A channel's message slots are named from the client, on every backend

The IR called them react-message and django-message, so a FastAPI channel had
to declare a DjangoMessage. They are client-message and server-message now,
and the direction words hold wherever a channel is declared: Params /
ClientMessage / ServerMessage, with mizan-core deriving <Pascal>Params and
friends so no backend names a type itself. Django's ReactChannel and
FastAPI's ReactChannel are both Channel.

mizan-fastapi never registered a channels extension, so build_ir() emitted no
channel at all and every payload type was invisible to codegen. It registers
one now. RegistryExtension is an ABC requiring all(), which is what the IR
reads — an extension that cannot enumerate its registrations no longer exists.

The gate that should have caught the rename could not: tests/afi registered no
channel because mizan-rust had no channel registry to register one in, so a
five-package rename of the wire contract passed byte-parity without a channel
byte crossing it. mizan-rust grows ChannelSlotKind, a CHANNELS slice, a
#[mizan::channel] macro, and KDL emission whose wire_to_pascal matches Python's
split; the AFI fixture now carries a channel with every slot and one with a
single slot, so all three backends prove the contract byte for byte.

MizanChannel held three Option<String> beside three has_*() predicates and
unwrapped them with defaults; it holds an ordered slot vector, so an absent
slot is absent rather than defaulted. The channels target emitted a React
hooks file that a stage1-only consumer could not compile — react emits that
now. The codegen's parity tests byte-compared emitted source against baselines
without ever compiling it: they compile the generated crate and run its tests,
import the generated Python package and call every method, and typecheck each
TypeScript target against a consumer.

Also fixed at source: app_visitor printed its import diagnostic to stdout, the
stream export_mizan_ir writes KDL to, so a failed import silently corrupted the
IR; the apps root was hardcoded to "apps"; _default_literal crashed build_ir on
any non-JSON-serializable field default; Django and mizan-core derived Pascal
names two different ways, disagreeing on every dotted channel name.

ir.py builds a document and renders templates/ir/document.kdl.j2 rather than
appending KDL strings with hand-tracked indentation, and named types resolve to
a fixed point — a model reachable only through a union branch was referenced by
a ref that no type block ever defined.

The rest is the write-gate's own classifiers run over the standing tree:
relative imports, silent swallows, Protocol contracts that should be ABCs,
emitters hand-rendering target source, catch-all arms over closed enums, and
comments narrating the project rather than the code.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

protocol/mizan-codegen/templates/channels/channels.hooks.tsx.j2

@@ -1,26 +1,20 @@
 'use client'
 
-// AUTO-GENERATED by mizan — do not edit
-
 import { useChannel, type ChannelSubscription } from 'mizan/channels'
 
 {% if !type_imports.is_empty() -%}
 import type { {{ type_imports|join(", ") }} } from './channels'
 
 {% endif -%}
-// ── Channel Hooks ─────────────────────────────────────────────────────────
-
-{% for ch in channels -%}
-/**
- * Hook for the {{ ch.name }} channel.
- */
-{% if ch.has_params -%}
-export function use{{ ch.pascal_name }}Channel(params: {{ ch.params_type_or_record }}): ChannelSubscription<{{ ch.params_type_or_record }}, {{ ch.django_msg_type_or_never }}, {{ ch.react_msg_type_or_never }}> {
+{% for ch in param_channels -%}
+export function use{{ ch.pascal_name }}Channel(params: {{ ch.params_type }}): ChannelSubscription<{{ ch.params_type }}, {{ ch.server_message_type }}, {{ ch.client_message_type }}> {
     return useChannel('{{ ch.name }}', params)
 }
-{% else -%}
-export function use{{ ch.pascal_name }}Channel(): ChannelSubscription<Record<string, never>, {{ ch.django_msg_type_or_never }}, {{ ch.react_msg_type_or_never }}> {
+
+{% endfor -%}
+{% for ch in paramless_channels -%}
+export function use{{ ch.pascal_name }}Channel(): ChannelSubscription<Record<string, never>, {{ ch.server_message_type }}, {{ ch.client_message_type }}> {
     return useChannel('{{ ch.name }}', {})
 }
-{% endif %}
+
 {% endfor -%}

protocol/mizan-codegen/templates/channels/channels.ts.j2

@@ -1,25 +1,15 @@
-// AUTO-GENERATED by mizan — do not edit
+{% for schema in schemas %}{{ schema }}{% if !loop.last %}
 
