What
claude plugin details <name> shows what a plugin contributes and estimates how much context its components add.
Usage
claude plugin details my-plugin
claude plugin details my-plugin --jsonDetails
- Lists component inventory for skills, commands, agents, hooks, and MCP servers.
- Shows estimated always-on token cost added to each session.
- Breaks down per-component always-on and on-invoke costs when available.
- Supports JSON output for scripting.
Evidence
Plugin details subcommand and report output (search for "Show a plugin's component inventory and projected token cost", "Component inventory", "Projected token cost")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agree
Added claude plugin details <name> to show a plugin's component inventory and projected per-session token cost