Mizan IR: cut over to KDL, delete OpenAPI envelope

Replaces the transitional OpenAPI 3.0 + `x-mizan-*` extensions
substrate with the canonical Mizan IR as KDL, per docs/AFI_ARCHITECTURE.md:
"KDL is the contract; everything else (REST envelopes, OpenAPI
documents, framework idioms) is sediment around it."

End-to-end cutover. No transitional path left on main.

Forward direction:
  cores/mizan-python/src/mizan_core/ir.py
    build_ir() walks mizan_core.registry, introspects Pydantic
    models directly (no JSON-Schema indirection), and emits the
    Mizan IR document. The KDL grammar is locked in this file's
    module docstring.

Backends emit KDL:
  backends/mizan-fastapi/src/mizan_fastapi/ir.py
    `python -m mizan_fastapi.ir <module>` — CLI entry point.
  backends/mizan-django/.../management/commands/export_mizan_ir.py
    `manage.py export_mizan_ir` — Django mgmt command.

Codegen consumes KDL:
  protocol/mizan-codegen/Cargo.toml: + kdl = "6"
  protocol/mizan-codegen/src/ir.rs: NamedType { Struct/List/Enum/Alias }
    + TypeShape { Primitive/Ref/List/Optional/Enum/Union } sum types,
    replacing the JsonSchema sprawl. KDL parser walks the
    `kdl::KdlDocument` tree into typed Rust structs.
  protocol/mizan-codegen/src/fetch.rs: subprocess command switches
    to the new IR-export entry points.
  All emit modules (stage1 / react / python / rust / vue / svelte /
    channels) port their type-walkers from JsonSchema to the new
    sum types — case analysis collapses substantially.

Substrate-honesty wins beyond the moat closure:
  - `int | bool` multi-arm unions land as `TypeShape::Union` (was
    silently coerced to "string" before).
  - `<CamelName>Output = list[T]` returns emit as named alias
    types instead of struct-shaped wrappers, so consumer code
    `.map()` works directly on the type.
  - Pydantic field defaults flow through to `default` properties
    in KDL, then back to non-optional shape in every target.

Deleted:
  - backends/mizan-fastapi/src/mizan_fastapi/{cli,schema}.py
  - backends/mizan-django/.../export_mizan_schema.py
  - openapi-bearing half of mizan/export/__init__.py (edge
    manifest generator preserved — separate concern).
  - tests/afi/schema_normalizer.py
  - tests/fixtures/{afi_schema.json, channels_schema.json}
  - tests/fixtures/js_* baseline directories.

Verification:
  - 20 mizan-codegen unit tests green (IR deserialization,
    byte-equivalence parity across stage1/rust/python/react/vue/svelte
    against fresh KDL-driven baselines, channels structural).
  - tests/rust/run_wire_parity.py: 12/12 probes green driving
    the binary end-to-end through KDL.
  - Blazr studio-ui typechecks against the regenerated React client.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

protocol/mizan-codegen/tests/fixtures/baselines/python/__init__.py

@@ -0,0 +1,4 @@
+# AUTO-GENERATED by mizan — do not edit
+
+from .client import MizanClient  # noqa: F401
+from .types import *  # noqa: F401, F403

protocol/mizan-codegen/tests/fixtures/baselines/python/client.py

@@ -0,0 +1,67 @@
+# AUTO-GENERATED by mizan — do not edit
+
+from __future__ import annotations
+
+from collections.abc import Callable
+from typing import Any
+
+# Built from frontends/mizan-rust with `maturin develop --features pyo3`.
+from mizan_rust import PyMizanClient, PyContextSubscription
+
+from .types import *  # noqa: F401, F403
+from .types import BaseModel  # re-import for the synthesized ContextData classes
+
+
+class MizanClient:
+    """Typed Python facade over the PyO3 mizan-rust kernel."""
+
+    def __init__(self, base_url: str, *, session: bool = False,
+                 csrf_cookie_name: str = "csrftoken",
+                 csrf_header_name: str = "X-CSRFToken") -> None:
+        self._inner = PyMizanClient(
+            base_url,
+            session=session,
+            csrf_cookie_name=csrf_cookie_name,
+            csrf_header_name=csrf_header_name,
+        )
+
+    def fetch_user_context(self, user_id: int) -> "UserContextData":
+        raw = self._inner.fetch_context("user", {"user_id": user_id})
+        return UserContextData(**raw)
+    def subscribe_user_context(self, user_id: int,
+                                       callback: Callable[[dict[str, Any]], None]) -> PyContextSubscription:
+        return self._inner.subscribe_context("user", {"user_id": user_id}, callback)
+
+    def call_echo(self, args: EchoInput) -> EchoOutput:
+        raw = self._inner.call("echo", args.model_dump())
+        return EchoOutput(**raw)
+
+    def call_whoami(self) -> WhoamiOutput:
+        raw = self._inner.call("whoami", {})
+        return WhoamiOutput(**raw)
+
+    def call_update_profile(self, args: UpdateProfileInput) -> UpdateProfileOutput:
+        raw = self._inner.call("update_profile", args.model_dump())
+        return UpdateProfileOutput(**raw)
+
+    def call_find_user(self, args: FindUserInput) -> FindUserOutput | None:
+        raw = self._inner.call("find_user", args.model_dump())
+        return FindUserOutput(**raw) if raw is not None else None
+
+    def call_rename_user(self, args: RenameUserInput) -> RenameUserOutput:
+        raw = self._inner.call("rename_user", args.model_dump())
+        return RenameUserOutput(**raw)
+
+    def invalidate(self, context: str) -> None:
+        self._inner.invalidate(context)
+
+    def invalidate_scoped(self, context: str, params: dict[str, Any]) -> None:
+        self._inner.invalidate_scoped(context, params)
+
+
+# ── Context data shapes (per-context bundle) ──────────────────────────────
+
+class UserContextData(BaseModel):
+    """Bundled return of fetch_user_context."""
+    user_profile: UserProfileOutput
+    user_orders: UserOrdersOutput

