Getting started

Deltaview is a Claude Code plugin for visual, in-browser review of a branch's changes. Run /deltaview <branch|commit> and your app opens in your own Chrome with an overlay on every on-screen element the change affects. Open an overlay to see its diff and a plain-language breakdown, then approve, reject (with a reason) or comment. Finish review posts one GitHub review to the open PR and saves a manifest a follow-up agent can act on.

Requirements

• Claude Code with the Claude in Chrome extension connected. This is required: if the extension isn't available, Deltaview stops.
• Node.js 20 or later.
• The gh CLI, authenticated with access to the repo, to post reviews. Without it the review is saved locally only.
• A web project whose dev server already runs locally with your existing env.

Install

In Claude Code:

/plugin marketplace add DavidAEriksson/deltaview
/plugin install deltaview@deltaview

For local development of the plugin itself: claude --plugin-dir /path/to/deltaview.

Your first review

From inside your project, pass a branch name or a commit hash:

/deltaview feat/my-branch

The skill is /deltaview:deltaview; the bare /deltaview works too unless another command already has that name. See Running a review for what happens next.

After the review, /deltaview:fix [branch] works through the rejected and commented items in the reviewed branch. Run /deltaview <branch> again once the fixes are pushed to re-review; see Fixing and re-reviewing.

Update

Refresh the marketplace to fetch the latest release, then restart Claude Code so the new version loads:

/plugin marketplace update deltaview

If the old version still loads after the restart, open /plugin, go to the installed plugins and update deltaview from there. To update automatically, turn on auto-update for the deltaview marketplace under /plugin → Marketplaces. /plugin shows which version is installed.