ebcc7bc: A failed safeFetch says whether the request was sent (PO-808). When no hop of any attempt put a byte on the wire — a refused address before the lookup or at connect time, a lookup timeout, an unsendable header or URL, a credential bound to another origin, or a connection that was refused, unresolved, unreachable or timed out while connecting — the error carries meta.sent = false. The new mayHaveBeenSent(err) reads it, and answers true for everything else. Errors from the runtime stay TypeErrors with their cause unchanged.

ebcc7bc: safeFetch works on Node 26 again (IN-40). It sends through undici's own fetch, the one its guarded dispatcher belongs to, instead of the runtime's built-in fetch — Node 26 refused the SDK's undici 6 dispatcher and every request failed with fetch failed. A fetch a test puts in the global's place is still called instead, so package suites that stub globalThis.fetch keep working, and every answer is still the runtime's own Response.

v1.15.0