TTS fixes + hardening for the Donut voiced interview.
Feature:
- gibberish -> pin `language: "en-us"` on every gateway call (DEC-9); the
multilingual model drifted into other-language phonemes without it.
- truncation -> the Zonos model hard-caps one synthesis at 6144 tokens /
71.2s (infra-ops). Chunk client-side (paragraph-first, greedy to ~75%
of cap for prosody; sentence/clause fallback) and concatenate the int16
PCM behind ONE WAV header (DEC-10). /api/tts becomes POST so a long turn
rides the body, not a length-capped URL (DEC-10a).
- persona -> dialogue-only rewrite (no asterisk RP beats -- they were being
voiced as gibberish) + always consult the native `reference_knowledge`
tool before answering (retires the stale kb_bridge references). Pushed
live to ratatoskr:donut.
Heid code-review + bug-hunt hardening (4-arm panels, triaged):
- untrusted /api/tts body fields degrade, never 500: huge-int PAD
(OverflowError), non-str agent_id (unhashable .get), lone surrogates
(utf-8 encode), whitespace-only text.
- serialize lock + client released on every peek escape (cancel /
InvalidURL) -- previously a permanent deadlock.
- a mid-stream drop after a committed 200 degrades (keeps what played),
never raises into the response; a non-WAV 200 body is rejected (RIFF
sniff + bounded header scan) instead of decoded as garbage.
546 tests green; long-form live-verified (106.6s, one header). Contract
brought canonical (DEC-9/10, FN chunk_text/tts_stream_long, POST endpoint,
INV-TTS-4 logging scope, FN pad_to_dials domain). reference_knowledge
empty-recall root-caused to a Worldtree wing-misfile (escalated to
worldtree-dev; not ratatoskr code).
vh
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