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Following the README's install steps in Claude Code:

/plugin marketplace add umputun/revdiff
/plugin install revdiff@umputun-revdiff

results in:

Marketplace "umputun-revdiff" not found

/plugin marketplace list shows the marketplace is registered as revdiff (the name field from .claude-plugin/marketplace.json), not umputun-revdiff. Claude Code does not derive the marketplace name from the owner/repo path — it
uses the name declared in marketplace.json.

What actually works:

/plugin marketplace add https://github.com/umputun/revdiff
/plugin install revdiff@revdiff

(or /plugin marketplace add umputun/revdiff followed by /plugin install revdiff@revdiff.)

Suggested fix

Update the README install snippet to use revdiff@revdiff, or rename the marketplace in .claude-plugin/marketplace.json to umputun-revdiff to match the documented command.

Environment

• Claude Code (CLI), macOS (Darwin 24.6.0)