-{{ schemas_block }}
-// ── Channel Registry ──────────────────────────────────────────────────────
+{% endif %}{% endfor %}
 
 export const CHANNELS = {
 {%- for ch in channels %}
-    {{ ch.name }}: {
+    '{{ ch.name }}': {
         name: '{{ ch.name }}',
         pascalName: '{{ ch.pascal_name }}',
-        hasParams: {{ ch.has_params }},
-        hasReactMessage: {{ ch.has_react_message }},
-        hasDjangoMessage: {{ ch.has_django_message }},
-{%- if ch.has_params %}
-        paramsType: '{{ ch.params_type }}',
-{%- endif %}
-{%- if ch.has_react_message %}
-        reactMessageType: '{{ ch.react_message_type }}',
-{%- endif %}
-{%- if ch.has_django_message %}
-        djangoMessageType: '{{ ch.django_message_type }}',
-{%- endif %}
+{%- for slot in ch.slots %}
+        {{ slot.registry_key }}: '{{ slot.type_name }}',
+{%- endfor %}
     },
 {%- endfor %}
 } as const

protocol/mizan-codegen/templates/decoru/enum.rs.j2

@@ -0,0 +1,7 @@
+#[derive({% for d in derives %}{% if !loop.first %}, {% endif %}{{ d }}{% endfor %})]
+#[serde(rename_all = "snake_case")]
+pub enum {{ name }} {
+{% for v in variants %}{% if v.is_default %}    #[default]
+{% endif %}    {{ v.ident }},
+{% endfor %}}
+

protocol/mizan-codegen/templates/decoru/schema.rs.j2

@@ -0,0 +1,2 @@
+{{ header }}{% for block in blocks %}{{ block }}{% if !loop.last %}
+{% endif %}{% endfor %}

protocol/mizan-codegen/templates/python/__init__.py.j2

@@ -1,5 +1,3 @@
-# AUTO-GENERATED by mizan — do not edit
-
 from .client import MizanClient  # noqa: F401
 from .types import *  # noqa: F401, F403
 

protocol/mizan-codegen/templates/python/client.py.j2

@@ -1,5 +1,3 @@
-# AUTO-GENERATED by mizan — do not edit
-
 from __future__ import annotations
 
 from collections.abc import Callable
@@ -25,8 +23,19 @@ class MizanClient:
             csrf_header_name=csrf_header_name,
         )
 
-{{ ctx_methods_block }}
-{{ call_methods_block }}
+{% for ctx in contexts %}    def fetch_{{ ctx.snake }}_context(self{% for p in ctx.params %}, {{ p.ident }}: {{ p.ty }}{% if !p.required %} | None = None{% endif %}{% endfor %}) -> "{{ ctx.data_class }}":
+        raw = self._inner.fetch_context("{{ ctx.name }}", {{ "{" }}{% for p in ctx.params %}{% if !loop.first %}, {% endif %}"{{ p.raw_name }}": {{ p.ident }}{% endfor %}{{ "}" }})
+        return {{ ctx.data_class }}(**raw)
+    def subscribe_{{ ctx.snake }}_context(self{% for p in ctx.params %}, {{ p.ident }}: {{ p.ty }}{% if !p.required %} | None = None{% endif %}{% endfor %},
+                                       callback: Callable[[dict[str, Any]], None]) -> PyContextSubscription:
+        return self._inner.subscribe_context("{{ ctx.name }}", {{ "{" }}{% for p in ctx.params %}{% if !loop.first %}, {% endif %}"{{ p.raw_name }}": {{ p.ident }}{% endfor %}{{ "}" }}, callback)
+{% if !loop.last %}
+{% endif %}{% endfor %}
+{% for call in calls %}    def call_{{ call.snake }}(self{% match call.input %}{% when CallInput::Typed with (t) %}, args: {{ crate::emit::casing::pascal_case(t) }}{% when CallInput::Absent %}{% endmatch %}) -> {{ call.output }}{% if call.nullable %} | None{% endif %}:
+        raw = self._inner.call("{{ call.wire_name }}", {% match call.input %}{% when CallInput::Typed with (t) %}args.model_dump(){% when CallInput::Absent %}{}{% endmatch %})
+        return {{ call.output }}(**raw){% if call.nullable %} if raw is not None else None{% endif %}
+{% if !loop.last %}
+{% endif %}{% endfor %}
     def invalidate(self, context: str) -> None:
         self._inner.invalidate(context)
 
