Ports Patter's SentenceChunker (MIT, attribution header) behavior-identical
— all 61 upstream golden parity scenarios ship as fixtures and pass,
including documented quirks (current_behavior xfail semantics mirrored from
their parity runner). Terminator tables carry functional CJK; file added to
the test_no_hardcoded_cjk allowlist per convention.
/ws/tts now splits the request into sentences and synthesizes each in turn,
streaming the first sentence's PCM while later sentences are still
generating — the time-to-first-audio win on multi-sentence input.
Single-sentence requests behave exactly like the old single-shot path;
'start' metadata still waits for the first generation so lazy-loading
engines report their true sample rate. Italian comma-decimal guard
hard-disables aggressive first-clause flush per upstream.
Spec 8a (docs/competitive-analysis.md) / parity program Wave 1.4.
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
