catalog(asset-engine): add zonos-gateway service (full expressive dials)

New TTS service entry + reproducibility_audit row for the zonos-gateway
wrapper (irv-ml1:8890) — the ext-tts-aliased OpenAI facade over Zonos.
23 fields across Text&voice / Expression / Prosody / Quality / Sampling /
Output section groups; live voice dropdown from /v1/voices; response
format pcm|wav (audition UI forces wav). Distinct from the older down
zonos :8203 entry. jsonschema-validated.

docs/asset-engine/services.yaml

@@ -2312,6 +2312,289 @@ services:
       source for defaults/ranges. Adapter not yet deployed/verified — flip to
       ready (or experimental) after the first successful generation through 8203.
 
+  - id: zonos-gateway
+    name: Zonos Gateway (expressive)
+    description: >
+      OpenAI-compatible streaming facade over the Zonos engine (kept stock),
+      exposing Zonos's full expressive control surface: emotion directions
+      (happy / sad / angry / surprised) plus a valence/arousal axis pair,
+      classifier-free-guidance on emotion, accurate-vs-expressive mode,
+      speaking-rate conditioning, quality-metric targets, and the full
+      sampling stack — all reachable from named presets (neutral / warm /
+      excited / sad / intense / whisper) that seed the dials before explicit
+      overrides win. Streams s16le PCM (or a WAV wrapper) from
+      /v1/audio/speech. The LiteLLM `ext-tts` alias points at this gateway.
+    category: tts
+    version: 1
+    status: experimental
+    host: irv-ml1
+    lifecycle:
+      stack: zonos-gateway
+      vram_gb: 16
+      gpu_device_id: 0
+    endpoint: http://10.100.79.3:8890/v1/audio/speech
+    method: POST
+    content_type: application/json
+    streamable: true
+    model:
+      id: Zyphra/ZONOS2
+      revision: null
+      image: local/zonos-gateway:0.1.0
+    section_groups:
+      - id: basic
+        label: Text & voice
+      - id: expression
+        label: Expression
+        hint: Emotion conditioning. A preset seeds these; explicit dials win.
+      - id: prosody
+        label: Prosody
+        hint: Speaking-rate conditioning. Leave the enable toggles off for the model's native pacing.
+      - id: quality
+        label: Quality target
+        hint: Advanced — raw metric targets (LUFS, silence, bandlimit) Zonos buckets internally.
+      - id: sampling
+        label: Sampling
+      - id: output
+        label: Output
+    fields:
+      - name: input
+        type: textarea
+        label: Text to synthesize
+        section: basic
+        required: true
+        max_length: 5000
+        description: >
+          Text to speak. OpenAI-style `input` field; the gateway streams the
+          synthesized audio back.
+      - name: voice
+        type: select
+        label: Voice
+        section: basic
+        default: Cora
+        source_url: http://10.100.79.3:8890/v1/voices
+        source_jsonpath: $.voices[*].name
+        description: >
+          Predefined Zonos voice. Live-enumerated from /v1/voices so the list
+          auto-syncs with the deployed voice pack (Cora is the default).
+      - name: preset
+        type: select
+        label: Expressive preset
+        section: expression
+        required: false
+        options: [neutral, warm, excited, sad, intense, whisper]
+        default: neutral
+        description: >
+          Named expressive preset applied before explicit dials; any explicit
+          emotion/prosody/quality dial you set overrides the preset's value.
+      - name: emotion_enabled
+        type: bool
+        label: Enable emotion conditioning
+        section: expression
+        required: false
+        default: false
+        description: >
+          Turn emotion conditioning on. Required for the emotion_* dials to
+          bite — a preset that sets emotion turns this on for you.
+      - name: emotion_valence
+        type: slider
+        label: Valence
+        section: expression
+        min: -1.0
+        max: 1.0
+        step: 0.05
+        default: 0.0
+        description: Pleasantness axis. -1 negative, +1 positive.
+      - name: emotion_arousal
+        type: slider
+        label: Arousal
+        section: expression
+        min: -1.0
+        max: 1.0
+        step: 0.05
+        default: 0.0
+        description: Energy/activation axis. -1 calm, +1 excited.
+      - name: emotion_strength
+        type: slider
+        label: Emotion strength
+        section: expression
+        min: 0.0
+        max: 2.0
+        step: 0.05
+        default: 1.0
+        description: Overall scale on the emotion direction. 1.0 = as specified.
+      - name: emotion_cfg_scale
+        type: slider
+        label: Emotion CFG scale
+        section: expression
+        min: 1.0
+        max: 3.0
+        step: 0.1
+        default: 1.0
+        description: >
+          Classifier-free-guidance on emotion. 1.0 = off; >1 amplifies
+          expression.
+      - name: emotion_sliders
+        type: json
+        label: Per-emotion weights (advanced)
+        section: expression
+        optional: true
+        description: >
+          Advanced — per-emotion weight dict {happy|sad|angry|surprised: -1..1};
+          higher = stronger. Overrides the coarse valence/arousal directions
+          with explicit per-emotion control. Omit to use valence/arousal.
+      - name: accurate_mode
+        type: bool
+        label: Accurate mode
+        section: expression
+        required: false
+        default: true
+        description: >
+          true = faithful to the reference voice; false = more
+          expressive/looser.
+      - name: speaking_rate_enabled
+        type: bool
+        label: Enable speaking-rate conditioning
+        section: prosody
+        required: false
+        default: false
+        description: >
+          Turn speaking-rate conditioning on. Required for speed /
