arkaigrowth

Chromium Profile Migrator — Development skill for Claude Code

Development community

Inspect, compare, and safely migrate Chromium-family browser profile configuration: extensions, shortcuts, allowlisted settings.

How to install Chromium Profile Migrator

This entry records only its repository, not the path inside it, so there is no exact command to give. Open arkaigrowth/chromium-profile-migrator and copy the folder into ~/.claude/skills/, or the file into ~/.claude/agents/.

What Chromium Profile Migrator does

Inspect, compare, and safely migrate Chromium-family browser profile configuration: extensions, shortcuts, allowlisted settings. Dry-run by default, hash-verified backup and rollback, agent-ready JSON.

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README

Chromium Profile Migrator

`cpmigrate` is a local CLI for inspecting, comparing, and safely migrating selected configuration between Chromium-family browser profiles.

It is Brave-first because Brave profile migration exposed the problem, but its normalized readers also understand Chrome, Chromium, Edge, and Vivaldi profile layouts. Version 0.1 writes only to Brave targets on macOS; the other products and platforms are read-only.

What it solves

Find profiles by their human names instead of guessing whether they are Profile 1 or Profile 5.
See which extensions are installed, enabled, disabled, pinned, or missing.
Compare extension keyboard shortcuts, detect extension conflicts, and detect stored Brave browser-shortcut conflicts.
Compare a small, documented allowlist of portable browser settings.
Build a one-time migration plan without joining a continuous sync chain.
Apply supported Brave shortcut and setting changes only after a dry-run.
Back up every changed Preferences file and support guarded rollback.
Emit stable JSON for Codex, Claude Code, shell scripts, and tests.

What it deliberately does not do

`cpmigrate` never edits `Secure Preferences`, recomputes protected-preference MACs, copies wallet data, migrates passwords/cookies/sessions, or claims that copying an extension folder installs an extension safely.

Chromium blocks silent extension installation for good security reasons. Missing extensions are returned as `manual_install` items with Chrome Web Store URLs. Install them in the target, approve their permissions, then rerun the shortcut migration.

For bookmarks, history, and tabs, use a tool designed for browsing data, such as [`browser-migrate`](https://github.com/navotvolkgroundup/browser-migrate). This project focuses on the configuration layer that tool does not cover.