How Jotsu applications work
Learn how a Jotsu application moves from your description through planning, generation, development preview, validation, and deployment.
A Jotsu application is generated code running in an isolated development workspace. You can preview it, refine it with Codex, inspect its files and logs, and deploy it from Jotsu.
From description to preview#
- You describe the application and choose a visual direction.
- Jotsu prepares the workspace and application resources.
- Codex implements the first version.
- Jotsu validates the result and opens the Builder.
The application can include an interface, database, server-side behavior, API routes, AI inference, and MCP capabilities. Features such as schedules and external integrations are implemented in the application code and configuration.
Development and deployment#
The Builder shows the live development preview beside an interactive Codex terminal. Dev logs contain runtime output from the development server.
Deploy app builds and publishes the current source. Development and deployment use the same application source, but environment variables are delivered to each runtime by Jotsu.