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OpenCode Chrome Annotation

A Chrome extension paired with an OpenCode plugin that lets a developer annotate any web page and send the screenshot, selected element details and an instruction straight into an OpenCode coding-agent session.

Visit website (opens in a new tab)github.com
OpenCode Chrome Annotation

OpenCode Chrome Annotation connects a Chrome browser extension to the OpenCode coding agent. After installing the extension and adding the plugin to an OpenCode configuration, a developer connects the current browser tab to an active OpenCode session, selects a page element, writes an instruction, and submits it.

The plugin sends the written instruction, the page URL and title, metadata about the selected element such as its selector, tag, text, role and bounds, and a locally saved screenshot referenced in the OpenCode prompt. It runs a local HTTP server on a fixed port range so the extension can discover the active OpenCode session over localhost, and it is built with TypeScript and Bun.

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