tocmo0nlord b0df7fd5b0 Fix missed quiet "yes" after phone confirmation: more sensitive VAD ...

After the phone confirmation a caller's "yes" wasn't picked up (silence) until
they repeated it louder. Logs: line was live and the half-duplex gate had
reopened, but VAD never fired for ~14s — the quick/quiet "yes" was below
threshold (min_volume 0.3, start_secs 0.2).

Now that HalfDuplexGate gates out the agent's echo while it speaks, VAD can be
sensitive without echo false-triggers (it only listens hard on the caller's
turn). Lowered min_volume 0.3->0.15, start_secs 0.2->0.1, and trimmed the echo
tail 0.5->0.25 so an answer right after the agent stops isn't dropped.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

2026-06-27 17:36:20 +00:00

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