Claude Code mod

diff-viewer

Diff pane: what Claude changed this turn and this session, per file, plus git diff on demand

Git & GitHub modsValidates on Claude Code 2.1.316 Source

Install

From source

git clone https://github.com/tylergraydev/cc-mods.git
claude --plugin-dir ./cc-mods/diff-viewer

The repo has no marketplace file, so load the plugin folder directly with --plugin-dir.

What it can access

Reach: L2Writes or runs: runs processes, writes the prompt box, reads files, reads the prompt box, reads mod state, persists state, draws
Sees: Write calls, Edit calls, NotebookEdit calls
Draws in: Pane
Hooks: session.startcommand.runtool.callturn.completesession.endui.render

From a static scan of the mod's code by awesome-claude-code-mods. It shows what the code asks for, not a security review.

How Claude Code mods work

A mod is a plugin with a JavaScript or TypeScript module that runs inside Claude Code (version 2.1.287 or later). It can draw panes beside the transcript, a band above the prompt, buttons and toasts, restyle the spinner and tool rows, and watch or rewrite tool calls and prompts.
It installs like any plugin: add its marketplace with /plugin marketplace add owner/repo, then /plugin install name@marketplace.
Check what a mod can reach before installing: it runs with your permissions. Reach goes from drawing only, to reading files, to writing files or running processes, to the network. Run claude plugin validate on a clone to list its hooks and calls without running it.
Turn one off from the Installed tab in /plugin, or start Claude Code with --safe-mode to skip every customization for a session.

Claude Code docs

Details

Repository: tylergraydev/cc-mods
Folder: diff-viewer
Type: Git & GitHub mods
Last updated: 12 October 2026
Listed in: awesome-claude-code-mods

FAQ

What is diff-viewer?

Diff pane: what Claude changed this turn and this session, per file, plus git diff on demand It is a mod for Claude Code, from tylergraydev/cc-mods on GitHub.

What can the diff-viewer mod access?

Its widest reach is "writes or runs" (runs processes, writes the prompt box, reads files, reads the prompt box, reads mod state, persists state, draws). It sees Write calls, Edit calls, NotebookEdit calls. It draws in Pane. Like any mod, it runs with your permissions.

How do I install diff-viewer?

Clone tylergraydev/cc-mods and start Claude Code with --plugin-dir pointing at the mod's folder (diff-viewer).

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