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

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