@@ -34,6 +43,8 @@ class MizanClient:
         self._inner.invalidate_scoped(context, params)
 
 
-# ── Context data shapes (per-context bundle) ──────────────────────────────
-
-{{ data_classes_block }}
+{% for dc in data_classes %}class {{ dc.class_name }}(BaseModel):
+    """Bundled return of fetch_{{ dc.snake }}_context."""
+{% for f in dc.fields %}    {{ f.ident }}: {{ f.ty }}{% if f.nullable %} | None{% endif %}
+{% endfor %}{% if !loop.last %}
+{% endif %}{% endfor %}

protocol/mizan-codegen/templates/python/schema.py.j2

@@ -0,0 +1,17 @@
+{%- match kind -%}
+{%- when PySchemaKind::Class with (fields) -%}
+class {{ name }}(BaseModel):
+{%- if fields.is_empty() %}
+    pass
+{%- else %}
+{%- for f in fields %}
+    {{ f.ident }}: {{ f.ty }}{% if f.append_none %} | None{% endif %}{% if f.optional %} = None{% endif %}
+{%- endfor %}
+{%- endif %}
+{%- when PySchemaKind::ListOf with (inner) -%}
+{{ name }} = list[{{ crate::emit::python::py_type(inner) }}]
+{%- when PySchemaKind::Literal with (variants) -%}
+{{ name }} = Literal[{% for v in variants %}{% if !loop.first %}, {% endif %}"{{ v }}"{% endfor %}]
+{%- when PySchemaKind::Alias with (inner) -%}
+{{ name }} = {{ crate::emit::python::py_type(inner) }}
+{%- endmatch -%}

protocol/mizan-codegen/templates/python/type_expr.py.j2

@@ -0,0 +1,14 @@
+{%- match shape -%}
+{%- when TypeShape::Ref with (name) -%}
+{{ crate::emit::casing::pascal_case(name) }}
+{%- when TypeShape::Primitive with (p) -%}
+{{ crate::emit::python::primitive_to_py(p) }}
+{%- when TypeShape::List with (inner) -%}
+list[{{ crate::emit::python::py_type(inner) }}]
+{%- when TypeShape::Optional with (inner) -%}
+{{ crate::emit::python::py_type(inner) }} | None
+{%- when TypeShape::Enum with (variants) -%}
+Literal[{% for v in variants %}{% if !loop.first %}, {% endif %}"{{ v }}"{% endfor %}]
+{%- when TypeShape::Union with (branches) -%}
+{% for b in branches %}{% if !loop.first %} | {% endif %}{{ crate::emit::python::py_type(b) }}{% endfor %}
+{%- endmatch -%}

protocol/mizan-codegen/templates/python/types.py.j2

@@ -1,10 +1,9 @@
-# AUTO-GENERATED by mizan — do not edit
-
 from __future__ import annotations
 
 from typing import Any, Literal
 
 from pydantic import BaseModel
 
-{{ schemas_block }}
-
+{% for schema in schemas %}{{ schema }}
+{% if !loop.last %}
+{% endif %}{% endfor %}

protocol/mizan-codegen/templates/react/react.tsx.j2

@@ -1,7 +1,5 @@
 'use client'
 
