Build
Poly Build is a web-based agentic development environment for creating and designing web apps. AI agents work in isolated sandboxes to build, iterate, and ship — all from your browser.
Key Features
Sandboxed Environments→
Each project runs in an isolated sandbox with its own filesystem, runtime, and network.AI Agents→
Configure autonomous agents that write code, debug, test, and deploy on your behalf.Instant Preview→
Live preview URLs for every change. Share with teammates before merging.Project Configuration→
Define frameworks, dependencies, and build settings per project.Quick Start
Open build.poly.inc and create a new project. Choose a template or start from scratch. Build provisions a sandbox, installs dependencies, and launches a preview URL automatically.
Configuration Overview
Build is configured through the project settings UI and thebuild.json file at the project root. Configuration covers:
- Project settings (framework, runtime, dependencies)
- Sandbox configuration (resources, permissions, network)
- Agent behavior (model, tools, autonomy level)
- Environment variables (secrets, feature flags, API keys)
- Deployment targets (preview, staging, production)