is in early development. Early demo · Experimental preview.”

Who it sells to

Sells to developers. Available in 2 languages.

• Sells to: developers
• Languages: English · 简体中文

“Desktop stage for coding agents”

“English · 简体中文”

How it runs

A desktop app for Windows. Runs locally and works offline. Offers an API. Open source. AI is the core of the product.

• Kind: desktop
• Runs on: Windows
• Runs where: on the device, offline
• API: yes
• Open source: yes
• AI role: core to the product

“Spellcast is a local desktop app”

“Download the preview (Windows only tested)”

What it works with

Integrates with Codex and Grok Build. Built on AntV X6 and Tauri. Names Astra on its pages.

• Integrates with: Codex · Grok Build
• Built on: AntV X6 · Tauri
• Names: Astra

“The graph canvas uses AntV X6 ; the desktop shell uses Tauri .”

“Spellcast was built with GPT-6 Astra.”

What it offers as proof

In beta. Try it without signing up. Publishes docs.

• Stage: beta
• Instant signup: yes
• Trial asks for: nothing

“Spellcast is in early development. Early demo · Experimental preview.”

“Download the preview (Windows only tested)”