-// AUTO-GENERATED by mizan — do not edit
-
 {% set has_contexts = has_global || !named_contexts.is_empty() -%}
 import {
     {% if has_contexts -%}
@@ -30,11 +28,14 @@ import {
 } from '@mizan/base'
 
 {% if !stage1_imports.is_empty() -%}
-import { {{ stage1_imports|join(", ") }} } from './index'
+import {
+{%- for p in stage1_imports.contexts %} fetch{{ p }}Context, type {{ p }}ContextData, type {{ p }}ContextParams,{% endfor %}
+{%- for p in stage1_imports.calls %} call{{ p }},{% endfor %}
+{%- for t in stage1_imports.context_output_types %} type {{ t }},{% endfor %} } from './index'
 
 {% endif -%}
 {% if has_contexts -%}
-// Internal — runs inside a Provider, registers with the kernel exactly once.
+// Runs inside a Provider, registers with the kernel exactly once.
 function useContextSubscription<T>(
     name: string,
     params: Record<string, any>,
@@ -56,7 +57,7 @@ function useContextSubscription<T>(
 }
 {% endif %}
 
-// Internal — wraps an imperative call() with isPending / error state.
+// Wraps an imperative call() with isPending / error state.
 interface MutationHook<TArgs, TResult> {
     mutate: (args: TArgs) => Promise<TResult>
     isPending: boolean
@@ -85,8 +86,6 @@ function useMutation<TArgs, TResult>(
     return { mutate, isPending, error }
 }
 {% if has_global %}
-// ── Global Context ──
-
 const GlobalCtx = createContext<ContextState<GlobalContextData> | null>(null)
 
 export function GlobalContextProvider({ children }: { children: ReactNode }) {
@@ -107,8 +106,6 @@ export function use{{ fn.pascal }}(): {{ fn.output_type }} | null {
 {% endfor -%}
 {% endif -%}
 {% for ctx in named_contexts %}
-// ── {{ ctx.pascal }} Context ──
-
 const {{ ctx.pascal }}Ctx = createContext<ContextState<{{ ctx.pascal }}ContextData> | null>(null)
 
 {% if ctx.has_params -%}
@@ -144,8 +141,6 @@ export function use{{ call.pascal }}() {
 }
 {% endif -%}
 {% endfor %}
-// ── MizanContext root provider ──
-
 export interface MizanContextProps {
     /** Base URL for protocol endpoints. Defaults to "/api/mizan". */
     baseUrl?: string
@@ -155,8 +150,8 @@ export interface MizanContextProps {
 }
 
 /**
- * Root provider — calls configure() once and mounts the global context (if defined).
- * Must wrap any component using Mizan-generated hooks.
+ * Calls configure() once and mounts the global context when one is defined.
+ * Every component reading a generated hook resolves through this provider.
  */
 export function MizanContext({ baseUrl, session, children }: MizanContextProps) {
     const configured = useRef(false)
@@ -174,12 +169,7 @@ export function MizanContext({ baseUrl, session, children }: MizanContextProps)
 {%- endif %}
 }
 
-// ── Imperative escape hatch ──
-
-/**
- * Returns the imperative kernel API. For test harnesses or rare cases where
- * a typed generated hook does not fit. Most app code should use the typed hooks.
- */
+/** The untyped kernel entry points, bound to the configured client. */
 export function useMizan() {
     return { call: mizanCall, fetch: mizanFetch }
 }

protocol/mizan-codegen/templates/rust/Cargo.toml.j2

@@ -4,7 +4,7 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-mizan-rust = {{ kernel_dep }}
+mizan-rust = { {% for kv in kernel_dep %}{% if !loop.first %}, {% endif %}{{ kv.key }} = "{{ kv.value }}"{% endfor %} }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 tokio = { version = "1", features = ["rt", "macros"] }

protocol/mizan-codegen/templates/rust/call.rs.j2

@@ -1,15 +1,12 @@
-// AUTO-GENERATED by mizan — do not edit
-
-use serde_json::Value;
-
 use mizan_rust::{MizanClient, MizanError};
 