protocol/mizan-codegen/tests/fixtures/baselines/python/types.py

@@ -0,0 +1,56 @@
+# AUTO-GENERATED by mizan — do not edit
+
+from __future__ import annotations
+
+from typing import Any, Literal
+
+from pydantic import BaseModel
+
+class OrderOutput(BaseModel):
+    id: int
+    user_id: int
+    total: int
+
+class EchoInput(BaseModel):
+    text: str
+
+class EchoOutput(BaseModel):
+    message: str
+
+class FindUserInput(BaseModel):
+    user_id: int
+
+class FindUserOutput(BaseModel):
+    user_id: int
+    name: str
+
+class RenameUserInput(BaseModel):
+    user_id: int
+    name: str
+
+class RenameUserOutput(BaseModel):
+    user_id: int
+    name: str
+
+class UpdateProfileInput(BaseModel):
+    user_id: int
+    name: str
+
+class UpdateProfileOutput(BaseModel):
+    ok: bool
+
+class UserOrdersInput(BaseModel):
+    user_id: int
+
+UserOrdersOutput = list[OrderOutput]
+
+class UserProfileInput(BaseModel):
+    user_id: int
+
+class UserProfileOutput(BaseModel):
+    user_id: int
+    name: str
+
+class WhoamiOutput(BaseModel):
+    email: str
+    authenticated: bool

protocol/mizan-codegen/tests/fixtures/baselines/react/contexts/user.ts

@@ -0,0 +1,18 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanFetch } from '@mizan/base'
+
+import type { userProfileOutput, userOrdersOutput } from '../types'
+
+export interface UserContextData {
+    user_profile: userProfileOutput
+    user_orders: userOrdersOutput
+}
+
+export interface UserContextParams {
+    user_id: number
+}
+
+export function fetchUserContext(params: UserContextParams): Promise<UserContextData> {
+    return mizanFetch('user', params)
+}

protocol/mizan-codegen/tests/fixtures/baselines/react/functions/echo.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { echoInput, echoOutput } from '../types'
+
+export function callEcho(args: echoInput): Promise<echoOutput> {
+    return mizanCall('echo', args)
+}

protocol/mizan-codegen/tests/fixtures/baselines/react/functions/findUser.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { findUserInput, findUserOutput } from '../types'
+
+export function callFindUser(args: findUserInput): Promise<findUserOutput> {
+    return mizanCall('find_user', args)
+}

protocol/mizan-codegen/tests/fixtures/baselines/react/functions/renameUser.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { renameUserInput, renameUserOutput } from '../types'
+
+export function callRenameUser(args: renameUserInput): Promise<renameUserOutput> {
+    return mizanCall('rename_user', args)
+}

protocol/mizan-codegen/tests/fixtures/baselines/react/functions/whoami.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { whoamiOutput } from '../types'
+
+export function callWhoami(): Promise<whoamiOutput> {
+    return mizanCall('whoami', {})
+}

protocol/mizan-codegen/tests/fixtures/baselines/react/index.ts

@@ -0,0 +1,14 @@
+// AUTO-GENERATED by mizan — do not edit
+
+export * from './types'
+
+export { fetchUserContext, type UserContextData, type UserContextParams } from './contexts/user'
+
+export { callEcho } from './functions/echo'
+export { callWhoami } from './functions/whoami'
+export { callUpdateProfile } from './mutations/updateProfile'
+export { callFindUser } from './functions/findUser'
+export { callRenameUser } from './functions/renameUser'
+
+// Stage 2 framework adapter
+export * from './react'

protocol/mizan-codegen/tests/fixtures/baselines/react/mutations/updateProfile.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { updateProfileInput, updateProfileOutput } from '../types'
+
+export function callUpdateProfile(args: updateProfileInput): Promise<updateProfileOutput> {
+    return mizanCall('update_profile', args)
+}

