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

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