A TypeScript implementation over node:net, node:tls and node:events:
Dispatcher, Client (HTTP/1.1 with keep-alive), Pool, Agent,
buildConnector, request(), errors, the global dispatcher, fetch, Headers
and the diagnostics_channel publications, with per-version behavior.
Differential npm cases run the vendored real undici under Node.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>