protocol/mizan-codegen/tests/fixtures/baselines/react/react.tsx

@@ -0,0 +1,157 @@
+'use client'
+
+// AUTO-GENERATED by mizan — do not edit
+
+import {
+    createContext,
+    useCallback,
+    useContext,
+    useEffect,
+    useRef,
+    useState,
+    useSyncExternalStore,
+    type ReactNode,
+} from 'react'
+import {
+    configure,
+    initSession,
+    mizanCall,
+    mizanFetch,
+    MizanError,
+    registerContext,
+    type ContextState,
+} from '@mizan/base'
+
+import { fetchUserContext, type UserContextData, type UserContextParams, callUpdateProfile, callEcho, callWhoami, callFindUser, callRenameUser, type userProfileOutput, type userOrdersOutput } from './index'
+
+// Internal — runs inside a Provider, registers with the kernel exactly once.
+function useContextSubscription<T>(
+    name: string,
+    params: Record<string, any>,
+    fetchFn: () => Promise<T>,
+    initialData?: T,
+): ContextState<T> {
+    const ref = useRef<ReturnType<typeof registerContext> | null>(null)
+    if (!ref.current) {
+        ref.current = registerContext(name, params, fetchFn, initialData)
+    }
+    const handle = ref.current
+
+    useEffect(() => {
+        if (handle.getState().status === 'idle') handle.refetch()
+        return () => handle.unregister()
+    }, [handle])
+
+    return useSyncExternalStore(handle.subscribe, handle.getState, handle.getState)
+}
+
+// Internal — wraps an imperative call() with isPending / error state.
+interface MutationHook<TArgs, TResult> {
+    mutate: (args: TArgs) => Promise<TResult>
+    isPending: boolean
+    error: Error | null
+}
+
+function useMutation<TArgs, TResult>(
+    callFn: (args: TArgs) => Promise<TResult>,
+): MutationHook<TArgs, TResult> {
+    const [isPending, setIsPending] = useState(false)
+    const [error, setError] = useState<Error | null>(null)
+
+    const mutate = useCallback(async (args: TArgs) => {
+        setIsPending(true)
+        setError(null)
+        try {
+            return await callFn(args)
+        } catch (e) {
+            setError(e as Error)
+            throw e
+        } finally {
+            setIsPending(false)
+        }
+    }, [callFn])
+
+    return { mutate, isPending, error }
+}
+
+// ── User Context ──
+
+const UserCtx = createContext<ContextState<UserContextData> | null>(null)
+
+export function UserContext({ children, ...params }: UserContextParams & { children: ReactNode }) {
+    const state = useContextSubscription('user', params, () => fetchUserContext(params))
+    return <UserCtx.Provider value={state}>{children}</UserCtx.Provider>
+}
+
+export function useUserContext(): ContextState<UserContextData> {
+    const ctx = useContext(UserCtx)
+    if (!ctx) throw new Error('useUserContext requires <UserContext>')
+    return ctx
+}
+
+export function useUserProfile(): userProfileOutput | null {
+    return useUserContext().data?.user_profile ?? null
+}
+
+export function useUserOrders(): userOrdersOutput | null {
+    return useUserContext().data?.user_orders ?? null
+}
+
+export function useUpdateProfile() {
+    return useMutation<Parameters<typeof callUpdateProfile>[0], Awaited<ReturnType<typeof callUpdateProfile>>>(callUpdateProfile)
+}
+
+export function useEcho() {
+    return useMutation<Parameters<typeof callEcho>[0], Awaited<ReturnType<typeof callEcho>>>(callEcho)
+}
+
+export function useWhoami() {
+    return useMutation<void, Awaited<ReturnType<typeof callWhoami>>>(() => callWhoami() as any)
+}
+
+export function useFindUser() {
+    return useMutation<Parameters<typeof callFindUser>[0], Awaited<ReturnType<typeof callFindUser>>>(callFindUser)
+}
+
+export function useRenameUser() {
+    return useMutation<Parameters<typeof callRenameUser>[0], Awaited<ReturnType<typeof callRenameUser>>>(callRenameUser)
+}
+
+// ── MizanContext root provider ──
+
+export interface MizanContextProps {
+    /** Base URL for protocol endpoints. Defaults to "/api/mizan". */
+    baseUrl?: string
+    /** Set to `false` for backends without a `/session/` endpoint (e.g. FastAPI). */
+    session?: boolean
+    children: ReactNode
+}
+
+/**
+ * Root provider — calls configure() once and mounts the global context (if defined).
+ * Must wrap any component using Mizan-generated hooks.
+ */
+export function MizanContext({ baseUrl, session, children }: MizanContextProps) {
+    const configured = useRef(false)
+    if (!configured.current) {
+        const opts: Parameters<typeof configure>[0] = {}
+        if (baseUrl !== undefined) opts.baseUrl = baseUrl
+        if (session !== undefined) opts.session = session
+        if (Object.keys(opts).length > 0) configure(opts)
+        configured.current = true
+    }
+    return <>{children}</>
+}
+
+// ── 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.
+ */
+export function useMizan() {
+    return { call: mizanCall, fetch: mizanFetch }
+}
+
+export type { ContextState } from '@mizan/base'
+export { configure, initSession, MizanError } from '@mizan/base'

