Restructure tree by role; rename mizan-runtime → mizan-base

packages/ flattens into:
  backends/   server protocol adapters (mizan-django, mizan-ts)
  frontends/  client kernel + framework adapters (mizan-base, mizan-react, mizan-vue, mizan-svelte)
  workers/    runtime workers (mizan-ssr)
  cores/      shared language-level primitives (empty for now; mizan-python forthcoming)

The frontend kernel (was packages/mizan-runtime, now frontends/mizan-base) is
renamed to reflect its role — it's the shared base that frontend adapters
depend on directly. Reflects the substrate position that per-framework adapters
wrap a single shared kernel; codegen targets the adapter, not the raw kernel.

Path updates landed in: Makefile, two Gitea workflows, Dockerfile.test, four
example/harness config files, .claude/settings.local.json, four docs
(CLAUDE/ISSUES/ROADMAP/AFI_ARCHITECTURE), four codegen templates (stage1 +
react/vue/svelte adapters), and three package.jsons (the mizan-base rename
plus mizan-vue/svelte peerDeps).

Generated files under examples/django-react-site/harness/src/api/ still
reference @mizan/runtime — left as-is; they're regenerated artifacts and
the harness is non-functional pending the React wrapper-layer codegen.

Also folded in a pre-existing fix: the Gitea workflows had
working-directory: react / django pointing at a layout that predates
packages/, never updated.

