November 2025
We built an AI chat app. There are a lot of those.
But we built it differently.
The problem
AI chat apps feel like enterprise software. Cold interfaces, corporate design, "productivity" everything. They work. But they don't feel like anything.
And most of them can't actually do anything. No persistent files. No real code execution. No memory across conversations.
We wanted something with craft. Something with capability. Something for people who actually build things.
What we made
Arbor is LLM chat with persistent memory, sandbox execution, and generative UI.
Persistent sandbox
Execute Python, JavaScript, TypeScript, Bash in a real environment. Install packages. Clone repos. Write files.
Come back tomorrow—it's all still there. Your dependencies. Your scripts. Your workspace.
Unix-like tools built in: glob, grep, read, edit, write, bash. Work with code the way you actually work with code.
Multi-media generation
Generate images with DALL-E 3, Imagen, Flux, or Stable Diffusion. Generate video. Generate audio. Generate 3D models.
All in one interface. Bring your own API keys for privacy and cost control.
Subagent orchestration
Need to search a codebase fast? The explore agent uses Claude Haiku for quick file finding and pattern matching.
Need to plan something complex? The plan agent uses Claude Sonnet for architecture decisions and implementation steps.
Run them in parallel. Delegate the right task to the right model.
Projects and rules
Group chats by projects. Add modular rules—composable instructions you can toggle on and off.
"Always use TypeScript." "Prefer functional patterns." "Keep responses concise."
Stack rules. Reorder them. Enable per-project.
Schedule automation
"Every Monday at 9am, summarize my week."
Daily, weekly, monthly triggers. Timezone-aware. Cron-based execution in the background.
Attachment intelligence
Upload PDFs, documents, code. Semantic vector search finds what you need.
"Search my uploaded docs for authentication patterns."
RAG-powered retrieval scoped to your chat or project.
Memory that persists
Working memory stores facts about you across every conversation.
"Remember I prefer dark mode examples."
Semantic recall searches your entire conversation history.
Generative UI
When you start a new chat, Arbor doesn't just say hello. It generates something.
A vinyl production spec sheet. CAD documentation for a sneaker. An architectural blueprint. A data dashboard.
20+ composable UI primitives—cards, metrics, grids, badges, icons, media—assembled from a single prompt.
Not widgets. Custom interfaces.
Models you choose
Claude, GPT-4, Gemini, DeepSeek, Llama via OpenRouter.
Switch mid-conversation. Bring your own keys. Different models for different tasks.
The philosophy
We believe AI tools should have the craft of Linear, the warmth of a good notebook, and the capability of a power tool.
Not enterprise software. Not toy demos. Tools for abstract thinkers and operators.
Arbor is our first step toward that vision.
Try it
Arbor is available now at arbor.computer.
Creative Intelligence Company — Agents for creative exploration.