Hosting Config
Data Import
Published Site
Command
Procedural 3D
Hosting Config
Theme
Card Definition
Hosting Config
Boxel Credit
Published Site
Theme
Listing
Video
Audio
Card Instance
Formats
Card Instance
3D Model
Card Instance
Card Definition
Procedural 3D
Card Instance
Card Definition
Field
Boxel Credit
Issue
Theme
Issue
Procedural 3D
Font
Theme
Listing
Issue
Card Definition
Formula
Card Definition
Flow
Formula
Command
Wiki
HTML Prototype
Formats
Vector
Font
Card Definition
Theme
Wiki
Hosting Config
Wiki
3D Model
HTML Prototype
Boxel Credit
Theme
Boxel Credit
Procedural 3D
Query
3D Model
Issue
Formats
Boxel Credit
Formula
Skill
Flow
Formats
Skill
Boxel Credit
Canvas
Audio
Video
Boxel Credit
Formula
Video
Command
Video
BFM Document
Table
Procedural 3D
3D Model
BFM Document
HTML Prototype
Canvas
Card Instance
Card Definition
Procedural 3D
Data Import
Published Site
Agent Session
Published Site
Formula
Field
HTML Prototype
Data Import
Formats
Query
Formula
Boxel Credit
Skill
Formats
BFM Document
Query
Listing
Query
Field
Card Instance
Formats
Video
HTML Prototype
Formats
Video
HTML Prototype
Wiki
Canvas
Skill
Procedural 3D
Theme
Vector
Flow
Table
HTML Prototype
Audio
Vector
Boxel Credit
Listing
Skill
Wiki
Vector
Card Instance
Command
Skill
Card Instance
Issue
Hosting Config
Issue
Data Import
Skill
Field
Command
Field
Boxel Credit
Skill
Agent Session
3D Model
Field
Video
Theme
BFM Document
Hosting Config
Procedural 3D
Issue
3D Model
Theme
Published Site
Issue
Flow
Audio
Video
Command
Formula
Published Site
Wiki
Hosting Config
Field
Formula
Flow
Listing
Agent Session
Table
Vector
Field
HTML Prototype
Wiki
Flow
Card Definition
Font
Published Site
Listing
Field
Procedural 3D
Canvas
Theme
Vector
Canvas
BFM Document
Hosting Config
Boxel Credit
Query
Agent Session
Font
Vector
Theme
Data Import
Audio
BFM Document
Command
BFM Document
Listing
Audio
BFM Document
Audio
BFM Document
Canvas
Published Site
Canvas
Theme
Command
Card Instance
Agent Session
Hosting Config
HTML Prototype
BFM Document
Theme
Flow
Procedural 3D
Formats
Published Site
Canvas
Agent Session
Formats
Skill
Hosting Config
Boxel Credit
Flow
Canvas
Flow
Command
Table
HTML Prototype
Card Definition
Canvas
Listing
Font
Query
Data Import
Skill
Command
Listing
Published Site
Listing
Canvas
Flow
Issue
Agent Session
Formats
Issue
Skill
BFM Document
HTML Prototype
Formula
Data Import
Formula
Font
Formats
Table
3D Model
Flow
Audio
Font
Table
Wiki
Audio
Flow
HTML Prototype
Table
3D Model
Canvas
Vector
Query
Hosting Config
Agent Session
Table
Listing
Published Site
Flow
Published Site
Canvas
Field
Data Import
Boxel Credit
Query
Card Definition
Formula
3D Model
Procedural 3D
Listing
Query
Font
Table
Font
Audio
Skill
3D Model
Listing
Audio
Video
Skill
Agent Session
Hosting Config
Data Import
Font
Issue
Card Definition
Video
Skill
Issue
Video
Formula
Procedural 3D
Video
Boxel Credit
Audio
Command
Field
Data Import
Flow
HTML Prototype
Wiki
HTML Prototype
3D Model
Formats
Table
Query
Audio
Table
Vector
Font
Card Definition
Table
Hosting Config
Query
Agent Session
Vector
Card Instance
Font
Hosting Config
Video
Wiki
Audio
3D Model
Field
Data Import
Theme
Vector
Data Import
BFM Document
Data Import
Wiki
Command
Issue
BFM Document
3D Model
Wiki
Published Site
Formula
Procedural 3D
Card Definition
Field
Vector
Formats
Query
Command
Field
Agent Session
Vector
Query
Canvas
BFM Document
Card Definition
Listing
Vector
Font
Issue
Table
Agent Session
Card Instance

Build software with AI. Then actually use it.