protocol/mizan-codegen/tests/fixtures/baselines/react/types.ts

@@ -0,0 +1,64 @@
+// AUTO-GENERATED by mizan — do not edit
+
+export interface OrderOutput {
+    id: number
+    user_id: number
+    total: number
+}
+
+export interface echoInput {
+    text: string
+}
+
+export interface echoOutput {
+    message: string
+}
+
+export interface findUserInput {
+    user_id: number
+}
+
+export interface findUserOutput {
+    user_id: number
+    name: string
+}
+
+export interface renameUserInput {
+    user_id: number
+    name: string
+}
+
+export interface renameUserOutput {
+    user_id: number
+    name: string
+}
+
+export interface updateProfileInput {
+    user_id: number
+    name: string
+}
+
+export interface updateProfileOutput {
+    ok: boolean
+}
+
+export interface userOrdersInput {
+    user_id: number
+}
+
+export type userOrdersOutput = OrderOutput[]
+
+export interface userProfileInput {
+    user_id: number
+}
+
+export interface userProfileOutput {
+    user_id: number
+    name: string
+}
+
+export interface whoamiOutput {
+    email: string
+    authenticated: boolean
+}
+

protocol/mizan-codegen/tests/fixtures/baselines/rust/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "fixture_client"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+mizan-rust = { path = "../../../frontends/mizan-rust" }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+tokio = { version = "1", features = ["rt", "macros"] }

protocol/mizan-codegen/tests/fixtures/baselines/rust/src/contexts/mod.rs

@@ -0,0 +1,3 @@
+// AUTO-GENERATED by mizan — do not edit
+
+pub mod user;

protocol/mizan-codegen/tests/fixtures/baselines/rust/src/contexts/user.rs

@@ -0,0 +1,29 @@
+// AUTO-GENERATED by mizan — do not edit
+
+use serde::{Deserialize, Serialize};
+use serde_json::Value;
+
+use mizan_rust::{MizanClient, MizanError};
+
+use crate::types::{UserProfileOutput, UserOrdersOutput};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct UserContextData {
+    pub user_profile: UserProfileOutput,
+    pub user_orders: UserOrdersOutput,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct UserContextParams {
+    pub user_id: i64,
+}
+
+pub async fn fetch_user_context(
+    client: &MizanClient,
+    params: &UserContextParams,
+) -> Result<UserContextData, MizanError> {
+    let params_value = serde_json::to_value(params).unwrap_or(Value::Object(Default::default()));
+    let raw = client.fetch_context("user", &params_value).await?;
+    serde_json::from_value(raw)
+        .map_err(|e| MizanError::transport(format!("decode user context: {e}")))
+}

protocol/mizan-codegen/tests/fixtures/baselines/rust/src/functions/echo.rs

@@ -0,0 +1,14 @@
+// AUTO-GENERATED by mizan — do not edit
+
+use serde_json::Value;
+
+use mizan_rust::{MizanClient, MizanError};
+
+use crate::types::{EchoOutput, EchoInput};
+
+pub async fn call_echo(client: &MizanClient, args: &EchoInput) -> Result<EchoOutput, MizanError> {
+    let args_value = serde_json::to_value(args).unwrap_or(Value::Object(Default::default()));
+    let raw = client.call("echo", args_value).await?;
+    serde_json::from_value(raw)
+        .map_err(|e| MizanError::transport(format!("decode echo result: {e}")))
+}

protocol/mizan-codegen/tests/fixtures/baselines/rust/src/functions/find_user.rs

@@ -0,0 +1,14 @@
+// AUTO-GENERATED by mizan — do not edit
+
+use serde_json::Value;
+
+use mizan_rust::{MizanClient, MizanError};
+
+use crate::types::{FindUserOutput, FindUserInput};
+
+pub async fn call_find_user(client: &MizanClient, args: &FindUserInput) -> Result<Option<FindUserOutput>, MizanError> {
+    let args_value = serde_json::to_value(args).unwrap_or(Value::Object(Default::default()));
+    let raw = client.call("find_user", args_value).await?;
+    serde_json::from_value(raw)
+        .map_err(|e| MizanError::transport(format!("decode find_user result: {e}")))
+}

protocol/mizan-codegen/tests/fixtures/baselines/rust/src/functions/mod.rs

@@ -0,0 +1,6 @@
+// AUTO-GENERATED by mizan — do not edit
+
+pub mod echo;
+pub mod find_user;
+pub mod rename_user;
+pub mod whoami;

protocol/mizan-codegen/tests/fixtures/baselines/rust/src/functions/rename_user.rs