 {% if !type_imports.is_empty() -%}
 use crate::types::{ {{- type_imports|join(", ") -}} };
 
 {% endif -%}
-pub async fn call_{{ snake }}(client: &MizanClient{{ input_param }}) -> Result<{{ return_type }}, MizanError> {
-    let args_value = {{ args_value }};
+pub async fn call_{{ snake }}(client: &MizanClient{% match input %}{% when CallInput::Typed with (t) %}, args: &{{ crate::emit::casing::rust_type_ident(t) }}{% when CallInput::Absent %}{% endmatch %}) -> Result<{% if nullable %}Option<{{ output_type }}>{% else %}{{ output_type }}{% endif %}, MizanError> {
+    let args_value = {% match input %}{% when CallInput::Typed with (t) %}serde_json::to_value(args)
+        .map_err(|e| MizanError::transport(format!("encode {{ name }} args: {e}")))?{% when CallInput::Absent %}serde_json::Value::Object(Default::default()){% endmatch %};
     let raw = client.call("{{ name }}", args_value).await?;
     serde_json::from_value(raw)
         .map_err(|e| MizanError::transport(format!("decode {{ name }} result: {e}")))

protocol/mizan-codegen/templates/rust/context.rs.j2

@@ -1,7 +1,4 @@
-// AUTO-GENERATED by mizan — do not edit
-
 use serde::{Deserialize, Serialize};
-use serde_json::Value;
 
 use mizan_rust::{MizanClient, MizanError};
 
@@ -12,16 +9,16 @@ use crate::types::{ {{- type_imports|join(", ") -}} };
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct {{ pascal }}ContextData {
 {% for field in data_fields -%}
-{% if field.has_rename %}    #[serde(rename = "{{ field.raw_name }}")]
-{% endif %}    pub {{ field.ident }}: {{ field.ty }},
+{% if field.has_rename %}    #[serde(rename = "{{ field.wire_name }}")]
+{% endif %}    pub {{ field.ident }}: {% if field.optional %}Option<{{ field.ty }}>{% else %}{{ field.ty }}{% endif %},
 {% endfor -%}
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct {{ pascal }}ContextParams {
 {% for p in params -%}
-{% if p.has_rename %}    #[serde(rename = "{{ p.raw_name }}")]
-{% endif %}    pub {{ p.ident }}: {{ p.ty }},
+{% if p.has_rename %}    #[serde(rename = "{{ p.wire_name }}")]
+{% endif %}    pub {{ p.ident }}: {% if p.optional %}Option<{{ p.ty }}>{% else %}{{ p.ty }}{% endif %},
 {% endfor -%}
 }
 
@@ -29,7 +26,8 @@ pub async fn fetch_{{ snake }}_context(
     client: &MizanClient,
     params: &{{ pascal }}ContextParams,
 ) -> Result<{{ pascal }}ContextData, MizanError> {
-    let params_value = serde_json::to_value(params).unwrap_or(Value::Object(Default::default()));
+    let params_value = serde_json::to_value(params)
+        .map_err(|e| MizanError::transport(format!("encode {{ ctx_name }} context params: {e}")))?;
     let raw = client.fetch_context("{{ ctx_name }}", &params_value).await?;
     serde_json::from_value(raw)
         .map_err(|e| MizanError::transport(format!("decode {{ ctx_name }} context: {e}")))

protocol/mizan-codegen/templates/rust/lib.rs.j2

@@ -1,5 +1,3 @@
-// AUTO-GENERATED by mizan — do not edit
-
 pub mod types;
 {% if has_contexts %}pub mod contexts;
 {% endif %}{% if has_mutations %}pub mod mutations;

protocol/mizan-codegen/templates/rust/mod.rs.j2

@@ -1,5 +1,3 @@
-// AUTO-GENERATED by mizan — do not edit
-
 {% for name in modules -%}
 pub mod {{ name }};
 {% endfor %}

