# Extension.dev platform documentation

> Extension.dev is the hosted platform that takes a finished browser extension from build to every browser's store. These docs cover the console, the publish rail, shared previews, and the agent tools: the MCP server, the agent skill, and the CLI.

Extension.dev sponsors Extension.js, the open source framework it builds on. The framework covers create, develop and build on your own machine, up to packaging, and is documented at https://extension.js.org. The platform begins where a workspace or an access token is minted, and that is what these docs describe.

extension.dev is not open to the public yet. Every page here is truthful about the platform. Signup and the hosted console answer that they are not open yet until it opens.

## Start here

What the platform is, and your first extension shipped to every browser.

- [Overview](https://docs.extension.dev): What Extension.dev is, the map of the docs, and where to go next.

## Agent tools and the CLI

What the platform gives a coding agent, and where the CLI mints a token.

- [MCP server](https://docs.extension.dev/tools/mcp): Give a coding agent the build, preview, release and publish verbs.
- [Agent skill](https://docs.extension.dev/tools/skill): The judgment half of the agent stack, one skill in the open Agent Skills format.
- [CLI](https://docs.extension.dev/tools/cli): The framework CLI, where it touches the platform, and the agent-facing package.
- [Agent bridge](https://docs.extension.dev/tools/agent-bridge): The local channel that lets a human, a script or an AI agent observe and act on a running extension.
- [Agent logs](https://docs.extension.dev/tools/logs): One ordered stream of everything the extension does, across every context.
- [Inspect and act](https://docs.extension.dev/tools/inspect-and-act): Read the live DOM of any surface and run scoped operations in the exact context you care about.

## Ways to start a project

Begin from a template, an imported repository, or a theme.

- [Start from a template](https://docs.extension.dev/guides/templates): The template catalog, what each page shows, and how a template becomes a repository.

## Related

- [Extension.js framework docs](https://extension.js.org): The free, open source framework the platform sponsors. It covers create, develop and build on your own machine, up to packaging.