@@ -0,0 +1,14 @@
+// AUTO-GENERATED by mizan — do not edit
+
+use serde_json::Value;
+
+use mizan_rust::{MizanClient, MizanError};
+
+use crate::types::{RenameUserOutput, RenameUserInput};
+
+pub async fn call_rename_user(client: &MizanClient, args: &RenameUserInput) -> Result<RenameUserOutput, MizanError> {
+    let args_value = serde_json::to_value(args).unwrap_or(Value::Object(Default::default()));
+    let raw = client.call("rename_user", args_value).await?;
+    serde_json::from_value(raw)
+        .map_err(|e| MizanError::transport(format!("decode rename_user result: {e}")))
+}

protocol/mizan-codegen/tests/fixtures/baselines/rust/src/functions/whoami.rs

@@ -0,0 +1,14 @@
+// AUTO-GENERATED by mizan — do not edit
+
+use serde_json::Value;
+
+use mizan_rust::{MizanClient, MizanError};
+
+use crate::types::{WhoamiOutput};
+
+pub async fn call_whoami(client: &MizanClient) -> Result<WhoamiOutput, MizanError> {
+    let args_value = Value::Object(Default::default());
+    let raw = client.call("whoami", args_value).await?;
+    serde_json::from_value(raw)
+        .map_err(|e| MizanError::transport(format!("decode whoami result: {e}")))
+}

protocol/mizan-codegen/tests/fixtures/baselines/rust/src/lib.rs

@@ -0,0 +1,8 @@
+// AUTO-GENERATED by mizan — do not edit
+
+pub mod types;
+pub mod contexts;
+pub mod mutations;
+pub mod functions;
+
+pub use mizan_rust::{MizanClient, MizanConfig, MizanError};

protocol/mizan-codegen/tests/fixtures/baselines/rust/src/mutations/mod.rs

@@ -0,0 +1,3 @@
+// AUTO-GENERATED by mizan — do not edit
+
+pub mod update_profile;

protocol/mizan-codegen/tests/fixtures/baselines/rust/src/mutations/update_profile.rs

@@ -0,0 +1,14 @@
+// AUTO-GENERATED by mizan — do not edit
+
+use serde_json::Value;
+
+use mizan_rust::{MizanClient, MizanError};
+
+use crate::types::{UpdateProfileOutput, UpdateProfileInput};
+
+pub async fn call_update_profile(client: &MizanClient, args: &UpdateProfileInput) -> Result<UpdateProfileOutput, MizanError> {
+    let args_value = serde_json::to_value(args).unwrap_or(Value::Object(Default::default()));
+    let raw = client.call("update_profile", args_value).await?;
+    serde_json::from_value(raw)
+        .map_err(|e| MizanError::transport(format!("decode update_profile result: {e}")))
+}

protocol/mizan-codegen/tests/fixtures/baselines/rust/src/types.rs

@@ -0,0 +1,81 @@
+// AUTO-GENERATED by mizan — do not edit
+
+#![allow(non_camel_case_types)]
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct OrderOutput {
+    pub id: i64,
+    pub user_id: i64,
+    pub total: i64,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct EchoInput {
+    pub text: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct EchoOutput {
+    pub message: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct FindUserInput {
+    pub user_id: i64,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct FindUserOutput {
+    pub user_id: i64,
+    pub name: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct RenameUserInput {
+    pub user_id: i64,
+    pub name: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct RenameUserOutput {
+    pub user_id: i64,
+    pub name: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct UpdateProfileInput {
+    pub user_id: i64,
+    pub name: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct UpdateProfileOutput {
+    pub ok: bool,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct UserOrdersInput {
+    pub user_id: i64,
+}
+
+pub type UserOrdersOutput = Vec<OrderOutput>;
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct UserProfileInput {
+    pub user_id: i64,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct UserProfileOutput {
+    pub user_id: i64,
+    pub name: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct WhoamiOutput {
+    pub email: String,
+    pub authenticated: bool,
+}
+

protocol/mizan-codegen/tests/fixtures/baselines/stage1/contexts/user.ts

@@ -0,0 +1,18 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanFetch } from '@mizan/base'
+
+import type { userProfileOutput, userOrdersOutput } from '../types'
+
+export interface UserContextData {
+    user_profile: userProfileOutput
+    user_orders: userOrdersOutput
+}
+
+export interface UserContextParams {
+    user_id: number
+}
+
+export function fetchUserContext(params: UserContextParams): Promise<UserContextData> {
+    return mizanFetch('user', params)
+}

protocol/mizan-codegen/tests/fixtures/baselines/stage1/functions/echo.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { echoInput, echoOutput } from '../types'
+
+export function callEcho(args: echoInput): Promise<echoOutput> {
+    return mizanCall('echo', args)
+}

protocol/mizan-codegen/tests/fixtures/baselines/stage1/functions/findUser.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { findUserInput, findUserOutput } from '../types'
+
+export function callFindUser(args: findUserInput): Promise<findUserOutput> {
+    return mizanCall('find_user', args)
+}