protocol/mizan-codegen/templates/rust/schema.rs.j2

@@ -0,0 +1,20 @@
+{%- match kind -%}
+{%- when RustSchemaKind::Struct with (fields) -%}
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct {{ name }} {
+{% for f in fields %}{% if f.has_rename %}    #[serde(rename = "{{ f.wire_name }}")]
+{% endif %}    pub {{ f.ident }}: {{ f.ty }},
+{% endfor %}}
+{%- when RustSchemaKind::StringEnum with (variants) -%}
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub enum {{ name }} {
+{% for v in variants %}{% if v.has_rename %}    #[serde(rename = "{{ v.wire_name }}")]
+{% endif %}    {{ v.ident }},
+{% endfor %}}
+{%- when RustSchemaKind::TransparentArray with (inner) -%}
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(transparent)]
+pub struct {{ name }}(pub Vec<{{ inner }}>);
+{%- when RustSchemaKind::Alias with (inner) -%}
+pub type {{ name }} = {{ inner }};
+{%- endmatch -%}

protocol/mizan-codegen/templates/rust/type_expr.rs.j2

@@ -0,0 +1,10 @@
+{%- match shape -%}
+{%- when RustShape::Named with (name) -%}
+{{ name }}
+{%- when RustShape::List with (inner) -%}
+Vec<{{ crate::emit::rust::rust_type(inner) }}>
+{%- when RustShape::Optional with (inner) -%}
+Option<{{ crate::emit::rust::rust_type(inner) }}>
+{%- when RustShape::Json -%}
+serde_json::Value
+{%- endmatch -%}

protocol/mizan-codegen/templates/rust/types.rs.j2

@@ -1,8 +1,9 @@
-// AUTO-GENERATED by mizan — do not edit
-
 #![allow(non_camel_case_types)]
 
 use serde::{Deserialize, Serialize};
 
-{{ schemas_block }}
-{{ hoisted_enums_block }}
+{% for schema in schemas %}{{ schema }}
+
+{% endfor %}{% for hoisted in hoisted_enums %}{{ hoisted }}
+{% if !loop.last %}
+{% endif %}{% endfor %}

protocol/mizan-codegen/templates/stage1/call.ts.j2

@@ -1,17 +1,15 @@
-// AUTO-GENERATED by mizan — do not edit
-
 import { mizanCall } from '@mizan/base'
 
 {% if !type_imports.is_empty() -%}
 import type { {{ type_imports|join(", ") }} } from '../types'
 
 {% endif -%}
-{% if has_input -%}
-export function call{{ pascal }}(args: {{ input_type }}): Promise<{{ output_type }}> {
+{% match input %}{% when CallInput::Typed with (t) -%}
+export function call{{ pascal }}(args: {{ t }}): Promise<{{ output_type }}> {
     return mizanCall('{{ name }}', args)
 }
-{% else -%}
+{% when CallInput::Absent -%}
 export function call{{ pascal }}(): Promise<{{ output_type }}> {
     return mizanCall('{{ name }}', {})
 }
-{% endif %}
+{% endmatch %}

protocol/mizan-codegen/templates/stage1/context.ts.j2

@@ -1,5 +1,3 @@
-// AUTO-GENERATED by mizan — do not edit
-
 import { mizanFetch } from '@mizan/base'
 
 {% if !type_imports.is_empty() -%}

protocol/mizan-codegen/templates/stage1/index.ts.j2

@@ -1,5 +1,3 @@
-// AUTO-GENERATED by mizan — do not edit
-
 export * from './types'
 {% if !contexts.is_empty() %}
 {%- for ctx in contexts %}
@@ -12,7 +10,6 @@ export { call{{ call.pascal }} } from './{{ call.dir }}/{{ call.camel_name }}'
 {%- endfor %}
 {% endif -%}
 {% if !framework_adapters.is_empty() %}
-// Stage 2 framework adapter
 {%- for name in framework_adapters %}
 export * from './{{ name }}'
 {%- endfor %}

