Cloud|

Kit

Create and share browser tools with JavaScript and Markdown pages.

1 min read Updated 2026-09-09 #kit#browser#tools#cli

Kit lets you create and share small browser tools. Start with a blank app or the CSV workshop, edit JavaScript and Markdown files, then save and share the app with other Cloud users.

Use Kit

  • Open an app and choose Start to run a tool. Opening an app does not run its scripts.
  • Add Markdown pages for instructions beside your tools.
  • Process local files and download results without uploading their contents.
  • Use Edit to change source, preview tools and inspect their console output.
  • Manage sharing and inspect the current user's local app data in Settings.

Scripts run in an isolated browser worker without Cloud credentials or network access. Anyone with Use access can read the app's source, so do not put secrets in code. Cloud stores app source and sharing grants; local files and results stay in the browser unless the user downloads them.

Author apps from the terminal

sh
cld kit init ./csv-tool
cld kit validate ./csv-tool
cld kit push ./csv-tool --json

Run cld kit --help for authoring and sharing commands. Read Kit browser apps for the SDK, permissions and revision handling. In-product Help covers using, editing and sharing apps.

Deployment requirements

See Deployment requirements for startup prerequisites and functional checks.

Connect a coding agent

The Cloud skill provides compact working instructions. MCP supplies exact current documentation when details matter.

CLI command
bunx skills add https://docs.example.com

This command installs the working instructions published by this website in the selected coding agent.

For exact, current details, also connect the MCP server through one of the agent tabs.

Installation uses the open-source Vercel Skills CLI.

The skill and MCP complement each other: the skill describes workflows, while MCP supplies current documentation.