protocol/mizan-codegen/tests/fixtures/baselines/stage1/functions/renameUser.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { renameUserInput, renameUserOutput } from '../types'
+
+export function callRenameUser(args: renameUserInput): Promise<renameUserOutput> {
+    return mizanCall('rename_user', args)
+}

protocol/mizan-codegen/tests/fixtures/baselines/stage1/functions/whoami.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { whoamiOutput } from '../types'
+
+export function callWhoami(): Promise<whoamiOutput> {
+    return mizanCall('whoami', {})
+}

protocol/mizan-codegen/tests/fixtures/baselines/stage1/index.ts

@@ -0,0 +1,11 @@
+// AUTO-GENERATED by mizan — do not edit
+
+export * from './types'
+
+export { fetchUserContext, type UserContextData, type UserContextParams } from './contexts/user'
+
+export { callEcho } from './functions/echo'
+export { callWhoami } from './functions/whoami'
+export { callUpdateProfile } from './mutations/updateProfile'
+export { callFindUser } from './functions/findUser'
+export { callRenameUser } from './functions/renameUser'

protocol/mizan-codegen/tests/fixtures/baselines/stage1/mutations/updateProfile.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { updateProfileInput, updateProfileOutput } from '../types'
+
+export function callUpdateProfile(args: updateProfileInput): Promise<updateProfileOutput> {
+    return mizanCall('update_profile', args)
+}

protocol/mizan-codegen/tests/fixtures/baselines/stage1/types.ts

@@ -0,0 +1,64 @@
+// AUTO-GENERATED by mizan — do not edit
+
+export interface OrderOutput {
+    id: number
+    user_id: number
+    total: number
+}
+
+export interface echoInput {
+    text: string
+}
+
+export interface echoOutput {
+    message: string
+}
+
+export interface findUserInput {
+    user_id: number
+}
+
+export interface findUserOutput {
+    user_id: number
+    name: string
+}
+
+export interface renameUserInput {
+    user_id: number
+    name: string
+}
+
+export interface renameUserOutput {
+    user_id: number
+    name: string
+}
+
+export interface updateProfileInput {
+    user_id: number
+    name: string
+}
+
+export interface updateProfileOutput {
+    ok: boolean
+}
+
+export interface userOrdersInput {
+    user_id: number
+}
+
+export type userOrdersOutput = OrderOutput[]
+
+export interface userProfileInput {
+    user_id: number
+}
+
+export interface userProfileOutput {
+    user_id: number
+    name: string
+}
+
+export interface whoamiOutput {
+    email: string
+    authenticated: boolean
+}
+

protocol/mizan-codegen/tests/fixtures/baselines/svelte/contexts/user.ts

@@ -0,0 +1,18 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanFetch } from '@mizan/base'
+
+import type { userProfileOutput, userOrdersOutput } from '../types'
+
+export interface UserContextData {
+    user_profile: userProfileOutput
+    user_orders: userOrdersOutput
+}
+
+export interface UserContextParams {
+    user_id: number
+}
+
+export function fetchUserContext(params: UserContextParams): Promise<UserContextData> {
+    return mizanFetch('user', params)
+}

protocol/mizan-codegen/tests/fixtures/baselines/svelte/functions/echo.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { echoInput, echoOutput } from '../types'
+
+export function callEcho(args: echoInput): Promise<echoOutput> {
+    return mizanCall('echo', args)
+}

protocol/mizan-codegen/tests/fixtures/baselines/svelte/functions/findUser.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { findUserInput, findUserOutput } from '../types'
+
+export function callFindUser(args: findUserInput): Promise<findUserOutput> {
+    return mizanCall('find_user', args)
+}

protocol/mizan-codegen/tests/fixtures/baselines/svelte/functions/renameUser.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { renameUserInput, renameUserOutput } from '../types'
+
+export function callRenameUser(args: renameUserInput): Promise<renameUserOutput> {
+    return mizanCall('rename_user', args)
+}

protocol/mizan-codegen/tests/fixtures/baselines/svelte/functions/whoami.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { whoamiOutput } from '../types'
+
+export function callWhoami(): Promise<whoamiOutput> {
+    return mizanCall('whoami', {})
+}

protocol/mizan-codegen/tests/fixtures/baselines/svelte/index.ts

@@ -0,0 +1,14 @@
+// AUTO-GENERATED by mizan — do not edit
+
+export * from './types'
+
+export { fetchUserContext, type UserContextData, type UserContextParams } from './contexts/user'
+
+export { callEcho } from './functions/echo'
+export { callWhoami } from './functions/whoami'
+export { callUpdateProfile } from './mutations/updateProfile'
+export { callFindUser } from './functions/findUser'
+export { callRenameUser } from './functions/renameUser'
+
+// Stage 2 framework adapter
+export * from './svelte'

protocol/mizan-codegen/tests/fixtures/baselines/svelte/mutations/updateProfile.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { updateProfileInput, updateProfileOutput } from '../types'
+
+export function callUpdateProfile(args: updateProfileInput): Promise<updateProfileOutput> {
+    return mizanCall('update_profile', args)
+}

