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TEST-273 docs: document transcriber and endpointing simulation latency limits and the unmeasured flag - #1382

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TEST-273 docs: document transcriber and endpointing simulation latency limits and the unmeasured flag#1382
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@scott-lowe-vapi scott-lowe-vapi commented Oct 31, 2026 •
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Linear: TEST-273 Sims: add transcriber and endpointing latency limits by marking unmeasured turns in Lasensor. Stacked on #1381.

Hold: merge after VapiAI/vapi#25252 deploys. That PR adds the two metrics; it is itself held until VapiAI/vapi#25251 (the unmeasured flag) has been live for a week.

Description

  • Simulation latency limits: add transcriber and endpointing to the dashboard metric list, the cURL example and the metrics table. Replace "turns that recorded 0 for model or voice are left out" with the general rule: a turn counts toward a metric unless its unmeasured list names that metric, a real 0 ms counts, and turn counts every turn. Troubleshooting now points at each turn's unmeasured list.
  • Per-turn latency on a call: document TurnLatency.unmeasured: what it means, that it's omitted when everything was measured, that older entries lack it, and when each component is listed (wording from the field's API description in #25251). The averages bullet now says sims skip flagged turns.

Testing Steps

  • Pinned Fern 5.151.1 check: 0 errors and the same 15 existing warnings.
  • git diff --check passes.
  • In the preview, check the nested list under Understanding latency → Per-turn latency on a call renders, and the new rows in Simulations → Advanced → Metrics and aggregations.

🤖 Generated with Claude Code

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@scott-lowe-vapi @claude
TEST-273 docs: document transcriber and endpointing simulation latenc…
4caa21d 
…y limits and the unmeasured flag

Add the transcriber and endpointing metrics to simulation latency limits, and
explain the per-turn unmeasured list that decides which turns count. Merge
after VapiAI/vapi#25252, which adds the metrics.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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