Add MiMo speech provider target contract

schemas/mimo-tts-request.md

@@ -0,0 +1,49 @@
+# MiMo TTS Request Contract
+
+This is the human-facing schema receipt for a Weksa-to-MiMo speech synthesis
+request projection.
+
+The packet sits after target-language utterance lowering. It is an export
+artifact for Xiaomi MiMo speech synthesis, not canonical Weksa meaning and not
+an AquaSynth handoff.
+
+## Required Fields
+
+- `schema_version`: currently `weksa.mimo_tts_request.v0`.
+- `source_realization_ref`: accepted Weksa target-language realization being
+  spoken.
+- `speaker_agent_id`: speaker identity.
+- `provider`: provider ID and model ID, initially `xiaomi-mimo` and
+  `mimo-v2.5-tts`.
+- `target_language`: code, locale, script, register, and profile refs copied or
+  referenced from the accepted realization.
+- `voice`: requested provider voice, fallback voice, and selection reason.
+- `messages.user_style_instruction`: MiMo natural-language style control derived
+  from Weksa delivery intent.
+- `messages.assistant_spoken_content`: the exact target-language content to
+  synthesize, optionally with MiMo inline tags derived from delivery controls.
+- `audio`: format and streaming mode.
+- `trace`: source fields, delivery controls used, provider tags used, and
+  uncertainties.
+
+## Boundary
+
+MiMo-specific fields must be projection fields. They must not be copied back
+into interlingua, target-language ontology, Persona state, or AquaSynth-owned
+embedding contracts.
+
+The request may include provider-native style tags when useful, but those tags
+are not the source of truth. Weksa's provider-neutral delivery intent and trace
+remain the inspectable explanation.
+
+## Language Rule
+
+The assistant spoken content must use the accepted target-language realization.
+For `pt-BR`, speak the Portuguese line. For `ja-JP`, speak the Japanese line. For
+English, speak the English line. Do not synthesize a natural backtranslation
+unless that backtranslation is itself the accepted target-language realization.
+
+## Streaming Rule
+
+Streaming requests should use MiMo's stream-compatible audio format. Non-streaming
+fixtures may use an archival format such as `wav`.

schemas/utterance-lowering-packet.md

@@ -1,7 +1,8 @@
 # Utterance Lowering Packet Contract
 
 This is the human-facing schema receipt for lowering one Weksa interlingua
-packet into one or more target-language utterance realizations.
+packet into one or more target-language utterance realizations and optional
+downstream target projections.
 
 Executable schema code does not exist yet. When it does, it must reconcile with
 this document and
@@ -30,6 +31,9 @@ It combines:
 - `projected_context_ref`: source reference for the consumed projection.
 - `lowering_controls`: constraints shared by all target lowerers.
 - `realizations`: non-empty list of target-language outputs.
+- `target_projections`: optional downstream projections derived from accepted
+  realizations, such as AquaSynth utterance embedding handoffs or MiMo TTS
+  requests.
 
 ## Target Language
 
@@ -88,3 +92,8 @@ Trace should identify:
 This packet may feed pronunciation planning or AquaSynth handoff work later, but
 it does not contain phoneme-parity, vocal-tract, reference-synth, or realtime
 voice artifacts.
+
+MiMo TTS requests are allowed as derived target projections. They must reference
+an accepted realization, speak that realization's target-language text, and keep
+provider-native style tags out of source meaning. MiMo owns rendered audio;
+Weksa owns the delivery intent and trace used to create the request.