protocol/mizan-codegen/tests/fixtures/baselines/svelte/svelte.ts

@@ -0,0 +1,29 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { readable, type Readable } from 'svelte/store'
+import { registerContext, type ContextState } from '@mizan/base'
+
+import { fetchUserContext, type UserContextData, type UserContextParams, callUpdateProfile, callEcho, callWhoami, callFindUser, callRenameUser } from '../index'
+
+export function createUserContext(params: UserContextParams) {
+    const store = readable<ContextState<UserContextData>>(
+        { data: null, status: 'idle', error: null },
+        (set) => {
+            const handle = registerContext('user', params, () => fetchUserContext(params))
+            const unsub = handle.subscribe(() => set(handle.getState()))
+            handle.refetch()
+            return () => { unsub(); handle.unregister() }
+        },
+    )
+
+    return store
+}
+
+export { callUpdateProfile } from '../index'
+export { callEcho } from '../index'
+export { callWhoami } from '../index'
+export { callFindUser } from '../index'
+export { callRenameUser } from '../index'
+
+export type { ContextState } from '@mizan/base'
+export { configure, initSession, MizanError } from '@mizan/base'

protocol/mizan-codegen/tests/fixtures/baselines/svelte/types.ts

@@ -0,0 +1,64 @@
+// AUTO-GENERATED by mizan — do not edit
+
+export interface OrderOutput {
+    id: number
+    user_id: number
+    total: number
+}
+
+export interface echoInput {
+    text: string
+}
+
+export interface echoOutput {
+    message: string
+}
+
+export interface findUserInput {
+    user_id: number
+}
+
+export interface findUserOutput {
+    user_id: number
+    name: string
+}
+
+export interface renameUserInput {
+    user_id: number
+    name: string
+}
+
+export interface renameUserOutput {
+    user_id: number
+    name: string
+}
+
+export interface updateProfileInput {
+    user_id: number
+    name: string
+}
+
+export interface updateProfileOutput {
+    ok: boolean
+}
+
+export interface userOrdersInput {
+    user_id: number
+}
+
+export type userOrdersOutput = OrderOutput[]
+
+export interface userProfileInput {
+    user_id: number
+}
+
+export interface userProfileOutput {
+    user_id: number
+    name: string
+}
+
+export interface whoamiOutput {
+    email: string
+    authenticated: boolean
+}
+

protocol/mizan-codegen/tests/fixtures/baselines/vue/contexts/user.ts

@@ -0,0 +1,18 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanFetch } from '@mizan/base'
+
+import type { userProfileOutput, userOrdersOutput } from '../types'
+
+export interface UserContextData {
+    user_profile: userProfileOutput
+    user_orders: userOrdersOutput
+}
+
+export interface UserContextParams {
+    user_id: number
+}
+
+export function fetchUserContext(params: UserContextParams): Promise<UserContextData> {
+    return mizanFetch('user', params)
+}

protocol/mizan-codegen/tests/fixtures/baselines/vue/functions/echo.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { echoInput, echoOutput } from '../types'
+
+export function callEcho(args: echoInput): Promise<echoOutput> {
+    return mizanCall('echo', args)
+}

protocol/mizan-codegen/tests/fixtures/baselines/vue/functions/findUser.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { findUserInput, findUserOutput } from '../types'
+
+export function callFindUser(args: findUserInput): Promise<findUserOutput> {
+    return mizanCall('find_user', args)
+}

protocol/mizan-codegen/tests/fixtures/baselines/vue/functions/renameUser.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { renameUserInput, renameUserOutput } from '../types'
+
+export function callRenameUser(args: renameUserInput): Promise<renameUserOutput> {
+    return mizanCall('rename_user', args)
+}

protocol/mizan-codegen/tests/fixtures/baselines/vue/functions/whoami.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { whoamiOutput } from '../types'
+
+export function callWhoami(): Promise<whoamiOutput> {
+    return mizanCall('whoami', {})
+}

protocol/mizan-codegen/tests/fixtures/baselines/vue/index.ts

@@ -0,0 +1,14 @@
+// AUTO-GENERATED by mizan — do not edit
+
+export * from './types'
+
+export { fetchUserContext, type UserContextData, type UserContextParams } from './contexts/user'
+
+export { callEcho } from './functions/echo'
+export { callWhoami } from './functions/whoami'
+export { callUpdateProfile } from './mutations/updateProfile'
+export { callFindUser } from './functions/findUser'
+export { callRenameUser } from './functions/renameUser'
+
+// Stage 2 framework adapter
+export * from './vue'

protocol/mizan-codegen/tests/fixtures/baselines/vue/mutations/updateProfile.ts

@@ -0,0 +1,9 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { mizanCall } from '@mizan/base'
+
+import type { updateProfileInput, updateProfileOutput } from '../types'
+
+export function callUpdateProfile(args: updateProfileInput): Promise<updateProfileOutput> {
+    return mizanCall('update_profile', args)
+}

