Protopen: A Self-Hosted Static Prototype Deployment Platform for AI Programming Workflows

Protopen is a static site deployment platform designed specifically for AI programming assistants (such as Claude Code, Cursor) and CLI workflows, positioned as the 'last mile' of AI programming workflows. Its core features include one-command deployment, version rollback, access control, and self-hosting capabilities, supporting automated processes from code generation to deployment, allowing CLI-interaction-first AI workflows to easily obtain real-time URLs.

With the popularity of AI programming assistants like Claude Code and Cursor, developers are increasingly using AI to generate static sites and prototypes, but these outputs often stay local, lacking a simple and automated deployment step. Protopen aims to solve this pain point, enabling any process that can execute shell commands to get real-time URLs, becoming a key finishing tool for AI workflows.

Protopen uses CLI as its primary interaction interface, with the web dashboard only for managing deployed content. The CLI design emphasizes simplicity and composability: standard output only returns real-time URLs for easy pipeline operations, Git/branch metadata is output to the standard error stream, and all commands support the --json option to output machine-readable formats. This design aligns with the essence of AI workflows—coding agents interact with the system via CLI.

• One-command deployment: A single line ./protopen deploy ./my-site to get the access URL;
• Stable URL and versioning: Site URLs remain stable, each version has an independent URL to support A/B comparison;
• One-click rollback: ./protopen rollback <site-name> <deploy-id> to quickly roll back to a historical version;
• Access control: Supports public/private modes; private sites require login to access;
• Flexible storage: Local file system for development environments, can switch to object storage like Cloudflare R2 for production environments.

Protopen supports AI assistants to complete deployments independently. Developers can add rules to the AI instruction set: 'When the user requests to share/preview the newly built content, execute protopen deploy <path> and return the URL'. This integration allows AI assistants to independently complete the full process from code generation to deployment online without manual intervention.

Tech Stack: CLI and API are written in Go (ensuring startup speed and cross-platform compatibility), Web uses React, database uses PostgreSQL to store metadata; optional Chromium component to generate site screenshots. Self-Hosted Process: Clone the repository → Start PostgreSQL container → Install dependencies and start API → Run web server; the first startup automatically creates a demo account and sample site for quick experience.

Applicable Scenarios: AI-assisted development processes, rapid prototype verification, design system documentation deployment, static site hosting, private deployment needs. Summary: Protopen is the evolutionary direction of AI-native development tools, not just a simple static hosting service, but a deployment infrastructure tailored for AI programming workflows. Through CLI-first design, AI integration, and self-hosting support, it provides key foundational capabilities for development processes in the AI era.