Define speech lowering handoff

schemas/README.md

@@ -18,6 +18,11 @@ steer the machine, describe its authority here.
   contract between clients, authoring tools, and language projects.
 - [english-lowering-packet.md](./english-lowering-packet.md): packet contract
   for projecting interlingua through agent state into flavored English.
+- [english-pronunciation-plan.md](./english-pronunciation-plan.md): plan for
+  stringing flavored English into IPA/phoneme sequences before downstream speech.
+- [line-expression-vector.md](./line-expression-vector.md): learned vector
+  contract for handing prosody, emphasis, and character pressure to downstream
+  synth control.
 
 ## Source Of Truth
 

schemas/english-pronunciation-plan.md

@@ -0,0 +1,37 @@
+# English Pronunciation Plan Contract
+
+This is the human-facing schema receipt for English pronunciation plans.
+
+The plan sits after flavored-English lowering and before downstream speech
+systems such as AquaSynth.
+
+## Required Fields
+
+- `schema_version`: currently `weksa.english_pronunciation_plan.v0`.
+- `source_output_ref`: file or packet reference for the lowered English output.
+- `dialect`: pronunciation target such as `en-US-general`.
+- `orthographic_text`: final English text being pronounced.
+- `tokens`: token-level pronunciation records.
+- `ipa`: broad IPA output.
+- `trace`: decisions and uncertainties.
+
+## Token Records
+
+Each token should include:
+
+- `id`
+- `text`
+- `kind`: `word`, `punctuation`, `boundary`, or `symbol`
+- `pronunciation_source`
+- `arpabet`
+- `ipa`
+- `stress`
+- `notes`
+
+`arpabet` may be omitted for punctuation and non-CMUdict sources.
+
+## Boundary
+
+This contract does not define phonetic features, articulatory gestures, tract
+morphology, or audio. It only defines the pronunciation string and the trace that
+explains where it came from.

schemas/line-expression-vector.md

@@ -0,0 +1,32 @@
+# Line Expression Vector Contract
+
+This is the human-facing schema receipt for Weksa line-expression vectors.
+
+The vector sits after flavored-English lowering and before AquaSynth synth
+control. It is the learned representation of a character's line: meaning,
+emphasis, prosody, and delivery pressure in one compact artifact.
+
+## Required Fields
+
+- `schema_version`: currently `weksa.line_expression_vector.v0`.
+- `source_output_ref`: lowered English output reference.
+- `speaker_agent_id`: speaker identity.
+- `encoder`: model ID and version metadata.
+- `text`: spoken and normalized text.
+- `vector`: dimensionality and either inline values or `values_ref`.
+- `audit_projection`: human-readable probe of what the vector is intended to
+  preserve.
+- `trace`: notes and uncertainties.
+
+## Boundary
+
+The vector is not canonical character state. It is a derived runtime/training
+artifact.
+
+The audit projection is not the true latent space. It is a review surface for
+humans, tests, and training data.
+
+## Downstream
+
+AquaSynth may consume the vector through its own decoder. Weksa does not define
+the synth-control schema here.