Boxel is the collaboration space where you and your agent make working apps, documents, and tools — with real data, reusable code, and instant feedback.

Start Using View on GitHub
100% Open Source MIT License Remixable Bring Claude Code or Codex
AI Workspace

Give your agent a workspace, not just a chat window.

Chat forgets. A workspace accumulates — files, data, skills, and working software that both of you can see. And because code and data live side by side, the code you deposit upgrades what the workspace itself can do.

  1. STORE Documents and files

    14 files written — Word docs and PDFs, indexed and searchable.

  2. CODE Deposit code

    Ported to cards — source is in the workspace and the preview is live.

  3. DATA Import data

    812 rows became cards — faceted search is wired up.

  4. SKILLS Write skills

    Updated press-release.md — the skill now enforces one-sentence ledes.

  5. WORKSPACES Compartmentalize projects

    Found it in halden-legal — opening the card.

  6. AGENT Everything you’ve made

    Found PricingTable in nomad-coffee — linked into this project.

  7. CLOUD In the cloud

    In your realm on boxel.ai — synced, indexed, and backed up.

  8. SHARE Host and remix

    Live in host mode — visitors get the app, plus a Remix button.

Boxel — Documents and files
Documents and files
Boxel — Deposit code
Deposit code
Boxel — Import data
Import data
Boxel — Write skills
Write skills
Boxel — Compartmentalize projects
Compartmentalize projects
Boxel — Everything you’ve made
Everything you’ve made
Boxel — In the cloud
In the cloud
Boxel — Host and remix
Host and remix
Agent CLI

Use Boxel with the agent you already pay for, trust, and know.

Your agent interacts with the workspace through a full-featured CLI. You ask in plain English — it writes the boxel commands. Already pay for Claude Code or Codex? The open-source Boxel CLI connects them straight to your workspaces.

Works with
Claude Code Claude Code
OpenAI Codex OpenAI Codex

Quickstart — copy one prompt into your agent

Set up Boxel for me: install the CLI with `npm install -g @cardstack/boxel-cli`, connect my account with `boxel profile add` (Production, app.boxel.ai), and add the Boxel skills with `/plugin marketplace add cardstack/boxel` then `/plugin install boxel-cli`. Verify by running `boxel realm list` and show me my workspaces.

Paste it into Claude Code or Codex — your agent runs the install, connects your account, and confirms.

View on GitHub — MIT licensed, open source
claude — ~/halden-shop

All Commands

realm create Spin up a new workspace
realm pull Download a workspace to your machine
realm push Upload local changes to Boxel
realm sync Bidirectional sync with conflict resolution
realm watch Pull server-side changes in real-time
realm history Checkpoints, undo, and restore
realm publish Publish a live, public copy — host mode
realm ingest-card Copy a card and its deps from any realm
file read / write Read and write individual realm files
lint Lint a whole workspace, or one file
parse Type-check cards before you push
test Run card test suites headlessly
search Federated search across workspaces
run-command Run a host command from the CLI
realm list Browse your workspaces
profile Manage accounts and environments
AI-Native Stack

Legacy stacks weren't built for AI.

Built on Cardstack

AI excels at reading and writing files. So we built an architecture where one file type defines your entire application—schema, templates, relationships, and commands.

  • Two file types: JSON for data, TypeScript for logic
  • AI-native formats: Both are in every LLM's training corpus
  • One file, all layers: Schema, UI, and logic live together
Architecture

One file. Full stack.

Five traditional layers—frontend, backend, API, database, orchestration—compressed into TypeScript + JSON.

Gallery image 1
Memory

Workspace memory that persists.

In other tools, chat IS your project. Lose the chat, lose the work. Boxel inverts this: the workspace remembers, sessions are disposable helpers you summon and discard.

Gallery image 1
Database

The database that builds itself.

Data is just JSON. AI outputs JSON, we index it automatically into a queryable database. No Supabase, no migrations, no SQL.

Gallery image 1
Context

AI that understands your app.

Current AI tools are "brains in a jar"—floating outside your actual data. Boxel's assistant reads your schema, inspects your Cards, and accesses code when needed.

Gallery image 1

What will you build?

The transition from human-written to AI-generated software will be one of the most significant shifts in technology history. The constraint isn't architecture anymore. It's imagination.

Explore

Open a workspace and ask the AI to build something.

Remix

Browse the catalog for components that match your needs.

Extend

Hit a limitation? Switch to Code Mode and fix it.

Contribute

Build a skill, publish a template, share what you've learned.

Start Using Read the White Paper