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node_modules/npm/doc/cli/npm-cache.md

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+npm-cache(1) -- Manipulates packages cache
+==========================================
+
+## SYNOPSIS
+
+    npm cache add <tarball file>
+    npm cache add <folder>
+    npm cache add <tarball url>
+    npm cache add <name>@<version>
+
+    npm cache ls [<path>]
+
+    npm cache clean [<path>]
+
+## DESCRIPTION
+
+Used to add, list, or clear the npm cache folder.
+
+* add:
+  Add the specified package to the local cache.  This command is primarily
+  intended to be used internally by npm, but it can provide a way to
+  add data to the local installation cache explicitly.
+
+* ls:
+  Show the data in the cache.  Argument is a path to show in the cache
+  folder.  Works a bit like the `find` program, but limited by the
+  `depth` config.
+
+* clean:
+  Delete data out of the cache folder.  If an argument is provided, then
+  it specifies a subpath to delete.  If no argument is provided, then
+  the entire cache is cleared.
+
+## DETAILS
+
+npm stores cache data in the directory specified in `npm config get cache`.
+For each package that is added to the cache, three pieces of information are
+stored in `{cache}/{name}/{version}`:
+
+* .../package/package.json:
+  The package.json file, as npm sees it.
+* .../package.tgz:
+  The tarball for that version.
+
+Additionally, whenever a registry request is made, a `.cache.json` file
+is placed at the corresponding URI, to store the ETag and the requested
+data.  This is stored in `{cache}/{hostname}/{path}/.cache.json`.
+
+Commands that make non-essential registry requests (such as `search` and
+`view`, or the completion scripts) generally specify a minimum timeout.
+If the `.cache.json` file is younger than the specified timeout, then
+they do not make an HTTP request to the registry.
+
+## CONFIGURATION
+
+### cache
+
+Default: `~/.npm` on Posix, or `%AppData%/npm-cache` on Windows.
+
+The root cache folder.
+
+## SEE ALSO
+
+* npm-folders(5)
+* npm-config(1)
+* npm-config(7)
+* npmrc(5)
+* npm-install(1)
+* npm-publish(1)
+* npm-pack(1)