protocol/mizan-codegen/templates/stage1/schema.ts.j2

@@ -0,0 +1,16 @@
+{%- match kind -%}
+{%- when TsSchemaKind::Interface with (fields) -%}
+{%- if fields.is_empty() -%}
+export interface {{ name }} {}
+{%- else -%}
+export interface {{ name }} {
+{% for f in fields %}    {{ f.name }}{% if !f.required %}?{% endif %}: {{ f.ty }}
+{% endfor %}}
+{%- endif -%}
+{%- when TsSchemaKind::ArrayOf with (inner) -%}
+export type {{ name }} = {{ crate::emit::stage1::ts_type(inner) }}[]
+{%- when TsSchemaKind::Union with (variants) -%}
+export type {{ name }} = {% for v in variants %}{% if !loop.first %} | {% endif %}"{{ v }}"{% endfor %}
+{%- when TsSchemaKind::Alias with (inner) -%}
+export type {{ name }} = {{ crate::emit::stage1::ts_type(inner) }}
+{%- endmatch -%}

protocol/mizan-codegen/templates/stage1/type_expr.ts.j2

@@ -0,0 +1,14 @@
+{%- match shape -%}
+{%- when TypeShape::Ref with (name) -%}
+{{ name }}
+{%- when TypeShape::Primitive with (p) -%}
+{{ crate::emit::stage1::primitive_to_ts(p) }}
+{%- when TypeShape::List with (inner) -%}
+{{ crate::emit::stage1::ts_type(inner) }}[]
+{%- when TypeShape::Optional with (inner) -%}
+{{ crate::emit::stage1::ts_type(inner) }} | null
+{%- when TypeShape::Enum with (variants) -%}
+{% for v in variants %}{% if !loop.first %} | {% endif %}"{{ v }}"{% endfor %}
+{%- when TypeShape::Union with (branches) -%}
+{% for b in branches %}{% if !loop.first %} | {% endif %}{{ crate::emit::stage1::ts_type(b) }}{% endfor %}
+{%- endmatch -%}

protocol/mizan-codegen/templates/stage1/types.ts.j2

@@ -0,0 +1,3 @@
+{% for schema in schemas %}{{ schema }}
+
+{% endfor %}

protocol/mizan-codegen/templates/svelte/svelte.ts.j2

@@ -1,10 +1,11 @@
-// AUTO-GENERATED by mizan — do not edit
-
 import { readable, type Readable } from 'svelte/store'
 import { registerContext, type ContextState } from '@mizan/base'
 
 {% if !stage1_imports.is_empty() -%}
-import { {{ stage1_imports|join(", ") }} } from '../index'
+import {
+{%- for p in stage1_imports.contexts %} fetch{{ p }}Context, type {{ p }}ContextData, type {{ p }}ContextParams,{% endfor %}
+{%- for p in stage1_imports.calls %} call{{ p }},{% endfor %}
+{%- for t in stage1_imports.context_output_types %} type {{ t }},{% endfor %} } from '../index'
 
 {% endif -%}
 {% for ctx in contexts -%}

protocol/mizan-codegen/templates/vue/vue.ts.j2

@@ -1,10 +1,11 @@
-// AUTO-GENERATED by mizan — do not edit
-
 import { ref, computed, onMounted, onUnmounted, onServerPrefetch, type ComputedRef } from 'vue'
 import { registerContext, type ContextState } from '@mizan/base'
 
 {% if !stage1_imports.is_empty() -%}
-import { {{ stage1_imports|join(", ") }} } from '../index'
+import {
+{%- for p in stage1_imports.contexts %} fetch{{ p }}Context, type {{ p }}ContextData, type {{ p }}ContextParams,{% endfor %}
+{%- for p in stage1_imports.calls %} call{{ p }},{% endfor %}
+{%- for t in stage1_imports.context_output_types %} type {{ t }},{% endfor %} } from '../index'
 
 {% endif -%}
 {% for ctx in contexts -%}