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

backends/mizan-django/generate/generator/lib/adapters/react.mjs

@@ -0,0 +1,180 @@
+/**
+ * React Stage 2 — Generates hooks + context providers from Stage 1 output.
+ *
+ * Generated providers subscribe to the runtime kernel for state.
+ * The kernel owns data, status, and error. React just renders.
+ */
+
+function pascalCase(str) {
+    return str.split(/[.\-_]/).map(p => p.charAt(0).toUpperCase() + p.slice(1)).join('')
+}
+
+export function generateReactAdapter(schema) {
+    const functions = schema['x-mizan-functions'] || []
+    const contextGroups = schema['x-mizan-contexts'] || {}
+    const namedContexts = Object.entries(contextGroups).filter(([n]) => n !== 'global')
+    const globalContexts = functions.filter(fn => fn.isContext === 'global')
+    const mutations = functions.filter(fn => !fn.isContext && !fn.isForm && fn.affects)
+    const plainFns = functions.filter(fn => !fn.isContext && !fn.isForm && !fn.affects)
+
+    const lines = [
+        "'use client'",
+        '',
+        '// AUTO-GENERATED by mizan — do not edit',
+        '',
+        "import { createContext, useContext, useState, useEffect, useCallback, useRef, useSyncExternalStore, type ReactNode } from 'react'",
+        "import { registerContext, mizanFetch, mizanCall, type ContextState } from '@mizan/runtime'",
+        '',
+    ]
+
+    // Import from Stage 1
+    const stage1Imports = []
+    for (const [ctxName] of Object.entries(contextGroups)) {
+        const p = pascalCase(ctxName)
+        stage1Imports.push(`fetch${p}Context`, `type ${p}ContextData`, `type ${p}ContextParams`)
+    }
+    for (const fn of [...mutations, ...plainFns]) {
+        stage1Imports.push(`call${pascalCase(fn.camelName)}`)
+    }
+    if (stage1Imports.length > 0) {
+        lines.push(`import { ${stage1Imports.join(', ')} } from '../index'`)
+        lines.push('')
+    }
+
+    // ── Helper hook: subscribe to kernel state ──────────────────────────
+
+    lines.push('// Subscribe to kernel state via useSyncExternalStore')
+    lines.push('function useContextState<T>(')
+    lines.push('    name: string,')
+    lines.push('    params: Record<string, any>,')
+    lines.push('    fetchFn: () => Promise<T>,')
+    lines.push('    initialData?: T,')
+    lines.push('): ContextState<T> {')
+    lines.push('    const ref = useRef<ReturnType<typeof registerContext> | null>(null)')
+    lines.push('')
+    lines.push('    if (!ref.current) {')
+    lines.push('        ref.current = registerContext(name, params, fetchFn, initialData)')
+    lines.push('    }')
+    lines.push('')
+    lines.push('    const handle = ref.current')
+    lines.push('')
+    lines.push('    // Fetch on mount if no data')
+    lines.push('    useEffect(() => {')
+    lines.push("        if (handle.getState().status === 'idle') handle.refetch()")
+    lines.push('        return () => handle.unregister()')
+    lines.push('    }, [handle])')
+    lines.push('')
+    lines.push('    return useSyncExternalStore(')
+    lines.push('        handle.subscribe,')
+    lines.push('        handle.getState,')
+    lines.push('        handle.getState,')
+    lines.push('    )')
+    lines.push('}')
+    lines.push('')
+
+    // ── Mutation hook helper ────────────────────────────────────────────
+
+    lines.push('// Mutation hook with loading/error state')
+    lines.push('function useMutation<TArgs, TResult>(')
+    lines.push('    callFn: (args: TArgs) => Promise<TResult>,')
+    lines.push('): { mutate: (args: TArgs) => Promise<TResult>; isPending: boolean; error: Error | null } {')
+    lines.push('    const [isPending, setIsPending] = useState(false)')
+    lines.push('    const [error, setError] = useState<Error | null>(null)')
+    lines.push('')
+    lines.push('    const mutate = useCallback(async (args: TArgs) => {')
+    lines.push('        setIsPending(true)')
+    lines.push('        setError(null)')
+    lines.push('        try {')
+    lines.push('            const result = await callFn(args)')
+    lines.push('            return result')
+    lines.push('        } catch (e) {')
+    lines.push('            setError(e as Error)')
+    lines.push('            throw e')
+    lines.push('        } finally {')
+    lines.push('            setIsPending(false)')
+    lines.push('        }')
+    lines.push('    }, [callFn])')
+    lines.push('')
+    lines.push('    return { mutate, isPending, error }')
+    lines.push('}')
+    lines.push('')
+
+    // ── Context hooks ───────────────────────────────────────────────────
+
+    for (const [ctxName, ctxMeta] of Object.entries(contextGroups)) {
+        const p = pascalCase(ctxName)
+        const ctxFunctions = functions.filter(fn => fn.isContext === ctxName)
+        const paramEntries = Object.entries(ctxMeta.params || {})
+
+        lines.push(`// ── ${p} Context ──`)
+        lines.push('')
+
+        // Hook that returns the full kernel state
+        if (paramEntries.length > 0) {
+            lines.push(`export function use${p}Context(params: ${p}ContextParams): ContextState<${p}ContextData> {`)
+            lines.push(`    const ssrData = typeof window !== 'undefined' ? (window as any).__MIZAN_SSR_DATA__ : null`)
+            lines.push(`    return useContextState('${ctxName}', params, () => fetch${p}Context(params), ssrData)`)
+        } else {
+            lines.push(`export function use${p}Context(): ContextState<${p}ContextData> {`)
+            lines.push(`    const ssrData = typeof window !== 'undefined' ? (window as any).__MIZAN_SSR_DATA__ : null`)
+            lines.push(`    return useContextState('${ctxName}', {}, () => fetch${p}Context({} as any), ssrData)`)
+        }
+        lines.push('}')
+        lines.push('')
+
+        // Convenience hooks for individual data fields
+        for (const fn of ctxFunctions) {
+            const hookPascal = pascalCase(fn.camelName)
+            if (paramEntries.length > 0) {
+                lines.push(`export function use${hookPascal}(params: ${p}ContextParams): ${fn.outputType} | null {`)
+                lines.push(`    const state = use${p}Context(params)`)
+            } else {
+                lines.push(`export function use${hookPascal}(): ${fn.outputType} | null {`)
+                lines.push(`    const state = use${p}Context()`)
+            }
+            lines.push(`    return state.data?.${fn.name} ?? null`)
+            lines.push('}')
+            lines.push('')
+        }
+    }
+
+    // ── Mutation hooks (with loading/error) ──────────────────────────────
+
+    for (const fn of mutations) {
+        const p = pascalCase(fn.camelName)
+        if (fn.hasInput) {
+            lines.push(`export function use${p}() {`)
+            lines.push(`    return useMutation<Parameters<typeof call${p}>[0], Awaited<ReturnType<typeof call${p}>>>(call${p})`)
+            lines.push('}')
+        } else {
+            lines.push(`export function use${p}() {`)
+            lines.push(`    return useMutation<void, Awaited<ReturnType<typeof call${p}>>>(() => call${p}() as any)`)
+            lines.push('}')
+        }
+        lines.push('')
+    }
+
+    // ── Plain function hooks ────────────────────────────────────────────
+
+    for (const fn of plainFns) {
+        const p = pascalCase(fn.camelName)
+        if (fn.hasInput) {
+            lines.push(`export function use${p}() {`)
+            lines.push(`    return useMutation<Parameters<typeof call${p}>[0], Awaited<ReturnType<typeof call${p}>>>(call${p})`)
+            lines.push('}')
+        } else {
+            lines.push(`export function use${p}() {`)
+            lines.push(`    return useMutation<void, Awaited<ReturnType<typeof call${p}>>>(() => call${p}() as any)`)
+            lines.push('}')
+        }
+        lines.push('')
+    }
+
+    // ── Re-export runtime types ─────────────────────────────────────────
+
+    lines.push("export type { ContextState } from '@mizan/runtime'")
+    lines.push("export { configure, initSession, MizanError } from '@mizan/runtime'")
+    lines.push('')
+
+    return lines.join('\n')
+}