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Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

node_modules/@npmcli/agent/README.md

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+## @npmcli/agent
+
+A pair of Agent implementations for nodejs that provide consistent keep-alives, granular timeouts, dns caching, and proxy support.
+
+### Usage
+
+```js
+const { getAgent, HttpAgent } = require('@npmcli/agent')
+const fetch = require('minipass-fetch')
+
+const main = async () => {
+    // if you know what agent you need, you can create one directly
+    const agent = new HttpAgent(agentOptions)
+    // or you can use the getAgent helper, it will determine and create an Agent
+    // instance for you as well as reuse that agent for new requests as appropriate
+    const agent = getAgent('https://registry.npmjs.org/npm', agentOptions)
+    // minipass-fetch is just an example, this will work for any http client that
+    // supports node's Agents
+    const res = await fetch('https://registry.npmjs.org/npm', { agent })
+}
+
+main()
+```
+
+### Options
+
+All options supported by the node Agent implementations are supported here, see [the docs](https://nodejs.org/api/http.html#new-agentoptions) for those.
+
+Options that have been added by this module include:
+
+- `family`: what tcp family to use, can be `4` for IPv4, `6` for IPv6 or `0` for both.
+- `proxy`: a URL to a supported proxy, currently supports `HTTP CONNECT` based http/https proxies as well as socks4 and 5.
+- `dns`: configuration for the built-in dns cache
+    - `ttl`: how long (in milliseconds) to keep cached dns entries, defaults to `5 * 60 * 100 (5 minutes)`
+    - `lookup`: optional function to override how dns lookups are performed, defaults to `require('dns').lookup`
+- `timeouts`: a set of granular timeouts, all default to `0`
+    - `connection`: time between initiating connection and actually connecting
+    - `idle`: time between data packets (if a top level `timeout` is provided, it will be copied here)
+    - `response`: time between sending a request and receiving a response
+    - `transfer`: time between starting to receive a request and consuming the response fully