Follow Discord
Sweep 10 Nov 2026 · 02:18Z Build v2.1.322 539 read Stable v2.1.311 Latest v2.1.322 Next v2.1.322 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.268 ·

API request telemetry gains time-to-first-content, per-attempt request IDs, and richer retry data

API call telemetry now tracks time-to-first-content, a client request ID per attempt, and more detail on retries

Group of 3 Under the hood Internal Changes
JSON All of v2.1.268
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
Internal ChangesKind: in v2.1.268,
Internal ChangesSection of the release

Unclear Whether this is controlled by the tengu_api_success gate is unread for this account, so nothing can be said about whether it is switched on.

What

  • The end-of-request telemetry (the api_request event and related completion logging) now tracks a firstContentMs value — time to first content — separately from time-to-first-token, and includes a ttft_ms field when that value is available.
  • The main API-call success event, tengu_api_success, now also records firstContentMs, a client-generated request ID (clientRequestId), and the UUID of the originating user message (user_message_uuid).
  • The API call dispatcher now generates a new clientRequestId for each attempt (sent as an extra header) and tracks an attempt counter, reporting request lifecycle telemetry — success/failure, status code, error class, attempt number, clientRequestId, requestId — plus a durationMs field on tengu_api_success that excludes time spent on retries.

Why These fields give much finer-grained visibility into API call performance and retry behavior, making it possible to distinguish slow model responses from network/retry overhead and to trace individual attempts by their request ID.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtWhether this is controlled by the tengu_api_success gate is unread for this account, so nothing can be said about whether it is switched on.

See this entry in the whole of v2.1.268 →

Feedback