Under the hood
A new telemetry event records the outcome and duration of each raw WebFetch network request
What
WebFetch (the tool Claude Code uses to fetch a URL's contents) now emits a telemetry event, tengu_web_fetch_transport, around its low-level network request. It records the outcome (error, redirect, HTTP error, or success), how long the request took (httpDurationMs), and how many bytes were returned.
Why
This gives Anthropic visibility into how WebFetch's network requests are performing and failing, which can help diagnose fetch reliability issues.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
Whether the `tengu_web_fetch_transport` telemetry is active for any accounts is unread and not stated.
Anthropic's release notes agree
Changed plain WebFetch deny and ask rules to no longer apply to Artifact tool reads and updates; use an Artifact rule (or…