protocol/mizan-codegen/tests/fixtures/baselines/vue/types.ts

@@ -0,0 +1,64 @@
+// AUTO-GENERATED by mizan — do not edit
+
+export interface OrderOutput {
+    id: number
+    user_id: number
+    total: number
+}
+
+export interface echoInput {
+    text: string
+}
+
+export interface echoOutput {
+    message: string
+}
+
+export interface findUserInput {
+    user_id: number
+}
+
+export interface findUserOutput {
+    user_id: number
+    name: string
+}
+
+export interface renameUserInput {
+    user_id: number
+    name: string
+}
+
+export interface renameUserOutput {
+    user_id: number
+    name: string
+}
+
+export interface updateProfileInput {
+    user_id: number
+    name: string
+}
+
+export interface updateProfileOutput {
+    ok: boolean
+}
+
+export interface userOrdersInput {
+    user_id: number
+}
+
+export type userOrdersOutput = OrderOutput[]
+
+export interface userProfileInput {
+    user_id: number
+}
+
+export interface userProfileOutput {
+    user_id: number
+    name: string
+}
+
+export interface whoamiOutput {
+    email: string
+    authenticated: boolean
+}
+

protocol/mizan-codegen/tests/fixtures/baselines/vue/vue.ts

@@ -0,0 +1,96 @@
+// AUTO-GENERATED by mizan — do not edit
+
+import { ref, computed, onMounted, onUnmounted, onServerPrefetch, type ComputedRef } from 'vue'
+import { registerContext, type ContextState } from '@mizan/base'
+
+import { fetchUserContext, type UserContextData, type UserContextParams, callUpdateProfile, callEcho, callWhoami, callFindUser, callRenameUser } from '../index'
+
+export function useUserContext(params: UserContextParams) {
+    const state = ref<ContextState<UserContextData>>({ data: null, status: 'idle', error: null })
+    let handle: ReturnType<typeof registerContext> | null = null
+
+    onMounted(() => {
+        handle = registerContext('user', params, () => fetchUserContext(params))
+        handle.subscribe(() => { state.value = handle!.getState() })
+        handle.refetch()
+    })
+
+    onServerPrefetch(async () => {
+        handle = registerContext('user', params, () => fetchUserContext(params))
+        await handle.refetch()
+        state.value = handle.getState()
+    })
+
+    onUnmounted(() => { handle?.unregister() })
+
+    return {
+        state,
+        userProfile: computed(() => state.value.data?.user_profile ?? null) as ComputedRef<userProfileOutput | null>,
+        userOrders: computed(() => state.value.data?.user_orders ?? null) as ComputedRef<userOrdersOutput | null>,
+        loading: computed(() => state.value.status === 'loading'),
+        error: computed(() => state.value.error),
+    }
+}
+
+export function useUpdateProfile() {
+    const isPending = ref(false)
+    const error = ref<Error | null>(null)
+    async function mutate(args: Parameters<typeof callUpdateProfile>[0]) {
+        isPending.value = true; error.value = null
+        try { return await callUpdateProfile(args) }
+        catch (e) { error.value = e as Error; throw e }
+        finally { isPending.value = false }
+    }
+    return { mutate, isPending, error }
+}
+
+export function useEcho() {
+    const isPending = ref(false)
+    const error = ref<Error | null>(null)
+    async function mutate(args: Parameters<typeof callEcho>[0]) {
+        isPending.value = true; error.value = null
+        try { return await callEcho(args) }
+        catch (e) { error.value = e as Error; throw e }
+        finally { isPending.value = false }
+    }
+    return { mutate, isPending, error }
+}
+
+export function useWhoami() {
+    const isPending = ref(false)
+    const error = ref<Error | null>(null)
+    async function mutate() {
+        isPending.value = true; error.value = null
+        try { return await callWhoami() }
+        catch (e) { error.value = e as Error; throw e }
+        finally { isPending.value = false }
+    }
+    return { mutate, isPending, error }
+}
+
+export function useFindUser() {
+    const isPending = ref(false)
+    const error = ref<Error | null>(null)
+    async function mutate(args: Parameters<typeof callFindUser>[0]) {
+        isPending.value = true; error.value = null
+        try { return await callFindUser(args) }
+        catch (e) { error.value = e as Error; throw e }
+        finally { isPending.value = false }
+    }
+    return { mutate, isPending, error }
+}
+
+export function useRenameUser() {
+    const isPending = ref(false)
+    const error = ref<Error | null>(null)
+    async function mutate(args: Parameters<typeof callRenameUser>[0]) {
+        isPending.value = true; error.value = null
+        try { return await callRenameUser(args) }
+        catch (e) { error.value = e as Error; throw e }
+        finally { isPending.value = false }
+    }
+    return { mutate, isPending, error }
+}
+
+export type { ContextState } from '@mizan/base'
+export { configure, initSession, MizanError } from '@mizan/base'