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tomkit/chromium-my-assistant

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[Fork]: AI-native Chromium: ReactJS/NextJS embedded app as a "My Assistant" Side Panel

This is a fork of Chromium@6bc36285b0453568e25dcb0fe7f44a2a74a30962 (6/27/25) that has the plumbing done to embed a ReactJS/NextJS into Chromium as a Side Panel. It allows web developers to quickly iterate and build AI assistant products. The AI Side Panel has access to the main browser's DOM so you can pass its context to LLMs like OpenAI's ChatGPT.

Building Chromium

autoninja -C out/Default chrome

Developing web app (hot reload)

Go to localhost:3000.

NOTE: You won't have access to the browser's DOM in this mode.

Developing web app with Chromium brower DOM

Go to localhost:3000.

Running Chromium

Make sure your OPENAI_API_KEY is in your shell env:

Opening the My Assistant Side Panel

GitHub Copilot Integration in Chromium

This directory provides instructions and prompts for integrating GitHub Copilot
with the chromium codebase.

This directory is currently in a prototyping state and may be removed in the
future. As we add support for multiple coding IDE/agents, we will likely pull
common prompts and instructions into a central directory with stubs for bespoke
IDE/agent integration. Please check with your organization before using GitHub
Copilot.

Where is copilot-instructions.md?

copilot-intructions.md is typically a single
instruction file that contains default instructions for a workspace. These
instructions are automatically included in every chat request.

Until the prompt in copilot-intructions.md is generally agreed upon for the
chromium repo, this file is intentionally excluded from the repo, and added to
the .gitignore for your customization.

For generating your own copilot-intructions.md, type
/create_copilot_instructions in GitHub Copilot to get started.

Code Layout

User Specific Prompts

Users can create their own prompts or instructions that match the regex
.github/**/user_.md which is captured in the .gitignore.

Contributing Guidelines

Use /git_commit_ghc

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