+          speaking_rate / speaking_rate_bucket to take effect.
+      - name: speed
+        type: slider
+        label: Speed (OpenAI-style)
+        section: prosody
+        min: 0.25
+        max: 4.0
+        step: 0.05
+        optional: true
+        description: >
+          OpenAI-style rate multiplier. Mapped to speaking_rate when no
+          explicit speaking_rate is given; auto-enables speaking-rate
+          conditioning. Omit to leave pacing native.
+      - name: speaking_rate
+        type: slider
+        label: Speaking rate (native)
+        section: prosody
+        min: 0.25
+        max: 4.0
+        step: 0.05
+        optional: true
+        description: >
+          Native speaking-rate multiplier. Overrides speed if both are sent.
+          Omit to leave pacing native.
+      - name: speaking_rate_bucket
+        type: slider
+        label: Speaking-rate bucket
+        section: prosody
+        min: 0
+        max: 7
+        step: 1
+        optional: true
+        description: >
+          Words/sec bucket index 0..7 (0 = 0-8 wps … 7 = 40+ wps). Coarser than
+          speaking_rate. Omit to leave pacing native.
+      - name: quality_enabled
+        type: bool
+        label: Enable quality-target conditioning
+        section: quality
+        required: false
+        default: true
+        description: >
+          Advanced — turn quality-target conditioning on (on by default in
+          Zonos). Gates quality_values.
+      - name: quality_values
+        type: json
+        label: Quality metric targets (advanced)
+        section: quality
+        optional: true
+        description: >
+          Advanced — raw metric targets Zonos buckets internally, e.g.
+          {lufs: -23, trailing_silence_s: 0.1}. Keys: lufs, estimated_snr,
+          max_pause, estimated_bandlimit_hz, leading_silence_s,
+          trailing_silence_s. Omit for Zonos's defaults.
+      - name: temperature
+        type: slider
+        section: sampling
+        min: 0.0
+        max: 2.0
+        step: 0.05
+        default: 1.15
+        description: Sampling temperature. Higher = more varied. Zonos default 1.15.
+      - name: top_p
+        type: slider
+        label: Top-p
+        section: sampling
+        min: 0.0
+        max: 1.0
+        step: 0.05
+        default: 0.0
+        description: Nucleus sampling cutoff. 0.0 = off (Zonos default).
+      - name: min_p
+        type: slider
+        label: Min-p
+        section: sampling
+        min: 0.0
+        max: 1.0
+        step: 0.01
+        default: 0.18
+        description: Min-p sampling floor. Zonos default 0.18.
+      - name: topk
+        type: number
+        label: Top-k
+        section: sampling
+        required: false
+        default: 106
+        description: Top-k sampling cutoff. Zonos default 106.
+      - name: seed
+        type: number
+        section: sampling
+        optional: true
+        description: >
+          RNG seed for reproducible sampling. Omit for a random seed. Pins the
+          sampler only; emotion/quality conditioning still varies subtly.
+      - name: max_tokens
+        type: number
+        label: Max audio tokens
+        section: sampling
+        required: false
+        max: 6144
+        description: >
+          Cap on generated audio tokens (upper bound; Zonos stops at
+          end-of-speech). Omit to let Zonos decide.
+      - name: response_format
+        type: select
+        label: Response format
+        section: output
+        options: [pcm, wav]
+        default: pcm
+        description: >
+          pcm = raw s16le stream (lowest latency, for API consumers); wav adds
+          a header. The stream-audition UI forces wav for the browser <audio>.
+    response:
+      type: audio
+      mime_from_field: response_format
+    reproducibility:
+      seedable: true
+      deterministic: false
+      seed_field: seed
+      notes: >
+        Temperature-sampled; seed pins the sampler but emotion/quality
+        conditioning still varies subtly run-to-run.
+    estimated_latency:
+      cold_start_s: 3
+      warm_per_unit: "streaming; first audio in a couple seconds warm, then near-realtime on the 3090"
+    license: Apache-2.0
+    notes: |
+      OpenAI-compatible streaming gateway (local/zonos-gateway:0.1.0) fronting a
+      stock Zonos engine on the 3090 (irv-ml1 device 0). The LiteLLM `ext-tts`
+      alias routes here. Fields mirror the gateway's /v1/dials schema (24 params;
+      the CATALOG-CONTRACT blessed source for defaults/ranges) and /v1/voices.
+      Deliberately omits repetition_window / repetition_penalty / codebooks — the
+      wrapper rejects them and they are the "70s of silence" footgun. Presets seed
+      the dials before explicit overrides win. New service (experimental) — flip to
+      ready after the first verified generation + browser audition through 8890.
+
 # Reproducibility audit — answers per service: (a) seedable, (b) model
 # deterministic without seed, (c) image tag mutable (security/reproducibility risk).
 reproducibility_audit:
@@ -2412,3 +2695,8 @@ reproducibility_audit:
     model_deterministic: true
     image_tag_mutable: false
     notes: "Adapter echoes the seed used (reproducibility.seed_field=seed). Byte-stable same-GPU; bf16 may drift cross-GPU. local/zonos-api:v1 built FROM local/zonos (pin ZONOS_SHA for true repro)."
+  - service: zonos-gateway
+    seedable: true
+    model_deterministic: false
+    image_tag_mutable: true
+    notes: "Seed pins the sampler (reproducibility.seed_field=seed) but emotion/quality conditioning still varies subtly run-to-run — not byte-exact. Streaming (s16le PCM / WAV). Distinct from the `zonos` adapter: this is the OpenAI-compatible gateway on :8890 behind the LiteLLM `ext-tts` alias. image local/zonos-gateway:0.1.0 is tag-pinned + mutable — pin a digest for true repro."